Product Catalog VariTrane™ Products Parallel and Series Fan-Powered VPCF, VPWF, VPEF, VSCF, VSWF, VSEF, LPCF, LPWF, LPEF, LSCF, LSWF, LSEF Variable-Air-Volume (VAV) System RA EA OA supply fan PA VAV box cooling coil variablespeed drive thermostat SA July 2013 VAV-PRC012-EN
Introduction Fan-powered units offer energy savings due to intermittent fan control.The fan energizes only in heating mode when the space needs heat. Additional energy savings are obtained by using warm plenum air for free reheat. Motor heat is never wasted in parallel units.They are an excellent choice when minimal zone heating is needed. Figure 1. Parallel fan-powered terminal unit (L) & series fan-powered terminal units (R) Figure 2. Low height series: LSCF (L) & low height series: LSWF (R) Figure 3.
Table of Contents Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Agency Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Model Number Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Performance Data . . . . . . . . .
Flow Tracking Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 LonMark™ Direct Digital Controller—Unit Control Module . . . . . . . . . . . 166 Direct Digital Controller—Unit Control Module . . . . . . . . . . . . . . . . . . . . . 169 Wireless Comm Interface (WCI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 Wireless Receiver/Wireless Zone Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . 172 DDC Zone Sensor . . . . . . . .
Features and Benefits VariTrane™– VAV Leadership VariTrane variable-air-volume (VAV) units lead the industry in quality and reliability and are designed to meet the specific needs of today’s applications.This generation of VariTrane units builds upon the history of quality and reliability and expands the products into the most complete VAV offering in the industry. Parallel Fan-powered units offer energy savings due to intermittent fan control.
Features and Benefits • Fan Pressure Optimization- reduces supply fan energy by as much as 40% by intelligently reducing the pressure in the air distribution system to the lowest possible level without impacting occupant comfort. • Night setback reduces energy consumption during unoccupied periods by raising or lowering space temperature setpoints.
Features and Benefits Construction UL-listed products— Safety and reliability are vital in commercial construction. All VariTrane units are completely listed in accordance with UL -1995 as terminal units.This listing includes the VAV terminal with electric heaters. Additionally, all insulation materials pass UL 25/50 smoke and flame safety standards. AHRI Certified Performance— All VariTrane units are AHRI certified.
Features and Benefits External Shaft—The simple design provides controller flexibility and is designed to facilitate actuator field replacement. Position Indicator—The position indicator shows current air valve position to aid in system commissioning. Many times this can be seen from the floor without climbing a ladder. External Actuator—This feature increases serviceability, control system compatibility, and actuator clutch access for simplified commissioning.
Features and Benefits Tracer™ Building Automation System Tracer Building Automation System assures comfort within your building. Building controls have a bigger job description than they did a few years ago. It’s no longer enough to control heating and cooling systems and equipment. Sophisticated buildings require smarter technology that will carry into the future.
Features and Benefits Tracer BACnet™ Controllers Trane now offers a full line of BACnet controllers designed for simple integration into any system which can communicate via the BACnet protocol.These controllers are factory-commissioned and shipped ready to be installed. UC210 BACnet Controller UC400 BACnet Controller Trane Wireless Comm Interface (WCI) WCI controller Provides wireless communication between theTracer SC, Tracer Unit Controllers, and BACnet™ Communication Interface (BCI) modules.
Features and Benefits Pneumatic Controller Pneumatic Controller Pneumatic—Pneumatic controllers provide proven reliability and performance. A full line of options provide: • Highest quality PVR available, which maximizes zone temperature control. Pressure-independent operation • AllVariTrane pneumatic controllers use the patented flow sensor input to provide the most accurate performance available.
Features and Benefits Table 1. Factory-installed vs.
Agency Certifications There are numerous regulations and standards in the industry that determine the construction and performance parameters for VAV terminal units. Some of the more important of those standards and regulations are listed below, along with a brief description of what each one addresses. American Society of Heating, Refrigerating and Air-conditioning Engineers (ASHRAE) - 41.1 ASHRAE - 41.2 ASHRAE - 41.3 These standards specify methods for temperature measurement (41.
Agency Certifications National Fire Protection Association NFPA 70 This standard is also known as the National Electrical Code (NEC).The Code gives standards for installation of wiring and electrical equipment for most types of commercial and residential buildings. It is often referred to inVAV air terminal specifications when fan-powered boxes, electric heat or electric controls are included.
Model Number Descriptions Digit 1, 2—Unit Type VP = VS = LP = LS = VariTrane™ Fan-Powered Parallel VariTrane Fan-Powered Series VariTrane Fan-Powered Low-Height Parallel VariTrane Fan-Powered Low-Height Series Digit 3—Reheat C = E = W = Cooling Only Electric Heat Hot Water Heat Digit 4—Development Sequence F = Sixth Digit 5, 6—Primary Air Valve 05 = 06 = 08 = 10 = 12 = 14 = 16 = RT = Note: 5" inlet (350 max cfm) 6" inlet (500 max cfm) 8" inlet (900 max cfm) 10" inlet (1400 max cfm) 12" inlet (2000 m
Model Number Descriptions Digit 18—Motor Voltage Digit 26—Electric Heat Voltage Digit 35—Wireless Sensors 1 2 3 4 5 0 = A = B = C = D = E = F = G = H = J = K = Note: 0 1 = = 2 = = = = = = 115/60/1 277/60/1 347/60/1 208/60/1 230/50/1 Digit 19—Outlet Connection 1 2 = = Flanged Slip & Drive Digit 20—Attenuator 0 = W = No Attenuator With Attenuator Digit 21—Water Coil 0 1 2 3 4 5 6 A B C = = = = = = = = = = D = E = F = Note: None 1-Row–Plenum inlet installed RH 2-Row–Plenum inlet insta
Selection Procedure This section describes elements and process required to properly select fan-powered VAV terminals, and includes a specific examples. Selection procedure is iterative in nature which makes computer selection desirable. Selection of fan-powered VAV terminals involves four elements: • Air valve selection • Heating coil selection • Fan size and selection • Acoustics Note: Use the same procedures for selecting Low-Height Fan-Powered Units.
Selection Procedure Capacity Requirement Once both coil EAT and LAT are determined, the heat transfer (Q) for the coil must be calculated using the heat transfer equation. For electric heat units, the Q value must be converted from Btu to kW for heater selection.The required kW should be compared to availability charts in the performance data section for the unit selected.
Selection Procedure Fan Generated Noise To determine fan noise levels, fan airflow, external static pressure and speed information is required. Evaluation Elements For parallel fan-powered terminal units, the air valve and fan operation must be evaluated separately because these operations are not simultaneous. For Series fan-powered units, the air valve and fan are evaluated together because they have simultaneous operation.
Selection Procedure For the heating coil, the temperature difference is the calculated coil LAT minus the coil EAT (Plenum AirTemperature). Coil Q = 1.085 x 400 x (116-70) = 19,964 Btu = 19.96 Mbh Coil Performance Table Selection: Size 02SQ fan, 1-row coil with 2 gpm =20.53 Mbh (at 400 cfm) 1-row coil with 2 gpm = 2.57 ft WPD Fan Selection Required Information: Design airflow: 400 cfm Downstream static pressure at design airflow: 0.25 in.
Selection Procedure Design Cooling (1000 cfm). Radiated valve typically sets the NC for parallel units in cooling mode. The closest tabulated condition (1100 cfm at 1.0 in. wg ISP) has an NC=31. (A more accurate selection can be done viaTOPSS electronic selection program.): Table 2. Selection Program Output (Radiated Valve): Octave Band 2 3 4 5 6 7 NC Sound Power 65 60 53 48 41 32 30 Design Heating (200 cfm valve, 400 cfm fan, 0.25 in. wg DSP).
Selection Procedure Selection Example—Series With Hot Water Heat and ECM Air Valve Selection Required Information: Design cooling airflow: 1000 cfm Minimum ventilation airflow: 200 cfm Maximum unit APD: 0.40 in. wg A 10" air valve is selected. Check–is minimum airflow above 300 FPM? Answer–Yes. Minimum cfm allowable = 165 cfm. (See General Data—Valve/Controller Guidelines pp FPS 8). The 03SQ fan will be used in this instance.
Selection Procedure If an attenuator is required, use attenuator air pressure drop tables to define additional fan static pressure. Acoustics Required Information. Design inlet static press: 0.75 in. wg NC criteria (general office space): NC-40 The selection is a VSWF Series Fan-PoweredTerminal Unit, 10" primary, series fan size 03SQ, with a 1-row hot water coil. Determine the casing radiated noise level because it typically dictates the sound level (NC) of the space.
Performance Data Parallel Fan-Powered Terminal Units Table 4. Primary airflow control factory setting-I-P Control Type Air Valve Size (in.
Performance Data Table 6. Unit air pressure drop – in. wg (I-P) (continued) Fan/Inlet Size Airflow Cfm Cooling Only Fan/Inlet Size Airflow Cfm Cooling Only 02SQ-10 165 550 950 1400 0.01 0.01 0.01 0.01 05SQ-14 320 1200 2100 3000 0.01 0.01 0.01 0.01 03SQ-06 60 200 350 500 0.01 0.06 0.19 0.40 06SQ-10 165 550 950 1400 0.01 0.01 0.01 0.01 03SQ-08 105 350 600 900 0.01 0.03 0.08 0.20 06SQ-12 240 750 1350 2000 0.01 0.01 0.01 0.01 03SQ-10 165 550 950 1400 0.01 0.01 0.02 0.
Performance Data Table 8. Attenuator air pressure drop (I-P) Fan Size Plenum Cfm Attenuator Fan Size Plenum Cfm Attenuator 02SQ 50 200 350 500 650 750 0.00 0.00 0.01 0.02 0.04 0.06 05SQ 50 300 600 900 1200 1550 0.00 0.00 0.02 0.06 0.13 0.24 03SQ 50 250 500 750 1000 1200 0.00 0.00 0.00 0.00 0.01 0.06 06SQ 50 500 900 1300 1650 1900 0.00 0.01 0.03 0.06 0.10 0.14 04SQ 50 300 600 900 1200 1450 0.00 0.01 0.02 0.03 0.05 0.06 07SQ 50 500 1000 1500 2000 2500 0.00 0.01 0.04 0.08 0.15 0.
Performance Data Table 10. Coil air pressure drop – Pa (SI) 10 18 28 41 56 67 5 9 15 22 30 36 900 1200 1500 1800 2150 2500 06SQ 07SQ Note: HW Coil Only pressure drops do not include unit pressure drop. Table 11.
Performance Data In. wg 0.60 125 0.50 100 0.40 75 0.30 50 0.20 25 0.10 100 200 300 400 500 600 700 Cfm 47 94 142 189 236 283 330 L/s 120 cfm min (57 L/s) Discharge Static Pressure Pa Parallel 02SQ—PSC 150 Airflow Parallel Fan Size 03SQ—PSC Pa In. wg 199 0.80 174 0.70 150 0.60 125 0.50 100 0.40 75 0.30 50 0.20 25 0.
Performance Data Parallel 05SQ—PSC In. wg 0.80 174 0.70 150 0.60 125 0.50 100 0.40 75 0.30 50 0.20 25 0.10 300 500 700 900 1100 1300 1500 1700 Cfm 142 236 330 425 519 614 708 802 L/s 350 cfm min (165 L/s) Discharge Static Pressure Pa 199 Airflow 1-row coil maximum 2-row coil maximum Note: When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance. In. wg 0.80 174 0.70 150 0.60 125 0.50 100 0.40 75 0.
Pa In. wg 125 0.50 100 0.40 75 0.30 50 0.20 25 VPxF 03SQ—ECM 160 cfm min (76 L/s) Discharge Static Pressure Performance Data 0.10 100 47 200 300 400 500 600 700 800 900 1000 1100 Cfm 94 142 189 236 283 330 378 425 472 519 L/s Airflow Pa In. wg 125 0.50 100 0.40 75 0.30 50 0.20 25 0.10 200 VPxF 04SQ—ECM 1-row coil maximum 2-row coil maximum Notes: 1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency. 2.
Performance Data 0.50 100 0.40 75 0.30 50 0.20 25 0.10 400 600 800 1000 1200 1400 1600 1800 2000 2200 Cfm 189 283 378 472 566 661 755 850 944 1038 L/s 530 cfm min (250 L/s) In. wg 1-row coil maximum 2-row coil maximum Notes: 1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency. 2. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance.
Performance Data Table 13. Heating capacity (MBh) - fan sizes 03SQ–05SQ (I-P) Rows Water Pressure Gpm Drop (ft) Airflow (Cfm) 150 300 450 600 750 900 1.0 2.0 3.0 4.0 1-Row 5.0 Capacity 6.0 MBH 7.0 8.0 9.0 10.0 0.28 1.02 2.22 3.85 5.92 8.41 11.32 14.65 18.40 22.57 13.14 13.62 13.88 14.04 14.14 14.22 14.28 14.33 14.37 18.63 19.69 20.27 20.64 20.89 21.08 21.22 21.33 21.42 22.21 23.78 24.65 25.21 25.59 25.88 26.10 26.28 26.42 25.01 27.05 28.20 28.95 29.46 29.85 30.15 30.38 30.57 27.36 29.86 31.
Performance Data 4. Capacity based on 70°F entering air temperature and 180°F entering water temperature. Refer to correction factors for different entering conditions. 5. For premium coils (.020” wall), water side pressure drop increases 17% and water velocity increases 7% for fixed GPM. Table 15. Temperature correction factors for water pressure drop (ft) Average Water Temperature Correction Factor 200 0.970 190 0.985 180 1.000 170 1.020 160 1.030 150 1.050 140 1.080 130 1.100 120 1.130 110 1.
Performance Data Table 19. Heating capacity (kW) - fan sizes 06SQ & 07SQ (SI) Water Pressure Drop (kPa) 425 472 519 566 613 661 708 755 802 849 897 0.03 0.06 0.13 1-Row 0.19 Capacity 0.25 kW 0.32 0.38 0.44 0.33 1.09 3.71 7.68 12.92 19.39 27.04 35.84 9.43 10.29 10.78 11.10 11.32 11.48 9.85 10.77 11.31 11.66 11.91 12.09 10.24 11.23 11.82 12.20 12.47 12.67 10.60 11.66 12.30 12.71 13.01 13.23 10.94 12.06 12.75 13.20 13.52 13.76 11.26 12.46 13.19 13.67 14.02 14.27 11.57 12.84 13.61 14.13 14.
Performance Data Series Fan-Powered Terminal Units Table 22. Primary airflow control factory settings – I-P Control Type Direct Digital Control/UCM Pneumatic with Volume Regulator Air Valve Size (in.
Performance Data Table 24. Unit air pressure drop – in. wg (I-P) Fan/Inlet Size Airflow Cfm Unit 2SQ-04 200 225 0.03 0.03 2SQ-05 200 250 300 350 0.03 0.04 0.06 0.09 2SQ-06 200 300 400 500 0.03 0.06 0.12 0.19 200 400 550 700 0.01 0.05 0.10 0.16 200 400 550 700 0.01 0.02 0.06 0.11 250 300 400 500 0.10 0.15 0.34 0.45 250 500 700 900 0.05 0.16 0.31 0.49 250 550 850 1200 0.03 0.11 0.24 0.44 250 550 850 1200 0.01 0.07 0.16 0.32 330 400 450 500 0.16 0.29 0.35 0.
Performance Data Table 24. Unit air pressure drop – in. wg (I-P) (continued) Fan/Inlet Size Airflow Cfm Unit 04SQ-08 330 500 700 900 0.04 0.12 0.25 0.44 04SQ-10 330 700 1050 1400 0.02 0.12 0.29 0.54 Fan/Inlet Size Airflow Cfm Unit 7SQ-12 850 1200 1600 2000 0.01 0.02 0.12 0.27 7SQ-14 850 1550 2250 3000 0.01 0.07 0.27 0.59 7SQ-16 850 1550 2250 3000 0.01 0.07 0.27 0.59 Note: Unit pressure drops do not include hot water coil or attenuator pressure drops. Table 25.
Performance Data Table 27. Attenuator air pressure drop (SI) Fan Size Plenum L/s Attenuator 02SQ 24 71 165 260 354 448 0 1 4 12 24 40 03SQ 24 118 236 354 472 566 0 1 5 15 32 52 04SQ 24 142 283 425 566 708 0 5 18 36 59 88 Fan Size Plenum L/s Attenuator 05SQ 24 142 307 472 613 779 0 2 12 36 70 129 06SQ 24 236 425 613 802 991 0 1 4 16 42 90 07SQ 24 378 566 755 944 1133 0 3 12 34 75 144 Note: Plenum cfm = (Fan cfm) – (Min. valve cfm) Table 28.
Performance Data Table 29.
Series 02SQ—PSC Pa In. wg 150 0.60 125 0.50 100 0.40 75 0.30 50 0.20 25 0.10 0 0.00 100 190 cfm min (90 L/s) Discharge Static Pressure Performance Data 200 300 400 500 600 700 800 Cfm 94 142 189 236 283 330 378 L/s 47 Airflow 1-row coil maximum 2-row coil maximum Note: When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance. In. wg 0.80 174 0.70 150 0.60 125 0.50 100 0.40 75 0.30 50 0.20 25 0.
Performance Data Series 05SQ—PSC In. wg 0.80 174 0.70 150 0.60 125 0.50 100 0.40 75 0.30 50 0.20 25 0.10 0 0.00 400 cfm min (189 L/s) Discharge Static Pressure Pa 199 300 500 700 900 1100 1300 1500 1700 1900 2100 Cfm 142 236 330 425 519 614 708 802 897 991 L/s Airflow 1-row coil maximum 2-row coil maximum Note: When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance. In. wg 0.80 174 0.70 150 0.
Pa In. wg 125 0.50 100 0.40 75 0.30 50 0.20 25 0.10 0 VSxF Size 03SQ—ECM 200 cfm min (94 L/s) Discharge Static Pressure Performance Data 0.00 100 200 300 400 500 600 700 800 900 1000 1100 1200 Cfm 47 94 142 189 236 283 330 378 425 472 519 566 L/s Airflow 1-row coil maximum 2-row coil maximum Notes: 1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency. 2.
Performance Data 100 0.40 Minimum 1-row coil maximum 75 0.30 2-row coil maximum Notes: 1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency. 2. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance. 50 0.20 25 0.10 0 VSxF 06SQ—ECM 700 cfm min (330 L/s) In. wg 0.50 Discharge Static Pressure VSCF and VSEF maximum Pa 125 0.
Performance Data Table 32. Heating capacity (MBh) - fan size 05SQ (I-P) Rows Gpm Water Pressure Drop (ft) 350 500 650 800 1000 1200 1400 1600 1800 2000 2150 1-Row Capacity MBH 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 0.29 1.08 2.33 4.03 6.18 8.76 11.79 15.24 21.67 23.02 23.76 24.23 24.55 24.79 24.97 25.25 27.14 28.20 28.87 29.34 29.69 29.95 28.09 30.49 31.85 32.72 33.34 33.79 34.14 30.49 33.38 35.03 36.10 36.86 37.42 37.85 33.30 36.75 38.78 40.11 41.05 41.75 42.29 35.79 39.71 42.12 43.71 44.
Performance Data Table 35. Temperature correction factors for coil capacity (MBH) Entering Water Minus Entering Air Correction Factor 40 50 60 70 80 90 0.355 0.446 0.537 0.629 0.722 0.814 100 0.907 110 120 1.000 1.093 130 1.187 Table 36. Heating capacity (kW) - fan size 02SQ (SI) Rows L/s Water Pressure Drop (kPa) 71 94 118 142 165 189 212 236 260 283 330 1-Row Capacity kW 0.03 0.06 0.13 0.19 0.25 0.32 0.47 1.59 5.52 11.51 19.45 29.27 2.68 2.91 3.00 3.05 3.08 3.03 3.34 3.46 3.52 3.
Performance Data Table 38. Heating capacity (kW) - fan size 05SQ(SI) Rows L/s Water Pressure Drop (kPa) 165 236 307 378 472 566 661 755 849 944 1015 1-Row Capacity kW 0.06 0.13 0.19 0.25 0.32 0.38 0.44 0.50 0.87 3.22 6.95 12.04 18.46 26.20 35.23 45.57 6.35 6.75 6.96 7.10 7.19 7.26 7.32 7.40 7.95 8.26 8.46 8.60 8.70 8.78 8.23 8.94 9.33 9.59 9.77 9.90 10.01 8.94 9.78 10.27 10.58 10.80 10.97 11.09 9.76 10.77 11.37 11.76 12.03 12.24 12.40 10.49 11.64 12.34 12.81 13.14 13.39 13.58 11.
Performance Data Low Height Parallel Fan-Powered Terminal Units Table 42. Primary airflow control factory settings – I-P Air Valve Size (in.
Performance Data Table 45. Unit air pressure drop – Pa (SI) Inlet/Fan Size Airflow L/s Cooling Only Unit (Pa) Inlet/Fan Size Airflow L/s Cooling Only Unit (Pa) 08SQ-05 71 94 118 165 2 5 7 13 09SQ-08 189 283 378 425 2 21 40 51 08SQ-06 200 142 189 236 0.01 10 16 24 09SQ-8x14 330 519 708 897 26 63 116 185 08SQ-08 189 283 378 425 2 21 40 51 10SQ-08 189 283 378 425 2 23 45 59 09SQ-06 94 142 189 236 2 10 16 24 10SQ-8x14 345 475 565 685 47 91 131 195 Notes: 1.
Performance Data Performance Data Fan Curves Low-Height Parallel 08SQ—PSC 125 0.50 175 cfm min (83 L/s) Discharge Static Pressure Pa In. wg 150 0.60 100 0.40 75 0.30 50 0.20 25 0.10 150 71 200 250 300 350 400 450 500 550 Cfm 94 118 142 165 189 212 236 260 L/s Airflow Low-Height Parallel 09SQ—PSC Pa In. wg 199 0.80 174 0.70 150 0.60 125 0.50 100 0.40 75 0.30 50 0.20 25 0.
Performance Data LPxF 08SQ—ECM Pa In. wg 125 0.50 100 0.40 75 0.30 50 0.20 25 0.10 50 150 250 350 450 Cfm 24 71 118 165 212 L/s 1-row coil maximum 2-row coil maximum Notes: 1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency. 2. When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance. 100 cfm min (47 L/s) Minimum Discharge Static Pressure LPCF and LPEF maximum Pa In.
Performance Data Table 48. Heating capacity (MBh) - fan sizes 08SQ & 09SQ (I-P) Rows Gpm Water Pressure Drop (ft) 100 200 300 400 500 600 700 800 900 1-Row Capacity MBH 0.5 1.0 1.5 2.0 2.5 0.80 2.67 5.43 9.02 13.39 7.73 8.58 8.90 9.06 9.17 10.43 12.15 12.83 13.20 13.43 12.20 14.51 15.52 16.07 16.43 13.50 16.37 17.69 18.42 18.89 14.51 17.98 19.56 20.47 21.06 15.33 19.42 21.21 22.30 23.00 16.03 20.69 22.72 23.97 24.79 16.63 21.82 24.15 25.51 26.45 17.15 22.85 25.46 26.95 28.
Performance Data Table 51. Heating capacity (kW) - fan sizes 08SQ & 09SQ (SI) Rows L/s Airflow (L/s) Water Pressure Drop (kPa) 47 94 142 189 236 283 330 378 425 1-Row Capacity kW 0.03 0.06 0.09 0.13 0.16 2.39 7.98 16.24 26.97 40.04 2.27 2.51 2.61 2.66 2.69 3.06 3.56 3.76 3.87 3.94 3.58 4.25 4.55 4.71 4.81 3.96 4.80 5.18 5.40 5.54 4.25 5.27 5.73 6.00 6.17 4.49 5.69 6.22 6.54 6.74 4.70 6.06 6.66 7.03 7.27 4.87 6.40 7.08 7.48 7.75 5.03 6.70 7.46 7.90 8.21 2-Row Capacity kW 0.06 0.
Performance Data Low Height Series Fan-Powered Terminal Units Table 54. Primary airflow control factory settings-I-P Control Type Air Valve Size Maximum Valve (in.
Performance Data Table 56. Unit air pressure drop (continued) in. wg (I-P) Pa (SI 09SQ-08 400 600 750 900 0.08 0.24 0.40 0.61 09SQ-8x14 600 700 900 1050 10SQ-08 10SQ-8x14 09SQ-08 189 283 354 425 21 59 100 151 0.18 0.27 0.51 0.73 8x14-09SQ 283 330 425 495 44 66 126 182 400 600 800 0.08 0.38 0.84 10SQ-08 189 283 378 20 94 209 600 900 1100 1500 0.21 0.50 0.77 1.47 10SQ-8x14 283 425 519 708 51 124 191 367 Table 57. Coil air pressure drop in.
Pa In. wg 199 0.80 174 0.70 150 0.60 125 0.50 100 0.40 75 0.30 50 0.20 25 0.10 0 Low-Height Series 08SQ—PSC 170 cfm min (80 L/s) Discharge Static Pressure Performance Data 0.00 150 200 250 300 350 400 450 500 550 600 Cfm 71 94 118 142 165 189 212 236 260 283 L/s Airflow 1-row coil maximum 2-row coil maximum Note: When attenuator is required, add inlet attenuator pressure to discharge static pressure for final fan performance. In. wg 0.80 174 0.70 150 0.
Pa In. wg 125 0.50 100 0.40 75 0.30 50 0.20 25 0.10 0 LSxF 08SQ—ECM 100 cfm min (47 L/s) Discharge Static Pressure Performance Data 0.00 50 24 100 150 200 250 300 350 400 450 500 Cfm 47 71 94 118 142 165 189 212 236 L/s Airflow 1-row coil maximum 2-row coil maximum Notes: 1. ECMs (Electrically Commutated Motors) are ideal for systems seeking maximum motor efficiency. 2.
Performance Data Table 59. Heating capacity (MBh) - fan sizes 08SQ & 09SQ (I-P) Rows Gpm Water Pressure Drop (ft) 100 200 300 400 500 600 700 800 900 1000 1-Row Capacity MBH 1.0 2.0 3.0 4.0 5.0 6.0 0.15 0.58 1.27 2.24 3.48 4.98 7.92 8.08 8.17 8.24 11.16 11.48 11.69 11.83 13.45 13.94 14.25 14.47 15.34 15.98 16.39 16.69 16.97 17.76 18.28 18.65 18.42 19.36 19.99 20.43 19.73 20.82 21.54 22.06 20.92 22.16 22.98 23.58 22.01 23.39 24.32 24.99 23.02 24.54 25.57 26.
Performance Data Table 63. Heating capacity (kW) - fan size 08SQ & 09SQ (SI) Airflow (L/s) Rows L/s Water Pressure Drop (kPa) 47 94 142 189 236 283 330 378 425 472 1-Row Capacity kW 0.06 0.13 0.19 0.25 0.32 0.38 0.44 1.72 3.81 6.71 10.40 14.90 2.32 2.37 2.39 2.41 3.27 3.36 3.42 3.47 3.94 4.08 4.18 4.24 4.50 4.68 4.80 4.89 4.97 5.21 5.36 5.47 5.40 5.67 5.86 5.99 5.78 6.10 6.31 6.47 6.13 6.49 6.74 6.91 6.45 6.86 7.13 7.32 6.75 7.19 7.49 7.71 2-Row Capacity kW 0.06 0.13 0.19 0.
Electrical Data Parallel Fan-Powered Terminal Units Table 67. PSC motor units—electric coil kW guidelines – minimum to maximum (VPEF) Single-Phase Voltage Fan Size Stages Three-Phase Voltage 120V 208V 240V 277V 347V 480V 208V 480V 600V 380V/ 50Hz 02SQ 1 2 0.5-5.0 0.5-5.0 0.5-6.0 0.5-6.0 0.5-6.0 0.5-6.0 0.5-6.0 1.0-6.0 0.5-6.0 1.0-6.0 0.5-6.0 1.0-6.0 0.5-6.0 1.0-6.0 1.0-6.0 2.0-6.0 1.5-6.0 3.0-6.0 1.0-6.0 1.5-6.0 03SQ 1 2 0.5-5.0 0.5-5.0 0.5-9.0 0.5-9.0 0.5-10.0 0.5-10.0 0.5-11.
Electrical Data Table 69. Fan electrical performance (PSC) Notes: 1. Electric Heat Units - Units with fan sizes 02SQ to 05SQ and a primary voltage of 208/60/1, 208/60/3, or 240/60/1 have 115/60/1 VAC fan motors. Fan sizes 06SQ and 07SQ with the same voltages, have 208/60/1 VAC motors. 2. Electric Heat Units - Units with primary voltage of 277/60/1, 480/60/1 or 480/60/3 use 277 VAC fan motors. 3. Electric Heat Units - Units with primary voltage of 347/60/1 or 575/60/3 use 347 VAC fan motors. 4.
Electrical Data Table 72. Minimum unit electric heat L/s guidelines (PSC) L/s Unit kW 02SQ 03SQ 04SQ 05SQ 06SQ 07SQ 0.5 1 1.5 56 56 56 94 94 94 149 149 149 165 165 165 252 252 252 276 276 276 2 2.5 3 56 69 82 94 94 94 149 149 149 165 165 165 252 252 252 276 276 276 3.5 4 4.5 95 108 121 94 109 123 149 149 149 165 165 165 252 252 252 276 276 276 5 5.5 6 134 147 160 137 149 165 149 149 165 165 165 165 252 252 252 276 276 276 6.5 7 7.
Electrical Data Table 73. Minimum unit electric heat Cfm guidelines (ECM) (continued) Cfm Unit kW 03SQ 04SQ 05SQ 06SQ 11 12 13 630 - 630 690 745 630 690 745 693 738 782 14 15 16 - 810 - 810 860 920 826 871 915 17 18 - - 973 1030 - Table 74. Minimum unit electric heat L/s guidelines (ECM) L/s 62 Unit kW 03SQ 04SQ 05SQ 06SQ 0.5 1 1.5 94 94 94 149 149 149 165 165 165 264 264 264 2 2.5 3 94 94 94 149 149 149 165 165 165 264 264 264 3.5 4 4.
Electrical Data Series Fan-Powered Terminal Units Table 75. VSEF—electric coil kW guidelines – minimum to maximum (PSC motor units) Single-Phase Voltage Fan Size Stages Three-Phase Voltage 120V 208V 240V 277V 347V 480V 208V 480V 600V 380V/50Hz 02SQ 1 2 0.5-5.0 0.5-5.0 0.5-7.0 0.5-7.0 0.5-7.0 0.5-7.0 0.5-7.0 1.0-7.0 0.5-7.0 1.0-7.0 1.0-7.0 1.5-7.0 0.5-7.0 1.0-7.0 1.0-7.0 3.5-7.0(a) 1.5-7.0 - 1.5-7.0 2.5-7.0 03SQ 1 2 0.5-5.0 0.5-5.0 0.5-9.0 0.5-9.0 0.5-10.0 0.5-10.0 0.5-12.0 1.
Electrical Data Table 77. Fan electrical performance (PSC) 07SQ 1 - 6.6 4.7 Notes: 1. Electric Heat Units—Units with fan sizes 02SQ to 05SQ and a primary voltage of 208/60/1, 208/60/3 or 0/60/1 use 115/60/1 VAC fan motors. Fan sizes 06SQ and 07SQ in these same voltages, have 208/60/1 VAC fan motors. 2. Electric Heat Units—Units with primary voltage of 277/60/1, 480/60/1 or 480/60/3 use 277 VAC fan motors. 3. Electric Heat Units—Units with primary voltage of 347/60/1 or 575/60/3 use 347 VAC fan motors.
Electrical Data Table 80. Minimum unit electric Heat L/s Guidelines (PSC) Unit kW 02SQ 03SQ 04SQ 05SQ 06SQ 07SQ 0.5 1 1.5 90 90 90 123 123 123 149 149 149 189 189 189 330 330 330 401 401 401 2 2.5 3 90 90 101 123 123 123 149 149 149 189 189 189 330 330 330 401 401 401 3.5 4 4.5 112 122 133 123 123 123 149 149 149 189 189 189 330 330 330 401 401 401 5 5.5 6 144 154 165 137 149 165 149 149 165 189 189 189 330 330 330 401 401 401 6.5 7 7.
Electrical Data Table 81. Minimum unit electric Heat Cfm Guidelines (ECM) 66 Unit kW 03SQ 04SQ 05SQ 06SQ 0.5 1 1.5 260 260 260 315 315 315 400 400 400 943 943 943 2 2.5 3 260 260 260 315 315 315 400 400 400 943 943 943 3.5 4 4.5 260 260 260 315 315 315 400 400 400 943 943 943 5 5.5 6 290 315 350 315 315 350 400 400 400 943 943 943 6.5 7 7.
Electrical Data Table 82. Minimum unit electric Heat L/s Guidelines (ECM) Unit kW 03SQ 04SQ 05SQ 06SQ 0.5 1 1.5 123 123 123 149 149 149 189 189 189 445 445 445 2 2.5 3 123 123 123 149 149 149 189 189 189 445 445 445 3.5 4 4.5 123 123 123 149 149 149 189 189 189 445 445 445 5 5.5 6 137 149 165 149 149 165 189 189 189 445 445 445 6.5 7 7.
Electrical Data Low Height Parallel Fan-Powered Terminal Units Table 83. LPEF—electric coil kW guidelines – minimum to maximum (PSC motor units) Single-Phase Voltage Fan Size Stages Three-Phase Voltage 120V 208V 240V 277V 347V 480V 208V 480V 600V 380V/ 50Hz 08SQ 1 2 0.5-4.5 0.5-4.5 0.5-7.0 0.5-7.0 0.5-7.0 0.5-7.0 0.5-7.0 1.0-7.0 0.5-7.0 1.0-7.0 0.5-7.0 1.0-7.0 0.5-7.0 1.0-7.0 1.0-7.0 2.0-7.0 1.5-7.0 3.0-7.0 - 09SQ 1 2 0.5-4.5 0.5-4.5 0.5-8.0 0.5-8.0 0.5-10.0 0.5-10.0 0.5-12.
Electrical Data Table 87. Minimum unit electric heat guidelines Cfm (PSC) L/s (PSC) Unit kW 08SQ 09SQ 10SQ Unit kW 08SQ 09SQ 10SQ 0.5 1 1.5 173 173 173 440 440 440 720 720 720 0.5 1 1.5 82 82 82 208 208 208 340 340 340 2 2.5 3 173 173 173 440 440 440 720 720 720 2 2.5 3 82 82 82 208 208 208 340 340 340 3.5 4 4.5 202 232 261 440 440 440 720 720 720 3.5 4 4.5 95 109 123 208 208 208 340 340 340 5 5.5 6 290 319 349 440 440 440 720 720 720 5 5.
Electrical Data Low Height Series Fan-Powered Terminal Units Table 89. LSEF-electric coil kW guidelines-minimum to maximum (PSC motor units) Single-Phase Voltage Fan Size Stages Three-Phase Voltage 120V 208V 240V 277V 347V 480V 208V 480V 600V 380V/ 50Hz 08SQ 1 2 0.5-4.5 0.5-4.5 0.5-6.0 0.5-6.0 - 0.5-6.0 0.5-6.0 0.5-6.0 1.0-6.0 0.5-6.0 1.0-6.0 0.5-6.0 1.0-6.0 1.0-6.0 3.0-6.0 1.5-6.0 5.0-5.0 - 09SQ 1 2 0.5-4.5 0.5-4.5 0.5-8.0 0.5-8.0 0.5-10.0 0.5-10.0 0.5-12.0 1.0-12.0 0.5-12.
Electrical Data Table 93. Minimum unit electric heat guidelines (PSC) Cfm L/s Unit kW 08SQ 09SQ 10SQ Unit kW 08SQ 09SQ 10SQ 0.5 1 1.5 228 228 228 377 377 377 440 440 440 0.5 1 1.5 108 108 108 178 178 178 208 208 208 2 2.5 3 228 244 260 377 377 377 440 440 440 2 2.5 3 108 115 123 178 178 178 208 208 208 3.5 4 4.5 276 293 309 377 377 377 440 440 440 3.5 4 4.5 130 138 146 178 178 178 208 208 208 5 5.5 6 325 341 357 377 377 377 440 440 440 5 5.
Electrical Data Table 94. Minimum unit electric heat guidelines (ECM) Cfm 72 L/s Unit kW 08SQ 09SQ 10SQ Unit kW 08SQ 09SQ 10SQ 0.5 1 1.5 128 128 128 377 377 377 480 480 480 0.5 1 1.5 60 60 60 178 178 178 227 227 227 2 2.5 3 128 159 190 377 377 377 480 480 480 2 2.5 3 60 75 90 178 178 178 227 227 227 3.5 4 4.5 221 253 284 377 377 377 480 480 480 3.5 4 4.5 104 119 134 178 178 178 227 227 227 5 5.5 6 315 346 377 377 377 377 480 480 480 5 5.
Electrical Data Formulas Fan-Powered Parallel Minimum Circuit Ampacity (MCA) Equation MCA = 1.25 x ( motor amps + heater amps) Motor amps is the sum of all motor current draws if more than one is used in the unit. Maximum Overcurrent Protection (MOP) Equation MOP = (2.
Electrical Data Fan-Powered Series Minimum Circuit Ampacity (MCA) Equation • MCA = 1.25 x (Smotor amps + heater amps) Here motor amps is the sum of all motor current draws if more than one is used in the unit. Maximum Overcurrent Protection (MOP) Equation • MOP = (2.
Electrical Data Low Height Parallel Fan-Powered Minimum Circuit Ampacity (MCA) = (motor amps + heater amps) x 1.25 Maximum Overcurrent Protection (MOP) = (2.25 x motor amps) + heater amps General Sizing Rules: • If MOP = 15, then fuse size = 15 • If MOP = 19, then fuse size = 15 with one exception. If heater amps x 1.25 > 15, then fuse size = 20. • If MOP £ MCA, then choose next fuse size greater than MCA. • Control fusing not applicable.
Acoustics Data Parallel Fan-Powered Terminal Units Table 95. Discharge sound power (dB)1, 2, 4- valve only 0.5" Inlet Pressure 1.0" Inlet Pressure 1.5" Inlet Pressure 2.0" Inlet Pressure 3.
Acoustics Data Table 95. Discharge sound power (dB)1, 2, 4- valve only (continued) 0.5" Inlet Pressure 1.0" Inlet Pressure 1.5" Inlet Pressure 2.0" Inlet Pressure 3.
Acoustics Data Table 96. Radiated sound power (dB)1, 2, 4- valve only (continued) Inlet Fan Size Size (in) Cfm 02SQ 10 0.5" Inlet Pressure 1.0" Inlet Pressure 1.5" Inlet Pressure 2.0" Inlet Pressure 3.
Acoustics Data Table 96. Radiated sound power (dB)1, 2, 4- valve only (continued) Inlet Fan Size Size (in) Cfm 06SQ 07SQ 06SQ 07SQ 14 0.5" Inlet Pressure 1.0" Inlet Pressure 1.5" Inlet Pressure 2.0" Inlet Pressure 3.
Acoustics Data Table 97.
Acoustics Data Table 98. Sound noise criteria (NC) - fan only (continued) Fan-Only 06SQ 07SQ 06SQ ECM 0.25 0.25 0.25 920 434 18 37 1200 566 21 39 1400 661 23 42 1700 802 26 44 1960(a) 925 29 47 1050 496 18 37 1300 614 23 41 1500 708 25 44 1800 850 26 44 2020(a) 953 27 45 800 378 18 38 1100 519 22 39 1500 708 26 43 1800 850 29 45 2100 991 31 48 Notes: 1. “--” represents NC levels below NC 15. 2.
Acoustics Data Table 101. Sound noise criteria (NC) - valve only Discharge1,2,4 Inlet Fan Size Size (in) 02SQ 02SQ 02SQ 02SQ 03SQ 03SQ 04SQ 03SQ 04SQ 03SQ 04SQ 05SQ 04SQ 05SQ 82 5 6 8 10 6 8 10 12 14 Inlet Pressure CFM l/s 0.5” 1.0” 1.5” Radiated1,2,4 (Ps)3,5 Inlet Pressure (Ps)3,5 2.0” 3.0” 0.5” 1.0” 21 1.5” 2.0” 3.
Acoustics Data Table 101.
Acoustics Data Table 103.
Acoustics Data Series Fan-Powered Terminal Units Table 105. Discharge sound power (dB)- fan and 100% primary 0.5” Inlet Pressure Ps 1.0” Inlet Pressure Ps 2.0” Inlet Pressure Ps 3.
Acoustics Data Table 105. Discharge sound power (dB)- fan and 100% primary (continued) 0.5” Inlet Pressure Ps 1.0” Inlet Pressure Ps 2.0” Inlet Pressure Ps 3.
Acoustics Data Table 106. Radiated sound power (dB)1,2,4- fan and 100% primary (continued) 0.5” Inlet Pressure 1.0” Inlet Pressure 1.5” Inlet Pressure 2.0” Inlet Pressure 3.
Acoustics Data Table 107. Fan only sound power (dB) Discharge Lw (dB) Fan 02SQ 03SQ 04SQ 05SQ 06SQ 07SQ 03SQ ECM 88 Outlet SP 0.25 0.25 0.25 0.25 0.25 0.25 0.
Acoustics Data Table 107. Fan only sound power (dB) Fan 04SQ ECM 05SQ ECM 06SQ ECM Outlet SP 0.25 0.25 0.
Acoustics Data Table 108. Sound noise criteria (NC) fan and 100% primary (continued) Fan Size 05SQ 06SQ 07SQ 04SQ ECM 05SQ ECM 06SQ ECM Inlet Size (in) 12 16 16 12 14 16 Discharge Radiated Inlet Pressure (Ps) Inlet Pressure (Ps) CFM l/s 0.5” 1.0” 2.0” 3.0” 0.5” 1.0” 2.0” 3.0” 400 189 -- -- -- -- 24 27 1.
Acoustics Data Table 110. AHRI 885-2008 radiated transfer function assumptions: Octave Band Type 2- Mineral Fiber Insulation Total dB reduction 2 3 4 5 6 7 -18 -18 -19 -19 -20 -20 -26 -26 -31 -31 -36 -36 Notes: Subtract from terminal unit sound power to determine radiated sound pressure in the space. 1. NC Values are calculated using modeling assumptions based on AHRI 885-2008. 2. Where DPs is inlet static pressure minus discharge static pressure. 3.
Acoustics Data Low Height Parallel Fan-Powered Terminal Units Table 114. Discharge sound power (dB)1,2,4 Inlet Fan Size Size (in) Cfm l/s 08SQ 5 0.5” Inlet Pressure 1.0” Inlet Pressure 1.5” Inlet Pressure 2.0” Inlet Pressure 3.
Acoustics Data Table 115. Radiated sound power (dB)1,2,4 Inlet Fan Size Size (in) Cfm l/s 08SQ 5 0.5” Inlet Pressure 1.0” Inlet Pressure 1.5” Inlet Pressure 2.0” Inlet Pressure 3.
Acoustics Data Table 116. Fan only sound power (dB) Discharge Lw (dB) Fan 08SQ 09SQ 10SQ 08SQ ECM 09SQ ECM Outlet SP 0.25 0.25 0.25 0.25 0.
Acoustics Data Table 118. AHRI 885-2008 radiated transfer function assumptions: Octave Band Type 2- Mineral Fiber Insulation Total dB reduction 2 3 4 5 6 7 -18 -18 -19 -19 -20 -20 -26 -26 -31 -31 -36 -36 Notes: Subtract from terminal unit sound power to determine radiated sound pressure in the space. 1. NC Values are calculated using modeling assumptions based on AHRI 885-2008. 2. Where DPs is inlet static pressure minus discharge static pressure. 3.
Acoustics Data Table 120. Sound noise criteria (NC) - fan only Fan-Only 0.25” Disch. Pres. Fan 08SQ 09SQ 10SQ 08SQ ECM 09SQ ECM Outlet SP 0.25 0.25 0.25 0.25 0.
Acoustics Data Table 122. Radiated sound power (dB)-fan only (AHRI conditions) Fan Size Inlet Size Cfm L/s 2 3 4 5 6 7 50 08SQ 5, 6, 8 460 217 76 66 69 63 55 09SQ 6, 8, 8x14 900 425 77 74 72 69 60 53 10SQ 8, 8x14 1420 670 76 72 67 64 60 58 Notes: 1. All sound data rated in accordance with current Industry Standard AHRI 880-2011. 2. All sound power levels, dB re: 10-12 Watts. Table 123.
Acoustics Data Low Height Series Fan-Powered Terminal Units Table 126. Discharge sound power (dB) Inlet Fan Size Size (in) 08SQ 8 09SQ 8x14 10SQ 8x14 08SQ ECM 8 09SQ 8x14 ECM 10SQ 8x14 ECM 0.5” Inlet Pressure Ps 1.0” Inlet Pressure Ps 2.0” Inlet Pressure Ps 3.
Acoustics Data Table 127. Radiated sound power (dB)1,2,4 Inlet Fan Size Size (in) Cfm 170 08SQ 09SQ 10SQ 8 8 x 14 8 x 14 0.5” Inlet Pressure 1.0” Inlet Pressure 1.5” Inlet Pressure 2.0” Inlet Pressure 3.
Acoustics Data Table 128. Fan only sound power (dB) Discharge Lw (dB) Fan 08SQ 09SQ 10SQ 08SQ ECM 09SQ ECM 10SQ ECM Outlet SP 0.25 0.25 0.25 0.25 0.25 0.
Acoustics Data Table 129. Sound noise criteria (NC) - fan and 100% primary Fan Size 08SQ 09SQ 10SQ 08SQ ECM 09SQ ECM 10SQ ECM Inlet Size (in) 8 8x14 8x14 8 8x14 8x14 Discharge Radiated Inlet Pressure (Ps) Inlet Pressure (Ps) CFM l/s 0.5” 1.0” 2.0” 3.0” 0.5” 1.0” 2.0” 3.0” 170 80 -- -- 15.6 18.0 18.7 21.4 32.0 33.
Acoustics Data Table 131. AHRI 885-2008 radiated transfer function assumptions: Octave Band Type 2- Mineral Fiber Insulation Total dB reduction 2 3 4 5 6 7 -18 -18 -19 -19 -20 -20 -26 -26 -31 -31 -36 -36 Notes: Subtract from terminal unit sound power to determine radiated sound pressure in the space. 1. NC Values are calculated using current Industry Standard AHRI 885-2008. Radiated Transfer Function obtained from Appendix E, Type 2Mineral Fiber Insulation. 2.
Dimensional Data Parallel Fan-Powered Terminal Units PARALLEL COOLING ONLY (VPCF) FAN SIZE 02SQ 03SQ 04SQ 05SQ 06SQ 07SQ INLET SIZE AVAILABILITY (NOMINAL Ø") 5", 6", 8", 10" 6", 8", 10", 12" 8", 10", 12", 14" 10", 12", 14" 10", 12", 14", 16" 10", 12", 14", 16" INLET SIZE AVAILABILITY (NOMINAL Ømm) 127 mm, 152 mm, 203 mm, 254 mm 152 mm, 203 mm, 254 mm, 305 mm 203 mm, 254 mm, 305 mm, 356 mm 254 mm, 305 mm, 356 mm 254 mm, 305 mm, 356 mm, 406 mm 254 mm, 305 mm, 356 mm, 406 mm H W UNIT WT WT LBS (kg) 78 (35
Dimensional Data PARALLEL HOT WATER (VPWF) FAN SIZE 02SQ 03SQ 04SQ 05SQ 06SQ 07SQ INLET SIZE AVAILABILITY (NOMINAL Ø") 5", 6", 8", 10" 6", 8", 10", 12" 8", 10", 12", 14" 10", 12", 14" 10", 12", 14", 16" 10", 12", 14", 16" INLET SIZE AVAILABILITY (NOMINAL Ømm) 127 mm, 152 mm, 203 mm, 254 mm 152 mm, 203 mm, 254 mm, 305 mm 203 mm, 254 mm, 305 mm, 356 mm 254 mm, 305 mm, 356 mm 254 mm, 305 mm, 356 mm, 406 mm 254 mm, 305 mm, 356 mm, 406 mm H W UNIT WT WT LBS (kg) 78 (35) 96 (43) 97 (44) 111 (50) 20.
Dimensional Data PARALLEL WITH HOT WATER ON DISCHARGE (VPWF) FAN SIZE 02SQ 03SQ 04SQ 05SQ 06SQ 07SQ INLET SIZE AVAILABILITY (NOMINAL Ø") 5", 6", 8", 10" 6", 8", 10", 12" 8", 10", 12", 14" 10", 12", 14" 10", 12", 14", 16" 10", 12", 14", 16" INLET SIZE AVAILABILITY (NOMINAL Ømm) 127 mm, 152 mm, 203 mm, 254 mm 152 mm, 203 mm, 254 mm, 305 mm 203 mm, 254 mm, 305 mm, 356 mm 254 mm, 305 mm, 356 mm 254 mm, 305 mm, 356 mm, 406 mm 254 mm, 305 mm, 356 mm, 406 mm H W UNIT WT WT LBS (kg) 78 (35) 96 (43) 97 (44) 11
Dimensional Data 106 VAV-PRC012-EN
Dimensional Data VAV-PRC012-EN 107
Dimensional Data PARALLEL ELECTRIC HEAT (VPEF) FAN SIZE 02SQ 03SQ 04SQ 05SQ 06SQ 07SQ INLET SIZE AVAILABILITY (NOMINAL Ø") 5", 6", 8", 10" 6", 8", 10", 12" 8", 10", 12", 14" 10", 12", 14" 10", 12", 14", 16" 10", 12", 14", 16" INLET SIZE AVAILABILITY (NOMINAL Ømm) 127 mm, 152 mm, 203 mm, 254 mm 152 mm, 203 mm, 254 mm, 305 mm 203 mm, 254 mm, 305 mm, 356 mm 254 mm, 305 mm, 356 mm 254 mm, 305 mm, 356 mm, 406 mm 254 mm, 305 mm, 356 mm, 406 mm H W UNIT WT WT LBS (kg) 120 (54) 96 (43) 138 (63) 141 (64) 20.
Dimensional Data Series Fan-Powered Terminal Units SERIES COOLING ONLY (VSCF) WITHOUT ATTENUATOR INLET SIZE INLET SIZE DISCHARGE DIMENSIONS FAN AVAILABILITY AVAILABILITY L H W C D SIZE NOMINAL Ø NOMINAL Ø B A INCHES (mm) 02SQ 4, 5, 6, 8, 10 104, 127, 152, 203, 254 15.50" (394 mm) 22.00" (559 mm) 34.00" (864 mm) 12.00" (305 mm) 14.00" (356 mm) 5.00" (127 mm) .65" (17 mm) 03SQ 152, 203, 254, 305 6, 8, 10, 12 17.50" (445 mm) 24.00" (610 mm) 40.00" (1016 mm) 19.00" (483 mm) 16.00" (406 mm) 2.50" (64 mm) .
Dimensional Data 110 VAV-PRC012-EN
Dimensional Data NARROW CORRIDOR DESIGN SERIES COOLING (VSCF) WITHOUT ATTENUATOR NOTES: 1. Allow a minimum 6" (152 mm) plenum inlet clearance for unducted installations. 2. See installation Documents for exact hanger bracket location. 3. Air valve centered between top and bottom panel. 4. For Motor access, remove bottom screw on hanger brackets to slide panel as shown in drawing. 5. Attenuator option not available with this unit layout. 6.
Dimensional Data 112 VAV-PRC012-EN
Dimensional Data SERIES HOT WATER (VSWF) WITHOUT ATTENUATOR INLET SIZE INLET SIZE DISCHARGE DIMENSIONS Unit Wt FAN AVAILABILITY AVAILABILITY L H W Lbs E C D SIZE NOMINAL Ø NOMINAL Ø B A (kg) INCHES (mm) 5.00" (127 mm) 14.00" (356 mm) 02SQ 4, 5, 6, 8, 10 104, 127, 152, 203, 254 15.50" (394 mm) 22.00" (559 mm) 34.00" (864 mm) 12.00" (305 mm) .65" (17 mm) 6.75" (171 mm) 78 (35) 03SQ 6, 8, 10, 12 152, 203, 254, 305 17.50" (445 mm) 24.00" (610 mm) 40.00" (1016 mm) 19.00" (483 mm) 16.00" (406 mm) 2.50" (64 mm) .
Dimensional Data 114 VAV-PRC012-EN
Dimensional Data NARROW CORRIDOR DESIGN SERIES HOT WATER (VSWF) WITHOUT ATTENUATOR NOTES: 1. Allow a minimum 6" (152 mm) plenum inlet clearance for unducted installations. 2. See Installation Documents for exact hanger bracket location. 3. Air valve centered between top and bottom panel. 4. For motor access, remove bottom screw on hanger brackets to slide panel as shown in drawing. 5. Attenuator option not available with this unit layout. 6. Heating coil un-insulated.
Dimensional Data 116 VAV-PRC012-EN
Dimensional Data COIL INFORMATION FOR SERIES 1-ROW COIL VAV-PRC012-EN 117
Dimensional Data COIL INFORMATION FOR SERIES 2-ROW COILS 118 VAV-PRC012-EN
Dimensional Data SERIES ELECTRIC (VSEF) WITHOUT ATTENUATOR INLET SIZE INLET SIZE DISCHARGE DIMENSIONS FAN AVAILABILITY AVAILABILITY H W L E D SIZE NOMINAL Ø C NOMINAL Ø A B (mm) INCHES 02SQ 4, 5, 6, 8, 10 104, 127, 152, 203, 254 15.50" (394 mm) 22.00" (559 mm) 34.00" (864 mm) 12.00" (305 mm) 10.00" (254 mm) 5.00" (127 mm) 18.00" (457 mm) 18.50" (470 mm) 17.50" (445 mm) 24.00" (610 mm) 40.00" (1016 mm) 03SQ 6, 8, 10, 12 152, 203, 254, 305 12.00" (305 mm) 4.
Dimensional Data 120 VAV-PRC012-EN
Dimensional Data VAV-PRC012-EN 121
Dimensional Data 122 VAV-PRC012-EN
Dimensional Data Low Height Parallel Fan-Powered Terminal Units LOW-HEIGHT PARALLEL COOLING (LPCF) FAN SIZES 08SQ & 09SQ INLET SIZE UNIT WT INLET SIZE DISCHARGE DIMENSIONS FAN AVAILABILITY AVAILABILITY WT LBS H W L D SIZE NOMINAL Ø (INCHES) NOMINAL Ø (mm) (kg) A B 08SQ 11.00" (279 mm) 40.00" (1016 mm) 30.00" (762 mm) 19.25" (489 mm) 9.5" (241 mm) 4.00" (102 mm) 69 (31.3) 5, 6, 8 127, 152, 203 09SQ 74 (33.6) 6, 8 152, 203 09SQ 3.25" (83 mm) 83 (37.7) 203 x 356 8 x 14 Optional Attenuator Field Installed 5.
Dimensional Data LOW-HEIGHT PARALLEL COOLING (LPCF) FAN SIZE 10SQ INLET SIZE INLET SIZE FAN AVAILABILITY AVAILABILITY SIZE NOMINAL Ø (INCHES) NOMINAL Ø (mm) 10SQ 203 8 8 x 14 10SQ 203 x 356 UNIT WT WT LBS (kg) 11.50" (292 mm) 40.00" (1016 mm) 50.00" (1270 mm) 19.25" (489 mm) 10.00" (254 mm) 4.00" (102 mm) 90 (41) 3.25" (83 mm) 92 (42) H W DISCHARGE DIMENSIONS L B A D 4. 6. Actuator, Controller and Fan Controls located in this area 20.00" (508 mm) 20.
Dimensional Data LOW-HEIGHT PARALLEL HOT WATER (LPWF) FAN SIZES 08SQ & 09SQ INLET SIZE INLET SIZE UNIT WT DISCHARGE DIMENSIONS FAN AVAILABILITY AVAILABILITY WT LBS H W L D SIZE NOMINAL Ø (INCHES) NOMINAL (kg) Ø (mm) A B 08SQ 11.00" (279 mm) 40.00" (1016 mm) 30.00" (762 mm) 19.25" (483 mm) 9.50" (241 mm) 4.00" (102 mm) 98 (44.5) 5, 6, 8 127, 152, 203 103 (46.7) 09SQ 6, 8 152, 203 09SQ 3.25" (83 mm) 112 (50.8) 203 x 356 8 x 14 Optional Attenuator Field Installed 5. 5.
Dimensional Data 126 VAV-PRC012-EN
Dimensional Data PARALLEL LOW-HEIGHT HOT WATER (LPWF) COIL ON DISCHARGE FAN SIZES 08SQ & 09SQ INLET SIZE AVAILABILITY NOMINAL Ø (mm) INLET SIZE AVAILABILITY NOMINAL Ø (INCHES) FAN SIZE DISCHARGE DIMENSIONS H L W D A B 20.00" (508 mm) 10.00" (254 mm) UNIT WT WT LBS (kg) 08SQ 5, 6, 8 127, 152, 203 09SQ 6, 8 152, 203 103 (46.7) 09SQ 8 X 14 203 X 356 3.25" (83 mm) 112 (50.8) 11.00" (279 mm) 40.00" (1016 mm) 30.00" (762 mm) 4.00" (102 mm) 98 (44.
Dimensional Data Coil Information For Low Height Parallel Inlet-1 Row Size Inlet/Fan Coil Connection 1-Row A B L H 08SQ 3/8" (10 mm) O.D. 9" (229 mm) 2 7/8" (71 mm) 20" (508 mm) 10" (254 mm) 09SQ 3/8" (10 mm) O.D. 9" (229 mm) 2 7/8" (71 mm) 20" (508 mm) 10" (254 mm) 10SQ .375" (10 mm) O.D. 9.00" (229 mm) 2.80" (71 mm) 20.00" (508 mm) 10.00" (254 mm) L OUTLET A AIR FLOW H AIR FLOW INLET B 7/8" [22mm] Fan Size Internal Volume Gal (L) Operating Weight Lbs (Kg) 08SQ 0.
Dimensional Data Coil Information For Low Height Parallel Plenum Inlet 2-Row Coil Fan Size Coil Connection 2 Row A B L H 08SQ 7/8" (22 mm) O.D. 6 1/4" (157 mm) 2 1/8" (55 mm) 20" (508 mm) 10" (254 mm) 09SQ 7/8" (22 mm) O.D. 6 1/4" (157 mm) 2 1/8" (55 mm) 20" (508 mm) 10" (254 mm) 10SQ .875" (22 mm) O.D. 6.20" (157 mm) 2.18" (55 mm) 20.00" (508 mm) 10.00" (254 mm) Fan Size Internal Volume Gal (L) Operating Weight Lbs (Kg) 08SQ 0.16 (39.0) 13.7 (6.2) 09SQ 0.16 (39.0) 13.7 (6.
Dimensional Data Coil Information For Low Height Parallel Discharge 1-Row Coil Fan Size Coil Connection A B L H W 08SQ 3/8" (10 mm) O.D. 9.00" (229 mm) 1.65" (42 mm) 20.00" (508 mm) 10.00" (254 mm) 6.75" (171 mm) 09SQ 3/8" (10 mm) O.D. 9.00" (229 mm) 1.65" (42 mm) 20.00" (508 mm) 10.00" (254 mm) 6.75" (171 mm) Fan Size Internal Volume Gal (L) Operating Weight Lbs (Kg) 08SQ 0.07 (.28) 9.7 (4.4) 09SQ 0.07 (.28) 9.7 (4.4) Notes: 1.
Dimensional Data Coil Information For Low Height Parallel Discharge 2 Row Coil Fan Size Coil Connection A B L H W 08SQ 7/8" (22 mm) O.D. 6.25" (159 mm) 2.00 (51 mm) 20.00" (508 mm) 10.00" (254 mm) 6.75" (171 mm) 09SQ 7/8" (22 mm) O.D. 6.25" (159 mm) 2.00 (51 mm) 20.00" (508 mm) 10.00" (254 mm) 6.75" (171 mm) Fan Size Internal Volume Gal (L) Operating Weight Lbs (Kg) 08SQ 0.17 (.64) 13.7 (6.2) 09SQ 0.17 (.64) 13.7 (6.2) Notes: 1.
Dimensional Data LOW-HEIGHT PARALLEL ELECTRIC HEAT (LPEF) FAN SIZES 08SQ & 09SQ INLET SIZE INLET SIZE FAN AVAILABILITY AVAILABILITY SIZE NOMINAL Ø (INCHES) NOMINAL Ø (mm) 08SQ 09SQ 5, 6, 8 6, 8 127, 152, 203 09SQ 8 x 14 203 x 356 152, 203 UNIT WT WT LBS D (kg) A B 11.00" (279 mm) 40.00" (1016 mm) 30.00" (762 mm) 19.00" (483 mm) 9.50" (241 mm) 4.00" (102 mm) 104 (47.2) 109 (49.4) DISCHARGE DIMENSIONS H W L 3.25" (83 mm) 118 (53.5) Optional Attenuator Field Installed 5. 5.
Dimensional Data LOW-HEIGHT PARALLEL ELECTRIC (LPEF) FAN SIZE 10SQ VAV-PRC012-EN 133
Dimensional Data Low Height Series Fan-Powered Terminal Units LOW-HEIGHT SERIES COOLING ONLY (LSCF) FAN SIZES 08SQ & 09SQ INLET SIZE INLET SIZE DISCHARGE DIMENSIONS AVAILABILITY D AVAILABILITY W L H B A NOMINAL Ø (inches) NOMINAL Ø (mm) 08SQ 5, 6, 8 127, 152, 203 11.00" (279 mm) 26.00" (660 mm) 40.00" (1016 mm) 18.00" (457 mm) 10.00" (254 mm) 4.00" (102 mm) 152, 203 09SQ 6, 8 4.50" (114 mm) 203 x 355 09SQ 8 x 14 FAN SIZE Unit Wt Lbs (kg) 86 (39) 96 (44) 105 (47) Optional Attenuator Field Installed 4.
Dimensional Data LOW-HEIGHT SERIES COOLING (LSCF) FAN SIZE 10SQ UNIT WT INLET SIZE INLET SIZE DISCHARGE DIMENSIONS FAN WT LBS AVAILABILITY AVAILABILITY H W L C D SIZE NOMINAL (kg) Ø (INCHES) NOMINAL Ø (mm) A B 10SQ 11.00" (279 mm) 48.00" (1219 mm) 36.00" (914 mm) 38.00" (965 mm) 10.00" (254 mm) 4.00" (102 mm) 20.00" (508 mm) 120 (54) 203 8 10SQ 8 x 14 17.50" (445 mm) 130 (59) 203 x 356 Optional Attenuator Field Installed Optional Attenuator Field Installed 2. 8.
Dimensional Data LOW-HEIGHT SERIES HOT WATER (LSWF) FAN SIZES 08SQ & 09SQ INLET SIZE INLET SIZE DISCHARGE DIMENSIONS AVAILABILITY AVAILABILITY D H W L NOMINAL Ø (INCHES) NOMINAL Ø (mm) B A 5, 6, 8 08SQ 11.00" (279 mm) 26.00" (660 mm) 40.00" (1016 mm) 18.00" (457 mm) 10.00" (254 mm) 4.00" (102 mm) 127, 152, 203 6, 8 152, 203 09SQ 4.50" (114 mm) 8 x 14 203 x 355 09SQ FAN SIZE Unit Wt Lbs (kg) 95 (43) 105 (48) 114 (52) Optional Attenuator Field Installed 4.
Dimensional Data LOW-HEIGHT SERIES HOT WATER (LSWF) FAN SIZE 10SQ INLET SIZE INLET SIZE DISCHARGE DIMENSIONS FAN AVAILABILITY AVAILABILITY H W L C D SIZE NOMINAL Ø (INCHES) NOMINAL Ø (mm) A B 11.00" (279 mm) 48.00" (1219 mm) 36.00" (914 mm) 38.00" (965 mm) 10.00" (254 mm) 4.00" (102 mm) 20.00" (508 mm) 10SQ 8 203 10SQ 8 x 14 203 x 356 17.50" (445 mm) UNIT WT WT LBS (kg) 136 (62) 146 (66) Optional Attenuator Field Installed Optional Attenuator Field Installed 2. 8. 8.
Dimensional Data 138 VAV-PRC012-EN
Dimensional Data VAV-PRC012-EN 139
Dimensional Data LOW-HEIGHT SERIES ELECTRIC HEAT (LSEF) FAN SIZES 08SQ & 09SQ INLET SIZE INLET SIZE Unit Wt DISCHARGE DIMENSIONS Lbs W AVAILABILITY AVAILABILITY L H D B (kg) A NOMINAL Ø (mm) NOMINAL Ø (INCHES) 5, 6, 8 127, 152, 203 08SQ 11.00" (279 mm) 26.00" (660 mm) 40.00" (1016 mm) 14.00" (356 mm) 9.00" (229 mm) 4.00" (102 mm) 101 (45.8) 6, 8 152, 203 09SQ 111 (50.3) 4.50" (114 mm) 120 (54.4) 8 x 14 203 x 355 09SQ FAN SIZE Optional Attenuator Field Installed 4.
Dimensional Data LOW-HEIGHT SERIES ELECTRIC (LSEF) FAN SIZE 10SQ INLET SIZE INLET SIZE DISCHARGE DIMENSIONS AVAILABILITY AVAILABILITY C D H W L NOMINAL Ø (INCHES) NOMINAL Ø (mm) A B 8 10SQ 203 11.00" (279 mm) 48.00" (1219 mm) 36.00" (914 mm) 19.00" (483 mm) 9.50" (241 mm) 4.00" (102 mm) 20.00" (508 mm) 17.50" (445 mm) 203 x 356 8 x14 10SQ FAN SIZE UNIT WT WT LBS (kg) 145 (65.8) 155 (70.3) Optional Attenuator Field Installed Optional Attenuator Field Installed 2. 8. 8.
Mechanical Specifications: Fan-Powered MODELS: VPCF, VPWF, VPEF, VSCF, VSWF, VSEF, LPCF, LPWF, LPEF, LSCF, LSWF, & LSEF VP, LP = Parallel Fan Powered Units VS, LS = Series Fan Powered Units Note: L = Low Height Model Break Downs • VPCF, VSCF, LPCF, & LSCF = Cooling Only • VPWF, VSWF, LPWF, & LSWF = With Hot Water Coil • VPEF, VSEF, LPEF, & LSEF = With Electric Coil CASING 22-gage galvanized steel.
Mechanical Specifications: Fan-Powered taps for measuring +/-5% of unit cataloged airflow. An airflow-versus-pressure differential calibration chart is provided.The damper blade is constructed of a closed-cell foam seal that is mechanically locked between two 22-gage galvanized steel disks.The damper blade assembly is connected to a cast zinc shaft supported by self-lubricating bearings.The shaft is cast with a damper position indicator.The valve assembly includes a mechanical stop to prevent overstroking.
Mechanical Specifications: Fan-Powered Outlet Connection Flanged Connection—Rectangular opening on unit discharge to accept 90° flanged ductwork connection. Filter A 1" (25 mm) filter is provided on the plenum inlet and attaches to the unit with a filter frame. Hot Water Coil Parallel Water Coils—. factory- installed on the plenum inlet.The coil has 1-row with 144 aluminum-plated fins per foot (.305 m), and if needed 2-row with 144 aluminum-plated fins per foot (.305 m).
Mechanical Specifications: Fan-Powered position set points. For a parallel unit, the controller will intermittently start the fan upon a call for heat. Upon a further call for heat, reheat is enabled. 1. Primary Airflow—The fan energizes when primary airflow drops below the fan setpoint airflow. The fan automatically starts when the zone temperature drops to the heating temperature setpoint. 2.
Mechanical Specifications: Fan-Powered Pneumatic Controls Normally Open Actuator—. Pneumatic 3 - 8 psig (20 - 55 kPa) spring-range pneumatic actuator. 3011 Pneumatic Volume Regulator (PVR)—. The regulator is a thermostat reset velocity controller, which provides consistent air delivery within 5% of cataloged flow down to 18% of unit cataloged cfm, independent of changes in system static pressure. Factory-calibrated, fieldadjustable setpoints for minimum and maximum flows.
DDC Controls Control Logic DDC controllers are today’s industry standard. DDC controllers provide system-level data used to optimize system performance. Variables such as occupied/unoccupied status, minimum and maximum airflow setpoints, temperature and temperature setpoints, valve position, fan status (on or off, and mode of operation: series or parallel), reheat status (on or off), box type and air valve size, temperature correction offsets, flow correction values, ventilation fraction, etc.
DDC Controls Figure 6. Flow sensor signal vs. airflow delivery 5 Flow Sensor DP (In. wg) 1 4" 5" 6" 8" 10" 12" 14" 16" 0.1 0.01 10 100 1,000 10,000 Cfm Note: Flow sensor DP (in. wg) is measured at the flow ring to aid in system balancing and commissioning. See “Valve/Controller Airflow Guidelines” in each section for unit performance. DDC Remote Heat Control Options When heat is added to the primary air atVAV unit before it enters zone, the air is said to be reheated.
DDC Controls Series-configured fan-powered terminal units utilize continuous fan operation during all occupied settings and while unoccupied when minimum airflows are being enforced. When the zone temperature falls below the active heating setpoint, the UCM modulates the primary airflow to the minimum heating airflow setpoint. The water valve opens as space temperature drops below the heating setpoint.
DDC Controls DD00—Available for all VariTrane Units (Trane actuator for field-installed DDC controls) A unit controller is not provided.The air damper actuator is provided with an integral screw terminal block. The fan contactor (fan-powered units), 24-VAC control power transformer (optional for single- and dual-duct units), and factory-installed electric heater contactor wires are attached to the outside of the unit for field connection of controls.
DDC Controls Available on all VariTrane Units FM00 – Customer-supplied actuator and DDC controller factory-installed. FM01 –Trane actuator and customer-supplied DDC controller factory-installed All customer furnished controllers and actuators are installed and wired per control manufacturer's specifications. Metal control enclosure is standard.
DDC Controls Tracer™ UC400 and UC210 Programmable BACnet Controllers Introduction TheTracer UC400 and UC210 controllers are programmable general purpose BACnet, microprocessor-based, Direct Digital Controllers (DDC). When factory installed onTrane (Variable Air Volume) VAV terminal units, it is factory downloaded with appropriate VAV programs and configuration settings.Trane VAV units have been made with either pneumatic, analog electronic, or microprocessor controls (DDC VAV).
DDC Controls • Pressure-independent (PI) operation that automatically adjusts valve position to maintain required airflow. In certain low-flow situations or in cases where the flow measurement has failed, the DDC controller will operate in a pressure-dependent (PD) mode of operation. • When combined with the patentedTrane Flow ring and pressure transducer, flow is repeatable to +/- 5% accuracy across the Pressure Independent (PI) flow range. (See Valve/Controller Airflow Guidelines section).
DDC Controls complete, the sensors have not been installed. In this case, the primary valve drives open using the heat of the main AHU to keep plumbing lines from freezing. When available, the operation of the VAV unit fan (series or parallel) remains unaffected. Controller Flexibility • 24 VAC binary input that can be configured as a generic input or as occupancy input. When the DDC controller is operating withTracer™ SC, the status of the input is provided toTracer SC for its action.
DDC Controls Figure 7. Flow sensor single vs. airflow delivery 5 Flow Sensor DP (In. wg) 1 4" 5" 6" 8" 10" 12" 14" 16" 0.1 0.01 10 100 1,000 10,000 Cfm Note: Flow sensor DP (in. wg) is measured at the flow ring to aid in system balancing and commissioning. See “Valve/Controller Airflow Guidelines” in each section for unit performance. Space Temperature Control Space temperature control applications are whereTrane emerged as an industry leader in quality and reliability.
DDC Controls When heat is added to the primary air, the air is considered reheated. Reheat can be either local (integral to theVAV unit in the form of an electric coil or hot water coil) or remote (typically existing wall fin radiation, convector, etc.) or any combination of local and remote.The operating characteristics of the four basic types of VariTrane DDC terminal reheat are discussed. Fan-Powered Terminal Units: On/Off Hot Water Reheat One or two stages of on/off hot water reheat are available.
DDC Controls and is de-energized when the space temperature is 0.5°F (0.28°C) below the active heating setpoint. When reheat is de-energized, the cooling minimum airflow setpoint is activated. Fan-powered Terminal Units: Pulse-Width Modulation of Electric Heat One or two stages of pulse-width modulation of electric heat are available. Energizing for a portion of a three-minute time period modulates the electric heater.
DDC Controls • Hospital operating rooms • Hospital patient rooms • Research and Development facilities • And many more… The CFM offset is assured and can be monitored and documented when connected to aTrane Tracer™ SC Building Automation System. FlowTracking Control is designed to meet most pressurization control projects. If an application calls for pressure control other than flow tracking, contact your localTrane Sales Office for technical support. Figure 8.
DDC Controls Specifications Supply Voltage 24 VAC, 50/60 Hz Maximum VA Load No Heat or Fan 8 VA (Board,Transducer, Zone Sensor, and Actuator) Note: If using field-installed heat, 24 VAC transformer should be sized for additional load. Output Ratings Actuator Output:24 VAC at 12 VA 1st Stage Reheat:24 VAC at 12 VA 2nd Stage Reheat:24 VAC at 12 VA 3rd Stage Reheat:24 VAC at 12 VA Binary Input 24 VAC, occupancy or generic. Auxiliary Input Can be configured for discharge or primary air temperature sensor.
DDC Controls Trane LonMark DDC VAV Controller Introduction This LonMark™ certified controller uses the Space Comfort Controller (SCC) profile to exchange information over a LonTalk™ network. Networks with LonMark certified controllers provide the latest open protocol technology. Being LonMark certified guarantees that owners and end-users have the capability of addingTrane products to other “open” systems and relieves owners of the pressure and expense of being locked into a single DDC supplier.
DDC Controls • When in PI-mode, EH is disabled when the sensed flow is below the minimum required. • HW coilVAV units in ventilation flow control (VFC) have a Freeze protection algorithm to protect the water coil and the internal space from water damage.This is accomplished by driving the water valve to maximum position on alarm conditions.
DDC Controls Trane) building automation control systems, including Johnson Control, Andover, Siemans, Honeywell, etc. • CO2 demand controlled ventilation enables a HVAC system to adjust ventilation flow based on critical zone, average CO2 of specified zones, etc.Trane demand controlled ventilation strategies are pre-defined for simplified application and can be easily customized to meet the needs of a specific system.
DDC Controls When connected to aTraneTracer Building Automation System, trend logging, remote alarming, etc. are available to fully utilize the power and capabilities of your systems. General Operation-Cooling In cooling control action, the DDC controller matches primary airflow to cooling load.The DDC controller will automatically change over to heating control action if the supply air temperature is above a configured/editable setpoint.
DDC Controls Series fan-powered terminal unit fans are continuously energized during occupied mode. When unoccupied, the fan is energized upon a call for heating or cooling and de-energized when unoccupied zone setpoint is satisfied. The water valve opens as space temperature drops below the heating setpoint. A separate reheat proportional-plus-integral control loop from that controlling airflow into the room is enforced.
DDC Controls Ventilation Control Ventilation control enhances the usability ofTrane DDC controllers in more select applications that require measurement of outside air (ventilation). Ventilation control is designed for use with constant volume single-ductVAV units which modulate the primary damper and associated reheat to maintain an average constant discharge air temperature.The reheat is modulated to provide discharge air temperature consistent with AHU supply air temperature (typically 50º–60ºF).
DDC Controls LonMark™ Direct Digital Controller—Unit Control Module TheTrane LonMark direct digital controller Unit Control Module (DDC-UCM) is a microprocessor-based terminal unit with non-volatile memory which provides accurate airflow and room temperature control ofTrane and nonTrane VAV air terminal units. LonMark provides a simple open protocol to allow integration ofTrane VAV units and controls into other existing control systems.
DDC Controls Storage Environment -40 to 180°F (-40 to 82.2°C), 5% to 95%RH, Non-Condensing Physical Dimensions Width: 5.5" (139.7 mm) Length: 4.5" (69.85 mm) Height: 2.0" (44.45 mm) Connections 1/4" (6.35 mm) Stab Connections Communications LonMark – Space Comfort Control (SCC) profile with FTT-10 transceiver. 22 awg. unshielded level 4 communication wire. Fan Control Series fan: On unless unoccupied and min. flow has been released.
DDC Controls Table 137.
DDC Controls Direct Digital Controller—Unit Control Module TheTrane direct digital controller Unit Control Module (DDC-UCM) is a microprocessor-based terminal unit with non-volatile memory which provides accurate airflow and room temperature control ofTrane VAV air terminal units.The UCM can operate in a pressure-independent or a pressuredependent mode and uses a proportional plus integral control algorithm.
DDC Controls Physical Dimensions Width: 5.5" (139.7 mm) Length: 2.8" (69.85 mm) Height: 1.8" (44.45 mm) Connections 1/4" (6.35 mm) Stab Connections Communications RS-485; Stranded wire, twisted pair, shielded, copper conductor only, 18–20 awg Fan Control • Series fan: On unless unoccupied and min. flow has been released. • Parallel fan: On when zone temperature is less than heating setpoint plus fan offset. Off when zone temperature is more than heating setpoint plus fan offset plus 0.5°F (0.28°C).
DDC Controls Dimensions 2.896 in (73.55 mm) 1.419 in (36.03 mm) 0.118 in (3.00 mm) 3.385 in (86.0 mm) 4.677 in (118.8 mm) 0.650 in (16.50 mm) R0.71 in (R1.80 mm) TYP 2.480 in (63.0 mm) 0.236 in (6.0 mm) 2.62 in (66.55 mm) 1.344 in (34.14 mm) Specifications Operating Temperature -40 to 158ºF (-40 to 70ºC) Storage temperature -40 to 185ºF (-40 to 85°C) Storage and operating humidity range 5% to 95% relative humidity (RH), non-condensing Voltage 24 Vac/Vdc nominal ± 10%.
DDC Controls not the limiting factor for proper signal quality. Signal quality is ffected by walls, barriers, and general clutter. For more information os available at http://www.trane.com. Output power North America: 100 mW Radio frequency 2.4 GHz (IEEE Std 802.15.4-2003 compliant) (2405–2480 MHz, 5 MHz spacing) Radio channels 16 Address range Group 0–8, Network 1–9 Mounting Fits a standard 2 in. by 4 in. junction box (vertical mount only). Mounting holes are spaced 3.2 in.
DDC Controls Storage Environment—Sensor/Receiver -40 to 185°F, (-40 to 85°C); 5 to 95%RH, Non-condensing Mounting Receiver: Suitable for mounting above or below ceiling grid. Requires 24V power. Factory installed receiver comes mounted to the VAV unit with power provided by associated unit controller transformer. Field installed option provided with associated wire harness for similar power and communication connection.
DDC Controls CO2 Wall Sensor and Duct CO2 Sensor Figure 11. CO2 wall sensor (L) and duct CO2 sensor (R) The wall- and duct-mounted carbon dioxide (CO2) sensors are designed for use withTrane DDC/ UCM control systems. Installation is made simple by attachment directly to the DDC/ UCM controller.This allows the existing communication link to be used to send CO2 data to the higherlevelTrane control system.
DDC Controls Output Signal (jumper selectable) 4-20 mA, 0–20 mA, 0–10 VDC Resolution of Analog Outputs 10 ppm CO2 Power Supply Nominal 24 VAC Power Consumption <5 VA Housing Material ABS plastic Dimensions 4 1/4" x 3 1/8" x 1 7/16" (Wall only) (108 mm x 80 mm x 36 mm) (Wall only) 3 1/8" x 3 1/8" x 7 ¾" (80 mm x 80 mm x 200 mm) VAV-PRC012-EN 175
DDC Controls DDC Zone Sensor with LCD The DDC zone sensor with LCD has the look and functionality of the standardTrane DDC zone sensor but has a LCD display.The sensor includes setpoint adjustment, the display of the ambient temperature, a communication jack, and occupied mode override pushbuttons. Also, it can be configured in the field for either a Fahrenheit or Celsius display, a continuous display of the setpoint and the offset of displayed temperatures.
DDC Controls Zone Occupancy Sensor The zone occupancy sensor is ideal for spaces with intermittent occupancy. It is connected to theTrane DDC UCM and allows the zone to shift to unoccupied setpoints for energy savings when movement is not detected in the space. The zone occupancy sensor has a multi-cell, multi-tier lens with a maximum field of view of 360°.The maximum coverage area of the sensor is 1200 square feet with a maximum radius of 22 feet from the sensor when mounted at 8 feet above the floor.
DDC Controls Factory or Field Wired Auxiliary Temperature Sensor The auxiliary temperature sensor is used in conjunction with theTrane DDC controller to sense duct temperature. When the DDC controller is used with a Building Automation System, the sensor temperature is reported as status only. When the DDC control is used as stand alone configuration and the sensor is placed in the supply air duct, the sensor determines the control action of the UCM in a heat/cool changeover system.
DDC Controls Two-Position Water Valve Two-position hot water valves are used withTrane DDC/UCM controls and analog electronic controls. Valve actuation is by a hysteresis synchronous motor. All valves are field-installed and convertible from three-way to two-way by means of an included cap.
DDC Controls Proportional Water Valve The proportional water valve is used to provide accurate control of a hot water heating coil to help maintain a zone temperature setpoint.The valve is a ball design and comes in available in four different flow capacities for proper controllability.The valves are field-adjustable for use as a two- or three-way configuration.The valves ship in a two-way configuration with a plug that is installed loose in the bypass port.
DDC Controls Differential Pressure Transducer The differential pressure transducer is used in conjunction with theTrane direct digital controller and analog electronic controller.The pressure transducer measures the difference between the high-pressure and lowpressure ports of theTrane flow ring. The transducer is self-adjusting to changes in environmental temperature and humidity. Specifications Input Pressure Range 0.0 to 5.0 in.
DDC Controls Transformers The transformer converts primary power supply voltages to the voltage required by the direct digital controller and analog.The transformer also serves to isolate the controller from other controllers which may be connected to the same power source.
DDC Controls Trane Actuator – 90 Second at 60 Hz Drive Time This actuator is used with DDC controls and retrofit kits. It is available with a 3-wire floating-point control device. It is a direct-coupled over the shaft (minimum shaft length of 2.1"), enabling it to be mounted directly to the damper shaft without the need for connecting linkage.The actuator has an external manual gear release to allow manual positioning of the damper when the actuator is not powered.
DDC Controls Belimo Actuator – 95 Second Drive Time This actuator is used with DDC controls and retrofit kits. It is available with a 3-wire floating-point control device. it is a direct-coupled over the shaft enabling it to be mounted directly to the damper shaft without the need for connecting linkage. The actuator has an external manual gear release to allow manual positioning of the damper. The actuator is UL listed and caries the CE mark.
DDC Controls Trane Spring Return Actuator This actuator is used with DDC controls and is a floating-point control device. It is direct-coupled over the shaft (minimum shaft length of 2.1"), enabling it to be mounted directly to the damper shaft without the need for connecting linkage.The actuator is Underwriters Laboratories Standard 60730 and Canadian Standards Association C22.2 No. 24-93 certified as meeting correct safety requirements and recognized industry standards.
DDC Controls VariTrane DDC Retrofit Kit The retrofit kit provides the system advantages ofVariTrane DDC controls to building owners for existing systems.The kit can be applied when converting from pneumatic or analog controlled systems to a DDC controlled system.The kit may be used on existing single-duct units with hot water and electric reheat (three stages), dual-duct units, and all fan-powered units (both series and parallel) with hot water and electric reheat (two stages).
DDC Controls Humidity 5% to 95% RH, Non-Condensing Ambient Temperature -22 to 122°F (-30C to 50°C) Storage Environment -40 to 176°F (-40 to 80°C) Torque 45 in.-lb (5N-m) Running Time 95 sec. for 0 to 45 in-lb Noise Rating Less than 35 dB (A) Weight 1.2 lbs (0.
DDC Controls General Specifications Parameters Maximum Capacitance, Input/Output 10 pF Ambient Operating Temperature Range -20 to 80°C Ambient Storage Temperature Range -40 to 125 °C Encapsulation Thermally conductive Epoxy Input connector Header Connector 3.5mm Output Terminals Screws and Saddle Clamps Furnished, Installed Output Max Wire Size Output:2 x AWG 8 (3.8mm) Output Screws Maximum Torque 20 in lbs (2.2 Nm) Assembly Specifications Weight (typical) 1.38 Lb (0.628 Kg.
DDC Controls Reset Start Point Field-adjustable from 0 to 10 psig (0 to 68.9 kPa) Main Air Pressure 15 to 30 psig (103 to 207 kPa) Air Consumption 28.8 scim (0.472 L/m) at 20 psig (138 kPa) main air pressure Operating Environment 40 to 120ºF (4 to 49°C) Storage Environment -40 to 140ºF (-40 to 60°C) Output Sensitivity 5 psig/0.02 in. wg (34.5 kPa/5.0 Pa) Physical Dimensions Width: 4.5" (114.3 mm) Length: 2.3" (58.4 mm) Height: 3.87" (98.
DDC Controls Reset Pressure Span Factory-set at 5 psig (34.5 kPa) Field-adjustable from 0 to 7 psig (0 to 48.3 kPa) Reset Start Point Factory-set at 8 psig (55.2 kPa) Field-adjustable from 0 to 10 psig (0 to 68.9 kPa) Main Air Pressure 15–30 psig (103 to 207 kPa) Air Consumption 43.2 scim (0.708 L/m) at 20 psig (138 kPa) main air pressure Operating Environment 40 to 120ºF (4 to 49°C) Storage Environment -40 to 140ºF (-40 to 60°C) Output Sensitivity 5 psig/ 0.02 in. wg (34.5 kPa/ 5.
DDC Controls Supply Connection 3/16" (4.8 mm) nipple for ¼" (6.4 mm) O.D. tubing Weight 1.5 lbs (680 g) Ambient Limits: Operating:-20 to 120°F (-28.889 to 48.889°C) Shipping:-40 to 140°F (-40 to 60°C) Reversing Relay Tubing Connections: 1/4" O.D. tubing connections The pneumatic reversing relay is a proportional device that reverses the action of the input signal. It is used to change a direct-acting signal into a reverse-acting signal or to change a reverse-acting signal into a direct-acting signal.
DDC Controls Signal Limiter Tubing Connections: 3/16" (4.8 mm) nipples for 1/4" (6.4 mm) polyethylene tubing The pneumatic signal limiter is a pressure limiting type device.The output pressure from the signal limiter is not allowed to rise above the signal limiter’s setting. Adjustments to the output pressure setting are made via a screw on the back side of the valve. Specifications Factory Setting Maximum output = 8 psig (55.2 kPa) Adjustable from 2–12 psig (13.8–82.
DDC Controls PN00 – VPCF, LPCF Parallel Fan-Powered Without Reheat (Normal Operation: Cooling Only) Normally-Open Damper and Actuator (Reverse-Acting Thermostat) With an increase in room temperature, the thermostat output pressure is decreased and the actuator opens to increase primary cooling airflow to the space. With a decrease in room temperature, the opposite action occurs until the damper is fully closed. Upon a continued decrease in zone temperature below setpoint, the parallel fan is energized.
DDC Controls 194 VAV-PRC012-EN
DDC Controls PN00-VSCF, LSCF series fan-powered without reheat VAV-PRC012-EN 195
DDC Controls PN00-VSEF, LSEF series fan-powered with electric heat 196 VAV-PRC012-EN
DDC Controls PN00-VSWF, LSWF series fan-powered with water coils VAV-PRC012-EN 197
DDC Controls 198 VAV-PRC012-EN
DDC Controls PN05 – VPWF, LPWF - Fan-Powered Terminal Units (Normal Operation: Cooling with Hot Water Reheat) Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Reverse-Acting Thermostat) With an increase in room temperature, the thermostat output pressure is decreased. This signal is input to the volume regulator, which also receives the inputs from the high- and low-pressure from the flow ring.
DDC Controls PN51 – VSCF, LSCF - Fan-Powered Terminal Units (Normal Operation: Cooling Only - Duct Pressure Switch) Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Reverse-Acting Thermostat) This unit is energized by sensing inlet static pressure by the duct pressure switch. The unit fan runs continually during occupied operation. With an increase in room temperature, the thermostat output pressure is decreased.
DDC Controls PN51 – VSWF, LSWF - Fan-Powered Terminal Units (Normal Operation: Cooling with Hot Water Reheat - Duct Pressure Switch) Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Reverse-Acting Thermostat) This unit is energized by sensing inlet static pressure by the duct pressure switch. The unit fan runs continually during occupied operation. With an increase in room temperature the thermostat output pressure is decreased.
DDC Controls PN52 – VSCF, LSCF - Fan-Powered Terminal Units (Normal Operation: Cooling with Electric Reheat - Dual Pressure Main) Normally-Open Damper, Actuator, and 3011 Pneumatic Volume Regulator (Reverse-Acting Thermostat) The unit is energized into occupied status by a setting of main system air pressure to 15 psi (103 kpa). At unoccupied, the main system air is set to 20 psi (138 kpa). The unit fan cycles on as 1st stage heat when called for by the unit's thermostat.
DDC Controls Controls Specifications For all VariTrane units, the unit controller continuously monitors the zone temperature and varies the primary airflow as required to meet zone setpoints. Airflow is limited by adjustable minimum and maximum setpoints. Additionally, for series fan-powered units, the controller will start and run the fan continuously during the occupied mode and intermittently during the unoccupied mode.
DDC Controls sensors, but do so using radio transmitter technology. No wiring from the zone sensor to the UCM controller is necessary. Digital Display Zone Sensor with Liquid Crystal Display (LCD) The direct digital zone sensor contains a sensing element which sends a signal to the UCM. A Liquid Crystal Display (LCD) indicates setpoint, or space temperature. Sensor buttons allow setpoint adjust, and allow space temperature readings to be turned on or off.
DDC Controls • Reset-Enabling the reset function forces the controller and the flow sensor to recalibrate • Programmable hot water valve drive time • Programmable air damper drive time The following unit setpoints reside in the UCM in nonvolatile memory.These setpoints are editable from theTracer via the communications link.
DDC Controls • Failure Indicators –The UCM will indicate the following: 1)Temperature Sensor Failure; 2) Flow Sensor Failure; and 3) Local Zone Sensor Setpoint Failure. • Ventilation Ratio • Fan Status (on/off) • Calibration Status (calibration/not-calibrating) • BIP state • CO2 Concentration—Available only if the unit has an auxiliary CO2 sensor.This mode and auxiliary air temperature are mutually exclusive.
DDC Controls • • • • PC00: Cooling Only with Normally-Closed damper - Direct-ActingThermostat PC03: Cooling and Heating, Normally-Closed heating damper, Normally-Open cooling damper, actuators only - Direct-ActingThermostat PC04: Cooling with hot water reheat, Normally-Closed damper, 3011 PVR - Direct-Acting Thermostat PC05: Cooling with electric reheat, Normally-Closed damper, 3011 PVR - Reverse-Acting Thermostat Options Power Fuse (cooling only and hot water units, and VDDF) An optional fuse is factory
Application Considerations Variable-Air-Volume (VAV) System RA EA OA supply fan PA VAV box cooling coil variablespeed drive thermostat SA VAV System No Heat Central Cooling Only—In some systems, the central air handler provides only cooling and ventilation during zone occupied periods.The supply air is maintained at a constant temperature and the supply airflow is modulated to match the VAV airflow rate with the zone cooling requirements.
Application Considerations Terminal Heat Remote Heat—In some zones of a single-ductVAV system, perimeter heating equipment, remote from the terminal unit, is used to add heat to the zone when the cooling load is lower than the minimum cooling capacity of the VAV terminal unit. Heat is added directly to the zone while cool supply air continues to enter the zone at a minimum rate for zone ventilation.
Application Considerations Figure 14. Series fan-powered unit cooling only (L) and series fan-powered unit with hot water coil (R) VAV Terminal Unit Types Parallel Fan-Powered Parallel fan-powered units are commonly used in VAV zones which require some degree of heat during occupied hours—when the primary supply air is cool.The terminal unit fan is in parallel with the central unit fan; no primary air from the central fan passes through the terminal unit fan.
Application Considerations operates off a separate motor.The fans still remain in series or parallel with the primary system central fan. Low acoustic levels are much more challenging in these low ceiling space applications, due to the reduced radiated ceiling pleunum effect. The operation of the low-height terminal unit is exactly the same as that of a series or parallel terminal unit, as are the options for high-efficiency ECMs, insulation options, etc.
Application Considerations Table 139. Parallel vs. series Parallel Series Fan Operation Intermittent operation during occupied and unoccupied modes. Continuous operation during the occupied modes. Intermittent operation during unoccupied mode. Operating Sequence Variable-volume, constant-temperature device during Constant-volume, variable-temperature device at all cooling. Constant-volume, variable-temperature times. Delivers design airflow regardless of the load. during heating.
Application Considerations Low-Temperature Air Figure 16. Low temperature air system layout Variable Volume Exhaust Fan Heating Coil Zone 1 Preheat Coil Variable Volume Supply Fan Series or Parallel Fan-powered Unit Cooling Coil 48° 55° Zone 2 Benefits of Low-Temperature Air The benefits of low-temperature air systems include reduced first cost, reduced operating cost and increased revenue potential.
Application Considerations handler or rooftop with series or parallel fan-powered VAV terminal units.The supply air would be cooled to 48–52°F (8.9–11.1°C). The VAV terminal units include a parallel or series fan with the central air handler or rooftop fan. The terminal unit fan operates continuously, mixing 45-50°F (7.2–10°C) supply air with warm plenum air, to provide 50–55°F (10–12.8°C) cooling air to the occupied space at design conditions.
Application Considerations The parallel fan should be large enough to temper the design cooling airflow at 45–50°F to 50–55°F (7.2–10°C to 10–12.8°C). For instance, if the design cooling airflow is 1000 cfm at 55°F (472 L/s at 12.8°C), you will need 781 cfm of 48°F (368 L/s of 8.9°C) supply air and 219 cfm of 80°F (103 L/s of 26.7°C) plenum air.The parallel fan can be sized for the 219 cfm (103 L/s) rather than the total room airflow.
Application Considerations Airside System Factors A couple of system related factors should be noted as they apply to condensation.The first is the advantage the colder primary air has from a humidity standpoint. As noted in the description above, the low-temperature system operates at space relative humidity of 30–45% while a standard system operates at space relative humidity of 50–60%.
Application Considerations Figure 17. Optimized static-pressure control Ventilation Reset The Ventilation Reset control strategy enables a building ventilation system to bring in an appropriate amount of outdoor air per ASHRAE Standard 62.1. The basis for the strategy is measuring airflow at each zone, calculating current system ventilation efficiency using the multiple-zone system equations of the standard, and communicating a new outdoor airflow setpoint to the air handler.
Application Considerations Control Types VAV terminal units are available with many different options.These options fall into three main categories of controls: direct digital (DDC), pneumatic, and analog electronic. All of these control types can be used to perform the same basic unit control functions, yet differences exist in accuracy of performance, versatility, installed cost, operating cost, and maintenance cost.
Application Considerations Large Installed Base—Pneumatic systems are very common in existing buildings.This eliminates the need to purchase the most expensive piece of equipment in a pneumatic control system—the control air compressor. Extensions to existing pneumatic systems are generally very simple and extremely cost-effective. Disadvantages: Performance—Pneumatic controls provide proportional-only control for VAV terminal unit systems.
Application Considerations is really in the construction of the thermostats.The two-pipe thermostats have a constant pressure supply connected via an air tube to the thermostat supply air port.The supply air travels through the thermostat’s relays, levers, diaphragm, and bleed port to produce an output.The output line is connected to the output port of the thermostat and extends to the controlled device.The onepipe thermostat has, as its name suggests, only one air line connection.
Application Considerations The damper will modulate from zero to maximum position over a 2°F temperature change. Bleed Port to Atmosphere—Bleeding air to the atmosphere is a normal operation for a volume regulator.The 3011 volume regulator addresses this function with a dedicated bleed port. When air is bled through the flow sensor, the differential pressure signal from the sensor is affected.
Application Considerations coil are the high-pressure taps that average the total pressure of air flowing through the air valve. The orifices in the downstream ring are low-pressure taps that average the air pressure in the wake of flow around the tube. By definition, the measurement of static pressure is to occur at a point perpendicular to the airflow.The low-pressure taps on the VariTrane flow ring measure a pressure that is parallel to the direction of flow but in the opposite direction of the flow.
Application Considerations Figure 21. Air pressure measurement orientations Air Density Effects Changes in air density due to the conditions listed below sometimes create situations where the standard flow sensing calibration parameters must be modified.These factors must be accounted for to achieve accuracy with the flow sensing ring. Designers, installers, and air balancers should be aware of these factors and know of the necessary adjustments to correct for them.
Application Considerations Linearity With the increase in DDC controls over pneumatic controls, the issue of linearity is not as great as it once was.The important aspect of flow measurement versus valve position is the accuracy of the controller in determining and controlling the flow. Our units are tested for linearity and that position versus airflow curve is downloaded and commissioned in the factory to insure proper control of the unit. Reheat Options Figure 22.
Application Considerations Electric Reheat Electric heating coils are applied onVAV terminal units as terminal reheat devices. Electric heat coil capacity is rated in kilowatts (kW). Coils are available with the total capacity divided into one, two, or three stages. Electric heat coils are available in single-phase or three-phase models.This refers to the type of power source connected to the coil. Single-phase models have resistance elements internally connected in parallel.
Application Considerations Insulation Encapsulated edges Insulation in aVAV terminal unit is used to avoid condensation on the outside of the unit, to reduce the heat transfer from the cold primary air entering the unit, and to reduce the unit noise. The VariTrane line offers four types of unit insulation.The type of facing classifies the types of insulation.To enhance IAQ effectiveness, edges of all insulation types have metal encapsulated edges.
Application Considerations Sizing of Units Before blindly increasing the size of units, we must first understand what is setting the acoustics within the space. In general, over 95% of acoustics in VAV terminal units, which set the sound pressure levels and ultimately the NC within the space, is from radiated sound.This is readily known for fan-powered units, but less commonly known for single- and dual-duct units.
Application Considerations Placement of units Unit placement in a building can have a significant impact on the acceptable sound levels. Locating units above non-critical spaces (hallways, closets, and storerooms) will help to contain radiated sound from entering the critical occupied zones. Unit Attenuation Terminal unit-installed attenuators are an option available to provide path sound attenuation.
Application Considerations By using NC sound levels, it is possible to express acceptable sound levels for various types of buildings or environments. A few examples are: Concert Hall NC-22 Hospital Room NC-30 School Room NC-35 General Office NC-40 Cafeteria NC-45 Factory NC-65 Path Attenuation Sound is generated by a terminal unit can reach the occupied space along several paths.The terminal unit generated sound will lose energy—i.e.
Application Considerations Computer Modeling Computer modeling of acoustical paths is available to help estimate sound levels and determine problem sources.The software used byTrane for computer modeling is calledTrane Acoustics Program (TAP™). TAP can analyze different room configurations and materials to quickly determine the estimated total sound levels (radiated and discharged) in a space.TheTrane Official Product Selection System (TOPSS™) can also be used to determine sound levels of terminal units.
Application Considerations Advantages of the static regain method include reduced total pressure drops, lower operating costs, and balanced pressures over a wide range of flows.The drawback of this design is the timeconsuming, iterative calculation procedure and for large systems, it is essential to have a duct design computer program. Best Practices Common Mistakes Some of the most common system or installation errors are discussed below.
Application Considerations Static Pressure Measurement Errors Improper measurement techniques for static pressure can lead many to mistakenly believe that the terminal unit is causing a large pressure drop in the system.The chief error made here is taking a static pressure measurement in turbulent locations such as flexible ductwork or near transitions. This produces invalid static pressure readings.
Application Considerations Additional VAV System and Product References VAV Systems Air Conditioning Clinic This clinic is designed to explain the system components, the system configurations, many of the VAV system options and applications. A great resource for VAV system understanding. Literature Order Number:TRG-TRC014-EN Indoor Air Quality – A guide to understanding ASHRAE Standard 62-2001 The guide helps to explain the ASHRAE Standard as well as the fundamentals of good indoor air quality.
Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the leader in creating and sustaining safe, comfortable and energy efficient environments, Trane offers a broad portfolio of advanced controls and HVAC systems, comprehensive building services, and parts. For more information, visit www.Trane.com. Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
