Excel 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER SYSTEM ENGINEERING Contents Introduction .................................................................................................................................. Description of Devices.......................................................................................... Control Application ............................................................................................... Control Provided...........................................
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER General Considerations .................................................................................. 35 W7750 Controllers .......................................................................................... 36 FACTORY DEFAULT DIGITAL OUTPUTS: ................................................ 37 LONWORKS® Bus Termination Module ........................................................... 43 Step 5. Order Equipment ..................................
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER List of Figures Fig. 1. Typical system overview. ................................................................................................................................................ 6 Fig. 2. Typical W7750 control application. ................................................................................................................................. 7 Fig. 3. Excel 10 W7750A Constant Volume AHU Controller. .................................
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Fig. 48. Setpoint ramping parameters with ramp rate calculation............................................................................................... 58 Fig. 49. Schematic diagram for a typical W7750B Unit. ............................................................................................................. 59 Fig. 50. Staged output control versus PID Error. ..................................................................................
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER List of Tables Table 1. Agency Listing. ............................................................................................................................................................. Table 2. List of Differences in W7750A and W7750B,C Controllers........................................................................................... Table 3. Common Configuration Options Summary For W7750A,B,C Controllers...................................
Excel 10 W7750A,B,C Constant Volume AHU Controller EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER LONWORKS network (LONWORKS Bus) for communications, and conforms with the LONMARK HVAC Interoperability standard for Roof Top Unit Controllers (see Fig. 9). INTRODUCTION Description of Devices The T7770 or T7560 direct-wired Wall Modules are used in conjunction with W7750 Controllers. The zone controlled by the W7750 Controller typically can use a T7770A through D or a T7560A,B Wall Module.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Control Application The W7750 can control staged or modulating heating and cooling coils, mixed air economizer dampers, and the system fan. Control of heat pump units, where the compressor(s) is used for both cooling and heating, is also provided. The zone the W7750 services can use a T7770 or T7650 for space temperature sensing and an LONWORKS Bus network access for users. Fig. 2 shows a typical W7750 control application.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Like the W7751 VAV Box Controller, the W7750 Controller can monitor a space-mounted occupancy sensor, and a door/ window contact. These inputs affect the operational mode of the controller (see Table 5 for a list of all possible modes of operation). The W7750 Controller allows other controllers in the system to use the W7750s physical inputs and outputs.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Product Names NOTE: The T7770B,C Models are available with a absolute 55 to 85°F (10 to 85°C) or a relative scale plate adjustable in E-Vision to ± 18°F (± 5°C). The W7750 Controller is available in three models: • W7750A Constant Volume AHU Controller - W7750A Version. • W7750B Constant Volume AHU Controller - W7750B Version. • W7750C Constant Volume AHU Controller - W7750C Version. The T7770 Wall Module is available in four models.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Abbreviations and Definitions AHUAir Handling Unit; the central fan system that includes the blower, heating equipment, cooling equipment, ventilation air equipment, and other related equipment. Excel 10 Zone ManagerA controller that is used to interface between the C-Bus and the LONWORKS Bus. The Excel 10 Zone Manager also has the functionality of an Excel 100 Controller, but has no physical I/O points. COCarbon Monoxide.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER PWMPulse Width Modulated output; allows analog modulating control of equipment using a digital output on the controller. Construction RTDResistance Temperature Detector; refers to a type of temperature sensor whose resistance output changes according to the temperature change of the sensing element. The Excel 10 W7750 Controller is available in three different models.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER W7750A 31 30 29 W1 W2 Y1 28 27 26 Y2 G 25 24 23 22 NETWORK DO Rc Rh 21 20 19 18 17 16 24 24 VAC NOT NOT NOT NOT NOT VAC COM USED USED USED USED USED E LED BYPASS SNSR GND GND SET PT AI-1 GND DI-1 GND GND OHM DI-2 NOT LONWORKS 1 2 3 LON USED 4 5 6 BUS JACK 7 8 9 10 11 12 13 14 15 J3 Fig. 3. Excel 10 W7750A Constant Volume AHU Controller.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER 2-1/8 (54) 31 30 29 28 27 26 25 24 23 22 NEYWORK DO WI W2 E GND LED 1 2 Y1 BYPASS 3 Y2 SNSR 4 Rc Rh 24 VAC AI-1 OHM GND DI-1 GND 7 8 G GND 5 SET PT 6 9 10 21 20 19 18 17 24 VAC COM NOT USED NOT USED NOT USED GND DI-2 NOT USED NOT USED LONWORKS 11 12 13 14 BUS 15 16 NOT USED 5-5/8 (143) L ON JACK J3 3-1/16 (77) 5-3/16 (132) 6 (152) M10098B Fig. 4. W7750A construction in in. (mm).
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER 31 DI-4 30 29 DI GND E GND LED 1 2 DI-3 28 27 26 DI-2 BYPASS SNS R 3 4 DI GND AI GND 5 DI-1 SET PT 6 25 24 23 22 VAC 24 AI-1 OHM 7 VAC 24 COM 1 OUT AI GND A1-2 OHM 8 9 2 OUT 21 20 19 18 3 OUT 4 OUT 5 OUT AI-3 V/mA AI GND AI-4 V/mA 20VDC OUT 10 11 12 13 14 6 OUT 17 16 7 OUT 8 OUT LONWORKS BUS 15 LON JACK J3 M6854B Fig. 5. Excel 10 W7750B Constant Volume AHU Controller.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER 31 DI-4 E GND 1 30 29 DI GND LED 2 DI-3 28 27 26 DI-2 BYPASS SNS R 3 4 DI GND DI-1 AI GND SET PT 5 6 25 24 23 22 VAC 24 VAC 24 COM 1 OUT AI-1 OHM AI GND A1-2 OHM 7 8 9 2 OUT 21 20 19 18 3 OUT 4 OUT 5 OUT AI-3 V/mA AI GND AI-4 V/mA 20VDC OUT 10 11 12 13 14 A0 1 17 16 A0 2 A0 3 LONWORKS BUS 15 LON JACK J3 M17489 Fig. 6. Excel 10 W7750C Constant Volume AHU Controller.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER 2-1/8 (54) 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 VAC 3 2 4 A0 A0 A0 1 5 VAC 24 DI DI-4 GND DI-3 DI-2 DI DI-1 24 COM OUT OUT OUT OUT OUT 1 2 3 GND E LED BYPASS SNSR AI SET PT AI-1 AI AI-2 AI-3 AI AI-4 20VDC LONWORKS LON GND GND BUS OHM GND OHM V/mA GND V/mA OUT JACK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 J3 5-5/8 (143) 3-1/16 (77) 5-3/16 (132) 6 (152) M17490 Fig. 7. W7750B,C construction in in. (mm).
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER 2 3 1 M6857 Fig. 8. DIN rail adapters. The FTT supports polarity insensitive free topology wiring. This frees the system installer from wiring using a specific bus topology. T-tap, star, loop, and mixed wiring topologies are all supported by this architecture. The maximum LONWORKS Bus length when using a combination of T-tap, star, loop, and bus wiring (singly terminated) is 1640 ft. (500m) with the maximum node-to-node length of 1312 ft. (400m).
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Inputs/Outputs: The W7750A Unit supports the following hardware features: Hardware Output • Three 20 Kohm NTC (1000 through 150,000 ohm) or PT3000 (250 through 12,000 ohm) resistive analog inputs (one reserved for space temperature and one reserved for the setpoint knob). • Three dry contact digital inputs (one reserved for the Bypass pushbutton). • LED digital output (only for the wall module LED) 2.5V at 3 mA. • Six 24 Vac relay digital outputs (1.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Outdoor Air Humidity (W7750B,C only): Type: Voltage/Current. Supported Sensors: C7600B1000 and C7600B1018 (2 to 10V), C7600C1008 (4 to 20mA). Outdoor Air Enthalpy (W7750B,C only): Type: Current. Supported Sensors: C7400A1004 (4 to 20mA).
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Wall Modules size (see Product Names section for differences). The models T7560A1016 and T7560B1018 are shown in Fig. 11. The T7560A,B are the same physical size. The T7770 or T7560 Wall Modules for the Excel 5000 and Excel 10 Controllers are available in a variety of configurations. The models T7770A1006 and T7770C1002 are shown in Fig. 10. The T7770B,D are the same physical Duct Sensor The dimensions of the C7770A duct-mounted sensor are shown in Fig.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER 3-7/16 (86) 4 (100) 12345678 2-11/16 (68) 3-7/8 (97) 4-1/8 (104) 3-15/16 (99) 1-3/16 (30) M17479 Fig. 11. T7560A,B construction in in. (mm). 1-1/2 (38) 8-1/2 (216) 1/2 (13) 3/4 (19) 1/2 IN. (13) DIAMETER 3/8 IN. (10) DIAMETER 7/8 (22) 3-1/2 (89) 1/4 (6) DIAMETER (2 HOLES) 1/2 (13) 6-5/32 (156) M7724 Fig. 12. C7770A construction in in. (mm).
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Configurations CAUTION General For floating control, the Excel 10 W7750 Controller is designed to work only with Series 60 valve and damper actuators. Full stroke actuator drive-time must be between 20 and 240 seconds (0.25 to 4.0 minutes). Tables 3 and 4 provide an overview of the Excel 10 W7750 configuration options. All W7750s are assumed to have a supply fan digital output.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 4. Configuration Options Summary For W7750A,B,C Controllers. Option Possible Configurations for the W7750A Model Possible Configurations for the W7750B,C Models Type of 1. One stage. 1. One stage. Heating 2. Two stages. 2. Two stages. 3. Three stages. 3. Three stages. 4. Four stages. 4. Four stages. 5. None. 5. Series 60 Modulating electric valve, or pneumatic via transducer. 6.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Allowable Heating and Cooling Equipment Configurations Each W7750 device can control a variety of different types of mechanical cooling and heating equipment within roof top air handlers. See Fig. 13 through 17 for a conceptual overview of some typical configurations. For specific wiring details, see the Prepare Wiring Diagrams section.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER MIXED AIR ECONOMIZER CONTROL Economizer control is available concurrently with any configuration in the W7750 when DOs are not all used by the heating and cooling equipment. Two types of economizer controls are supported by the W7750 Controller, modulating control and enable/disable control. Modulating control can be either Series 60 Floating Control or PWM control (PWM control is available on the W7750B,C only).
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER available through Honeywell, or directly from the manufacturer, Mamac Systems (see Table 11 for ordering information). then the Effective Occupancy mode is STANDBY. The temperature control algorithm is then controlled to the STANDBY Cooling and Heating Setpoints. Fig. 17 depicts a typical W7750 System with modulating heating valve using a pneumatic valve actuator. Also see Fig.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Dirty Filter Monitor The air filter in the air handler can be monitored by the W7750 and an alarm is issued when the filter media needs replacement. The two methods of monitoring the filter are: 1. Connecting a differential pressure switch to a digital input on the W7750A or W7750B,C. 2. Wiring a 2 to 10V differential pressure sensor to a voltage input on the W7750B,C. If the analog input sensor is used, its measured value 0 to 5 inw (0 to 1.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 5. Modes Of Operation For The Excel 10 W7750 Controller (Continued). Mode Description Events causing a controller to switch to this mode UNOCCUPIED Controller occupancy mode was overridden to Unoccupied mode Network input (DestManOcc) containing a time-of-day schedule override signal of UNOCCUPIED from the Excel 10 Zone Manager or other LONWORKS Bus device.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER APPLICATION STEPS EXCEL 10 W7750 CVAHU CONTROLLER Overview The seven application steps shown in Table 6 are planning considerations for engineering an Excel 10 W7750 System. These steps are guidelines intended to aid understanding of the product I/O options, bus arrangement choices, configuration options and the Excel 10 W7750 Controller role in the overall EXCEL 5000 OPEN SYSTEM architecture. Table 6. Application Steps. Step No.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER terminals can be connected to the LONWORKS Bus at the same time. Table 7 summarizes the LONWORKS Bus segment configuration rules. Each LONWORKS Bus segment is set up with two unused nodes to allow for a CARE/E-Vision operator terminal to be connected to the LONWORKS Bus. Multiple CARE/E-Vision Table 7. LONWORKS® Bus Configuration Rules And Device Node Numbers.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER EXCEL 10 CVAHU T7770 209541B TERMINATION MODULES (AT ENDS OF LONWORKS BUS LONWORKS BUS DAISY-CHAIN) EXCEL 10 VAV EXCEL 10 LONWORKS BUS CVAHU EXCEL 10 VAV EXCEL 10 VAV EXCEL 10 EXCEL 10 Q7750A ZONE MANAGER CVAHU T7770s WITH NO LONWORKS BUS ACCESS UP TO 60 TOTAL NODES LONWORKS BUS TO C-BUS (SEE FIG.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER • Do not use different wire types or gauges on the same LONWORKS Bus segment. The step change in line impedance characteristics causes unpredictable reflections on the bus. When using different types is unavoidable, use a Q7751A,B Router at the junction. • In noisy (high EMI) environments, avoid wire runs parallel to noisy power cables, or lines containing lighting dimmer switches, and keep at least 3 in.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 8. VA Ratings For Transformer Sizing. Device W7750A Description controller) and, therefore, has a secondary voltage of 22.9 volts. (Use the lower edge of the shaded zone in Fig. 21 that represents the worst case conditions.) When the I x R loss of four volts is subtracted, only 18.9 volts reaches the controller, which is not enough voltage for proper operation. VA Excel 10 W7750 Controller 6.0 W7750B,C Excel 10 W7750 Controllers 12.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER OUTPUT DEVICE POWER 27 26 25 SECONDARY VOLTAGE 24 TRIAC LINES TO ACTUATORS AND CONTACTORS TRANSFORMER 23 22 21 20 W7750B,C 19 CONNECT POWER TO TERMINALS 24 AND 25 18 25 24 22 20 17 16 15 14 0 50 100 % OF LOAD 200 150 M993 1 Fig. 21. NEMA class 2 transformer voltage output limits. Attach earth ground to W7750 Controller terminal 1. See Fig. 22, 23 and 24, 27 through 35. EARTH GROUND M10089B Fig. 22.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER 24 VAC LINE VOLTAGE GREATER THAN 150 VAC W7750 TRANSFORMER 1 EARTH GROUND 1 EARTH GROUND 1 IF THE W7750 CONTROLLER IS USED IN UL 1995 EQUIPMENT AND THE PRIMARY POWER IS MORE THAN 150 VOLTS, GROUND 24 VAC COM SIDE OF TRANSFORMER SECONDARY. M10088A Fig. 24. Transformer power wiring details for one Excel 10 used in UL 1995 equipment (U.S. only).
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 9. Field Wiring Reference Table (Honeywell listed as AK#### or equivalent). Wire Function Recommended Minimum Wire Size AWG (mm2) Construction Specification or Requirement Maximum Length ft. (m) Vendor Wire Type LONWORKS 22 AWG Bus (0.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 10. W7750A Version I/O Description. Terminal Terminal Number Description DO6–(W1) 31 Heat 1 (or Reversing Valve for a Heat Pump) DO5–(W2) 30 Heat 2 (or Aux.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER HEAT 1 COMP2 HEAT 2 COMP 1 COMP2 LOAD AND CONTROLLER POWER 3 FAN LOAD POWER FAN + - C 20 19 18 17 16 CONTROLLER POWER + - NOT USED 27 26 DISCHARGE AIR TEMP 21 18 17 16 NOT USED 1 2 3 4 5 6 7 8 DI GROUND DI GROUND WALL MODULE 9 10 11 12 13 14 15 J3 2 TIME CLOCK DISCHARGE AIR TEMP 2 JACK FOR LONWORKS-BUS NETWORK ACCESS 1 EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER NOTE: Digital outputs are configurable. The terminal locations for each function are user-selectable. The Network DO is configured to be economizer float close in this figure and W2 is configured to be economizer float open. Physical output terminal features are done in E-Vision by the custom wiring function.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER COOL STAGE 4 FAN COOL STAGE 3 HEAT COOL COOL STAGE 2 STAGE 2 STAGE 1 TWO - OR THREE-WAY CHILLER WATER VALVE HEAT STAGE 1 TWO - OR THREE-WAY HOT WATER/STEAM VALVE SERIES 60 VALVE ACTUATOR STEM UP COM 4 ECONOMIZER DAMPER SERIES 60 VALVE ACTUATOR STEM DOWN STEM UP COM STEM DOWN SERIES 60 ACTUATOR CW COM CCW OUT 6 OUT 7 OUT 8 27 26 W7750B CONSTANT VOLUME AHU CONTROLLER 20 19 18 17 16 12 13 2 1 DISCHARGE AIR TEMP 2 JACK FOR LONW
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER WINDOWS CONTACTS (CONTACTS CLOSED EQUALS WINDOW CLOSED) ECONOMIZER DAMPER PWM ACTUATOR POWER SIGNAL + - SIG 24 23 22 21 20 19 18 17 16 OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 15 LONWORKS-BUS DISCHARGE AIR TEMP E-BUS E-BUS GND E-BUS E-BUS GND SENSOR LED JACK FOR LONWORKS-BUS NETWORK ACCESS SET PT SENSOR 2 BYPASS 9 8 7 6 5 4 3 2 1 SET PT OUT 7 16 OUT 8 17 11 12 13 14 15 LON JACK 10 LONWORKS BUS 9 20
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER WINDOWS CONTACTS (CONTACTS CLOSED EQUALS WINDOW CLOSED) OCCUPANCY SENSOR (CONTACTS CLOSED EQUALS OCCUPIED) 26 25 24 23 22 21 20 19 18 17 16 DI-1 24 VAC 24 VAC COM OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 DI-2 27 DI GROUND 28 DI-3 DI-4 29 DI GROUND 30 TWO - OR THREE-WAY HOT WATER/ STEAM VALVE SERIES 70 VALVE ACTUATOR SERIES 70 VALVE ACTUATOR ECONOMIZER DAMPER FAN + 24 VAC 31 TWO - OR THREE-WAY CHILLER WATER VALVE
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER MMC325 PNEUMATIC TRANSDUCER RP7517B PNEUMATIC TRANSDUCER 2 B M DECREASE 3 RP7517B B 1 M INCREASE 24 (N) 24 (H) 24 (N) 24 (H) PNEUMATIC VALVE ACTUATOR 2 M OUT 5 OUT 6 OUT 7 OUT 8 28 27 26 25 24 23 22 21 20 19 18 17 AO 2 OUT 3 OUT 4 29 16 AO 3 OUT 2 30 AO 1 OUT 1 31 OUT 5 16 OUT 4 17 OUT 3 18 OUT 2 19 OUT 1 20 24 VAC 21 24 VAC COM 22 DI-1 23 DI-2 24 DI GROUND 25 24 VAC + DI-4 DI GROUND 26 24 VAC
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER W7750B, C W7750B, C 1415 BROWN W7750B, C 1415 1415 ORANGE PART NO. 209541B TERMINATION MODULE PART NO. 209541B TERMINATION MODULE BROWN ORANGE M10519A Fig. 38. Typical doubly terminated daisy-chain LONWORKS® Bus segment termination module wiring diagram.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER SINGLY TERMINATED SEGMENT TERMINAL BLOCK FOR Q7750A ZONE MANAGER INTERNAL TERMINATION NETWORK 4 5 6 INTERNAL TERMINATION NETWORK W7750 FIELD INSTALLED JUMPER 3 LONWORKS BUS LONWORKS BUS 7 PART NO.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 11. Excel 10 W7750 Controller Ordering Information.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 11. Excel 10 W7750 Controller Ordering Information. (Continued) Part Number Product Description Comments C7031C1031 Duct Discharge/Return Air Sensor. 20 Kohm C7031D1062 Hot or chilled Water Temperature Sensor. 20 Kohm NTC C7031F1018 Outside Air Temperature Sensor. 20 Kohm NTC W7750B,C only C7031K1017 Hot or chilled Water Temperature Sensor. 20 Kohm NTC Strap-on C7100A1015 Averaging Discharge/Return Air Temperature Sensor. PT3000 13 in.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 11. Excel 10 W7750 Controller Ordering Information. (Continued) Part Number Product Description Comments ML6464A1009 Direct Coupled Actuator, 66 lb-in. torque, Series 60 — ML6474A1008 Direct Coupled Actuator, 132 lb-in. torque, Series 60 — ML6185A1000 Direct Coupled Actuator, 50 lb-in. spring return Series 60 V5852A/V5862A Two-way terminal unit water valve; 0.19, 0.29, Use with M6410 Valve Actuator. Close-off rating 0.47, 0.74, 1.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER 2. 3. 4. 5. 6. 7. Check the version numbers of the controller firmware, E-Vision and the E-Vision script. Check the wiring to the power supply and make sure there is a good earth ground to the controller. Check the occupancy and HVAC modes. Compare the current actual setpoint with the actual space temperature. Check the desired configuration settings. Check the network wiring and type of wire used. Check the Zone Manager mapping and referred points.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 12. Excel 10 Alarms. (Continued) Name of alarm or error bit Alarm type number Meaning of alarm code or error bit LOSS_OF_AIR_FLOW 6 The Fan Status DI indicates that there is no air flow when the node is commanding the fan to run. The control is shut down and disabled until power is cycled or the node is reset. See NOTE below.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Press and release the bypass pushbutton, located on the T7560A,B Digital Wall Modules in Fig. 44 for more than one second to cause the sun symbol on the bottom right side of the LCD display to appear. Pressing the bypass pushbutton for more than four seconds causes the controller, hard-wired to the T7560A,B, to go into continuous unoccupied override. The T7560A,B displays the moon symbol.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Occasionally, the PID parameters require tuning to optimize comfort and smooth equipment operation. This applies to the W7750A,B,C Controllers. lists some recommended values to use as a starting point. These recommended values are based on past experience with the applications and in most cases do not require further adjustment. CVAHU Controllers are configured by E-Vision with default values of PID parameters as shown in Appendix C Table 21.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Common Operations The Excel 10 W7750 Controller applications have many common operations that are applicable regardless of the type of heating, cooling, or economizer equipment configuration. These operations are available to the W7750A and the W7750B,C Versions of the CVAHU Controller, and the I/O and network configurations for them are summarized in Table 14. Available input options are from the wall module and the hard-wired analog and digital inputs.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 15. Configuration Options Summary For W7750A,B,C Controllers. Option Possible Configurations for the W7750A Model Possible Configurations for the W7750B,C Models Type of 1. One stage. 1. One stage. Heating 2. Two stages. 2. Two stages. 3. Three stages. 3. Three stages. 4. Four stages. 4. Four stages. 5. None. 5. Series 60 Modulating electric valve, or pneumatic via transducer. 6.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER than Intermittent Fan (see Fan Operation in this Appendix), and the mode is Occupied when the RmTemp value becomes invalid, the fan continues to run. REMOTE SETPOINT (RmtStptPot) This is the Setpoint Potentiometer contained in the T7770 or the T7560A,B Wall Module. When configured, this occupant value is set to calculate the actual cooling or heating Occupied Setpoint.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER RESET NOT ASSIGNED (LED OFF) PRESS FOR LESS THAN ONE SECOND PRESS FOR ONE TO FOUR SECONDS BYPASS TIMEOUT BYPASS OCCUPIED (LED ON) PRESS FOR FOUR TO SEVEN SECONDS PRESS FOR LESS THAN ONE SECOND UNOCCUPIED (LED BLINK) PRESS FOR MORE THAN SEVEN SECONDS M8483A Fig. 45. LED and Bypass pushbutton operation.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER DestBypass - Has possible states: Bypass On, Bypass Off or Not Assigned (not active). This input places the controller in an untimed bypass state or turns off the bypass mode. This source is second in priority to DestManOcc under the same arbitration schemes mentioned above. Override Button -The wall module Override pushbutton can command status of Bypass, Continuous Unoccupied and Not Assigned.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Standby or Unoccupied modes, the fan cycles on with a call for cooling (or heating if the FanOnHtMode parameter is set). In Intermittent Fan mode, the fan cycles on with a call for cooling (or heating if the FanOnHtMode parameter is set), and cycles off when the space temperature control is satisfied.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER DIRTY FILTER MONITOR The air filter in the air handler can be monitored by the W7750 and an alarm issued when the filter media needs replacement. The two methods of monitoring the filter are: 1. A differential pressure switch whose contacts are connected to a digital input on the W7750A or W7750B,C; and 2. A 2-to-10V differential pressure sensor wired to a current input on the W7750B,C.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER STAGED COOLING CONTROL The Excel 10 W7750 Controller supports up to four stages of D/X cooling. As space temperature rises above the current Cooling Setpoint, the controllers mode of operation is switched to the COOL mode. When in the COOL mode, all heating outputs are driven closed or off (with the exception that occurs during IAQ Override Operation, see above), and the staged cooling outputs are enabled for use.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER cooling control algorithm compares the current space temperature to the EffectiveHeatSetPt, and calculates a PID error signal. This error signal causes the heating stage outputs to be cycled, as required, to drive the space temperature back to the Setpoint. Fig. 50 illustrates the relationship between PID error and staged output activity.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER INDOOR AIR QUALITY (IAQ) OVERRIDE The Excel 10 W7750 Controller supports an IAQ override feature that upon detection of poor air quality in the space, allows the economizer dampers to be opened above the standard minimum position setting to a value set in EconIAQPos.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER User Address Indexes (all in alphabetical order) OaEconEnTemp 75 OaEnthEn 76 OaTempClLkOut 74 OaTempHtLkOut 73 OaTempMaxClRp 75 OaTempMinClRp 75 OaTempMaxHtRp 74 OaTempMinHtRp 74 PwmFullScale 76 PwmPeriod 76 PwmZeroScale 76 StptKnobHiLim 76 StptKnobLowLim 76 Table 20. Input Output Points.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER StatusEconEn 85 StatusEconOut 86 StatusError 90 StatusFilter 87 StatusIaqOvr 87 StatusManOcc 85 StatusMode 84 StatusOcc 84 StatusOcySen 85 StatusOvrd 84 StatusSched 84 StatusSmoke 87 StatusWndw 87 TimeClckOcc 84 WSHPEnable 88 HeatUnoccSpt 98 SrcEconEnable 105 SrcEconEnCt 105 SrcOaHum 100 SrcOaTemp 100 SrcOccSensor 103 SrcRmTemp 100 SrcRmTempActSpt 99 SrcUnitStatus 101 SrcWndw 104 SrcWndwCt 104 Table 27. Direct Access and Special Manual Points.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER DiffEconEnTemp 21 DisMinHtTime 25 DisMinClTime 25 DlcBumpTemp 21 EconIAQPos 21 EconMinPos 21 EconMtrSpd 25 EconPos 23 EconMode 25 FanFailTime 25 FanMode 25 FanOnHtMode 25 FanRunOnCool 25 FanRunOnHeat 25 FilterPress 23 FltrPressStPt 21 Free1Stat 23 Free2Stat 23 GainCoolDer 21 GainCoolInt 21 GainCoolProp 21 GainHeatDer 21 GainHeatInt 21 GainHeatProp 21 HeatCycHr 25 HeatMtrSpd 25 HeatOccSpt 26 HeatPos 23 HeatStbySpt 26 HeatStgsOn 23 HeatUnoccSpt 26 IAQSetpt 2
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER All of the NvName values that are stored in EEPROM memory have a prefix of nci. NOTE: These parameters are stored in EEPROM and are limited to 10,000 writes. Do NOT use them as outputs from Control Strategies,Time Programs, or Switching Tables. If these points are changed more than 10,000 times, irreversible hardware failure results Hardware Config.— Manual Config.
Table 20. Input/Output Points. Engineering Units: English (Metric) or States plus Range Default COR_ON_COOL P Test Manual Config. Hardware Config. Direct Access Map Share Field Name E-Vision (M, P, S) CORMode NvName Digital State or Value of State User Address X E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments COR_ON_HEAT COR_ON_COOL 0 1 CorOnMode specifies the mode when the Change Over Relay (COR) is energized.
Engineering Units: English (Metric) or States plus Range Default E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments 68 nciIoSelect DigitalIn[1] OCC_SENSOR OCC_TIME_CLOCK PROOF_AIR_FLOW ECON_ENABLE IAQ_OVERRIDE SMOKE_MONITOR DIRTY_FILTER SHUT_DOWN WINDOW_OPEN MONITORS CHED_MASTER UNUSED_DI 2 SHCED_MASTER_IN 3 4 5 6 7 8 9 10 11 12 255 X DigitalIn[1] specifies which logical switch type is connected to the flexible digital input switch channel according to the enumerated list that is
Table 20. Input/Output Points. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config.
Engineering Units: English (Metric) or States plus Range Default X Comments 70 nciIoSelect FiftySixtyHz SIXTYFIFTY 01 SIXTY nciIoSelect SpaceSensorType T7770 0 T7770 RmtStptPot nvoIO siSetPointTempS7 Degrees F -9 to 85 Degrees C (-23 to 29) SI_INVALID M, S RmTempSensr nvoIO siSpaceTempS7 Degrees F 40 to 100 Degrees C (4 to 38) SI_INVALID M, S DaTempSensr nvoIO siDischargeTempS7 Degrees F 30 to 122 Degrees C (-1 to 50) SI_INVALID DischargeTemp is the measured discharge air te
Table 20. Input/Output Points. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config. Direct Access Map Share Field Name E-Vision (M, P, S) NvName Digital State or Value of State User Address E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments siSpaceCo2S0 PPM 150 to 2000 SI_INVALID SpaceCo2 is the measured CO2 in the conditioned air space. If the sensor is not configured or has failed, the value is SI_INVALID.
Engineering Units: English (Metric) or States plus Range Default E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments StatusDI3 nvoIO ubDigitalIn Byte Offset = 25 Bit Offset = 5(DigitalIn3) FALSE TRUE 0 1 FALSE DigitalIn3 is a byte with a bit for every physical digital input. If the input is shorted to ground, the bit is a zero or FALSE. If the input is open, the bit is one or TRUE.
Table 20. Input/Output Points. (Continued) Engineering Units: English (Metric) or States plus Range Default WindowSw nvoIO WindowOpen FALSE TRUE 0 1 FALSE MonitorSw nvoIO MonSwitch FALSE TRUE 0 1 FALSE ModelSw nvoIO Model FALSE TRUE 0 1 FALSE nvoIO SchedMaster FALSE TRUE 0 1 FALSE Test Manual Config. Hardware Config.
Engineering Units: English (Metric) or States plus Range Default E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments nciAux1SetPt ubMaxHtRampS0 Degrees F/Hr 0 to 20 Degrees C/Hr (0 to 11) 8 P X X MaxHtRamp is the maximum heat recovery ramp rate in degrees F per hour. This value is used to control the adaptive recovery ramp rate during the HEAT recovery period.
Table 21. Control Parameters. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config. Direct Access Map Share Field Name E-Vision (M, P, S) NvName Digital State or Value of State User Address E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments MaxClRamp nciAux1SetPt ubMaxClRampS0 Degrees F/Hr 0 to 20 Degrees C/Hr (0 to 11) 6 P X X MaxClRamp is the maximum cool recovery ramp rate in degrees F per hour.
Engineering Units: English (Metric) or States plus Range Default E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments nciAux1SetPt ubOdEnthalpyEnableS2 btu/lb 0 to 65 25 P X X If Config.EconEnable is SINGLE_ENTH, and calculated outdoor enthalpy is less than OdEnthalpyEnable, and outdoor temperature is less than OdEconEnableTemp, then outdoor air is judged suitable to augment mechanical cooling.
Table 21. Control Parameters. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config. Direct Access Map Share Field Name E-Vision (M, P, S) NvName Digital State or Value of State User Address E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments ubKpCoolS2 Degrees F 2 to 30 Degrees C (1 to 30) 5 P X X This is the throttling range for the proportional portion of the PID loop gain for the cooling control loop.
Engineering Units: English (Metric) or States plus Range 0 to 1 Default nviDlcShed DestSchedOcc nviTodEvent CurrentState OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL TodEventNext nviTodEvent NextState OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL Tuncos nviTodEvent uiTimeToNextState minutes 0 to 2880 0 nviBypass value 0 to 100 0 DestBypass nviBypass state SW_OFF SW_ON SW_NUL SrcBypCt nvoBypass value 0 to 100 SrcBypass nvoBypass state SW_OFF SW_ON SW_NUL 78 De
Table 22. Energy Management Points. (Continued) Engineering Units: English (Metric) or States plus Range 0 to 100 DestFree1 nviFree1 state SW_OFF SW_ON SW_NUL nviFree2 value 0 to 100 DestFree2 nviFree2 state SW_OFF SW_ON SW_NUL nviWSHPEnable value 0 to 100 DestWSHPEnable nviWSHPEnable state SW_OFF SW_ON SW_NUL Default 0 0 SW_NUL 1 255 M X X X X Refer to Free1.value. M X X X X Refer to Free2.value. 0 0 SW_NUL 1 255 0 0 SW_NUL 1 255 Comments Free1.
Engineering Units: English (Metric) or States plus Range value 0 to 100 DestTimeClk nviTimeClk state SW_OFF SW_ON SW_NUL SrcTimeClkCt nvoTimeClk value 0 to 100 SrcTimeClk nvoTimeClk state SW_OFF SW_ON SW_NUL Default 0 0 SW_NUL 1 255 0 80 nviTimeClk 0 SW_NUL 1 255 E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments nviTimeClk.value:nviTimeClk allows a time clock at one node to be shared with other nodes over the network.
Table 23. Status Points. Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config. Direct Access Map Share Field Name E-Vision (M, P, S) NvName Digital State or Value of State User Address id[ RTU1 R A four byte ASCII string indicating the type of node (model). O M nroPgmVer major_ver 1 R Software version. O M nroPgmVer minor_ver 0 R Software version. O M nroPgmVer bug_ver 0 R Software version.
Engineering Units: English (Metric) or States plus Range Default E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments alarm_bit[0] Byte Offset = 0 Bit Offset = 2 (SensorFailAlrm) FALSE TRUE 0 1 FALSE alarm_bit[0] Byte Offset = 0 Bit Offset = 2 (SensorFailAlrm) nvoAlarmStatus alarm_bit[0] Byte Offset = 0 Bit Offset = 3 (FrostProtectAlrm) FALSE TRUE 0 1 FALSE alarm_bit[0] Byte Offset = 0 Bit Offset = 3 (FrostProtectAlrm) nvoAlarmStatus alarm_bit[0] Byte Offset = 0 Bit Offset = 4
Table 23. Status Points.
Engineering Units: English (Metric) or States plus Range StatusMode nvoData1 (nvoCtlDataG1) Mode START_UP_WAIT HEAT COOL OFF_MODE DISABLED_MODE EMERG_HEAT SMOKE_EMERGENCY FREEZE_PROTECT MANUAL FACTORY_TEST FAN_ONLY 0 1 2 3 4 5 6 7 8 9 10 StatusOcc nvoData1 (nvoCtlDataG1) EffectOcc OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL StatusOvrd nvoData1 (nvoCtlDataG1) Override StatusSched nvoData1 (nvoCtlDataG1) TimeClckOcc nvoData1 (nvoCtlDataG1) Default START_UP_WAIT E-Vision Legend: (M)
Table 23. Status Points. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config. Direct Access Map Share Field Name E-Vision (M, P, S) NvName Digital State or Value of State User Address E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments NetManOcc OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL 0 OC_NUL 1 2 3 255 X NetManOcc: NetManOcc reports the network manual occupancy state from nviManOcc.
Engineering Units: English (Metric) or States plus Range Default E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments 86 HeatStgsOn nvoData1 (nvoCtlDataG1) HeatStagesOn 0 to 4 0 X HeatStagesOn: HeatStagesOn indicates how many heating stages are on. If the node is controlling a heat pump, HeatStagesOn indicates how many auxiliary heating stages are turned on.
Table 23. Status Points. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config.
Engineering Units: English (Metric) or States plus Range 0 1 Default FALSE X E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments WSHPEnable FALSE TRUE nvoData2 (nvoCtlDataG2) FieldNo UPDATE_ALL_FIELDS BYPASS_TIMER_FIELD TEMP_CONTROL_PT_FIELD SPACE_TEMP_FIELD DISCHARGE_TEMP_FIELD DISCHARGE_SET_PT_FIELD RETURN_TEMP_FIELD RETURN_HUMIDITY_FIELD RETURN_ENTHALPY_FIELD OUTDOOR_TEMP_FIELD OUTDOOR_HUMIDITY_FIELD OUTDOOR_ENTHALPY_FIELD FILTER_PRESSURE_FIELD SPACE_CO2_FIELD MONITOR_VOLTS_FIEL
Table 23. Status Points. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config.
Engineering Units: English (Metric) or States plus Range Default E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments nvoCtlDataG2 siMonitor1S10 volts 1 to 10 SI_INVALID X siMonitor1S10: siMonitor1S10 is the voltage applied at the monitor input terminals. If the sensor is not configured or has failed, the value is SI_INVALID.
Table 23. Status Points. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config. Direct Access Map Share Field Name E-Vision (M, P, S) NvName Digital State or Value of State User Address E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments FALSE TRUE 0 1 FALSE RtnEnthalpyError: All control functions associated with the failed sensor are disabled as if the sensor was not configured.
Engineering Units: English (Metric) or States plus Range Default E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments error_bit[2] Byte Offset = 2 Bit Offset = 5 (nvWindowError) FALSE TRUE 0 1 FALSE WindowError: All control functions associated with the failed NV are disabled as if the NV was not configured.
Table 23. Status Points. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config.
Engineering Units: English (Metric) or States plus Range nciDeviceName Default Test Manual Config. Hardware Config. Direct Access Map Share Field Name E-Vision (M, P, S) NvName Digital State or Value of State User Address E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic NOTE: Physical I/O points that are configurable are in Table 20. Comments ASCII Blanks DeviceName is an 18 character field used to identify the node uniquely as one object at the site or project.
Table 25. Configuration Parameters. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config. Direct Access Map Share Field Name E-Vision (M, P, S) NvName Digital State or Value of State User Address E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic NOTE: Physical I/O points that are configurable are in Table 20.
Engineering Units: English (Metric) or States plus Range Default E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic NOTE: Physical I/O points that are configurable are in Table 20. Comments nciConfig DisableHeatMinTime FALSE TRUE 0 1 FALSE P X X If DisableHeatMinTime is 0 (FALSE), the heating stages are on or off for a minimum time determined by ubHeatCph (Refer to Table 17 Interstage Minimum Times of the System Engineering Guide).
Table 25. Configuration Parameters. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Manual Config. Hardware Config. Direct Access Map Share nciConfig Field Name E-Vision (M, P, S) OvrdPriority NvName Digital State or Value of State User Address E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic NOTE: Physical I/O points that are configurable are in Table 20.
Engineering Units: English (Metric) or States plus Range Default E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments 98 CoolOccSpt nciTempSetPts occupied_cool (SNVT_temp_setpt) Degrees F 50 to 95 Degrees C (10 to 35) 23 P, M X X The Cooling Occupied Setpoint is used if no wall module setpoint pot is configured as the standard Occupied Cooling Setpoint. Actual Cooling Setpoint can be affected by various control parameters (such as DlcShed, SrcRmtTempSpt, etc.).
Table 26. LONMARK®/Open System Points.
Engineering Units: English (Metric) or States plus Range Default 100 DestRmTemp nviSpaceTemp (SNVT_temp_p) Degrees F 14 to 122 Degrees C (-10 to 50) SI_INVALID X X SrcRmTemp nvoSpaceTemp (SNVT_temp_p) Degrees F 14 to 122 Degrees C (-10 to 50) SI_INVALID X X DestOaTemp nviOdTemp (SNVT_temp_p) Degrees F -40 to 122 Degrees C (-40 to 50) SI_INVALID M X X SrcOaTemp nvoOdTemp (SNVT_temp_p) Degrees F -40 to 122 Degrees C (-40 to 50) SI_INVALID M X X DestOaHum nviOdHum (SNVT_lev_percent)
Table 26. LONMARK®/Open System Points. (Continued) Engineering Units: English (Metric) or States plus Range Default Failure Detect Manual Config. Hardware Config.
Engineering Units: English (Metric) or States plus Range nvoUnitStatus in_alarm (SNVT_hvac_status) FALSE TRUE ALARM_NOTIFY_DISABLED 0 FALSE 1 255 nviInUse(unsigned long) 0 To 65535 0 to FFFF nvoStatus object_id (SNVT_obj_request) 0 to 65535 0 nvoStatus invalid_id (SNVT_obj_request) FALSE TRUE 0 1 FALSE If Request.Object_id is not a valid object, invalid_id is set to 1 (TRUE) otherwise it is set to 0 (FALSE). nvoStatus invalid_request (SNVT_obj_request) FALSE TRUE 0 1 FALSE If Request.
Table 26. LONMARK®/Open System Points. (Continued) Failure Detect Manual Config. Hardware Config. Direct Access Map Share Engineering Units: English (Metric) or States plus Range Digital State or Value of State E-Vision (M, P, S) E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic nvoStatus electrical_fault (SNVT_obj_request) FALSE TRUE 0 1 FALSE The electrical_fault field is not supported and is set to 0 (FALSE).
Engineering Units: English (Metric) or States plus Range 104 nviWindow (SNVT_switch) value 0 to 100 DestWndw nviWindow (SNVT_switch) state SW_OFF SW_ON SW_NUL SrcWndwCt nvoWindow (SNVT_switch) value 0 to 100 SrcWndw nvoWindow (SNVT_switch) state SW_OFF SW_ON SW_NUL nviEcon (SNVT_switch) value 0 to 100 nviEcon (SNVT_switch) state SW_OFF SW_ON SW_NUL DestEconEnable Default 0 0 SW_NUL 1 255 0 0 SW_NUL 1 255 Comments Window allows the window sensor from another node to be used as the w
Table 26. LONMARK®/Open System Points. (Continued) Engineering Units: English (Metric) or States plus Range SrcEconEnCt nvoEcon (SNVT_switch) value 0 to 100 SrcEconEnable nvoEcon (SNVT_switch) state SW_OFF SW_ON SW_NUL Default 0 0 SW_NUL 1 255 Failure Detect Manual Config. Hardware Config.
Engineering Units: English (Metric) or States plus Range Default 0 1 2 3 4 MODE_ENABLE NORMAL_OP OUT_1_ON OUT_2_ON OUT_3_ON OUT_4_ON OUT_5_ON OUT_6_ON OUT_7_ON OUT_8_ON ALL_OUT_OFF ALL_OUT_ON DISABLE_OUT 0 1 2 3 4 5 6 7 8 9 10 11 NORMAL_OP Comments DestManMode nviManualMode TestMode nviManValue OutDrive TestHCPos nviManValue sbManHeatCoolPosS0 percentage -127 to 127 0 X During MANUAL mode, ManHeatCoolPos sets the modulating position of the heating or cooling motor (if configured) to the spe
Table 27. Direct Access And Special Points. (Continued) Engineering Units: English (Metric) or States plus Range Default Test Direct Access Map Share Field Name E-Vision (M, P, S) NvName Digital State or Value of State User Address E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic Comments 74-2958—1 nviManValue HeatCoolStage1 OFF ON 0 1 OFF X During MANUAL mode, HeatCoolStage1 parameters turn the corresponding heat, or cool stage to on (1) or off (0).
Engineering Units: English (Metric) or States plus Range Default nviOdEnthS7 mA 4 to 20 SI_INVALID X SrcOaEnth nvoOdEnthS7 mA 4 to 20 SI_INVALID M X SrcMonSwCt nvoMonSw value 0 to 100 0 SrcMonSw nvoMonSw state SW_OFF SW_ON SW_NUL nviIaqOvr value 0 to 100 DestIaqOvrd nviIaqOvr state SW_OFF SW_ON SW_NUL SrcIaqOvrCt nvoIaqOvr value 0 to 100 SrcIaqOvr nvoIaqOvr state SW_OFF SW_ON SW_NUL 108 DestOaEnth 0 SW_NUL 1 255 X X X M 0 0 SW_NUL 1 255 Comments X nviOdEnth allow
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Approximate Memory Size Estimating Procedure. Appendix D. Q7750A Excel 10 Zone Manager Point Estimating Guide. 1. Determine the number of points per controller required at the Central (for example, XBS). Memory size approximation is shown below: (all sizes in bytes) NOTE: All remaining points that are not mapped can be accessed through the Direct Access feature. When memory size is less than 110,000 bytes, the size is OK.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Appendix E. Sensor Data for Calibration. Sensor Use: Return Air, Discharge Air Temperature Resistance Sensors. Table 30 lists the points for Sensor Resistance versus Temperature. Fig. 53 shows the graph of these points. Sensor Type: C7100A, (and C7170A) Table 30. Sensor Resistance Versus Temperature. Sensor Use: Discharge air, Outdoor air Table 29 lists the points for Sensor Resistance versus Temperature. Fig. 52 shows the graph of these points.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 31. Sensor Resistance Versus Temperature. °F Above and Below Setpoint Resistance Ohms °F Resistance Ohms -4 8651.06 40 9961.09 -3 8605.79 45 9700.90 -2 8560.52 50 9440.72 -1 8515.25 55 9180.53 0 8469.98 60 8920.35 1 8424.71 65 8660.16 2 8379.45 70 8399.98 3 8334.18 75 8139.79 4 8288.91 80 7879.61 5 8243.64 85 7619.42 6 8198.37 90 7359.24 7 8153.10 95 7099.06 8 8107.83 100 6838.87 9 8062.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER SENSOR VOLTAGE VERSUS HUMIDITY PERCENTAGE SENSOR RESISTANCE VERSUS TEMPERATURE 8900 8800 8700 OHMS VOLTS 8600 10.00 9.50 9.00 8.50 8.00 7.50 7.00 6.50 6.00 5.50 5.00 4.50 4.00 3.50 3.00 2.50 10 15 8500 8400 8300 8200 8100 8000 55 60 65 70 DEGREES F 75 80 85 20 25 30 35 M11608 Fig. 56. Graph of Sensor Resistance versus Temperature. 40 45 50 55 PERCENTAGE 60 65 70 75 80 85 90 M11610 Fig. 57. Graph of Sensor Voltage versus Humidity.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 36 lists the points for Sensor Current versus Enthalpy (volts). Fig. 59 shows the graph of these points. SENSOR CURRENT VERSUS ENTHALPY (VOLTS) Enthalpy (mA) Sensor Current 4 1 5 1.25 6 1.49 7 1.74 8 1.99 9 2.24 10 2.49 11 2.74 12 2.99 13 3.24 14 3.49 15 3.74 16 3.98 17 4.23 18 4.48 19 4.73 20 4.98 ENTHALPY (VOLTS) Table 36. Sensor Current Versus Enthalpy (volts). 5.00 4.75 4.50 4.25 4.00 3.75 3.50 3.25 3.00 2.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER 46 85 90 95 100 105 110 (29) (32) (35) (38) (41) (43) 44 CONTROL CONTROL POINT APPROX.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Sensor Use: CO2 concentration Table 38 lists the points for Sensor Voltage versus input Voltage to A/D. Fig. 63 shows the graph of these points. Table 38. Sensor Voltage Versus Input Voltage To A/D. Table 37 lists the points for Sensor Voltage versus CO2 concentration. Fig. 62 shows the graph of these points. Voltage to A/D Sensor Voltage Table 37. Sensor Voltage Versus CO2 Concentration. 0.00 0.00 CO2 Concentration PPM Sensor Voltage 0.50 0.
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER Table 39. Sensor Voltage (Vdc) Versus Pressure (Inw). Pressure Inw (kPa) SENSOR VOLTAGE VERSUS PRESSURE Sensor Voltage (Vdc) 10.00 0.00 (0.00) 2.00 0.50.(0.13) 2.80 1.00 (0.25) 3.60 8.00 1.50 (0.37) 4.40 7.00 2.00 (0.5) 5.20 2.50 (0.62) 6.00 3.00 (0.75) 6.80 3.50 (0.87) 7.60 3.00 4.00 (1.00) 8.40 2.00 0 4.50 (1.12) 9.20 5.00 (1.25) 10.00 VOLTS (VDC) 9.00 6.00 5.00 4.00 0.50 1.00 1.50 2.00 2.50 INW 3.00 3.50 4.00 4.