Installation and Maintenance Manual

ManualsBrandsTrane ManualsSplit SystemsTrane RAUJ CAUJ 20 to 120 Tons

SAFETY WARNING

Only qualified personnel should install and service the equipment. The installation, starting up, and

servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific

knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could

result in death or serious injury. When working on the equipment, observe all precautions in the literature

and on the tags, stickers, and labels that are attached to the equipment.

Remote Air-Cooled Condensers

January 2011 CAUJ-SVX01D-EN

Installation, Operation,

and Maintenance

Models A and Later Design Sequences

CAUJ-C20 CAUJ-C40 CAUJ-C80

CAUJ-C25 CAUJ-C50 CAUJ-D10

CAUJ-C30 CAUJ-C60 CAUJ-D12

Summary of content (60 pages)

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Installation, Operation, and Maintenance Remote Air-Cooled Condensers Models CAUJ-C20 CAUJ-C25 CAUJ-C30 A and Later Design Sequences CAUJ-C40 CAUJ-C50 CAUJ-C60 CAUJ-C80 CAUJ-D10 CAUJ-D12 SAFETY WARNING Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.
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Warnings, Cautions and Notices Warnings, Cautions and Notices. Note that warnings, cautions and notices appear at appropriate intervals throughout this manual. Warnings are provide to alert installing contractors to potential hazards that could result in death or personal injury. Cautions are designed to alert personnel to hazardous situations that could result in personal injury, while notices indicate a situation that could result in equipment or property-damage-only accidents.
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Warnings, Cautions and Notices WARNING Proper Field Wiring and Grounding Required! All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. Failure to follow code could result in death or serious injury.
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Table of Contents Model Number Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Unit Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Service and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Fuse Replacement Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fall Restraint - Condenser Section Roof . . . . . . . . . . . . . . . . . . . . . . . . . . Monthly Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Model Number Descriptions 20 to 60 Ton 80 to 120 Ton Digit 1 — Unit Type Digit 1 — Unit Type C C = Condenser = Condenser Digit 2 — Condenser Digit 2 — Condenser A A = Air-Cooled = Air-Cooled Digit 3 — Airflow Digit 3 — Airflow U U = Upflow = Upflow Digit 4 — Development Sequence Digit 4 — Development Sequence J J = Fourth = Fourth Digit s 5,6,7 — Nominal Capacity Digits 5,6,7 — Nominal Capacity C20= C25= C30= C40= C50= C60= C80= D10= D12= 20 Tons 25 Tons 30 Tons 40 Tons
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General Information Unit Inspection As soon as the unit arrives at the job site • Verify nameplate data matches data on sales order and bill of lading (including electrical data). • Verify that the power supply complies with the unit nameplate specifications. • Visually inspect the exterior of the unit, including the roof, for signs of shipping damage. • Check for material shortages. Refer to the Component Layout and Ship with Location illustration.
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General Information The unit control panel contains all required fan cycling controls, compressor interlocks, and a 115 volt control power transformer. Field wiring, electrical schematics and panel connection diagrams are located inside the control panel access door. Figure 1. Unit component layout and ‘shipwith’ locations 20 - 60 ton units Figure 2.
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General Information Table 1. General data 20 Ton Model Number Gross Heat Rejection (MBh)(a) 25 Ton 30 Ton 40 Ton 50 Ton 60 Ton 80 Ton 100 Ton 120 Ton CAUJC-20 CAUJC-25 CAUJ-C30 CAUJ-C40 CAUJ-C50 CAUJ-C60 CAUJ-C80 CAUJ-D10 CAUJ-D12 350 402 456 635 819 4/26"/Prop 6/26"/Prop 1002 1269 1639 2004 Condenser Fan Data Quantity/Fan Dia.
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Dimensions and Weights Unit Clearances Figure 3, p. 11 and Figure 4, p. 11 illustrate the minimum operating and service clearances for either a single, multiple, or pit application. These clearances are the minimum distances necessary to assure adequate serviceability, cataloged unit capacity, and peak operating efficiency. NOTICE: Equipment Damage! Providing less than the recommended clearances may result in condenser coil starvation or recirculation of hot condenser air.
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Dimensions and Weights Figure 3. Typical installation clearances for single, multiple, or pit applications: 20-60 ton units Figure 4.
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Dimensions and Weights Figure 5. 20-ton air-cooled condenser NOTES: 1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES. FAN GRILLE 2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT . 3/4" X 4 MTG HOLES 4 3 1/2" X 4 KO (115V) 1/2" X 2 KO (115V) 5 3/8" 3 3/8" 2 5/8" 5 5/16" CONTROL PANEL 72 1/2" 4 1/2" 3 3/8" 29 1/4" 31 1/4" 1 3/4" KO LOW VOLTAGE (30V MAX.
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Dimensions and Weights Figure 6. 20-ton air-cooled condenser (connections) CONTROL PANEL SIDE NOTES: 1. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH INSTALLER DOCUMENTS BEFORE INSTALLATION 1 3/8" O.D. DISCHARGE LINE SCALE 1,000 7/8" O.D.
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Dimensions and Weights Figure 7. 25- and 30-ton air-cooled condenser NOTES: FAN GRILLE 1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES. 3/4" X 4 MTG HOLES 2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT . 1/2" X 4 KO (115V) 4 3 1/2" X 2 KO (115V) 2 5/8" 5 5/16" 5 3/8" 3 3/8" CONTROL PANEL 4 1/2" 72 1/2" 3 3/8" 88 1/2" 1 3/4" KO LOW VOLTAGE (30V MAX.) 1.
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Dimensions and Weights Figure 8. 25- and 30-ton air-cooled condenser (connections) CONTROL PANEL SIDE NOTES: 1. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH INSTALLER DOCUMENTS BEFORE INSTALLATION CONTROL PANEL SCAL E 1 ,0 00 SC ALE 1.000 7/8" O.D. LIQUID LINE 1 3/8" O.D.
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Dimensions and Weights Figure 9. 40-ton air-cooled condenser FAN GRILLE NOTES: 3/4" X 6 MTG HOLES 1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES. 2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT . 6 5 1/2" X 4 KO (115V) 36 1/8" 1/2" X 2 KO (115V) 5 3/8" 3 3/8" 2 5/8" 5 5/16" 4 CONTROL PANEL 88 9/16" 3 4 1/2" 3 3/8" 36 1/8" 29 1/4" 31 1/4" 1 3/4" KO LOW VOLTAGE (30V MAX.
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Dimensions and Weights Figure 10. 40-ton air-cooled condenser (connections) CONTROL PANEL SIDE 27" NOTES: 1. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH INSTALLER DOCUMENTS BEFORE INSTALLATION 27 7/16" 7/8" O.D. LIQUID LINE 10 1/2" 49 1/2" 1 3/8" O.D. DISCHARGE 1 3/8" O.D. DISCHARGE 41 7/8" CONTROL PANEL 2 7/8" 27" 27 7/16" CONTROL PANEL SIDE VOLTAGE ACCESS 7/8" O.D.
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Dimensions and Weights Figure 11. 50-ton air-cooled condenser NOTES: 1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES. 2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT . FAN GRILLE 1/2" X 4 KO (115V) 3/4" X 6 MTG HOLES 6 5 1/2" X 2 KO (115V) 2 5/8" 5 5/16" 5 3/8" 3 3/8" CONTROL PANEL 48 7/8" 4 1/2" 3 3/8" 4 3 29 1/4" 1 3/4" KO LOW VOLTAGE (30V MAX.
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Dimensions and Weights Figure 12. 50-ton air-cooled condenser (connections) CONTROL PANEL SIDE NOTES: 1. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH INSTALLER DOCUMENTS BEFORE INSTALLATION LIQUID LINE 61 3/16" 27 7/16" 10 13/16" 74 7/16" S CAL E 1, 000 1 3/8" O.D. DISCHARGE LINE 67 3/8" CONTROL PANEL SIDE 10 13/16" VOLTAGE ACCESS CONTROL PANEL 27 7/16" ORIENTATION VIEW OF UNIT 61 3/16" 7/8" O.D.
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Dimensions and Weights Figure 13. 60-ton air-cooled condenser NOTES: 1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES. FAN GRILLE 2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT . 3/4" X 6 MTG HOLES 1/2" X 4 KO (115V) 5 6 1/2" X 2 KO (115V) 5 3/8" 3 3/8" 2 5/8" 5 5/16" CONTROL PANEL 48 7/8" 4 1/2" 3 3/8" 4 3 1 3/4" KO LOW VOLTAGE (30V MAX.
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Dimensions and Weights Figure 14. 60-ton air-cooled condenser (connections) CONTROL PANEL SIDE NOTES: 1. VERIFY WEIGHT, CONNECTION, AND ALL DIMENSION WITH INSTALLER DOCUMENTS BEFORE INSTALLATION LIQUID LINE 61 3/16" 27 7/16" 10 13/16" 74 7/16" S CA LE 1, 00 0 1 3/8" O.D. DISCHARGE LINE 67 3/8" CONTROL PANEL SIDE 10 13/16" VOLTAGE ACCESS CONTROL PANEL 27 7/16" ORIENTATION VIEW OF UNIT 61 3/16" 7/8" O.D.
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Dimensions and Weights Figure 15. 80-ton air-cooled condenser NOTES: FAN GRILLE 8 3/4" X 8 MTG HOLES 1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES. 2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT . 7 1/2" X 4 KO (115V) 72 1/8" 1/2" X 2 KO (115V) 5 3/8" 3 3/8" 2 5/8" 6 5 4 3 5 5/16" CONTROL PANEL 176 11/16" 16" 4 1/2" 3 3/8" 4" CONDUIT MAIN POWER 29 1/4" 1 3/4" KO LOW VOLTAGE (30V MAX.
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CAUJ-SVX01D-EN 14 1/16" COIL 7 5/16" DISCHARGE LINE 3 5/16" CONTROL PANEL SIDE 19 1/16" SCAL E 1,0 00 CONNECTION DRAWING PLAN VIEW OF UNIT 136 9/16" 1 1/8" O.D. LIQUID LINE CONNECTION DRAWING CONTROL PANEL SIDE VIEW OF UNIT 48 3/8" 21 11/16" LIQUID LINE 5 9/16" 1 5/8" DISCHARGE LINE CONTROL PANEL VOLTAGE ACCESS ISOMETRIC DRAWING ORIENTATION VIEW OF UNIT CONTROL PANEL SIDE 3 5/16" Dimensions and Weights Figure 16.
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Dimensions and Weights Figure 17. 100- and 120-ton air-cooled condenser NOTES: 1. SEE CONNECTION DRAWING FOR CONNECTION LOCATION AND SIZES. 2. LOW AMBIENT DAMPER ONLY COMES WITH SELECTED UNIT . FAN GRILLE 3/4" X 8 MTG HOLES 1/2" X 4 KO (115V) 1/2" X 2 KO (115V) 97 5/8" 2 5/8" 5 5/16" 5 3/8" 3 3/8" CONTROL PANEL 4 1/2" 3 3/8" 29 1/4" 16" 31 1/4" 1 3/4" KO LOW VOLTAGE (30V MAX.
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CAUJ-SVX01D-EN 4 1/4" S C A LE 1, 00 0 C ONNE C T ION DR AW ING 1 1/8" O.D. LIQUID LINE 162" 5 9/16" LIQUID LINE C OIL C ONNE C T ION DR AWING P LAN V IE W OF UNIT 90 1/8" C ONT R OL P ANE L S IDE V IE W OF UNIT 7 5/16" DIS C HAR G E LINE 13 1/16" C ONT R OL P ANE L S IDE 18 1/16" 21 3/8" C ONT R OL P ANE L V OLT AG E AC C E S S IS OME T R IC DR AWING OR IE NT AT ION V IE W OF UNIT C ONT R OL P ANE L S IDE 4 5/16" Dimensions and Weights Figure 18.
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Dimensions and Weights Weights Table 2. 20 to 120 ton weights and point load data Weight Tons Model 20 CAUJC20 1163 25 CAUJC25 30 40 CG Locations Shipping Operating Weight on isolator mounting location (lbs.) X Y Loc. 1 Loc. 2 Loc 3. Loc 4. Loc. 5 Loc. 6 Loc. 7 Loc. 8 1188 41.5 32.5 296.3 340.8 358.8 192.1 --- --- --- --- 1213 1238 41.9 32.2 357.1 300.2 318.8 261.9 --- --- --- --- CAUJC30 1211 1236 41.5 32.3 360.9 302.0 316.0 257.
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Installation Rigging and Center-of-Gravity Data A Rigging illustration and Center-of-Gravity dimensional data table is shown in Figure 20, p. 28, Figure 21, p. 28, and Table 2, p. 26. See Table 2, p. 26 for typical unit operating weights table before proceeding. WARNING Improper Unit Lift! Test lift unit approximately 24 inches to verify proper center of gravity lift point. To avoid dropping of unit, reposition lifting point if unit is not level.
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Installation Figure 20. Rigging and center-of-gravity data: 20-60 ton units Y Figure 21. Rigging and center-of-gravity data: 80-120 ton units Y Unit Isolation To minimize unit sound and vibration transmission, us one of the following installation methods: 1. Install the unit directly on an isolated (detached) concrete pad or on isolated concrete footings located at each unit load point. 2. Install the optional spring isolators at each mounting location.
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Installation Neoprene Isolators (available for 20-60 ton units only) Install the neoprene isolators at each unit mounting (load) point, using the following procedure: 1. Elevate the unit (one side at a time) to allow access to the base rail mounting holes. Note: Use solid type blocks, i.e. 4" X 4" wood blocks or similar material to prevent collapsing. Keep hands and other body limbs clear of elevated base rail while installing isolators to prevent personal injury. 2.
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Installation Spring Isolators (available for 20-120 ton units) Install the spring isolators at each unit mounting (load) point using the following procedure: 1. Elevate the unit (one side at a time) to allow access to the base rail mounting holes. Note: Use solid type blocks, i.e. 4" X 4" wood blocks or similar material to prevent collapsing. Keep hands and other body limbs clear of elevated base rail while installing isolators to prevent personal injury. 2.
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Installation Leveling the Unit Before tightening the mounting bolts, level the unit carefully. Use the unit base rail as a reference. Level the unit to within 1/4 inch over its entire length. Use shims if adjustable isolators (neoprene) are not used. If adjustable isolators (spring) are used, ensure that the proper isolator housing clearance is maintained while leveling the unit. Isolators are identified by color and/or an isolator part number.
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Installation Field Installed Control Wiring • Verify the Control transformer (1T1) is wired for the proper operating voltage. • Install the interlock circuitry wiring between the unit and the appropriate compressor unit to permit condenser fan operation when the compressor starter auxiliary contacts closes. Refer to the Field Connection Diagram that shipped with the unit for interlocking information.
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Installation Liquid Line Components Filter driers and valves (expansion valves, charging valves, etc.) should be provided in the liquid lines just before the evaporator. Minimize the use of valves, reducers and tube bends as much as possible to avoid excessive pressure drop before the expansion valve. Liquid Line Filter Drier Install the filter driers (provided by the installer) in the liquid lines as close as possible to the expansion valves.
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Installation Table 6. Valve selections Capacity Bleed 0 15% 30% 34 Applicable Units Any BPHE or any Fin and Tube OK Coils 80-120 MCHE 20-60T MCHE Selection Minimum BBIZE-1-1/2-GA 2 Maximum 2 BBIZE-2-GA 2 3 BBIZE-3-GA 2.5 4 BBIZE-4-GA 3.5 5.5 BBIZE-5-GA 4.5 6.5 BBIZE-6-GA 5.5 7.5 10.5 BBIZE-8-GA 6.5 BBIZE-12-1/2-GA 8.5 13.5 BBIZE-15-GA 11 16.5 OZE-20-GA 13 22 OZE-25-GA 17 26 OZE-35-GA 20.5 39 OZE-50-GA 30.5 59 OZE-60-GA 45.
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Installation Discharge (Hot Gas) Lines Discharge lines should be pitched downward 1/2 inch for each 10 feet of horizontal run in the direction of hot gas flow and away from the compressor. Insulate any portion of the discharge piping that is exposed to outdoor ambient temperature. Discharge line sizing is based on minimum velocity required for good oil movement in system.
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Installation Final Refrigerant Pipe Connections To access the refrigerant pipe connections, remove the louvered side grills. Refer to Figure 5, p. 12 through Figure 18, p. 25. These condensing units are shipped with a Nitrogen holding charge. Install pressure gauges to the appropriate access valve(s) and take a reading. If no pressure is present, refer to the “Leak Testing Procedure” section. If pressure is present, relieve the pressure before attempting to unsweat the “seal” caps.
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Installation Leak Testing Procedure WARNING Hazard of Explosion! Never use an open flame to detect gas leaks. It could result in an explosion. Use a leak test solution for leak testing. Failure to follow recommended safe leak test procedures could result in death or serious injury or equipment or property-only-damage. WARNING Hazard of Explosion! Use only dry nitrogen with a pressure regulator for pressurizing unit.
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Installation Field Installed Power Wiring WARNING Proper Field Wiring and Grounding Required! All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. Failure to follow code could result in death or serious injury.
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Installation Table 8. Customer connection wire range: 20-60 ton units Customer wire selection and fuse replacement Power Wire Selection to Main Terminal Block (1TB1) Unit Voltage Terminal Block Size Connector Wire Range All 175A (1) #14-2/0 Control Wire Selection to Control Terminal Block (1TB2) “See Note 6" Wire Gauge OHMS per 1000 Feet 18 8 16 5 14 3 12 2 Table 9.
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Installation Power Wire Sizing and Protection Device Equations To correctly size the main power wiring for the unit, use the appropriate calculation(s) listed below. Read the load definitions that follow and use Calculation #1 for determining the MCA (Minimum Circuit Ampacity), MOP (Maximum Over current Protection), and RDE (Recommended Dual Element fuse size) for each unit. Use Calculation #2 to determine the DSS (Disconnect Switch Size) for each unit.
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Installation Field Installed Control Wiring WARNING Proper Field Wiring and Grounding Required! All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state electrical codes. Failure to follow code could result in death or serious injury.
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Installation Electrical Data Table 10. Electrical data Unit Characteristics Condenser Fan Motor Model No. Electrical Characteristics Allowable Voltage Range Minimum Circuit Ampacity (3),(5) 20 CAUJ-C20G CAUJ-C204 CAUJ-C205 200-230/60/3 460/60/3 575/60/3 180-220/208-254 416-508 520-635 9.2 4.1 3.2 15 15 15 2/1.0 2/1.0 2/1.0 4.1 1.8 1.4 20.7 9.0 7.2 0.9 0.9 0.9 25 CAUJ-C25G CAUJ-C254 CAUJ-C255 200-230/60/3 460/60/3 575/60/3 180-220/208-254 416-508 520-635 13.3 5.9 4.6 20 15 15 3/1.
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Operating Principals Standard air cooled condensers function as the outdoor condensing units for appropriately sized split refrigeration systems. These units, operating in conjunction with a matched indoor compressor/evaporator configuration, provide refrigerant condensing for these systems down to a normal ambient temperature of 40º F. Operation to 0º F ambient is possible with the addition of externally mounted low ambient dampers. All condenser fans are direct drive, 26 inch propeller type.
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Operating Principals 80-120 Ton Specs Condenser fan cycling is accomplished through interlocking the fan operation with compressor operation (6K1 & 6K2), and ambient temperature thermostats (1S42 & 1S43) are used to provide additional fan cycling control. Table 12, p. 44 lists the condenser fan sequencing data and Figure 28, p. 50 illustrates the condenser fan locations with their respective fan and relay designators. Table 12.
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System Pre-Start Procedures Use the checklist provided below in conjunction with the “General Unit Requirement” checklist” to ensure that the unit is properly installed and ready for operation. Be sure to complete all of the procedures described in this section before starting the unit for the first time. WARNING Hazardous Voltage! Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized.
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System Pre-Start Procedures The lines used to connect the pump to the system should be copper and of the largest diameter that can practically be used. Using larger line sizes with minimum flow resistance can significantly reduce evacuation time. Rubber or synthetic hoses are not recommended for system evacuation because they have moisture absorbing characteristics which result in excessive rates of evaporation, causing pressure rise during the standing vacuum test.
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System Pre-Start Procedures Figure 25. Typical vacuum pump hookup Figure 26. Evacuation time vs. pressure rise 1600 Continuously increasing pressure indicates the presence of leaks, moisture or both. PRESSURE IN MICRONS 1400 1200 State of equilibrium indicates the true amount of moisture left in the system. It indicates that no leaks are present, but further evacuation is required. 1000 800 600 400 State of equilibrium indicates the true amount of moisture left in the system.
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System Pre-Start Procedures Voltage Imbalance Excessive three phase voltage imbalance between phases will cause motors to overheat and eventually fail. The maximum allowable voltage imbalance is 2%.
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Start-Up Low Ambient Damper Operation Low Ambient Dampers are available as a factory installed option or can be field-installed. Dampers are used to extend the operation of these units from the standard operational temperatures to a minimum of 0º F without hot gas bypass or 10º F with hot gas bypass. (These values apply when wind speed across the condenser coil is less than 5 m.p.h.). If typical wind speeds are higher than 5 m.p.h., a wind screen around the unit may be required.
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Start-Up approximately 73º F. The second stage opens when the ambient temperature approaches 45º F and closes at approximately 53º F. Figure 28. Condenser fan locations: 80-120 ton units 4B4 4B1 CAUJ 80 Ton 4B6 4B3 5B6 5B3 CAUJ 100 & 120 Ton Verifying Proper Condenser Fan Rotation WARNING Rotating Components! The following procedures involve working with rotating components. Disconnect all electric power, including remote disconnects before servicing.
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Start-Up Note: Interchanging “Load” side power wires at the fan contactors will only affect the individual fan rotation. Ensure that the voltage phase sequence at the main terminal block 1TB1 is ABC as outlined in the “Electrical Phasing” section. Some Fans are Rotating Backwards; 1. “Open” the field supplied disconnect switch upstream of the unit. Lock the disconnect switch in the “Open” position while working at the unit. 2.
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Start-Up To check damper operation, jumper between the sensor input terminals 6 and 7 and/or 11 and 12 (if applicable). Controller output signal will go to 10 VDC and the damper will drive to the full open position. Charging the System 1. Verify that all discharge service valves and liquid line service valves for each circuit is back seated. 2. Attach a set of service gauges onto the liquid line and discharge line gauge ports for each circuit. 3.
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Start-Up Table 14. Recommended refrigerant capacities Unit Size Operating Charge per Circuit1 Condenser Storage Capacity2 C30 12 19 C40 11 24 C50 12 25 C60 13 32 C80 29 47 D10 30 50 D12 33 63 Notes: 1. CAUJ-C20 - C30 are single-circuit units; CAUJ-40 - C60 are dual-circuit units; CAUJ 80-120 are dualcircuit units 2. Pounds R-410A per circuit @ 95°F ambient, 95% full Table 15. Liquid line & drier refrigerant requirements Liquid Line O.D.
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Service and Maintenance Fuse Replacement Data Table 17. Fuse replacement selection: 20-60 ton units Fuse Description Unit Size Control Ckt Fuse (1F7) Unit Voltage Fuse Type 200/230 Volt Condenser Fan Fuse (1F1-1F3 on 20-30 ton) (1F1-1F6 on 40-60 ton) Fuse Size 25 AMP All 460/575 Volt 380/415 Volt RK5 20-30 ton All FNQ-R 3.20 AMP 40-60 ton All FNQ-R 6.25 AMP All All ABC-6 6 AMP Compr Protector Fuse (1F8 on 20-60 ton) (1F9 on 40-60 ton) 15 AMP Table 18.
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Service and Maintenance Monthly Maintenance Air Handling Equipment WARNING Hazardous Voltage! Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury. Before completing the following checks, turn the system control circuit switch 1S2 and 5S1 to the “Off” position.
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Service and Maintenance • Inspect the condenser coils for dirt and foreign debris. If the coils appear dirty, clean them according to the instructions described in the “Coil Cleaning” section. • Inspect the compressor and condenser fan motor contactors. If the contacts appear severely burned or pitted, replace the contactor. Do not clean the contacts. • Check the compressor oil level.
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Service and Maintenance To clean refrigerant coils, use a soft brush and a sprayer. Note: DO NOT use detergents with microchannel condenser coils. Pressurized water or air ONLY. 1. Remove enough panels from the unit to gain safe access to coils.. WARNING No Step Surface! Do not walk on the sheet metal drain pan. Walking on the drain pan could cause the supporting metal to collapse, resulting in the operator/technician to fall. Failure to follow this recommendation could result in death or serious injury.
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Warranty and Liability Clause COMMERCIAL EQUIPMENT RATED 20 TONS AND LARGER AND RELATED ACCESSORIES PRODUCTS COVERED - This warranty* is extended by American Standard Inc. and applies only to commercial equipment rated 20 Tons and larger and related accessories.
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Wiring Diagrams Note: For easier access, published unit wiring diagrams (individual, separate diagrams for unitary product lines) will become available via e-Library instead of through wiring manuals after 2007.
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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.