Trane 2/4WCC30 Series, 2/4WCX30 Series, 2WCC3018A, 4WCC3018A, 2WCC3060A Installer's Manual
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18-EB24D1-1
Installer's Guide
Single Package Heat Pump, 13 SEER
Convertible, 1½ - 5 Ton, R-22/R-410A
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
Important — This Document is customer property. Please return to service information pack and give this Installer's Guide to the homeowner
upon completion of work.
2/4WCC3018A through 2/4WCC3060A
WARNING:
HAZARDOUS VOLTAGE - DISCONNECT POWER and DISCHARGE
CAPACITORS BEFORE SERVICING
2/4WCX3018A through 2/4WCX3060A
Installer’ s Guide
Safety Considerations
IMPORTANT: Read this entire manual before beginning installation procedures.
Read this manual carefully before attempting to install, operate, or
perform maintenance on this unit. Installation and maintenance
should be performed by qualified service technicians only.
Note: "Warnings" and "Cautions" appear at appropriate places
in this manual. Your personal safety and the proper operation
of this air conditioning product require that you follow them
carefully. The manufacturer assumes no liability for installations or servicing performed by unqualified personnel.
NOTICE
Warning and Cautions appear at appropriate
locations throughout this guide. Read these
carefully .
WARNING: Indicates a potentiall y hazardous situation which, if not avoided, could result in death or
serious injury .
CAUTION: Indicates a potentially hazar dous situation which, if not avoided, may result in minor or
moderate injury. It may also be used to alert against
unsafe practices and where property-damage-only
accidents could occur.
IMPORTANT: RECONNECT ALL GROUNDING DEVICES.
ALL PARTS OF THIS PRODUCT CAPABLE OF CONDUCTING
ELECTRICAL CURRENT ARE GROUNDED. IF GROUNDING
WIRES, SCREWS, STRAPS, CLIPS NUTS OR WASHERS
USED TO COMPLETE A PATH TO GROUND ARE REMOVED
FOR SERVICE, THEY MUST BE RETURNED TO THEIR ORIGINAL POSITION AND PROPERLY FASTENED.
W ARNING: DO NOT OPERATE THE UNIT WITH-
OUT THE EVAPORATOR FAN ACCESS PANEL OR EVAPORATOR COIL ACCESS PANEL IN PLACE. REINSTALL THE
ACCESS PANELS AFTER PERFORMING MAINTENANCE
PROCEDURES ON THE FAN. OPERATING THE UNIT WITHOUT THE ACCESS PANELS PROPERLY INSTALLED MAY
RESUL T IN SEVERE PERSONAL INJURY OR DEATH.
NOTICE: W ear appropriate gloves,arm sleeve protectors,
and eye protection when servicing or maintaining this
equipment.
Page 2
Installer’ s Guide
Contents
Safety Considerations 2
Introduction 3
Step 1-Inspect Shipment 3
Step 2-Determine Unit Clearances 4
Step 3-Review Location and Recommendation
Information 12
Step 4-Unit Installation 13
Ground Level Installation 13
Rooftop Installation -- Curb Mounting 13
Covert Horizontal Airflow to Down Airflow 13
Install Full Perimeter Roof Mounting Curb 13
Lifting and Rigging 13
Placing the Unit on the Mounting Curb 14
Rooftop Installation -- Frame Mounting 14
Ductwork Installation 17
Attaching Downflow Ductwork to Roof Curb 17
Attaching Horizontal Ductwork to Unit 17
Condensate Drain Piping 17
Air Filter Installation 18
Electrical Wiring 18
Electrical Connections 18
Electrical Power 18
Disconnect Switch 18
Overcurrent Protection 18
Pow er Wiring 18
Field Wiring Diagram 19
Control Wiring (Class II) 20
Step 5-Unit Startup 20
Pre-start Quick Checklist 20
Starting the Unit in the Cooling Mode 20
Operating Pressures 20
Voltage Check 20
Cooling Shut Down 20
Starting the Unit in Heating Mode 21
Heating Shutdown 21
Sequence of Operation 20
Demand Defrost Operation 21
Defrost Control 21
Final Installation Checklist 22
Maintenance 22
Owner Maintenance 22
Condenser Coil 22
Service Maintenance 22
Cooling Season 22
Heating Season 22
Indoor Fan Motor Speed Tap Setting 22
Warranty Information 24
Introduction
Read this manual carefully before attempting to install, operate,
or perform maintenance on this unit. Installation and maintenance
should be performed by qualified service technicians only. This
unit is listed by Underwriters Laboratory.
Model WC heat pump units are designed for outdoor mounting
with a vertical condenser discharge. They can be located either
at ground level or on a roof in accordance with local codes. Each
unit contains an operating charge of refrigerant as shipped.
Extreme mounting kits are available for slab (BAYEXMK002AA)
and curb (BAYEXMK003AA) mountings.
The indoor fan motor speed tap setting is provided in the
Maintenance section.
This guide is organized as follows:
Step 1-Inspect Shipment
Step 2-Determine Unit Clearances
Step 3-Review Location and Recommendation Information
Step 4-Unit Installation
Step 5-Unit Startup
Sequence of Operation
Maintenance
Step1—Inspect Shipment
1. Check for damage after the unit is unloaded. Report
promptly to the carrier any damage found to the unit. Do not
drop the unit.
Important: To prevent damage to the sides and top of
the unit when hoisting, the use of “spreader bars” is
recommended.
2. Check the unit’s nameplate to determine if the unit is correct
for the intended application. The power supply must be
adequate for both the unit and all accessories.
3. Check to be sure the refrigerant charge has been retained
during shipment. Remove the Compressor access panel to
access the 1/4" flare pressure taps.
4. If this unit is being installed on a curb, verify that the correct
curb is provided with the unit.
• WC~3018 through WC~3036 use the small cabinet,
Model BAYCURB050A.
• WC~3042 through WC~3060 use the large cabinet,
Model BAYCURB051A.
5. If the unit is being hoisted, accessory kit BAYLIFT002AA is
recommended. It includes a kit of four (4) lifting lugs and
instructions.
Page 3
Installer’ s Guide
Step2—Determine Unit Clearances
Figures 1 to 8 show the unit critical dimensions. Figures 2 and 4
show the WCC clearances and Figures 6 and 8 show the WCX
clearances.
Figure 1.
Page 4
RETURN
WCC3018A through WCC3036A (1 of 2)
SUPPLY
Installer’ s Guide
903.29
[35-9/16]
36 [79]
36 [79]
36 [79]
36 [78]
36 [78]
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57 [125]
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61 [134]
40 [88]
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41 [89]
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41 [91]
25 [56]
25 [56]
25 [56]
26 [56]41 [89]
26 [56]
26 [58]
26 [57]
27 [60]43 [94]
SUPPLY
158 [348]
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161 [354]
158 [348]
162 [357]
162 [358]
169 [372]
RETURN
635 [25.0]
635 [25.0]
635 [25.0]
635 [25.0]
635 [25.0] 515.6 [20.3]
635 [25.0] 515.6 [20.3]
635 [25.0]
635 [25.0]
508 [20.0]
508 [20.0]
508 [20.0]
508 [20.0]
508 [20.0]
508 [20.0]
Figure 2.
WCC3018A through WCC3036A (2 of 2)
Page 5
Installer’ s Guide
Figure 3.
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RETURN
WCC3042A through WCC3060A (1 of 2)
SUPPLY
Installer’ s Guide
954.10 [37-9/16]
1004.90 [39-9/16]
954.10 [37-9/16]
1055.70 [41-9/16]
1004.90 [39-9/16]
41 [90]
47 [105]
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62 [137]
76 [168]
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63 [138]
66 [146]
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80 [177]
79 [175]
46 [102]
58 [127]
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46 [102]
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61 [134]
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30 [67]
36 [79]
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SUPPLY
179 [395]
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RETURN
673.1 [26.5]
685.8 [27.0]
698.5 [27.5]
668.02 [26.3]
668.02 [26.3]
698.5 [27.5]
698.5 [27.5]
698.5 [27.5]
629.92 [24.8]
635 [25.0]
635 [25.0]
629.92 [24.8]
629.92 [24.8]
635 [25.0]
635 [25.0]
635 [25.0]
Figure 4
WCC3042A through WCC3060A (2 of 2)
Page 7
Installer’ s Guide
Figure 5
Page 8
RETURN
WCX3018A through WCX3036A (1 of 2)
SUPPLY
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