Trane 18-EB24D1-19 Assembly instructions

18-EB24D1-19
WCC-IG-19
Installer's Guide
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
Single Packaged Heat Pump, 13 SEER
Convertible, 1½- 5 Ton, R-410A
4WCC3018 through 4WCC3060 4WCX3018 through 4WCX3060
WARNING:
HAZARDOUS VOLTAGE - DISCONNECT POWER and DISCHARGE
CAPACITORS BEFORE SERVICING
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.

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Installer’s Guide
IMPORTANT: Read this entire manual before beginning installation procedures.
Safety Considerations
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 care-
fully. The manufacturer assumes no liability for installations or
servicing performed by unqualified personnel.
WARNING: INDICATES A POTENTIALLY
HAZARDOUS SITUATION WHICH, IF NOT
AVOIDED, COULD RESULT IN DEATH OR
SERIOUS INJURY.
CAUTION: Indicates a potentially hazardous situ-
ation 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.
NOTICE
Warning and Cautions appear at appropriate
locations throughout this guide. Read these
carefully.
SAFETY HAZARD!
Bodily injury can result from high voltage electrical compo-
nents, fast moving fans, and combustible gas. For protection
from these inherent hazards during installation and service,
the electrical supply must be disconnected and the main
gas valve must be turned off. If operating checks must be
performed with the unit operating, it is the technicians re-
sponsibility to recognize these hazards and proceed safely.
▲WARNING
!
SAFETY HAZARD!
This information is for use by individuals having adequate
backgrounds of electrical and mechanical experience. Any
attempt to repair a central air conditioning product may result
in personal injury and/or property damage.The manufacturer
or seller cannot be responsible for the interpretation of this
information, nor can it assume any liability in connection
with its use.
▲WARNING
!
SAFETY HAZARD!
Do not operate the unit without the evaporator fan or coil
access panels in place. Reinstall the access panels after
performing maintenance procedures on the fan. Operating
the unit without the access panels properly installed may
result in severe personal injury or death.
▲WARNING
!
IMPORTANT: Wear appropriate gloves, arm sleeve protectors,
and eye protection when servicing or maintaining this equipment.
▲CAUTION
!
▲CAUTION
!
CONTAINS REFRIGERANT!
SYSTEM CONTAINS OIL AND REFRIGERANT UNDER
HIGH PRESSURE. RECOVER REFRIGERANTTO RELIEVE
PRESSURE BEFORE OPENING SYSTEM. Failure to follow
proper procedures can result in personal illness or injury
or severe equipment damage.
▲CAUTION
!
RECONNECT ALL GROUNDING DEVICES.
All parts of this product that are 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.
▲CAUTION
!
Hot Surface!
Do Not touch top of compressor. May cause minor to severe
burning.
Unit contains R-410A Refrigerant!
R-410A operating pressure exceeds the limit of R-22.Proper
service equipment is required. Failure to use proper service
tools may result in equipment damage or personal injury.
SERVICE
Use only R-410A Refrigerant and approved POE compres-
sor oil.
▲CAUTION
!
Caution must be taken at all times to avoid personal injuries
and/or damage to equipment.

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Installer’s Guide
Introduction
Contents
Safety Considerations 2
Introduction 3
Step 1-Inspect Shipment 3
Step 2-Determine Unit Clearances 4
Step 3-Review Location & Recommendation
Information 16
Step 4-Unit Installation 17
Ground Level Installation 17
Rooftop Installation -- Curb Mounting 17
Covert Horizontal Airflow to Down Airflow 17
Install Full Perimeter Roof Mounting Curb 17
Lifting and Rigging 18
Placing the Unit on the Mounting Curb 18
Rooftop Installation -- Frame Mounting 19
Rooftop Installation -- No Curb/Frame 19
Ductwork Installation 22
Attaching Downflow Ductwork to Roof Curb 22
Attaching Horizontal Ductwork to Unit 22
Condensate Drain Piping 22
Air Filter Installation 22
Electrical Wiring 23
Electrical Connections 23
Electrical Power 23
Disconnect Switch 23
Overcurrent Protection 23
Power Wiring 23
Field Wiring Diagram 24
Control Wiring (Class II) 25
Step 5-Unit Startup 25
Pre-start Quick Checklist 25
Starting the Unit in the Cooling Mode 25
Operating Pressures 25
Voltage Check 25
Cooling Shut Down 25
Starting the Unit in Heating Mode 26
Heating Shutdown 26
Sequence of Operation 26
Demand Defrost Operation 26
Defrost Control 26
Final Installation Checklist 27
Maintenance 27
Owner Maintenance 27
Service Maintenance 27
Cooling Season 27
Heating Season 27
Indoor Fan Motor Speed Tap Setting 27
Read this manual carefully before attempting to install, oper-
ate, or perform maintenance on this unit. Installation and
maintenance should be performed by qualified service techni-
cians only. This unit is listed by Underwriters Laboratory.
Model 2/4WC*3 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 refrig-
erant as shipped.
Extreme mounting kits are available for slab (BAYEX-
MK003A), utility curb (BAYEXMK002B) and perimeter curb
(BAYEXMK001A) mountings.
This guide is organized as follows:
Step 1 - Inspect Shipment
Step 2 - Determine Unit Clearances
Step 3 - Review Location & Recommendation Information
Step 4 - Unit Installation
Step 5 - Unit Startup
Sequence of Operation
Maintenance
Step 1—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, retain the top shipping skid on the unit or
use “spreader bars” as shown on page 20.
2. Check the unit’s nameplate to determine if the unit is cor-
rect 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.
•4WC*3018-036 use model BAYCURB050A.
•4WC*3042-060 use model BAYCURB051A.
5. If the unit is being hoisted, accessory kit BAYLIFT002A is
recommended. It includes a kit of four (4) lifting lugs and
instructions.
NOTE: If practical, install any internal accessories to the
unit at the shop.

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Installer’s Guide
Step 2—Determine Unit Clearances
Figure 1. 4WCC3018 through 4WCC3036 (1 of 3)
Figures 1 through 12 show the unit critical dimensions. Fig-
ures 1 through 6 show the 4WCC3 clearances and Figures 7
through 12 show the 4WCX3 clearances.
NOTE: The view
labeled “Bottom
Side” represents
the Base as viewed
looking up from
underneath the unit.

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Installer’s Guide
Figure 2. 4WCC3018 through 4WCC3036 (2 of 3)

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Installer’s Guide
Figure 3. 4WCC3018 through 4WCC3036 (3 of 3)

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Installer’s Guide
Figure 4. 4WCC3042 through 4WCC3060 (1 of 3)
NOTE: The view
labeled “Bottom
Side” represents
the Base as viewed
looking up from
underneath the unit.

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Installer’s Guide
Figure 5. 4WCC3042 through 4WCC3060 (2 of 3)

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Installer’s Guide
Figure 6. 4WCC3042 through 4WCC3060 (3 of 3)

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Installer’s Guide
Figure 7. 4WCX3018 through 4WCX3036 (1 of 3)
NOTE: The view
labeled “Bottom
Side” represents
the Base as viewed
looking up from
underneath the unit.