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.

Page 2

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

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.

Page 3

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.

Page 4

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.

Page 5

Installer’s Guide

Figure 2. 4WCC3018 through 4WCC3036 (2 of 3)

Page 6

Installer’s Guide

Figure 3. 4WCC3018 through 4WCC3036 (3 of 3)

Page 7

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.

Page 8

Installer’s Guide

Figure 5. 4WCC3042 through 4WCC3060 (2 of 3)

Page 9

Installer’s Guide

Figure 6. 4WCC3042 through 4WCC3060 (3 of 3)

Page 10

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.

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