Trane COL32491 Instructions de montage

ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES

IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service informa-

tion pack upon completion of work.

Replacement Coils

These instructions do not cover all variations in systems nor provide for every possible contingency to be met in connection with

the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the

purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.

Installer’s Guide

Includes coil models

COL32491, 32492, 32493, 32494, 32495, 32496,

COL32499, 32500, 32501, 32502, 32503, 32504

18-AH77D1-1A-EN

1. Safety

This information is intended for use by individuals

possessing 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 manufacture or seller

cannot be responsible for the interpretation of this

information, nor can it assume any liability in connec-

tion with its use.

Extreme caution should be exercised when opening

the Liquid Line Service Valve. Turn counterclockwise

until the valve stem just touches the rolled edge. No

torque is required.

LIVE ELECTRICAL COMPONENTS!

Failure to follow this warning could result in property

damage, severe personal injury, or death.

Follow all electrical safety precautions when exposed

to live electrical components. It may be necessary to

work with live electrical components during installa-

tions, testing, servicing, and troubleshooting of this

product.

CAUTION

PRESSURIZED REFRIGERANT!

Failure to follow this warning could result in personal

injury.

System contains oil and refrigerant under high pres-

sure. Recover refrigerant to relieve pressure before

opening the system. Do not use non-approved refrig-

erants, refrigerant substitutes, or refrigerant additives.

SHARP EDGE HAZARD!

Failure to follow this caution could result in property

damage or severe personal injury.

Be careful of sharp edges on equipment or any cuts

made on sheet metal while installing or servicing.

CAUTION

RISK OF FIRE!

In systems using flammable refrigerants, observe all

safety instructions and markings with the air handler.

Ensure all safety devices are in place and functional.

To be repaired only by trained professional. Do not

puncture refrigerant tubing. Dispose of properly in ac-

cordance with federal or local regulations..

WARNING!

This product can expose you to chemicals including

lead, which are known to the State of California to

cause cancer and birth defects or other reproductive

harm.

For more information go to www.P65Warning.ca.gov.

COIL IS PRESSURIZED!

• Coil is pressurized with approximately 8-12 psi dry

air and factory checked for leaks.

• Carefully release the pressure by removing the

rubber plug on the liquid line.

• If no pressure is released, check for leaks.

218-AH77D1-1A-EN

3. General Information

These instructions are designed for installing a

replacement coil into a previously installed air handler.

The air handler may be installed in one of the following

orientations: upflow, downflow, horizontal left or

horizontal right.

Actual air handler units and coil configurations may differ

from models depicted.

NOTE: All legacy Apex A and N coils will be replaced with

square-cut A-coils.

Replacement Coil Air Handler Model Retrofit

Accessories

Uncoated Coated

COL32491 COL32492

TEM3A0B18, 24, 30, 36;

TEM4*0B18, 19, 24, 30, 36;

5TEM4B02;

A4AH4P18, P24, P30, P36, E24;

A4AH5E19, A4AH6E19; A5AHC002

Lineset Panels

COL32493 COL32494

TEM3A0C42, 48;

TEM4A0C37, C42, C48;

A4AH4P37, E42A, E48A;

5TEM4D04, D05;

A5AHC004, C005

Horizontal Drain Pan Extension

COL32495 COL32496

TEM4A0B31;

TEM6A0B24, 30;

TEM8A0B24, 30;

5TEM4B03;

5TEM6B02, B03;

A4AH4E30;

A4AH5V24, V30, E31;

A4AH6V24, V30, E31;

A5AHC003;

A5AHV002, V003

Lineset Panels

COL32499 COL32500

TEM3A0C60; TEM4A0C60;

A4AH4E60A;

TEM6A0C48H41SA, 60H51SA;

TEM8A0C48V41DA, 60V51DA;

TEM4B0C37; TEM4A0C43;

TEM6A0C36, 42;

TEM8A0C36, 42;

5TEM4D06;

5TEM6D04, D05;

A4AH6V36, V42, E43;

A4AH4E36, E37, E42B;

A4AH5V36, V42, E43;

A5AHC006;

A5AHV004, V005

Horizontal Drain Pan Extension

Top Baffle Extensions

Lineset Panels

COL32501 COL32502

TEM6A0D48, 60;

TEM8A0D48, 60;

A4AH6V48A1D, V60A1D

26.5” Cabinet Retrofit Kit

Top Baffle Extensions

COL32503 COL32504

TEM4A0C49, 61;

TEM4B0C60;

TEM6A0C48H41SB, 48H41SC, 60H51SB, 60H51SC;

TEM6B0C60,

TEM8A0C48V41DB 48V41DC, 60V51DB, 60V51DC;

TEM8B0C60;

5TEM4D07;

5TEM6D06, D07;

A4AH6E49, E61, V48A1C, V60A1C;

A4AH4E48B, E60B;

A4AH5E49, E61, V48, V60;

A5AHC007;

A5AHV006, V007

Horizontal Drain Pan Extension

Top Baffle Extensions

Lineset Panels

2. Inspection

1. Unpack all components of the replacement coil

assembly.

2. Check carefully for any shipping damage. If any

damage is found, this must be reported immediately

and a claim made against the transportation

company.

3. Check to be sure all components are in the package.

Any missing components should be reported to

your supplier at once and replaced with authorized

components only.

18-AH77D1-1A-EN

“A” coils

Square-cut coils

Figure 1

3.1 Common Preparation Steps

RISK OF FIRE!

In systems using flammable refrigerants, observe all

safety instructions and markings with the air handler.

Ensure all safety devices are in place and functional.

To be repaired only by trained professional. Do not

puncture refrigerant tubing. Dispose of properly in ac-

cordance with federal or local regulations.

1. Pump down or recover the refrigerant in the system.

2. Turn off high voltage power to the unit.

3. Remove the condensate drain lines from the indoor

coil. Be prepared to catch any water that might be in

the drain line and drain pan.

4. Disconnect the refrigerant lines to the indoor coil. Be

sure to protect the refrigerant lines so debris does

not enter the piping system.

5. Remove the air handler’s front panels. Retain all

screws to reinstall panels in a later step.

4. Upflow, Downflow, Horizontal Coil

Installation

4.1 Coil Removal

1. If your air handler is equipped with a refrigerant detec-

tion system sensor, remove and disconnect sensor.

Retain to reinstall in the same position later.

2. Remove the center brace and the two coil retaining

brackets. See Figures 2 and 4.

3. On the “N” coil only, remove the shipping bracket if

present. See Figure 4.

4. Remove coil assembly from the air handler by sliding

assembly outward. See Figure 5.

5. Remove and retain the horizontal drain pan to reinstall

later. See Figure 5.

4.1.1 Downflow Coil Removal

1. For downflow “N” coil replacement, remove lower

horizontal cross brace. See Figure 3.

2. On the “N” coil only, remove the shipping bracket if

present. See Figure 4.

3. Remove coil assembly from the air handler by sliding

assembly outward. See Figure 5.

NOTE: The “N” coil replacement is taller than the “N” coil,

see Figure 19. Some modification may be necessary to the

unit or the return ductwork in downflow applications.

4.1.2 TXV Removal (if equipped)

1. Remove TXV sensing bulb and equalizer fitting.

2. Remove TXV sensing bulb.

3. Loosen and remove TXV outlet fitting from distributor

assembly.

4. Protect the TXV assembly set so that debris does not

enter. Retain to reinstall later.

Figure 2

Figure 3

418-AH77D1-1A-EN

Figure 4

Legacy apex

“N” coils

Figure 5

Figure 7

Figure 6

4.1.3 Orifice Metering Device Removal (if Equipped)

1. Remove the Schrader valve from the equalizer port

using a Schrader removal tool.

2. Loosen and remove copper liquid line tube fitting from

distributor assembly.

3. Remove orifice metering device from inside distributor.

4. Protect Schrader valve and orifice metering device

from debris. Retain both to reinstall later.

4.2 Install Retrofit Kit for 26.5” Wide

Cabinets

This retrofit kit will be installed when it is shipped with the

replacement coil only. This kit is only applicable for 26.5”

wide cabinets.

Kit Contents:

Small Bracket

Qty. 2

Large Bracket

Qty. 1

NOTE: Install the brackets always on the right side of the

coil assembly.

1. Remove kit contents from packaging.

2. Install two (2) small brackets, each on the front and

rear side bottom of the coil assembly. See Figure 6.

3. Install the large bracket between the two (2) small

brackets, align the mounting holes and secure using

the screws supplied with the kit. See Figure 7.

See Figure 8 for the assembled view of the coil assem-

blies.

18-AH77D1-1A-EN

Figure 8

Space between the Coil and

right wall of the unit

4.3 Install Replacement Coil

Note: All legacy Apex A and N coils will be replaced with

square-cut A-coils.

1. Remove replacement coil from packaging.

2. Remove rubber plug from suction line connection.

4.3.1 Reinstall TXV (if previously equipped)

1. Using back-up wrench, remove mechanical fitting

from distributor.

2. Remove existing O-ring from the outlet of the TXV and

replace with the new O-ring supplied with the replace-

ment coil.

3. Install TXV assembly and hand tighten the mechanical

fitting. Use back-up wrench and tighten assembly firmly.

Do not over tighten.

4. Install external equalizer and hand tighten the fitting.

Use back-up wrench and tighten assembly firmly. Do

not over tighten.

5. Install TXV sensing bulb on the suction manifold. Wrap

sensing bulb with the new insulation provided with the

replacement coil. Use tie wrap to secure.

4.3.2 Reinstall Orifice Metering Device (if previously

equipped)

1. Using back-up wrench, remove mechanical fitting from

distributor.

2. Remove existing o-ring from the copper liquid line

tube and replace with the new o-ring supplied with the

replacement coil.

3. Install orifice metering device inside distributor.

4. Install copper liquid line tube on the distributor and

hand tighten the mechanical fitting. Use back-up

wrench and tighten assembly firmly. Do not over

tighten.

5. Reinstall Schrader valve in the external equalizer port

on the suction manifold. Replace cap.

4.3.3 Coil Installation for Upflow Applications

1. Attach the horizontal drain pan to the replacement

coil and slide the assembly into the unit. See Figure

2. Reinstall coil retaining brackets and horizontal

brace(s). See Figure 10.

3. If equipped, reinstall refrigerant sensor in same loca-

tion as before and reconnect. See Figure 10.

4.3.4 Coil Installation for Horizontal Left Applications

Note: Some replacement coils ship with a horizontal

drain pan extension. For horizontal left or right

applications, install horizontal drain pan extension when

applicable. See Figure 11.

1. Attach the horizontal drain pan with extension to the

replacement coil and slide the assembly into the unit.

See Figure 12.

2. When included and applicable, install top baffle

extensions. See Figure 13.

3. Reinstall the coil retaining brackets. See Figure 14.

NOTE:

Replacements for “N” coils will ship with an

additional retaining bracket that will be required for

horizontal left installations.

4. Reinstall horizontal brace(s). See Figure 14.

5. If equipped, reinstall refrigerant sensor in same

location as before and reconnect. See Figure 14.

618-AH77D1-1A-EN

Figure 9

Figure 10

Refrigerant

Sensor

Figure 11

Figure 14

Refrigerant

Sensor

Figure 12

For horizontal installations, Install extensions

on top baffle as shown using included screws

Orient unused holes

over the top baffle

Extensions will extend 1"

from ends of top baffle

and cover the tabs

Holes in top baffle

indicate extensions

should be installed.

NOTE: Not required

when 26.5" retrofit kit

is used.

Figure 13

18-AH77D1-1A-EN

4.3.5 Coil Installation for Horizontal Right

Applications

NOTE: For Horizontal Right applications, ON SOME

MODELS the top panel assembly of the coil must be

rotated for proper condensate management before

installing the replacement coil assembly into the

unit. If the replacement coil models does not have

a gull wing and tabs in the top panel assembly, skip

the Steps 1 to 3.

1. On the right side of the top baffle, position a flat

head screw driver tip underneath the top baffle

flange and pivot the screwdriver downward to

release the front tab. See Figure 15.

2. Repeat for right rear tab to release top baffle

assembly from coil.

3. Rotate the top baffle 180 degree and snap all four

corners to lock in place. See Figures 16 and 17.

4. Remove left side drip rails and screws and reinstall

on the right side. See Figures 16 and 17.

5. Attach the horizontal drain pan with extension to the

replacement coil and slide the assembly into the unit.

See Figure 18.

NOTE: Some replacement coils ship with a

horizontal drain pan extension. For horizontal left

or right applications, install a horizontal drain pan

extension when applicable. See Figure 11.

6. When included and applicable, install top baffle

extensions. See Figure 13.

7. Reinstall the coil retaining brackets and horizontal

brace(s). See Figure 19.

8. If equipped, reinstall refrigerant sensor in same

location as before and reconnect. See Figure 19.

Snap Tab

Feature

Figure 15

Figure 16

Figure 17

Figure 18

818-AH77D1-1A-EN

Refrigerant

Sensor

Figure 20

Figure 21

Refrigerant

Sensor

Wrap tubes with wet

rags when brazing.

Figure 22

4.3.6 Coil Installation for Downflow Applications

1. Slide the replacement coil into the unit. See

Figure 20.

NOTE: Some modifications to the unit or return air duct

work may be required for downflow applications.

2. Reinstall coil retaining brackets. See Figure 21.

NOTE: Step is optional for downflow coil

replacements.

NOTE: For the “N” coils there is only one coil

retaining bracket on the unit. Additional retaining bracket

shipped with the replacement coil.

3. Reinstall lower horizontal brace(s). See Figure 21.

Figure 19

3. Reinstall coil and blower panels.

NOTE: Some replacement coil orders will ship with

multiple replacement line set panels. When neces-

sary, install the applicable panel and discard the

remaining panels.

4. Protect TXV bulb before brazing line set connections.

Important: TXV bulb MUST be protected (wrapped with

wet rag) or removed, while brazing the tubing Overheat-

ing of the sensing bulb will affect the functional charac-

teristics and performance of the comfort coil. See Figure

22.

4. If equipped, reinstall refrigerant sensor in same loca-

tion as before and reconnect. See Figure 21.

About Trane and American Standard Heating and Air Conditioning

Trane and American Standard create comfortable, energy efficient indoor environments for residential applications.

For more information, please visit www.trane.com or www.americanstandardair.com

The manufacturer has a policy of continuous data improvement and it reserves the right to change design and specifications without notice. We are

committed to using environmentally conscious print practices.

18-AH77D1-1A-EN 30 Nov 2023

Supersedes (New)

5. Check the field made brazed connections for leaks.

For systems using flammable refrigerants, use the following

procedure:

After completion of field piping for split systems, the field

pipework shall be pressure tested with nitrogen and then

vacuum tested prior to refrigerant charging, according to

the following requirements:

Pressure test:

• Using dry nitrogen, pressurize the field piping and

indoor coil to the lower of the maximum operating

pressures listed on the name plates of the indoor and

outdoor units (likely 600 psi).

• The test pressure after removal of the pressure source

shall be maintained for at least one (1) hour with no

decrease of pressure indicated by the test gauge, with

the test gauge resolution not exceeding 30 psi.

• Check for leaks by using a soapy solution at each field-

made joint.

Note: Remove nitrogen pressure and repair any leaks

before continuing.

Vacuum test:

Important: Do not open the service valves until the

refrigerant lines and indoor coil leak check and evacu-

ation are complete.

• Evacuate until the micron gauge reads no higher than

350 microns, then close off the valve to the vacuum

pump.

• Observe the micron gauge. Evacuation is complete if

the micron gauge does not rise above 500 microns in

one (1) minute and 150 microns in ten (10) minutes.

• Once evacuation is complete, blank off the vacuum

pump and micron gauge, and close the valve on the

manifold gauge set.

All procedures for charging the system with refrigerant shall

be according to the instructions provided by the manufac-

turer of the outdoor unit.

Important: Under no circumstances shall potential sources

of ignition be used in the searching for or detection of refrig-

erant leaks.

After charging the system, all indoor field-made joints of

the field piping shall be checked for refrigerant leaks using

an electronic leak detector calibrated for R-454B having a

sensitivity of 5 grams per year or better.

Ce manuel convient aux modèles suivants

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