Trane COL32491 - User Manual

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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.

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This document is an installer's guide for replacement coils, specifically models COL32491 through COL32496 and COL32499 through COL32504. It provides comprehensive instructions for the safe and proper installation of these coils in various air handler configurations.

Function Description

The replacement coils are designed to be integrated into existing air handler units to facilitate heat exchange in central air conditioning systems. They are crucial components for the refrigeration cycle, enabling the transfer of heat from the indoor air to the refrigerant. The guide covers the installation process for both "A" coils and square-cut coils, which replace legacy Apex A and N coils. The installation instructions are tailored for different air handler orientations: upflow, downflow, horizontal left, and horizontal right, ensuring adaptability across various system setups. The guide also addresses the removal of existing coils, including TXV (Thermostatic Expansion Valve) and orifice metering devices, and the reinstallation of these components with the new coil.

Important Technical Specifications

The guide lists specific replacement coil models and their corresponding air handler models, along with applicable retrofit accessories. For instance, COL32491 and COL32492 are compatible with TEM3A0B18, 24, 30, 36; TEM4*0B18, 19, 24, 30, 36; 5TEM4B02; A4AH4P18, P24, P30, P36, E24; A4AH5E19, A4AH6E19; A5AHC002 air handlers and utilize Lineset Panels as retrofit accessories. Other models like COL32493 and COL32494 work with TEM3A0C42, 48; TEM4A0C37, C42, C48; A4AH4P37, E42A, E48A; 5TEM4D04, D05; A5AHC004, C005 air handlers and require Horizontal Drain Pan Extensions.

A critical technical specification is that the coil is pressurized with approximately 8-12 psi dry air and factory checked for leaks. This pressure must be carefully released by removing the rubber plug on the liquid line during installation. If no pressure is released, it indicates a leak.

The guide also mentions a retrofit kit for 26.5" wide cabinets, which is shipped with the replacement coil and is only applicable for these specific cabinet sizes. This kit includes small brackets (Qty. 2) and a large bracket (Qty. 1) for securing the coil assembly.

Usage Features

The installation process is detailed with multiple steps to ensure correct and safe integration. Key usage features include:

Adaptability to various air handler orientations: The guide provides specific instructions for upflow, downflow, horizontal left, and horizontal right applications, making the coils versatile for different HVAC system layouts.
Inclusion of retrofit accessories: Depending on the coil model and air handler, accessories like Lineset Panels, Horizontal Drain Pan Extensions, Top Baffle Extensions, and a 26.5" Cabinet Retrofit Kit are provided to ensure proper fit and function.
TXV and Orifice Metering Device handling: Instructions cover the careful removal and reinstallation of these critical components, including the use of new O-rings supplied with the replacement coil and proper tightening procedures.
Refrigerant sensor management: If the air handler is equipped with a refrigerant detection system sensor, the guide instructs on its removal and reinstallation in the same position.
Coil assembly modifications for horizontal right applications: For some models, the top panel assembly of the coil must be rotated 180 degrees for proper condensate management, demonstrating the attention to detail for specific installation scenarios.
Protection of TXV bulb during brazing: Emphasizes the importance of protecting the TXV bulb with a wet rag or removing it entirely during brazing to prevent overheating, which could affect the coil's performance.

Maintenance Features

While primarily an installation guide, several aspects touch upon maintenance and safety:

Safety Warnings: The document prominently features multiple warnings:
- WARNING: Risk of Fire! for systems using flammable refrigerants, emphasizing the need to observe safety instructions, ensure safety devices are functional, avoid puncturing tubing, and dispose of refrigerants properly.
- WARNING: Pressurized Refrigerant! highlighting the danger of personal injury due to high-pressure oil and refrigerant, requiring recovery of refrigerant before opening the system and prohibiting non-approved refrigerants.
- WARNING: Live Electrical Components! cautioning about property damage, severe personal injury, or death from live electrical components and the need to follow safety precautions.
- WARNING: Coil is Pressurized! reiterating the need to carefully release pressure from the coil.
- WARNING! regarding exposure to lead, a chemical known to cause cancer and birth defects in California, directing users to www.P65Warning.ca.gov for more information.
- CAUTION: Sharp Edge Hazard! advising caution against sharp edges on equipment or sheet metal during installation or servicing.
- CAUTION: for opening the Liquid Line Service Valve, instructing to turn counterclockwise until the valve stem just touches the rolled edge without applying torque.
Leak Testing: After installation, the guide mandates a pressure test using dry nitrogen (up to 600 psi) and a vacuum test (down to 350 microns) to ensure no leaks in the field-made brazed connections. It specifies observing the micron gauge for pressure rise and using soapy solution for leak detection. For flammable refrigerants, an electronic leak detector calibrated for R-454B with a sensitivity of 5 grams per year or better is required.
Refrigerant Charging: Instructions state that all procedures for charging the system with refrigerant must follow the outdoor unit manufacturer's guidelines.
Professional Installation: The guide implicitly and explicitly emphasizes that repairs and installations should be performed by trained professionals, especially when dealing with flammable refrigerants and complex system components.
Documentation Retention: The document is intended to be customer property and remain with the unit, serving as a reference for future service and maintenance.

The guide is a comprehensive resource for installers, ensuring that replacement coils are installed safely and correctly, contributing to the efficient and reliable operation of central air conditioning systems.

Trane COL32491 Specifications

General

Brand	Trane
Model	COL32491
Category	Industrial Electrical
Language	English