American Standard 2/4TEC3F18A1000A

To Next Page

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 information

pack upon completion of work.

HAZARDOUS VOLTAGE - DISCONNECT POWER BEFORE SERVICING

WARNING:

Installer’s Guide

General Information 1

Installation Limitations & Recommendations 1-3

Unit Installation 3-4

Upflow 3

Downflow 3-4

Horizontal Left 4

Horizontal Right 4

Duct Connections 5

Refrigerant Piping 5

Condensate Drain Piping 5-6

Electrical — Power Wiring 6

Control Wiring 7

Checkout Procedure 11-12

Hook-up Diagrams 7-8

Outline Drawings 9-10

Contents

A. GENERAL INFORMATION

WARNING

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 PROP-

ERTY 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.

CAUTION

To prevent shortening its service life, the air handler

should not be used during the finishing phases of

construction. The low return air temperatures can lead

to the formation of condensate. Condensate in the

presence of chlorides and fluorides from paint, varnish,

stains, adhesives, cleaning compounds, and cement

creates a corrosive condition which may cause rapid

deterioration of the cabinet and internal components.

These instructions do not cover all variations in systems or

provide for every possible contingency. Should further

information be desired or particular problems arise which

are not covered sufficiently by this manual, contact your

local distributor or the manufacturer as listed on the air

handler nameplate.

These Air Handlers are shipped from the factory in the

upflow or horizontal right configuration and are fully

convertible to downflow or horizontal left. Refer to

Section B beginning on page 3 for additional information.

INSPECTION

Check carefully for any shipping damage. This must be

reported to and claims made against the transportation

company immediately. Check to be sure all major

components are in the unit. Any missing parts should

be reported to your supplier at once, and replaced with

authorized parts only.

CAUTION

Cardboard packing material must be removed from inside

the blower assembly before starting the unit. Failure to do

so may cause indoor blower motor failure.

INSTALLATION LIMITATIONS & RECOMMENDATIONS

The general location of the air handler is normally

selected by the architect, contractor and/or home owner for

the most effective application and satisfaction.

These air handlers are suitable for installation in a closet,

alcove or utility room with free, non-ducted, air return,

using the area space as a return air plenum. With ducted

supply air, if the minimum clearances to combustible

materials and service access are observed, the above

installations are suitable.

18-GE08D1-2

Convertible Air Handlers

1-1/2 – 5 Ton

2/4TEC3F18A1000A 2/4TEC3F42A1000A

2/4TEC3F24A1000A 2/4TEC3F48A1000A

2/4TEC3F30A1000A 2/4TEC3F55A1000A

2/4TEC3F36A1000A 2/4TEC3F60A1000A

Need help?

Do you have a question about the American Standard 2/4TEC3F18A1000A and is the answer not in the manual?

Summary

General Information

Installation Limitations and Recommendations

Details site selection, clearances, and specific installation constraints for optimal system performance and safety.

Unit Installation

Upflow Installation

Instructions for configuring the air handler for upflow airflow and positioning.

Downflow Installation

Steps for converting the air handler to a downflow configuration, including baffle changes.

Horizontal Left Installation

Procedures for setting up the unit for horizontal left airflow and necessary modifications.

Horizontal Right Installation

Details on the factory configuration for horizontal right airflow and any required adjustments.

Electrical Wiring

Power Wiring

Information on power supply voltage, wire sizing, fuse selection, and connections.

Control Wiring

Details on low-voltage wiring for thermostat, outdoor unit, and system control connections.

Checkout Procedure

Supplementary Heaters Checkout Procedures

Specific checks required for air handlers equipped with supplementary electric heaters.

Summary

General Information

Installation Limitations and Recommendations

Details site selection, clearances, and specific installation constraints for optimal system performance and safety.

Unit Installation

Upflow Installation

Instructions for configuring the air handler for upflow airflow and positioning.

Downflow Installation

Steps for converting the air handler to a downflow configuration, including baffle changes.

Horizontal Left Installation

Procedures for setting up the unit for horizontal left airflow and necessary modifications.

Horizontal Right Installation

Details on the factory configuration for horizontal right airflow and any required adjustments.

Electrical Wiring

Power Wiring

Information on power supply voltage, wire sizing, fuse selection, and connections.

Control Wiring

Details on low-voltage wiring for thermostat, outdoor unit, and system control connections.

Checkout Procedure

Supplementary Heaters Checkout Procedures

Specific checks required for air handlers equipped with supplementary electric heaters.

This document is an Installer's Guide for Convertible Air Handlers, specifically models 2/4TEC3F18A1000A, 2/4TEC3F24A1000A, 2/4TEC3F30A1000A, 2/4TEC3F36A1000A, 2/4TEC3F42A1000A, 2/4TEC3F48A1000A, 2/4TEC3F55A1000A, and 2/4TEC3F60A1000A. These units are designed for 1-1/2 to 5-ton applications.

Function Description:

These convertible air handlers are designed to circulate conditioned air as part of a central air conditioning or heat pump system. They can be configured for upflow, downflow, horizontal left, or horizontal right airflow, offering flexibility for various installation scenarios. The units are suitable for installation in closets, alcoves, utility rooms, attics, garages, or crawl spaces, with either free (non-ducted) air return or ducted supply and return air. They are approved for draw-through applications only.

Important Technical Specifications:

Capacity: 1-1/2 to 5 tons.
Voltage: Shipped wired for 230 volts, convertible to 208 volts.
Refrigerant Connections: Made outside the cabinet.
Condensate Drain: Primary drain connections are 3/4" NPT, located in front of the indoor coil. Two secondary drain connections are provided for different orientations.
Duct Connections: Convertible duct flanges are provided for 3/4" or 1-1/2" duct board applications.
Clearances to Combustible Material (Required):
- Sides: 0"
- Front: 0"
- Back: 0"
- Inlet Duct: 0"
- Outlet Duct: 0" (except 1" for the first 3 ft of outlet duct when electric heaters are installed, with specific exceptions for BAYHTR1405, 1408, and 1410 models in upflow configuration).
Service Clearances (Recommended):
- Sides: 2"
- Front: 21"
- Back: 0"
- Inlet Duct: 1"
- Outlet Duct: 1"
Refrigerant Types: R-22 (2TEC models) and R-410 (4TEC models).
Refrigerant Line Braze Sizes (Gas Line / Liquid Line):
- TEC3F18A, TEC3F24A, TEC3F30A, TEC3F36A: 5/8" / 1/4" (R-22); 5/8" / 5/16" (R-410)
- TEC3F42A: 3/4" / 5/16" (R-22); 3/4" / 3/8" (R-410)
- TEC3F48A, TEC3F60A: 7/8" / 3/8" (R-22); 7/8" / 3/8" (R-410)
- TEC3F55A: 1-1/8" / 3/8" (R-22); 7/8" / 3/8" (R-410)
Flow Control: TXV/NB (Thermostatic Expansion Valve/No Bleed).
Subbase Dimensions (A x B):
- TAYBASE100: 23-3/4" x 14-13/16"
- TAYBASE101: 21-3/4" x 14-13/16"
- TAYBASE102: 26-3/4" x 14-13/16"
Cabinet Dimensions (A x B x H x W):
- 2/4TEC3F18A, 2/4TEC3F24A: 17.00" x 39.00" x 43.00" x 21.50"
- 2/4TEC3F30A, 2/4TEC3F36A: 19.00" x 41.00" x 45.00" x 21.50"
- 2/4TEC3F42A: 23.80" x 47.75" x 51.75" x 23.50"
- 2/4TEC3F48A, 2/4TEC3F60A: 31.20" x 58.75" x 57.90" x 23.50"
- 2/4TEC3F55A: 29.00" x 53.90" x 57.90" x 26.00"
- Note: 2/4TEC3F48A & 60A models are two-piece cabinets.

Usage Features:

Convertibility: Easily converts between upflow, downflow, horizontal left, and horizontal right configurations.
Heater Compatibility: Designed to integrate with field-installed electric heaters from American Standard Inc. only. A sheet metal plate (BAY99X123) is required to cover the open hole in the airflow system if no supplementary electric heater is used.
Downflow Installation: Requires an accessory subbase (TAYBASE100, TAYBASE101, or TAYBASE102) for installation on combustible flooring. A downflow baffle kit is included and required for downflow applications.
Horizontal Installation: For horizontal left, the coil must be rotated 180 degrees. For horizontal right, the unit is shipped in this configuration. Remote filter grilles are recommended for horizontal applications for maximum efficiency and filter maintenance.
Suspension: Cage nuts are provided for horizontal right suspension (six 1/4"-20 threaded rods for 2TEC3F18-42A models, eight for 2TEC3F48-60A models). Horizontal left suspension requires support from the bottom near both ends and the middle to prevent sagging.
Condensate Management: Features primary and secondary drain connections. An auxiliary drain pan is recommended for horizontal installations to prevent ceiling damage. Drain lines must be trapped with a minimum 2" water seal and sloped downward.
Electrical Connections: Low voltage wiring (No. 18 A.W.G. minimum conductors) connects indoor unit, outdoor unit, and thermostat. Plug-in type electrical connectors are provided for supplementary heaters.
Mobile Home Use: Suitable for mobile home use, evaluated in accordance with the Code of Federal Regulations, Chapter XX, Part 3280 or equivalent.

Maintenance Features:

Filter Access: Designed for easy access to the filter.
Drain Line Clean-out: A clean-out tee or cross is recommended in the primary drain line for future maintenance.
Blower Assembly: Cardboard packing material must be removed from inside the blower assembly before starting the unit to prevent motor failure.
Lubrication: Direct drive motors have permanently lubricated bearings; normal use lubrication is not recommended.
Service Access: Installation should allow unobstructed service access, especially for suspended units.
Refrigerant Piping: Routing must maintain service access to the blower compartment and allow easy removal of the filter access panel and filter.
TXV Bulb Protection: The TXV bulb must be protected (wrapped with a wet rag) or removed while brazing to prevent overheating, which can affect performance. A brazing shield is provided.