Carrier 39T - User Manual

Installation, Start-Up and
Service Instructions
SAFETY CONSIDERATIONS
Air-handling equipment is designed to provide safe and re-
liable service when operated within design specifications. To
avoid injury to personnel and damage to equipment or property
when operating this equipment, use good judgment and follow
safe practices as outlined below.
NEVER enter an enclosed fan cabinet or reach into a unit while
the fan is running.
LOCK OPENAND TAG the fan motor power disconnect switch
before working on a fan. Take fuses with you and note removal
on tag.
LOCK OPEN AND TAG the electric heat coil power discon-
nect switch before working on or near heaters.
CHECK the assembly and component weights to be sure that
the rigging equipment can handle them safely. Note, also, the
centers of gravity and any specific rigging instructions.
CHECK for adequate ventilation so that fumes will not migrate
through ductwork to occupied spaces when welding or cutting
inside air-handling unit cabinet or plenum.
WHEN STEAM CLEANING COILS be sure that the area is
clear of personnel.
DO NOT remove access panel fasteners until fan is completely
stopped. Pressure developed by a moving fan can cause exces-
sive force against the panel and toward personnel.
DO NOT work on dampers until their operators are
disconnected.
BE SURE that fans are properly grounded before working
on them.
SECURE fan drive sheave with a rope or strap before working
on a fan to ensure that rotor cannot freewheel.
DO NOT restore power to unit until all temporary walkways
inside components have been removed.
NEVER pressurize equipment in excess of specified test
pressures.
PROTECT adjacent flammable material when welding or flame
cutting. Have a fire extinguisher at hand and ready for imme-
diate use.
PREVENT unauthorized entry into the unit; leave safety latches
in place on access doors except during installation or service
procedures. After accessing a section, replace and tighten the
safety latch.
FIELD SUPPLIED MOTORS should be Underwriters’ Labo-
ratories (UL) or Canadian Standards Association (CSA)
approved.
FIELD WIRING must comply with National Electrical Code
(NEC) and all local requirements.
CONTENTS
Page
SAFETY CONSIDERATIONS ...................1
INTRODUCTION ..............................2
UNIT AND COMPONENT IDENTIFICATION . . . 2-15
PHYSICAL DATA ..........................16-21
PRE-INSTALLATION .......................22-33
Inspection ..................................22
Rigging and Handling .......................22
Long-Term Storage ..........................22
Service Clearance ...........................28
Drain Positioning ...........................28
Unit Suspension ............................31
Internal Vibration Isolation ...................31
External Vibration Isolation ..................32
INSTALLATION ...........................34-72
Bolting Patterns and Duct Attachment ........34
Connection Flanges .........................34
Vertical Draw-Thru Units .....................35
Field-Assembled Blow-Thru Units ............36
Mixing Box .................................37
Face and Bypass Dampers ..................37
Fan Motors and Drives ......................37
Sheaves ....................................38
V-Belts .....................................39
Inlet Guide Vane Actuators, Forward-Curved
Fans .....................................40
Inlet Guide Vane Actuators, Airfoil Fans ......41
Inlet Guide Vane Actuators Plenum Fans .....42
Plenum Fan Duct Connections ...............42
Face and Bypass Damper Linkage ...........44
Mixing Box Damper Actuators ...............45
Mixing Box/Filter Mixing Box Damper
Linkage ..................................45
Water and Steam Coil Piping
Recommendations ........................48
Coil Freeze-Up Protection ...................50
Refrigerant Piping, Direct-Expansion Coils ...50
Condensate Drain ...........................65
Electric Heaters .............................66
START-UP ................................72-74
Checklist ...................................72
SERVICE .................................74-101
General .....................................74
Electric Heaters .............................74
Fan Motor Replacement .....................74
Cleaning Double-Wall Interiors ...............74
Coil Cleaning ...............................74
Winter Shutdown ...........................75
Coil Removal ...............................76
Changing Coil Hand .........................79
Filters ......................................79
39T
Central Station Air-Handling Units
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 3
Tab 1b
PC 201 Catalog No. 533-931 Printed in U.S.A. Form 39T-3SI Pg 1 3-99 Replaces: 39T-2SI

Carrier 39T Specifications

General

Brand	Carrier
Model	39T
Category	Air Handlers
Language	English

Summary

SAFETY CONSIDERATIONS

General Safety Guidelines

General safety guidelines for operating air-handling equipment safely and avoiding injury.

INTRODUCTION

39 T Series Air Handler Overview

Overview of the 39T series central station air handlers and their capacities.

UNIT AND COMPONENT IDENTIFICATION

Unit Nomenclature

Explanation of the 18-digit model number used for all 39T units.

Component Description

Table listing and describing various 39T unit and return fan components.

PHYSICAL DATA

Coil Capacity and Size Data

Data describing physical properties of 39T coils, including capacity and dimensions.

PRE-INSTALLATION

Unit Inspection and Handling

Inspect the unit for damage, check packing list, and notify Carrier of discrepancies.

Long-Term Storage Precautions

Precautions for storing the unit before installation to prevent damage and corrosion.

Service Clearance Requirements

Ensuring adequate space for unit placement and service access operations.

INSTALLATION

Bolting Patterns and Duct Attachment

Shows bolting patterns for unit and accessory flange connections.

Connection Flanges Assembly

Procedure for assembling connection flanges to separate unit sections.

Field Assembled Blow-Thru Unit Installation

Instructions for installing blow-thru units, including heating coil and zone damper sections.

Mixing Box, Fan Motor, and Drive Installation

Installing mixing boxes, fan motors, drives, and preventing junction box condensation.

Sheave, Belt, and Shaft Alignment

Checking shaft and sheave alignment for proper belt and sheave performance.

V-Belt Installation and Tensioning

Instructions for installing, adjusting, and tensioning V-belts for optimal performance.

Inlet Guide Vane Actuator Installation

Field adjustment of inlet guide vanes for various fan types and actuator installations.

Damper Linkage and Actuator Installation

Installing face, bypass, mixing box, and zone damper actuators and linkages.

Coil Piping and Freeze-Up Protection

Guidelines for piping water, steam, and DX coils and preventing freeze-up.

Thermostatic Expansion Valve and Hot Gas Bypass Piping

Field-supplied TXVs, distributor nozzle installation, and hot gas bypass piping.

Condensate Drain Installation

Instructions for installing condensate-trapping drain lines for unit operation.

Electric Heater Installation and Wiring

Instructions for installing electric heaters in the EHS1 section and connecting wiring.

START-UP

Start-Up Checklist and Fan Checks

Checklist for preparing unit components and systems before initial startup.

Plenum Fan Start-Up Procedures

Start-up procedures for plenum fans similar to airfoil/forward-curved fans.

SERVICE AND MAINTENANCE

General Service Precautions

General safety precautions and important considerations for performing service procedures.

Fan Motor and Coil Service

Procedures for fan motor replacement, coil cleaning, and coil removal.

Coil Hand Change and Filter Service

Changing coil hand and inspecting/replacing filters for optimal performance.

Fan Shaft Bearing and Removal Procedures

Detailed steps for removing fan shaft bearings and the fan wheel and shaft.

Discharge Modification and Lubrication

Modifying fan discharge positions and lubrication instructions for motors and bearings.

Motor and Drive Package Data

Motor data for forward-curved, airfoil, and plenum fans.