Carrier 39LH, Installation, Start-Up And Service Instructions Manual, Page: 1 / 48

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53390016-01 Printed in U.S.A. Form 39L-7SI Pg 1 816 3-14 Replaces: 39L-6SI
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . 1,2
INTRODUCTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Unit Identification
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
PREINSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-12
Rigging
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Suspended Units
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Service Clearance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Condensate Drain
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
External Vibration Isolators
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-35
Base Rail Split
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Mixing Box
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Condensate Drain
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Variable Frequency Drive (VFD)
. . . . . . . . . . . . . . . . . . . . . . . 16
Install Fan Motor
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Install Sheaves on Motor and Fan Shafts
. . . . . . . . . . . . . 16
Install V-Belts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Water and Steam Coil Piping Recommendations
. . . . . 19
Coil Freeze-Up Protection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Refrigerant Piping, Direct Expansion (DX) Coils
. . . . . . 24
Electric Heaters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Discharge Modification
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35,36
Check List
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
SERVICE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36-46
General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Fan Motor Replacement
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Coil Cleaning
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Winter Shutdown (Chilled Water Coil Only)
. . . . . . . . . . . 36
Field-Installed Coils
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Coil Removal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Changing Coil Hand
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Filters
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Fan Shaft Bearing Removal
. . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Fan and Shaft Removal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Lubrication
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Fan Sled Disassembly
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
METRIC CONVERSION CHART
. . . . . . . . . . . . . . . . . . . . . . . 47
SAFETY CONSIDERATIONS
Air-handling equipment is designed to provide safe and
reliable 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.
DANGER
NEVER enter an enclosed fan cabinet or reach into a unit
while the fan is running.
LOCK OPEN AND TAG the fan motor power disconnect
switch before working on a fan. Take fuses with you and
note removal on tag. Electric shock can cause personal
injury or death.
LOCK OPEN AND TAG the electric heat coil power dis-
connect switch before working on or near heaters.
WARNING
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 weld-
ing or cutting inside air-handling unit cabinet or plenum.
WHEN STEAM CLEANING COILS be sure that the area
is clear of personnel.
DO NOT attempt to handle access covers and removable
panels on outdoor units when winds are strong or gusting
until you have sufficient help to control them. Make sure
panels are properly secured while repairs are being made to
a unit.
DO NOT remove access panel fasteners until fan is com-
pletely stopped. Pressure developed by a moving fan can
cause excessive force against the panel which can injure
personnel.
DO NOT work on dampers until their operators are
disconnected.
BE SURE that fans are properly grounded before working
on them.
39LA,LB,LC,LD,LF,LG,LH03-25
Indoor Air-Handling Units