Carrier 39T Installation, Start-Up And Service Instructions Manual

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 OPEN AND 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.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 3 PC 201 Catalog No. 533-931
Tab 1b
Central Station Air-Handling Units
Installation, Start-Up and
Service Instructions
Printed in U.S.A.
CONTENTS
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
Form 39T-3SI Pg 1
39T
Page
3-99 Replaces: 39T-2SI