Introduction; Safety Considerations - Carrier AERO 39MN Installation, Start-Up And Service Instructions Manual

CONTENTS (cont)
• COMBUSTION AIR SUPPLY
• VENTING
• OUTDOOR INSTALLATIONS
• INDOOR INSTALLATIONS
• GAS SUPPLY, PIPING, AND CONNECTIONS
Gas-Fired Rack System Furnaces . . . . . . . . . . . 118
• INSTALLATION REQUIREMENTS
• VERIFICATION
• CONDENSATE DRAINS
• FURNACE COMPONENT IDENTIFICATION
• OPERATING AND SAFETY CONTROLS
• COMBUSTION AIR SUPPLY
• UNIT LOCATION AND CLEARANCES
• VENTING
• GAS SUPPLY, PIPING, AND CONNECTIONS
Energy Recovery Ventilation (ERV) Sections. . . 121
• RECEIVING AND INSPECTION
• RIGGING AND STACKING
• ERV WHEEL MOTOR WIRING
START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121-126
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Energy Recovery Wheel. . . . . . . . . . . . . . . . . . . . . . 125
SERVICE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126-157
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Gas-Fired Furnaces (Duct and Rack System). . . 126
• INSPECTION
• OPERATION CHECK
Fan Motor Replacement. . . . . . . . . . . . . . . . . . . . . . 126
Energy Recovery Ventilation . . . . . . . . . . . . . . . . . 127
• CLEANING
• CASSETTE REPLACEMENT
• ADJUSTING AIR SEALS
• SEGMENT INSTALLATION AND REPLACEMENT
• WHEEL DRIVE MOTOR AND PULLEY
REPLACEMENT
• SOLID BELT REPLACEMENT
• LINK BELT REPLACEMENT
• OTHER MAINTENANCE
Cleaning Unit Interior/Exterior . . . . . . . . . . . . . . . . 131
Coil Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Winter Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Changing Coil Hand . . . . . . . . . . . . . . . . . . . . . . . . . 134
• NUFIN COILS
• DIRECT EXPANSION COILS
• CHILLED WATER AND HOT WATER COILS
• STEAM INNER DISTRIBUTING TUBE COILS
• PIPING
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Magnehelic Gage Maintenance . . . . . . . . . . . . . . . 137
Fan Shaft Bearing Removal . . . . . . . . . . . . . . . . . . 138
Fan and Shaft Removal . . . . . . . . . . . . . . . . . . . . . . 155
Motor Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Motor and Drive Package Data. . . . . . . . . . . . . . . . 156
Variable Frequency Drive . . . . . . . . . . . . . . . . . . . . 156
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . 157-163
Steam Coil Performance Problems. . . . . . . . . . . . 157
Steam Failure Modes . . . . . . . . . . . . . . . . . . . . . . . . 157
VFD Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
START-UP CHECKLIST -
39MN AHU UNITS . . . . . . . . . . . . . . . . . . . . CL-1,CL-2
START-UP CHECKLIST -
39MW AHU UNITS . . . . . . . . . . . . . . . . . . . . CL-3,CL-4
START-UP CHECKLIST -
Page
39M GAS-FIRED DUCT FURNACE . . . . . . . . . . CL-5
START-UP CHECKLIST -
39M GAS-FIRED FURNACE RACK
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-6
The 39M Series central station air handlers are usually in-
stalled with ductwork; they provide air conditioning at nomi-
nal capacities of 1500 to 55,000 cfm. The 39M air handler de-
sign allows hundreds of different configuration possibilities.
Each unit is assembled to meet specific job requirements and
can be shipped in sections or as a single assembly. These in-
structions describe how to install, start up, and service 39M
air handlers.

SAFETY CONSIDERATIONS

The 39M air-handling equipment is designed to provide
safe and reliable service when installed and operated within
design specifications. To avoid injury to personnel and dam-
age 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.
Failure to heed this warning will result in severe personal
injury or death.
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
disconnect switch before working on or near heaters.
Failure to follow these safety precautions could lead to
severe personal injury or death.
CHECK for adequate ventilation when welding, cutting, or
performing any other fume producing activities inside
air-handling unit cabinet or plenum so that fumes will not
migrate through ductwork to occupied spaces.
WHEN STEAM CLEANING COILS be sure that the area
is clear of personnel.
SECURE fan drive sheave with a rope or strap before
working on a fan to ensure that rotor cannot freewheel.
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.
DO NOT work on dampers until their operators are
disconnected.
BE SURE that fans are properly grounded before working
on them.
Failure to follow these safety precautions could lead to per-
sonal injury.
2

INTRODUCTION

DANGER
WARNING
WARNING
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