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

CONTENTS (CONT)
Minihelic Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
• CALIBRATION CHECK
• MAINTENANCE
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
• BAG-CARTRIDGE FILTERS
• IN-TRACK BAFFLES
• FLAT FILTERS
• ANGLE FILTERS
• HEPA FILTERS
Fan Shaft Bearing Removal . . . . . . . . . . . . . . . . . . 196
Fan and Shaft Removal . . . . . . . . . . . . . . . . . . . . . . 234
Motor Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
• INTERNALLY ISOLATED UNIT
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
• MOTORS
• BEARINGS
Motor and Drive Package Data . . . . . . . . . . . . . . . . 235
Variable Frequency Drive . . . . . . . . . . . . . . . . . . . . 235
• HEAT SINK
• MAIN FAN REPLACEMENT
• CONTROL PANEL CLEANING
• BATTERY REPLACEMENT
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . 236-243
Steam Coil Performance Problems . . . . . . . . . . . . 236
Steam Failure Modes . . . . . . . . . . . . . . . . . . . . . . . . 236
VFD Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
• FAULTS (RED LED LIT)
• ALARMS (GREEN LED FLASHING)
• CORRECTING FAULTS
• HISTORY
• CORRECTING ALARMS
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
START-UP CHECKLIST -
39MN AHU UNITS . . . . . . . . . . . . . . . . . . . .CL-1, CL-2
START-UP CHECKLIST -
39MW AHU UNITS . . . . . . . . . . . . . . . . . . . .CL-3, CL-4
START-UP CHECKLIST -
39M GAS-FIRED DUCT FURNACE . . . . . . . . . . CL-5
START-UP CHECKLIST -
39M GAS-FIRED FURNACE RACK
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-6

INTRODUCTION

The 39M Series central station air handlers are usually in-
stalled with ductwork; they provide air conditioning at nominal
capacities of 1500 to 55,000 cfm. The 39M air handler design
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 instructions
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 de-
sign 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.
Failure to heed this warning will result in severe personal
injury or death.
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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.
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.
PROTECT adjacent flammable material when welding or
flame cutting. Have a fire extinguisher at hand and ready
for immediate use.
Failure to follow these safety precautions could lead to
severe personal injury and/or equipment damage.
DO NOT remove access panel fasteners until fan is
completely stopped.
Pressure developed by a moving fan can cause excessive
force against the panel and toward personnel.
Failure to heed this warning could lead to personal injury
and/or equipment damage.
DO NOT ground equipment to fan assembly when
welding. Damage to fan bearings could result.
DO NOT restore power to unit until all temporary
walkways inside components have been removed.
NEVER pressurize equipment in excess of specified test
pressures.
Failure to follow these safety precautions could lead to
equipment damage.
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WARNING
WARNING
WARNING
WARNING
CAUTION