Carrier FAS072 Installation, Start-Up And Service Instructions Manual

CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . 2
Moving and Storage . . . . . . . . . . . . . . . . . . . . . . 2
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . 12
Unit Positioning . . . . . . . . . . . . . . . . . . . . . . . . 12
Unit Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . 13
Refrigerant Piping Access . . . . . . . . . . . . . . . . 13
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . 17
Fan Motors and Drives . . . . . . . . . . . . . . . . . . . 17
Power Supply and Wiring . . . . . . . . . . . . . . . . 17
Connecting Ductwork . . . . . . . . . . . . . . . . . . . . 22
• DISCHARGE CONNECTIONS
• RETURN CONNECTIONS
• OUTDOOR-AIR INLET CONNECTIONS
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . 22
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Adjusting TXV for Superheat . . . . . . . . . . . . . . 24
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Fan Motor Lubrication . . . . . . . . . . . . . . . . . . . 24
Fan Shaft Bearings . . . . . . . . . . . . . . . . . . . . . . 24
Centering Fan Wheel . . . . . . . . . . . . . . . . . . . . 25
Fan Shaft Position Adjustment . . . . . . . . . . . . 25
Individual Fan Wheel Adjustment . . . . . . . . . . 25
Fan Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Fan Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Fan Pulley Alignment . . . . . . . . . . . . . . . . . . . . 26
Pulley and Drive Adjustment . . . . . . . . . . . . . . 26
Condensate Drains . . . . . . . . . . . . . . . . . . . . . . 26
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . 26
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cleaning Cooling Coil . . . . . . . . . . . . . . . . . . . 26
Cleaning Insulation . . . . . . . . . . . . . . . . . . . . . . 26
Replacing Filters . . . . . . . . . . . . . . . . . . . . . . . . 37
START-UP CHECKLIST . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical
FAS/FHS 072-180
Packaged Air-Handling Units
with R-410A Refrigerant
Installation, Start-up and
Service Instructions
Page
FAS-FHS-072-180-01SI Rev. A
components. Only trained and qualified service personnel
should install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance
functions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service
personnel. When working on air-conditioning equipment,
observe precautions in the literature, tags and labels
attached to the unit, and other safety precautions that may
apply.
Follow all safety codes, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguisher available for all brazing operations.
It is important to recognize safety information. This is the
safety-alert symbol . When you see this symbol on the
unit and in instructions or manuals, be alert to the potential
for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety-alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or death.
WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe
practices, which may result in minor personal injury or
product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation,
reliability, or operation.
DANGER
ELECTRICAL SHOCK HAZARD
Failure to follow this warning will result in personal injury
or death.
Before performing service or maintenance operations
on unit, turn off main power switch to unit and install
lock(s) and lockout tag(s). Ensure electrical service to
rooftop unit agrees with voltage and amperage listed on
the unit rating plate. Unit may have more than one
power switch.
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
R-410A refrigerant systems operate at higher pressures
than standard R-22 systems. Do not use R-22 service
equipment or components on R-410A refrigerant
equipment.
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