508 01 1603 01 7-19
Installation, Start-Up, and Service Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . 1
PRE-INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . 2
Moving and Storage. . . . . . . . . . . . . . . . . . . . . . . . 2
Rigging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . 2
Unit Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Unit Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Refrigerant Piping Access . . . . . . . . . . . . . . . . . . 15
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . 15
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . 21
Fan Motors and Drives . . . . . . . . . . . . . . . . . . . . 21
Power Supply and Wiring . . . . . . . . . . . . . . . . . . 21
Connecting Ductwork. . . . . . . . . . . . . . . . . . . . . . 27
• DISCHARGE CONNECTIONS
• RETURN CONNECTIONS
• OUTDOOR-AIR INLET CONNECTIONS
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . 27
START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Adjusting TXV for Superheat . . . . . . . . . . . . . . . . 28
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fan Motor Lubrication . . . . . . . . . . . . . . . . . . . . . 29
Fan Shaft Bearings . . . . . . . . . . . . . . . . . . . . . . . 29
Centering Fan Wheel. . . . . . . . . . . . . . . . . . . . . . 29
Fan Shaft Position Adjustment . . . . . . . . . . . . . . 29
Individual Fan Wheel Adjustment . . . . . . . . . . . . 30
Fan Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Fan Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Fan Pulley Alignment. . . . . . . . . . . . . . . . . . . . . . 30
Pulley and Drive Adjustment . . . . . . . . . . . . . . . . 31
Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . 31
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . 31
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Cleaning Cooling Coil . . . . . . . . . . . . . . . . . . . . . 31
Cleaning Insulation . . . . . . . . . . . . . . . . . . . . . . . 31
Replacing Filters . . . . . . . . . . . . . . . . . . . . . . . . . 31
START-UP CHECKLIST . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical
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.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause 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 inju-
ry, death and/or equipment damage.
R-410A refrigerant systems operate at higher pres-
sures than standard R-22 systems. Do not use R-22
service equipment or components on R-410A refriger-
ant equipment.
WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal injury
or death.
Relieve pressure and recover all refrigerant before sys-
tem repair or final unit disposal.
Wear safety glasses and gloves when handling refriger-
ants. Keep torches and other ignition sources away from
refrigerants and oils.
INSTALLATION INSTRUCTIONS
FAS/FHS Series, Package Air Handling Units
6 to 30 Ton Air Conditioners
6 to 20 Ton Heat Pump
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