Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53620021-01
Printed in U.S.A.
Form 62X-1SI
Pg 1
1018
7-18
Replaces: New
Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Step 1 — Provide Unit Support
. . . . . . . . . . . . . . . . . . . 1
• ROOF CURB
Step 2 — Rig and Place Unit
. . . . . . . . . . . . . . . . . . . . . 2
• POSITIONING
• ROOF MOUNT
• SLAB MOUNT
• INSTALLATION ONTO CURB
Step 3 — Field Fabricate Ductwork
. . . . . . . . . . . . . . 24
Step 4 — Make Unit Duct Connections
. . . . . . . . . . 24
Step 5 — Install External Trap
for Condensate Drain
. . . . . . . . . . . . . . . . . . . . . . . . . 24
Step 6 — Install Gas Piping
(Gas Heat Units Only)
. . . . . . . . . . . . . . . . . . . . . . . . . 24
Step 7 — Install Hot Water or Steam Piping
(Hot Water Units Only)
. . . . . . . . . . . . . . . . . . . . . . . . 25
Step 8 — Make Electrical Connections
. . . . . . . . . . 25
Step 9 — Open Exhaust Damper (Units with
Optional Exhaust or Energy Conservation
Wheel Only)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Step 10 — Install All Accessories
. . . . . . . . . . . . . . . 27
Step 11 — Configure Controls
. . . . . . . . . . . . . . . . . . 27
Step 12 — Test Mode and Fan Balancing
. . . . . . . . 30
MAINTENANCE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . 40
PRE-START-UP CHECKLIST
. . . . . . . . . . . . . . . . . . CL-1
START-UP CHECKLIST
. . . . . . . . . . . . . . . . . . . . . . . CL-2
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform the basic maintenance
functions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service per-
sonnel. 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. Refer to Figure 1
to locate label placement.
Follow all safety codes, including ANSI (American Nation-
al Standards Institute) Z223.1. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguishers available for all brazing operations.
INSTALLATION
Step 1 — Provide Unit Support
ROOF CURB — Assemble or install accessory roof curb in
accordance with instructions shipped with this accessory. See
submittal drawings for roof curb dimensions. Install insulation,
cant strips, roofing, and counter flashing, if required. For verti-
cal supply and return connections, ductwork can be installed to
roof curb before unit is set in place. Ductwork must be attached
to curb and not to the unit. Curb must be level. This is necessary
to permit unit drain to function properly. Unit leveling tolerance
is ±
1
/
16
in. per linear ft in any direction. Refer to Accessory
Roof Curb Installation Instructions for additional information as
required. When accessory roof curb is used, unit may be in-
stalled on class A, B, or C roof covering material. Carrier roof
curb accessories are for flat roofs or slab mounting.
IMPORTANT: This installation instruction contains
basic unit installation information including installation
of field control devices. For information on unit start-up,
service, and operation, refer to the unit Controls, Start-
Up, Operation, Service, and Troubleshooting Instructions
also enclosed in the unit literature packet.
WARNING
Before performing recommended maintenance, be sure
main power switch to unit is turned off and lockout tag is
installed. Electrical shock could cause personal injury.
CAUTION
Puron
®
refrigerant (R-410A) systems operate at higher
pressures than standard R-22 systems. Do not use R-22 ser-
vice equipment or components on Puron refrigerant equip-
ment. If service equipment is not rated for Puron
refrigerant, equipment damage or personal injury may
result.
WARNING
1. Improper installation, adjustment, alteration, service,
or maintenance can cause property damage, personal
injury, or loss of life. Refer to the User’s Information
Manual provided with this unit for more details.
2. Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
What to do if you smell gas:
1. DO NOT try to light any appliance.
2. DO NOT touch any electrical switch, or use any
phone in your building.
3. IMMEDIATELY call your gas supplier from a neigh-
bor’s phone. Follow the gas supplier’s instructions.
If you cannot reach your gas supplier, call the fire
department.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket with the roof
curb. Improperly applied gasket can also result in air leaks
and poor unit performance. Do not slide unit to position on
roof curb.
62X 03-35
Dedicated Vertical or Horizontal
Outdoor Air Unit
with Optional Energy Conservation Wheel
