Carrier REFRIGERANT R-410A User's Manual
Installation, Start-Up and
Service Instructions
TABLE OF CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 1
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Moving and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rigging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–20
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Unit Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Unit Isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Refrigerant and Chilled Water Piping Access . . . . . . 11
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chilled Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fan Motors and Drives . . . . . . . . . . . . . . . . . . . . . . . . . 16
Power Supply and Wiring . . . . . . . . . . . . . . . . . . . . . . . 17
Connecting Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SERVICE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21–34
Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Fan Motor Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . 21
Fan Shaft Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Centering Fan Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fan Shaft Position Adjustment . . . . . . . . . . . . . . . . . . . 22
Individual Fan Wheel Adjustment . . . . . . . . . . . . . . . . 22
Fan Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fan Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fan Pulley Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Pulley and Drive Adjustment . . . . . . . . . . . . . . . . . . . . 23
Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Chilled Water Coil Freeze Protection . . . . . . . . . . . . 23
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Cleaning Cooling Coil . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Cleaning Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Replacing Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . CL-1, CL-2
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical shock
or other conditions which may cause personal injury or
property damage. Consult a qualified installer, service agency,
or your distributor or branch for information or assistance. The
qualified installer or agency must use factory-authorized kits or
accessories when modifying this product. Refer to the
individual instructions package
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloths for brazing operations and have a fire
extinguisher available. Read these instructions thoroughly and
follow all warnings or cautions attached to the unit. Consult
local building codes and appropriate national electrical codes
(in USA, ANSI/NFPA70, National Electrical Code (NEC); in
Canada, CSA C22.1) for special requirements.
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.
40RU
Packaged Air-Handling Units
60 Hz
with Puron® (R-410A) Refrigerant
Sizes 25, 28, 30
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