Carrier 40RU 25, Manual

Page: 1 / 40

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 40RU-07SI Printed in U.S.A. Form 40RU-7SI Rev B Pg 1 7-22 Replaces: 40RU-05SI
Installation, Start-up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Moving and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Unit Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Unit Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Refrigerant and Chilled Water Piping Access . . . . 15
Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Chilled Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . 19
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Fan Motors and Drives . . . . . . . . . . . . . . . . . . . . . . . 20
Power Supply and Wiring . . . . . . . . . . . . . . . . . . . . . 21
Connecting Ductwork . . . . . . . . . . . . . . . . . . . . . . . . 23
• DISCHARGE CONNECTIONS
• RETURN CONNECTIONS
• OUTDOOR-AIR INLET CONNECTIONS
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
40RUA and 40RUQ ONLY . . . . . . . . . . . . . . . . . . . . . 25
Adjusting TXV for Superheat (40RUA and 40RUQ
only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Fan Motor Lubrication . . . . . . . . . . . . . . . . . . . . . . . 26
Fan Shaft Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Centering Fan Wheel . . . . . . . . . . . . . . . . . . . . . . . . 26
Fan Shaft Position Adjustment . . . . . . . . . . . . . . . . 26
Individual Fan Wheel Adjustment . . . . . . . . . . . . . . 26
Fan Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Fan Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Fan Pulley Alignment . . . . . . . . . . . . . . . . . . . . . . . . 27
Pulley and Drive Adjustment . . . . . . . . . . . . . . . . . . 28
Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Chilled Water Coil Freeze Protection . . . . . . . . . . . 28
Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Cleaning Cooling Coil . . . . . . . . . . . . . . . . . . . . . . . . 28
Cleaning Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Replacing Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
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 local building codes and appropriate national electrical
codes (in USA, ANSI/NFPA 70, National Electrical Code (NEC);
in Canada, CSA C22.1) for special requirements. 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 in personal injury
or death.
Before performing service or maintenance operations on unit,
always turn off main power switch to unit and install lockout
tag. Unit may have more than one power switch.
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause in personal injury,
death and/or equipment damage.
Puron
®
(R-410A) refrigerant systems operate at higher pres -
sures than standard R-22 systems. Do not use R-22 service
equipment or components on Puron refrigerant equipment.
40RU 25-30
Packaged Air-Handling Units
with Puron
®
(R-410A) Refrigerant
60 Hz