Carrier 42CA Installation, Start-Up And Service Instructions Manual

Installation, Start-Up and Service
CONTENTS
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1,2
PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2, 3
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
Unpack and Inspect Units . . . . . . . . . . . . . . . . . . . . . . . . 4
Protect Units From Damage . . . . . . . . . . . . . . . . . . . . . . 4
Prepare Jobsite for Unit Installation . . . . . . . . . . . . . . 4
Identify and Prepare Units . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-49
Step 1 - Place Units in Position . . . . . . . . . . . . . . . . 33
• 42C UNITS
• 42V UNITS
• 42D UNITS
Step 2 - Make Piping Connections . . . . . . . . . . . . . 34
• VALVE PACKAGES
• DRAIN CONNECTIONS
• WATER SUPPLY/RETURN CONNECTIONS
• STEAM CONNECTIONS
• DIRECT EXPANSION (DX) REFRIGERANT PIPING
• TEST AND INSULATE
Step 3 - Make Electrical Connections . . . . . . . . . . 46
• FACTORY-INSTALLED OPTIONS
• STANDARD WIRING PACKAGES
Step 4 - Make Duct Connections . . . . . . . . . . . . . . . 47
Step 5 - Frame and Finish Unit. . . . . . . . . . . . . . . . . 47
Step 6 - Cut Out Openings for Grilles and
Thermostats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Step 7 - Make Final Preparations . . . . . . . . . . . . . . 48
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49, 50
Cooling/Heating System . . . . . . . . . . . . . . . . . . . . . . . . 49
Air System Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Water System Balancing . . . . . . . . . . . . . . . . . . . . . . . . 49
Water Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Controls Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50, 51
Excessive Condensation on Unit . . . . . . . . . . . . . . . . 50
To Clean Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Check Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Fan Motor Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Clean Fan Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Clean Electric Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Clean or Replace Air Filters . . . . . . . . . . . . . . . . . . . . . 51
Electrical Wiring and Controls . . . . . . . . . . . . . . . . . . 51
Valves and Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53420011-01
Instructions
Page
Printed in U.S.A. Form 42-6SI
Fan Coil Air Conditioners
APPENDIX A - POTENTIOMETER
ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
APPENDIX B - EVO/ECM 4-SPEED
ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
APPENDIX C - 42CE/DC RETURN
MODIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . 54, 55
START-UP CHECKLIST FOR 42C,D,V SERIES
FAN COIL AIR CONDITIONERS . . . . . . . CL-1, CL-2

SAFETY CONSIDERATIONS

Installation of this unit can be hazardous due to electrical com-
ponents and equipment location (such as a ceiling or elevated
structure). Only trained, qualified installers and service
mechanics should install and service this equipment.
When installing this unit, observe precautions in the literature,
labels attached to the equipment, and any other safety precau-
tions that apply.
• Follow all safety codes.
• Wear safety glasses and work gloves. Never wear bulky
or loose fitting clothing when working on any mechani-
cal equipment. Gloves should be worn for proper protec-
tion against heat and other possible injuries. Safety
glasses or goggles should always be worn when drilling,
cutting, or working with chemicals such as refrigerants
or lubricants.
• Use care in handling and installing this unit.
• Never pressurize any equipment beyond specified test
pressures. Always pressure test with an inert fluid or gas
such as clear water or dry nitrogen to avoid possible
damage or injury in the event of a leak or component
failure during testing. Always protect adjacent flamma-
ble material when welding or soldering. Use a suitable
heat-shield material to contain sparks or drops of solder.
Have a fire extinguisher readily available.
WARNING
ELECTRIC SHOCK HAZARD. To avoid the possibility
of electrical shock, open and tag all service switches before
installing this equipment.

INTRODUCTION

Carrier fan coil units represent a prudent investment offer-
ing trouble-free operation and long service with proper installa-
tion, operation, and regular maintenance. Your equipment is
initially protected under the manufacturer's standard warranty;
however, this warranty is provided under the condition that the
steps outlined in this manual for initial inspection, proper in-
stallation, regular periodic maintenance, and everyday opera-
tion of the equipment be followed in detail. This manual should
be fully reviewed in advance before initial installation, start-up,
Pg 1
42C,D,V Series
11-17 Replaces: 42-5SI
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