Carrier CRECOMZR052A00, Installation Instructions Manual

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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480314-01 Printed in U.S.A. Form IIK-CRECOMZR52-02 Pg 1 8-21 Replaces: IIK-CRECOMZR52-01
Installation Instructions
Part No. CRECOMZR052A00 and CRECOMZR053A00
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
PACKAGE USAGE AND CONTENTS . . . . . . . . . . . . . 2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ACCESSORIES LIST . . . . . . . . . . . . . . . . . . . . . . . . . . 4
VERTICAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . 4
HORIZONTAL INSTALLATION . . . . . . . . . . . . . . . . . . 8
Barometric Hood Assembly . . . . . . . . . . . . . . . . . . . 12
• BAROMETRIC HOOD (VERTICAL CONFIGURATION)
• BAROMETRIC HOOD (HORIZONTAL
CONFIGURATION)
CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
EconoMi$er IV Standard Sensors . . . . . . . . . . . . . . 16
• OUTDOOR AIR TEMPERATURE (OAT) SENSOR
• SUPPLY AIR TEMPERATURE (SAT) SENSOR
• LOW TEMPERATURE COMPRESSOR LOCKOUT
SWITCH
• ECONOMI$ER IV CONTROL MODES
• OUTDOOR DRY BULB CHANGEOVER
• OUTDOOR ENTHALPY CHANGEOVER
• DIFFERENTIAL ENTHALPY CONTROL
• INDOOR AIR QUALITY (IAQ) SENSOR INPUT
• EXHAUST SET POINT ADJUSTMENT
• MINIMUM POSITION CONTROL
• DAMPER MOVEMENT
• THERMOSTATS
• OCCUPANCY CONTROL
• DEMAND CONTROLLED VENTILATION
• CO2 SENSOR CONFIGURATION
• DEHUMIDIFICATION OF FRESH AIR WITH DCV
CONTROL
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . 22
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 22
EconoMi$er IV System Preparation . . . . . . . . . . . . . 22
Differential Enthalpy . . . . . . . . . . . . . . . . . . . . . . . . . 22
Single Enthalpy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DCV (Demand Controlled Ventilation) and Power
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DCV Minimum and Maximum Position . . . . . . . . . . 23
Supply-Air Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
EconoMi$er IV Troubleshooting Completion . . . . . 23
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.
IMPORTANT: Read these instructions completely before
attempting to install the EconoMi$er
®
IV accessory.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
and/or death.
Before beginning any modification, be certain that the main-
line electrical disconnect switch is in the OFF position. Close
the main gas supply shutoff valve. Tag disconnect switch and
gas valve with suitable warning labels.
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or
death.
Disconnect power supply and install lockout tag before at -
tempting to install accessory.
Vertical and Horizontal Low Leak EconoMi$er
®
IV Accessory
for Medium Rooftop Units
15 to 27.5 Tons