AAON Coil Products
CA SERIES
CONDENSING UNITS
MANUFACTURED
IN THE U.S.A
INSTALLATION AND OPERATION MANUAL
▲! WARNING
Scroll compressors will be damaged by operation with the wrong rotation.
THE LOW PRESSURE SWITCH HAS BEEN
DISCONNECTED AFTER TESTING
AT THE FACTORY.
The wiring must be reconnected and proper rotation determined at the time of start-up by a qualified service technician using suction and discharge pressures gauges.
Any alteration should only be made at the unit power connection.
1
AAON Coil Products |
TABLE OF CONTENTS |
SECTION |
PAGE NUMBER |
INSTALLATION …………………………………………………………………………… 3
General
Location
Service Clearance
Setting the Unit
Electrical
Thermostat
REFRIGERANT PIPING
General …………………………………………………………………………4
Interconnecting Piping
CHECKOUT PROCEDURE …………………………………………………………… 6
Cooling
Compressor Checkout Procedure ……………………………………… 7
SERVICE, TROUBLE SHOOTING & MAINTENANCE ………………………………… 8
General Instructions
Coil Information
▲! CAUTION
Installation and service must be performed by a qualified installer or service agency.
▲! IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFC's and HCFC's) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incarceration may be levied for non-compliance.
Owner should pay particular attention to the words: NOTE, CAUTION AND WARNING. NOTES are intended to clarify or make the installation easier. CAUTIONS are given to prevent
equipment damage. WARNINGS are given to alert owner that personal injury and/or equipment damage may result if installation procedure is not handled properly.
It is the intent of AAON Coil Products, Inc. to provide accurate and current specification information.
However, in the interest of product improvement, AAON Coil Products, Inc. reserves the right to change pricing, specifications and/or design of it's products without notice, obligation or liability.
P84510-A (ACP 27230)
© 1999 AAON Coil Products, Inc., all rights reserved throughout the world.
2
INSTALLATION
AAON Coil Products 'CA' Series units are designed for fast easy installation
GENERAL
All CA condensing units have lifting areas at the underside of the equipment to allow moving and placement without physical damage. Arrange spreader bars, blocking or other lifting devices to prevent any damage to the coils or cabinet of the condensing unit. These condensing units may be placed on a roof or at ground level since they are designed for exposure to weather.
When roof mounted, a steel frame must be provided that will support the unit above the roof itself.
When installed at ground level, a substantial base must be provided that will not settle.
LOCATION
Airflow to and from the condensing unit must not be restricted. Obstruction to air flow will result in decreased performance and efficiency. The installation position must provide at least 3 feet of side clearance for proper air flow into the coils. When units are mounted adjacent to each other the clearance required between them would be 6 feet.
Condensing units should not be installed in an enclosure or pit that is deeper than the height of the unit. When a recessed installation is used the side clearance requirement is doubled to 6 feet for the inlet air.
The CA 02 through CA 05 model sizes have a horizontal airflow pattern. The discharge air side of one unit should not be aligned with the intake of another. The discharge air should be faced away from the adjacent building or structure.
The CA 08 through CA 25 models have a vertical air discharge. There must be no obstruction above the equipment that may deflect this air back to the inlet of the condensing unit. Do not place the unit under an overhang.
Condensing unit operation can also be affected by wind. It is good practice to position the unit so its length is parallel with the prevailing wind.
SERVICE CLEARANCE
One end of the CA condensing unit contains the access door that must be accessible for periodic service. This area contains the compressor, controls, safety devices, refrigerant service and shut-off valves.
▲! IMPORTANT
Three phase Scroll Compressors are directional and start-up must be performed by a qualified service technician using suction and discharge gauges.
It is recommended that a minimum of 4 feet be left free at this end of the unit for proper and easier servicing.
SETTING THE UNIT
If cables or chains are used to hoist the unit, care should be taken to prevent damage to the cabinet.
Hoist unit to a point directly above the pad, and lower unit into the proper place. Unit may also be positioned with a forktruck. Remove the harness used in hoisting. Make sure the unit is properly seated and level.
ELECTRICAL
Check the unit data plate to make sure it agrees with the power supply. Connect power to the unit according to the wiring diagram provided with the unit.
The power and control wiring may be brought in through the holes provided at one corner of the unit. Protect the branch circuit in accordance with code requirements. If the control wires are to run inside the same conduit, use 600 volt wire or as required by applicable codes. The unit must be electrically grounded in accordance with the National Electric Code, ANSI / NFPA No. 70-1984 when installed if an external source is utilized, in Canada use current C.S.A. Standard C22.1 Canadian Electric Code Part 1.
Power wiring is to the unit terminal block or compressor contactor. All wiring beyond this point has been done by the manufacturer.
Connect the control wiring and apply power to the unit. CHECKCOMPRESSORFORPROPERROTATIONBYSTARTING UNIT ONLY AFTER CONNECTING PRESSURE GAUGES TO SUCTION AND DISCHARGE.
THE COMPRESSOR WILL BE DESTROYED IF RUN IN THE WRONG DIRECTION.
NOTE: All units are factory wired for 230, 380, 415, 460 or 575 volt.
THERMOSTAT
Low voltage room thermostat should be located on an inside wall 4 to 5 feet above the floor where it will not be subjected to drafts, sun exposure or heat from electrical fixtures or appliances. Follow manufacturer's instructions enclosed with thermostat for general installation procedure.
▲! WARNING
Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit to OFF at disconnect switch(es). Unit may have multiple power supplies.
3
Loading...