McQuay IM 937 49
Service and Warranty Procedure
Service and Warranty Procedu re
Replacement Parts
When writing to McQuay for service or replacement parts,
provide the model number, serial number, and unit part
number of the unit as stamped on the serial plate attached to
the unit. For questions regarding wiring diagrams, provide the
number on the specific diagram. If replacement parts are
required, include the date of unit installation, the date of
failure, an explanation of the malfunction, and a description of
the replacement parts required.
Compressors
McQuay Self-Contained units use the following compressors:
• Single Copeland Scroll or Bristol reciprocating compressors,
one per refrigerant circuit
• Tandem compressors, two compressors specifically
manufactured by Copeland into a single assembly
All McQuay Self-Contained products include a first-year parts
only warranty. The warranty period extends 12 months from
startup or 18 months from date of shipment, whichever comes
first. Labor to install these parts is not included with this
warranty. Compressors are considered a part and are included
in this standard warranty. See McQuay’s published Limited
Product Warranty for exclusive details.
Scroll service replacement compressors for McQuay
Self-Contained units can be obtained from the following three
sources:
• McQuay Service Parts maintains a stock of replacement
compressors.
• Copeland Refrigeration has stocking wholesalers throughout
the U.S. who maintain a limited stock of replacement scroll
compressors. The stock of single compressors is much better
than the stock of tandems “tandem ready,” single
compressors.
• Bristol has stocking wholesalers throughout the U.S. and are
an acceptable source; however, they generally do not stock
these compressors.
All Compressors
The decision to replace the failed portion of the tandem (or one
of the two compressors on a circuit), as opposed to replacing
the entire tandem or trio, must be decided based on the
following.
1 In warranty: Warranty only covers replacement of the failed
portion of the tandem.
2 Out of warranty: The customer decides whether to replace
the entire tandem.
When replacing an “in warranty” compressor through a
Copeland or Bristol wholesaler, take the failed compressor to
the wholesaler for an over-the-counter or an advanced
replacement exchange. Credit is issued by Copeland or Bristol
on the returned motor compressor upon receipt and factory
inspection of the inoperative motor compressor. In this
transaction, be certain that the motor compressor is definitely
defective. If a motor compressor is received from the field that
tests satisfactorily, a service charge plus a transportation
charge will be charged against its original credit value.
If there was a delay in the startup of the equipment and the
first-year warranty (Copeland) has expired on the compressor
within the 18-month-from-shipment warranty, order the
replacement compressor through the McQuay Parts
Department (Minneapolis).
To order:
1 Contact the McQuay Parts Department for compressor
availability.
2 Send a completed parts order form to the McQuay Parts
Department.
3 The Parts Department processes the order and the
compressors ship via ground transportation. If next-day air
is required, indicate this on the parts order form and a
freight charge will be billed to your account. Air freight
costs are not covered under the McQuay warranty.
4 After the failed compressor is replaced, return it to McQuay
International with a Return Goods Tag attached. You will
receive the tag in the mail. It must be attached to the
compressor. The Return Goods Tag has instructions on
where to send the compressor. If the compressor is not
returned, you will be billed for the replacement compressor.
5 Consideration may be given at this time to a compressor
teardown analysis, depending on the history of failures.
On McQuay equipment that includes the extended 2nd–5th
year compressor warranty option, the replacement compressor
must be ordered through the McQuay Parts Department
(Minneapolis).
To order:
1 Contact the McQuay Parts Department for compressor
availability.
2 Send the McQuay Parts Department a completed parts
order form.
3 The Parts Department processes the order and the
compressors ship via ground transportation. If next-day air
is required, indicate this on the parts order form and a
freight charge will be billed to your account. Air freight
costs are not covered under the McQuay warranty.
4 After the failed compressor is replaced, return it to McQuay
International with a Return Goods Tag attached. You will
receive the tag in the mail. It must be attached to the
compressor. The Return Goods Tag will have instructions
on where to send the compressor. If the compressor is not
returned, you will be billed for the replacement compressor.
5 Consideration may be given at this time to a compressor
teardown analysis, depending on the history of failures.
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