Installation manual

IM-487 Page 87
Table 20: Airfoil Wheel-to-Funnel Tolerances
Figure 86. 44" & 49" Airfoil Wheel-to-Funnel Alignment
Table 21: 44" & 49 Airfoil Wheel-to-Funnel Tolerances
Winterizing Water Coils
Coil freeze-up can be caused by such things as air stratifica-
tion and failure of outdoor dampers and/or preheat coils.
Routine draining of water cooling coils for winter shutdown
cannot be depended upon as insurance against freeze-up.
Severe coil damage may result. It is recommended that all
coils be drained as thoroughly as possible and then treated in
the following manner.
Fill each coil independently with an antifreeze solution using
a small circulating pump and again thoroughly drain.
Check freezing point of antifreeze before proceeding to next
coil. Due to a small amount of water always remaining in
each coil, there will be a diluting effect. The small amount of
antifreeze solution remaining in the coil must always be con-
centrated enough to prevent freeze-up.
Note: Carefully read instructions for mixing antifreeze
solution used. Some products will have a higher
freezing point in their natural state than when mixed
with water.
Standard Limited Product Warranty
Consult your local McQuay Representative for warranty
details. Refer to Form 933-43285Y. To find your local
McQuay Representative, go to www.mcquay.com.
Service and Warranty Procedure
Replacement Parts
When writing to McQuay for service or replacement parts,
provide the model number, serial number, and unit part num-
ber of the unit as stamped on the serial plate attached to the
unit. For questions regarding wiring diagrams, it will be nec-
essary to provide the number on the specific diagram. If
replacement parts are required, include the date of unit instal-
lation, the date of failure, an explanation of the malfunction,
and a description of the replacement parts required.
In-Warranty Return Material Procedure
Material other than compressors may not be returned except
by permission of authorized factory service personnel of
McQuay International at Minneapolis, Minnesota.
A "return goods" tag will be sent to be included with the
returned material. Enter the information as called for on the
tag in order to expedite handling at out factories and issuance
of credits. All parts shall be returned to the factory desig-
nated on the return goods tag, transportation charges prepaid.
The return of the part does not constitute an order for replace-
ment. A purchase order for the replacement part must be
entered through your nearest McQuay representative. The
order should include the component's part number and descrip-
tion and the model and serial numbers of the unit involved.
If it is determined that the failure of the returned part is due to
faulty material or workmanship within the standard warranty
period, credit will be issued on the customer's purchase order.
Wheel-to-Funnel Relationship (In Inches)
Wheel Diameter Inches) “A” +0.3/ —0.0
27 .31" (8mm)
30 .31" (8mm)
33 .31" (8mm)
36 .44 (11mm)
40 .62" (16mm)
WHEEL-TO-FUNNEL RELATIONSHIP
WHEEL DIA. (IN.) “A” (IN INCHES)
40
16.21 (412 mm)
49 17.81 (452 mm)