Ecos
aire
®
CM Series Precision Air Conditioner Owners Manual
86
Ecos
aire
®
July 2007
Data subject to change without notice.
Operation Maintenance Blower
Belts should not be frayed, glazed, or excessively worn. Follow standard belt inspection procedures recom-
mended by the belt manufacturer.
To check belt tension, first disconnect electric power from the unit and follow all recommended safety precau-
tions. Obtain a V-Belt tension gauge and use it according to the instructions provided with it. Most major belt
manufacturers provide or recommend a suitable gauge for their belts.
In an emergency, the guidelines below may help until a belt tension gauge is obtained.
Measure the distance in inches between
the shaft centers. Multiply the number of
inches by 1/64. This will be the deflection
(D) in the diagram at right.
ex: For S=32 inches,
D= 32in x 1/64 = 1/2 in.
Measure the diameter of the smaller
sheave.
Read the V-belt cross-section size from
the belt label.
Adjust the belt tension to cause the
force needed to produce the deflection D
to be near that shown in the table on the
next page.
ex: For the above example of 32 inches
between shaft centers, assume that
the belt is a new B60 and that the
smaller sheave is 7 inches in
diameter. From the table on the
next page, a new B60 belt with a 7-
inch small sheave should require
6.3 pounds of force to produce the
1/2 inch deflection.
Adjust the belt tension until the
measured force necessary to produce the
1/2 inch deflection is about 6.3 pounds.
D
S
Belt(s)
OPERA
TION
SAMPLE
Number
, location, and
appearnce of component
s
may vary
.