Installation, Operation and Maintenance Manual
VariCool EZ-Fit
21
Subject to change without notice.
40.20-IM (0118)
Maintenance Procedures
ELECTRICAL HAZARD
Turn OFF power and lockout service
before conducting any maintenance� Keep
hands, clothing and tools clear of electrical
terminals�
WARNING
Make sure to keep hands and clothing
clear of any moving belts, blowers and
motors while performing any maintenance�
Failure to do so could result in death or
serious bodily injury�
CAUTION
Any maintenance should be conducted
by qualified HVAC service personnel only.
Potentially hazardous situations which
may result in personal injury, equipment or
property damage�
To keep the unit operating safely and efficiently, it is
recommended that a qualified service technician check the
entire system at least once a year� Check the system more
frequently depending on use and surrounding conditions�
Filters
To keep the system operating as efficiently as possible,
change the air filters as required. Be sure to inspect them
at least one time per month when the system is in constant
operation� The unit is equipped with pleated throwaway air
filters. Make sure to replace them with the same type and
size�
NOTE: Do not attempt to clean throwaway air filters.
On units that have return air ductwork, remove the screws
to the filter access cover (either side). Use the “filter pull tab”
outward to slide the filters out. Replace the filters and slide
the “filter pull tab” back into position. Reinstall the screws on
the filter access panel.
On units that do not have return air ductwork, the filters can
simply be lifted up to clear the lower frame edge and pulled
towards you for removal�
The filters are directionally specific for air flow, reinsert the
new filter in the correct air flow direction.
Blowers
Check that the blower wheel is tight on the shaft and does
not contact the blower housing (DWDI type)�
Check for restrictions or foreign material in the air circuit�
Lubrication
Belt Driven (DWDI)
The evaporator blowers have Pillow Block bearings which
must be lubricated� Lubricate the bearings using high quality
lithium grease. Each Pillow Block Bearing has a Zerk fitting
to connect the grease gun to, for adding the grease� It is
preferable to add grease to the blower bearings while
rotating the shaft to ensure that grease forces the air pockets
from the bearing, allowing a grease seal throughout the
entire volume of the bearing� Grease should be added until
it slightly exudes through the bearing seals� When enough
grease is added, beads will form at the seals� Once these
beads are slightly visible, it indicates the bearing is full of
grease� Do not continue adding grease once these beads
are visible�
CAUTION
Over lubricating will cause the bearing to
overheat and could cause the grease seal
to blow out�
Both excessive or inadequate grease may cause premature
failure� Provided there is some grease in the bearings for
lubrication, under lubrication is better than over lubrication
as grease can easily be added but not removed� Always
allow a slight bead around the circumference of the seals to
protect the bearing from foreign matter and helps flush out
the bearing as well�
Frequency of Lubrication
Frequency of Lubrication depends on operating conditions�
Lubrication should be checked every 1-2 months when
blower is operating constantly�
Summary of Contents for VariCool EZ-Fit 12
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