Installation, Operation and Maintenance Manual
VariCool EZ-Fit
25
Subject to change without notice.
Maintenance Procedures
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 hinged filter access door (either side) Slide the filters
out Replace the filters and slide back into position Reinstall
the screws on the filter access door
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
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 may
result in personal injury, equipment or
property damage
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 depends on operating conditions
Lubrication should be checked every 1-2 months when
blower is operating constantly
DWDI 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
