15
AIR14-501.2
MAINTENANCE
CAUTION
Do not attempt to reuse any mechanical or electrical
component which has been wet. Such component must be
replaced.
IMPORTANT
To check most of the possible remedies in the troubleshooting
guide listed in Tables 15.1 & 16.1, refer to the applicable
sections of the manual.
WARNING
When servicing or repairing this equipment, use only factory-
approved service replacement parts. A complete replacement
parts list may be obtained by contacting Modine Manufacturing
Company. Refer to the rating plate on the appliance for
complete appliance model number, serial number, and
company address. Any substitution of parts or controls not
approved by the factory will be at the owner’s risk.
MAINTENANCE
The routine care and maintenance of this unit will increase
longevity, provide for the proper operational performance, and
reduce the probability of failure.
Once the unit is operational, it will be necessary to perform
certain routine maintenance/service checks. Following is a
Maintenance Schedule with the recommended checks. If your
unit is equipped with special features, there may be additional
checks that are required. Consult Modine for assistance.
The use of torque screwdrivers on panel, cover or component
mounting screws is not recommended. Hand-start all screws.
If electric drills are used – set at the lowest possible torque.
Access
Access to the unit is gained by opening the bottom access
panels.
Maintenance Schedule
Every ONE (1) MONTHS
With the Disconnect in the “OFF” position
: check the filter(s)
and replace if necessary. Remove the filter support bracket and
slide the filter(s) out of the track. Replace with new filter(s) and
reinstall the filter support bracket (see Figure 14.1). Never run
the unit without filters.
Every SIX (6) MONTHS
(Before the heating and cooling season)
1. Check for correct fan operation, no excessive noise or
vibrations.
With the Disconnect Switch in the “OFF” position:
2. Inspect all electrical circuits including optional components
and sensors for loose connections and signs of overheating,
arcing, chafing or other physical damage. The electrical
control section should also be wiped clean of all dirt that may
affect the unit operation.
3. Check the filter(s) and replace if necessary. Remove the filter
support bracket and slide the filter(s) out of the track. Replace
with new filter(s) and reinstall the filter support bracket (see
Figure 15.1). Never run the unit without filters.
4. Check the control wiring and sensors. Check the operation
and sequencing of controls and ensure that all relevant set
points are recorded.
5. Check all warning labels to ensure they can be read and that
they have not been removed.
6. Inspect condensate hose for any possible clogs.
7. Check for general obstructions to inlet and discharge openings.
8. Oil the fan motor by adding 3 drops of SAE 20 weight non-
detergent oil to the two oil holes on the fan motor.
9. Fill the fan shaft bearing cup with oil. The fan shaft bearing
is located in the housing at the opposite end of the fan shaft
from the motor (see Figure 15.2). Additional bearing cup
in middle of unit on 1250 and 1500 CFM units accessible
through front panel.
FILTER
FILTER SUPPORT
BRACKET
FILTER/DAMPER
ACCESS PANEL
FAN SHAFT
BEARING
Figure 15.1 - Filter Location
Figure 15.2 - End Shaft Bearing Cup Location