3
WARNING
Disconnect and secure to the “OFF” position all electrical power to the fan
prior to inspection or servicing. Failure to comply with this safety
precaution could result in serious injury or death.
Routine Maintenance
Once the fan has been put into operation, periodic maintenance should be performed on the following items:
1. Motors
Greasing of motors is intended only when fittings are provided. Many fractional horsepower motors are
lubricates for life and require no further lubrication. Motors supplied with grease fittings should be greased in
accordance with the motor manufacturer's directions given on the motor nameplate.
2. Removal of Dust and Dirt
Model ESRMD fans require periodic cleaning to maintain proper air performance and reliability. Dirt left to
accumulate on propeller blades may cause an unbalanced condition resulting in excessive vibration and
premature failure of the fan.
Dust and dirt should also be cleaned from the exterior surface of the fan motor and damper actuator(s). Dirt
accumulation on the motor/actuator(s) can block ventilation holes and prevent proper cooling. Motors and
actuators should never be sprayed directly with water, steam or solvents.
3. Filter Maintenance (Model ESRMDF)
Aluminum mesh filters should be cleaned on a regular basis for optimum fan efficiency. The frequency of
cleaning depends upon the cleanliness of the incoming air.
To remove filters in fan sizes 24-30, first remove the hood. This is accomplished by removing the two fasteners
on one side of the hood and loosening the other two fasteners in the other side of the hood. Hinge the hood over
onto the roof deck; DO NOT prop the hood up, the hood could come down accidentally causing injury. The filters
can then be pulled from the slide-out racks.
On sizes 36 to 54, access panels are provided in the ends of the hood which allow the filters to be removed
without removing the hood.
Filters should be washed with a mild detergent in warm water. After the filters are dry, an adhesive spray
available at most filter distributors may be applied to increase filter efficiency.
4. Fasteners
Fan vibration has a tendency to loosen mechanical fasteners. Periodic inspection should include checking all
fasteners for tightness. Particular attention should be paid to fasteners attaching the propeller to the motor shaft
and the motor to the motor plate.
5. Damper Plenum Linkage Adjustments
Plenum dampers should open to 45
o
from closed position. Consult factory before adjusting damper linkages.
