Installation, Operation & Maintenance Manual
IM-5500
13
Maintenance
(refer to safety section)
Installation and maintenance are to be performed only by
qualified personnel who are familiar with local codes and
regulations and experienced with this type of equipment.
Preventive maintenance is the best way to avoid unnecessary
expense and inconvenience. Start-up and routine maintenance
should cover the following items:
a. Tighten all set screws, bolts and wire connections.
b. Cleaning of unit, impeller and damper (if present).
All motors containing ball bearings are permanently
lubricated from the factory. No additional maintenance is
required.
1. Before performing any maintenance on the fan, be sure power is turned off and locked in the OFF position at the service entrance.
2. Ventilators should be carefully checked at least once a year. For critical or rugged applications, a routine check every two or three
months is suggested.
3. All motors supplied with Twin City Fan & Blower ventilators carry a one-year limited warranty from date of shipment. For repairs
within the warranty period, the motor must be taken to the motor manufacturer’s authorized service dealer. Contact your
representative for additional warranty details.
4. A periodic motor check should consist of spinning the motor shaft with the power off to be sure the motor turns freely and the
bearings run smoothly.
5. The rotating impeller requires particular attention since materials in the air being handled can build up on the blades to cause
destructive vibration or weaken the structure of the impeller by corroding and/or eroding the blade metal. Regular inspection and
corrective action at intervals determined by the severity of each application are essential to good service life and safety.
Sharp edges and screws are a potential injury hazard. Avoid them.
CAUTION
Hazardous moving parts. Unit may contain protected fan motor
that may start automatically and cause injury. Allow time for
reset. Disconnect power before servicing.
WARNING
Twin City Fan
