Anemostat EST - Manual (Page 26)

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Service & Replacement of Blower and/or Motor
Fan terminals have a bottom removal motor and blower. The electric power must be disconnected before servicing
the unit. After the air terminal is de-energized, the procedures listed below must be followed.
1. Remove the blower motor access door from the terminal casing, by dropping the discharge end of the access door
about 7 inches and lifting up on the inlet end.
2. Disconnect the blower motor wiring by removing the four spade connectors on the controls-side of the motor.
3. The motor and blower are removed as an assembly. Remove only the two nuts on the lower blower discharge. The
assembly is “hooked” at the top of the discharge bulkhead. Swing the lower end of the blower assembly back and
up to unhook, and drop down, out of the casing.
4. The blower and motor assembly can be bench serviced. The motor blower assembly is replaced by following the
above steps in reverse order.
Service & Replacement for Electrical & Pneumatic Parts
Fan Terminals have a control enclosure as a standard feature. The control enclosure houses the speed controller,
motor relay, pneumatic electric (PE) switches, control transformer, air flow pressure switch, terminal blocks, disconnect
switch, pneumatic or electric controller and the actuator that controls the inlet valve. A control-wiring diagram for each
air terminal is attached to the unit. Individual components in the panels are not field-repairable. If one proves
defective, it should be removed and a replacement component installed. See page 24 for replacement parts list.
General Maintenance
Before performing any maintenance, disconnect power and allow the blower motor to come to a complete stop.
Disconnect the capacitor for safety (located within the blower compartment). Dirt accumulation can cause motor
overheating. Use a vacuum to remove dirt accumulations from the motor, especially in and around the motor vent
openings.
The unit may be provided with a temporary air filter. The air filter is installed on the right, plenum-inlet side of the unit,
into filter rails. Air filters should be replaced soon after fan terminal installation and start-up. Check the air filters
regularly based on the condition of the operating environment and replace as necessary.
Periodically inspect and check for unusual noises or vibrations, high motor current, worn wiring, loose mounting bolts,
and worn or pitted relay contacts.
The standard Fan Motors have permanently lubricated sleeve type bearings and require no oiling.