JOHNSON CONTROLS
33
FORM 130.13-NOM8 (1021)
MAINTENANCE
Factory Provided Damper Actuator
Equipment may be supplied with a field
or factory mounted damper actuator.
If actuator is field or factory-provided,
refer to the actuator IOM for specific
instructions. See Table 1 for maximum
wire lengths for control voltage.
Damper Shaft
There is an indicator on the end of the damper shaft that
can be used to determine the position on the damper
blade. If the indicator is horizontal, the damper is
completely open.
TABLE 1 - MAXIMUM WIRE LENGTHS
WIRE SIZE
MAX FEET
16 GA
1225 FT
18 GA
725 FT
20 GA
400 FT
22 GA
200FT
Motor/Blower Removal And Replacement
Step 1:
Disconnect all electrical power to the
equipment, lock out and tag out power source. Locate
top and/or bottom panel quarter-turn latches, turn
counter-clockwise to disengage.
ELECTRICAL SHOCK HAZARDS
All power must be disconnected pri
-
or to installation and servicing this
equipment. More than one source
of power may be present. Discon
-
nect, lock out and tag out all power
sources to avoid electrocution or
shock hazards.
Motor/Blower Assembly
Fan-powered terminal unit motors are equipped with
permanently lubricated bearings and require little or
no maintenance. The frequency of required cleaning
is dependent on the operating hours of the system,
filter maintenance and efficiency, as well as dirt load.
Periodically inspect the motor and blower housing wheel
for accumulation of dust, and clean as necessary.
Motor/Blower Cleaning
1. Disconnect all electrical power to the equipment,
lock out and tag out power source.
2. Gain access to motor housing through top or bot
-
tom access panels, using a slotted screwdriver or
similar tool to turn latches.
3. Use soft brush and vacuum to remove loose debris
from motor housing.
4. Replace access panel(s) and restore electrical
power to equipment.
5. Use caution to assure that any contaminated mate
-
rial does not contact other areas of the equipment
or building.
Properly dispose of all contaminat-
ed materials.
Damper shaft indicator in horizontal position, indicat-
ing fully open damper blade
