TM9-4120-400-14
4-43.
HEATER ELEMENTS (HR1-HR6 3 phase units) and (HR1-HR4 single phase
units). - continued
REPLACEMENT
Replace any defective heater elements.
INSTALLATION
Position heater mounting bracket into top of unit so heaters can be mounted one at a time.
1.
2.
Start with bottom most heater to be installed.
Slip heater through the bracket hole and secure with nut (8), lock washer (9), flat washer (10), and insulating
3.
washer (11) provided with heater (12).
4.
Install remaining heaters one at a time. Slide mounting bracket down progressively as each heater is installed.
Place heater support (4) in the unit and slip ends of heaters through support holes.
5.
Install three screws (5) and lock washers (6) in heater mounting bracket (7).
6.
7.
Install screw (1), lock washer (2), and flat washer (3) in heater support (4).
8.
See tags and wiring diagram figure 4-4 and connect heater leads at terminal board TB2. Remove tags.
NOTE
FOLLOW-ON MAINTENANCE:
CONDENSER FAN, MOTOR, AND HOUSING.
This task covers:
a. Inspection
b. Testing
c. Removal
d. Replacement
e. Installation
INITIAL SETUP
Tools
Equipment Condition
Refrigeration Unit Service Tool Kit
Materials/Parts
Condenser Fan Motor
Condenser Fan Housing
Lock Washers (4)
Lock Washers (4)
Tie Down Straps
4-106