Figure 71 .21. Radiator shutter assembly.

1 Shutter

2 Control

Figure 71 .21. Radiator shutter assembly.

from the panel (18). Inspect the assembly visually for

the circuit breaker should open within 10

wiring defects and faulty parts. Check the circuits, using

to 125 seconds. If it fails to meet this

the wiring diagram (fig. 71.7). Replace any units that

requirement, replace the circuit breaker.

are obviously faulty. Disassemble and test the control

(3) To install the circuit breaker, position it on

box components as follows:

the pineal and fasten in place with the two

a. Circuit Breaker.

mounting screws.

Connect the leads

according to the wiring diagram (fig.

(1) To remove the circuit breaker (12, fig.

71.7.)

71.22), disconnect the electrical leads

from the terminals. Tag leads to facilitate

Control Switch.

reassembly.

Remove two mounting

(1) To replace the control switch, disconnect

screws (15) from the panel (18) and

the electrical leads. Tag leads to facilitate

remove circuit breaker (12).

reassembly. Remove the mounting nut

(2) To test, connect the circuit breaker to a

from the threaded lever lug. Remove

test circuit which will supply 200 percent

rated current. Press in the reset button;