Product Manual

5. Transfer Switch Service8-2018

iv. Remove AC power to the automatic transfer switch.

b. Remove the transfer switch cabinet door panel.

c. Remove the following:

i. The plastic barrier covering access to the mechanical lugs

ii. The two M10X1.25 bolts and washers securing the mechanical lugs to the circuit breaker

iii. The two 3/8-16 bolts and washers securing the busbars to the breaker

iv. The four #10-32 bolts, washers, and nuts securing the breaker to the breaker mounting

bracket

v. The circuit breaker

d. Use the hardware removed in the previous step to install the replacement circuit breaker.

i. Secure the circuit breaker to the circuit breaker mounting bracket with the four #10-32

bolts. Torque to 17 in-lb (2 Nm). Make sure that the insulating barrier is secured between

the circuit breaker and mounting bracket.

ii. Secure the busbars to the breaker with the two 3/8-16 bolts. Torque to 159 in-lb (18 Nm).

iii. Secure the mechanical lugs to the circuit breaker with two M10X1.25 bolts. Torque to 150

in-lb (17 Nm).

iv. Secure the plastic barrier to the circuit breaker.

v. Secure the inner and outer door panels to the cabinet before restoring power. Torque six

M6 bolts to 48.7 in-lb (5.5 Nm). Be sure to properly align the bolts to avoid cross-

threading.

e. Restore power.

i. Reconnect the generator set starting battery (negative [-] lead first).

ii. If there is an external battery charger, reconnect the battery charger to its AC power

source.

iii. Restore AC power to the automatic transfer switch.

iv. Move the operation selector switch on the generator set to the Remote (or Auto) position.