FieldSmart
®
Fiber Active Cabinet (FAC) 400
Installation Manual
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134
Replacing a Battery Heater
If the optional battery heater fails or becomes damaged, you can replace it in the field. Replacing a battery heater requires
removing the batteries from the battery compartment.
To replace a battery heater
At the rectifier shelf, switch the battery breaker to OFF.
At the AC load center, switch the Battery Heater breaker to OFF.
Remove the battery compartment door. See Operating Cabinet Doors for instructions.
If present, remove the batteries from the battery compartment. See Replacing Batteries for battery removal
instructions.
Remove the battery heater from the battery tray:
a.
Disconnect the heater power cord from the supply lead, located on the left compartment wall.
b.
Disconnect the thermostat from the side of the battery tray.
c.
Lift the battery heater out of the battery tray.
Install the new battery heater into the battery tray. See Installing a Battery Heater for instructions.
Re-install and reconnect the batteries. See Installing Batteries for instructions.
At the AC load center, switch the Battery Heater breaker to ON.
Replace the battery compartment door and switch the battery breaker to ON.
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