S&C Instruction Sheet 768-550 23
Control Setup
Charging the Battery Packs
If the communication and control unit will not be placed in
service by the date marked on the control unit or shipping
container tag, the battery charger (Type CCU-SP) or the
battery charger/switch control (Type CCU-XP) must be
connected to an isolated 120-Vac power source to charge the
battery packs.
CAUTION
The control unit enclosure must be properly grounded
before connecting a 120-Vac source to the battery
charger (Type CCU-SP) or the battery charger/switch
control (Type CCU-XP) . Failure to ground the enclosure
can result in electrical shock .
For Type CCU-SP:
Follow these steps to charge the batteries:
STEP 1.
Make sure that the power switch on the bat tery
charger is in the
Off
position.
STEP 2.
Ground the enclosure using the ground lug on the
back of the enclosure.
STEP 3.
Place the battery charger input selection switch in
the
External Source
posi tion.
STEP 4.
Connect an isolated 120-Vac source to the two
terminals marked EXT/AC, or to the fuse blocks if
either the “U1” or “U3” external ac control options
are provided. See Figure 22.
STEP 5.
Place the power switch on the battery charger in the
On
position and allow the battery packs to charge
for 24 hours.
STEP 6.
After charging the battery packs, place the power
switch on the battery charger in the
Off
position.
Then, disconnect the 120-Vac power source and
return the bat tery-charger input-selector switch to
the
Voltage Sensor Source
position.
Figure 22. Fuse block for connection of ac control power.
