National Railway Supply ERB-C 12/201 Installation, Operation And Service Instructions - page 3
www.nationalrailwaysupply.com 3
01434J
WARNING: IMPROPER JUMPER
CONNECTION MAY CAUSE SEVERE DAMAGE
TO THE CHARGER AND THE BATTERY.
Configure the jumpers for your AC voltage source
(refer to the jumper diagram below). Place the AC
and grounding ring terminals on the binding posts
and tighten the post nuts.
WARNING: FAILURE TO PROPERLY
CONNECT THE AC VOLTAGE CONDUCTORS
COULD CAUSE SERIOUS DAMAGE TO THE
CHARGER.
WARNING: DO NOT OPERATE THE
CHARGER WITHOUT PROPER GROUNDING.
IMPROPER GROUNDING CAN RESULT IN THE
RISK OF AN ELECTRIC SHOCK.
6. DC
OUTPUT
The DC output wires are connected on the two right-
most binding posts as labeled on the top of the
charger (positive on the left and negative on the
right). The DC cables should have quarter-inch
(1/4") ring terminals for connecting them to the
binding posts. Check to make sure the polarity of
the DC output wires is the same as those connected
to the battery. WHEN CONNECTING THE DC
WIRES TO THE CHARGER WITH THE AC
POWER DISCONNECTED, A SPARK MAY
OCCUR. This is caused by the output capacitors
being charged by the batteries. If the DC polarity is
reversed, a circuit breaker will protect the charger
from internal damage. Correct the reversed wires
and push the circuit breaker button back in.
Replace the door cover on the front of the charger
after tightening all of the binding post nuts.
WARNING: DO NOT TOUCH THE
CHARGER'S TERMINALS OR AN ELECTRICAL
SHOCK COULD OCCUR. A VOLTAGE IS
PRESENT ON THE DC TERMINALS EVEN AFTER
THE AC IS DISCONNECTED BECAUSE OF THE
ENERGY STORED IN THE CAPACITOR.
7. TEMPERATURE
PROBE
The external temperature probe is an optional way
of extending battery life by using temperature
compensation. One end of the temperature probe
cable has a three-pin plug, which plugs into a
receptacle labeled TEMP PROBE on the frontof the
charger. The other end of the cable has the
temperature sensor sealed either in a terminal or
small metal box.
WARNING: IT IS IMPORTANT TO MOUNT
THE TEMPERATURE PROBE ON THE
BATTERIES FOR PROPER TEMPERATURE
COMPENSATION. IF THIS CANNOT BE DONE,
LOCATE THE PROBE AS LOW AS POSSIBLE IN
THE BUNGALOW OR CABINET.
Terminal-Type Probe
The terminal-type probe should be attached to the
negative (-) battery post near the center of the
battery pack. If the threaded stud is long enough
above the battery jumper nut, attach the probe with
another nut. Torque this nut to proper
specifications. If the stud is too short, the nut
holding the jumper wire will need to be removed.
Open or remove the load and charging circuits to the
batteries. Remove the nut holding the jumper and
add the probe, then torque the nut to the proper
specifications. Then close or connect the load and
charging circuits back to the batteries.
Box-Type Probe
The metal box has a high performance contact
adhesive tape for attaching it to the battery. To
attach, clean a spot for the probe on the middle
battery about three inches (3") down from the top of
the battery. Make sure the spot is free of all dirt and
oil or the probe will not adhere properly. For proper