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ground binding posts (A.A.R.) located on the front of
the charger. Open the small door cover on the front
of the charger by pulling out on the push tabs.
Connect the AC power terminals on the two posts on
the right, as marked on the panel behind the posts.
Connect the AC ground to the terminal lug provided.
WARNING:
FAILURE
CONNECT THE AC VOLTAGE CONDUCTORS
COULD CAUSE SERIOUS DAMAGE TO THE
CHARGER.
BE SURE TO SET THE VOLTAGE
SELECTION SWITCHES ON THE FRONT OF THE
CHARGER TO THEIR PROPER POSITION.
WARNING:
DO
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 left-
most binding posts as marked on the panel behind
the posts (positive on the left and negative on the
right). The DC cables should have quarter-inch (¼")
ring terminals for connecting them to the binding
posts. Check to make sure the polarity of the DC
output wires are the same as those connected to the
battery. The charger will not operate in a reversed
polarity condition. WHEN CONNECTING THE DC
WIRES TO THE CHARGER WITH THE AC
POWER
DISCONNECTED,
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. Close
the door cover on the front of the charger after
tightening all of the binding post nuts.
WARNING:
DO
CHARGER'S TERMINALS OR AN ELECTRICAL
SHOCK COULD OCCUR.
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 front of the
charger.
The other end of the cable has the
temperature sensor sealed in a terminal.
www.nationalrailwaysupply.com
1-800-357-3572
TO
PROPERLY
NOT
OPERATE
THE
A
SPARK
MAY
NOT
TOUCH
THE
A VOLTAGE IS
WARNING:
IT IS IMPORTANT TO MOUNT
THE
TEMPERATURE
BATTERIES
FOR
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.
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.
Securely fasten the temperature probe cable to
protect the probe from being torn from the
battery. Secure the probe's cable to a fixed object
to ensure the probe will not be pulled loose. Use a
cable tie mount on the battery or on the adjacent
battery, if necessary.
8. OPERATION
The battery charger is adjustable with the three
rotary switches on the front of the charger.
switches
(settable
determine the float voltage for the batteries. SET
THE FLOAT VOLTAGE TO THE BATTERY
MANUFACTURER'S SPECIFIED VOLTAGE FOR
77°F. The charger will then electronically charge the
batteries to the voltage specified on the switches.
To set the switches, use a small screwdriver and
turn the switch so that the arrowhead on the slot is
pointing to the desired number. Set the switches in
the following manner: If the desired battery voltage
is 27.2 volts, set the top switch to 2, the middle
switch to 7, and the bottom switch to 2 (see the
figure 8.1). This will provide you with the proper
charging voltage.
SET ON A NUMBER AND NOT BETWEEN
NUMBERS. If a switch is set between numbers, the
output current will go to zero and the yellow charging
LED will flash.
The charger does not have a power switch. When
the AC power is applied to the charger, the DC
output will start and the yellow LED will be on. To
turn off the charger, disconnect the AC power
source.
3
PROBE
ON
PROPER
TEMPERATURE
Torque
this
nut
to
between
20.0
and
BE SURE EACH SWITCH IS
THE
proper
The
35.0)
38502A
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