Instruction 1905072708 Rev A - 1 -
Unpacking Battery Charger
Packed with each charger is a temperature sensor plug and two MOV assemblies. These may already be
installed when received. Inspect the charger for any damage during transit and report it immediately to the carrier.
DO NOT INSTALL THE CHARGER IF THERE IS EVIDENCE OF ANY SHIPMENT DAMAGE.
Battery Charger Installation
Location of the charger installation requires air flow for convection cooling of the equipment. There should be a
minimum space of 2” on the sides and 3” above the top of the charger for free air flow. Mounting keyhole brackets,
on a 5.25” centerline, are provided at the top of the charger rear panel. Proper gage wiring must be used to avoid
voltage drops across the DC wiring to the batteries.
DO NOT PLACE ANYTHING ON TOP OF THE CHARGER WHEN OPERATING. DAMAGE TO THE
CHARGER OR BATTERIES MAY OCCUR.
The two MOV assemblies are installed at the time of AC input power line connection. Connections are made to
the terminal board behind the electrical cover plate (see page 2 photo). The 320 volt MOV (longer lead wires) is
attached to the AC terminals of the input terminals. The 150 volt MOV (shorter lead wires) is attached to the
Ground terminal and the AC terminal next to it. Set the voltage selector switch on the front panel to the desired
input voltage (120 or 240). In either application the MOV installation remains the same. Connect the power source
wires to the AC input terminals making sure to provide a solid ground wire connected to the terminal marked GND.
The DC output portion of the charger should not be connected to batteries until all control switches and adjustments
have been made on the front panel. IF THE BATTERIES ARE CONNECTED AT THIS TIME A SPARK WILL
OCCUR DUE TO CHARGING OF THE FILTER CAPACITOR INSIDE THE CHARGER.
MAKE SURE ALL MOV AND INPUT POWER LINES ARE CONNECTED PROPERLY BEFORE
THE CHARGER IS ENERGIZED. CHARGER MUST BE SOLIDLY GROUNDED!
Battery Charger Control Set-up
1. Select the battery type Lead-Acid or Nickel-Cadmium.
2. Select the number of cells, 1 - 4 cells (ON to the left, OFF to the right).
3. Do not connect the temperature sensor plug or cable at this time.
4. Connect a digital DC Voltmeter to the charger DC output terminals.
5. Turn ON the AC main power supply to the charger.
6. After allowing the charger output voltage to stabilize, set the FLOAT VOLTAGE ADJUST potentiometer to the
desired float voltage. Recommended voltages at 77°F (25°C) are as follows;
Lead Acid Flooded = 2.20 volts/cell
Lead Acid Sealed = 2.25 volts/cell
Nickel Cadmium = 1.47 volts/cell all +/- .03 volts/cell
Always refer to the battery manufacturer’s recommendations for charging voltages.
7. Turn OFF the AC main power supply to the charger.
8. Connect the temperature sensor plug or cable to the front panel.
9. The batteries may now be connected to the DC output positive and negative terminals.
CAUTION: POLARITY OF THE DC CONNECTIONS MUST BE CORRECT.
Battery Charger Maintenance
The charger should be kept clean, dry and the electrical connections checked periodically for proper torque (30
inch/pounds). Surge suppressors (MOVs) should be inspected for damage to ensure continued protection. Verify
LEDs are functional. No other routine maintenance is required for this equipment.
Special Application
With the DC output being filtered through a high current electrolytic capacitor, there are also applications when
this charger can be used as a DC power supply. Contact the factory for further information.
