La Marche A36D, Installation And Operation Manual

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2.6 Installing External Temperature Compensation (Option 11W/11Y)
The natural voltage of a battery changes as a function of temperature change. As the battery temperature rises,
the effective voltage of the battery decreases. Without Temperature Compensation, the battery charger will
always produce a set constant output voltage. As the battery temperature increases, this constant voltage will
then induce a higher output current from the charger. This higher current can result in overcharging the
battery, which in turn can result in damage to the batteries.
Temperature Compensation combats this overcharging by adjusting the charger’s output voltage based on the
temperature read by the temperature probe. In order to increase the accuracy of the temperature
compensation, the external probe can be used to measure the temperature of the battery.
Option 11W includes the compensation circuit and a 24-foot long temperature probe. Option 11Y includes the
compensation circuit and a 100-foot long temperature probe. With either option, approximately two feet of the
probe is taken inside the charger enclosure.
External Probe Connection Procedure
Before making any connections to the A36D, ensure that the AC power is off at the main breaker box and the
charger’s breakers are off. Verify that no voltage is present by using a voltmeter at all input and output
terminals.
NOTE: Procedure only applies on A36D chargers with Option 11W/11Y.
1. Locate the TS-6 terminal strip inside the charger.
2. Connect wire marked F to terminal 1 and wire marked G to terminal 2. Refer to Figure 11.
3. Connect the black lead of the external probe to the other end of terminal 1, and the red lead to the other
end of terminal 2.
4. Place the external probe in a desired location (it is recommended that the battery manufacturer be
consulted for placement of the probe).
Figure 11 – Temperature Compensation Connection
(External and Internal)