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The charger will charge the battery at approximately 15% its normal rate (i.e. 6 amps for a 40
amp charger) until the battery reaches a maximum voltage of 15.5 volts (31.0 volts for a 24V
battery, etc.) and then reduce the current as necessary to maintain the battery at that voltage.
Three hours after the Equalize cycle begins, the charger will return to the float mode where
the battery can be maintained indefinitely. If the battery temperature reaches 120 degrees
F (50 degrees C) the equalize cycle will end and the charger output reduced to a very low
voltage until the battery cools, and then the charger will return to the float mode.
Remote Battery Temperature Sensor Installation
The remote battery temperature sensor allows the monitoring of the battery bank so that
the charging profile can be adjusted to optimally charge the battery bank depending on the
temperature of the battery bank. NOTE: The temperature sensor must be used during an
equalize cycle or damage to the battery may occur.
The battery temperature sensor may be installed in many different ways, so long as the sensor
stays in contact with the battery. The preferred method is as follows:
The batteries to be charged will be placed on a platform made of wood. Prior to placing the
batteries on the wooden platform a cavity is hollowed out such that the sensor will fit inside
the cavity and be flush with the surface. Place the sensor inside the cavity facing the proper
way (this is shown on the sensor). Plug the sensor into the connector marked ‘TEMP’ on the
front of the charger. If only one battery sensor is used, it MUST be plugged into the ‘BATT 1’
location.
If a battery blanket is used the sensor may be tucked inside the blanket with the proper side of
the sensor facing the battery. The sensor may be placed on top of the battery but it should be
secured to the battery so as to prevent it from losing contact.
Battery Charger Temperature Compensation
The charger is calibrated with the sensor input preset to 77 degrees (25 degrees C). For
example, for a 12V battery, this voltage is 13.6 volts, and 27.2 volts for a 24V battery. See the
specifications for the temperature compensation coefficient.
Battery Over-temperature Shutdown
If the battery reaches a temperature greater than 120 degrees (49 degrees C) the BATTERY
OVERTEMP LED will turn on, the audible alarm will sound and the charger will shut down.
Note: This alarm will operate in both normal 2/3 stage charge mode and in Equalize mode.
To restart the unit the temperature of the battery needs to return to a normal operating range
and the charger power switch toggled OFF/ ON.
