General Product Information

Please read the following information before installing. A visual inspection of this product for damage during shipping is recommended before installation. It is your responsibility to ensure that qualified mechanical and electrical technicians install this product.

The Guardian charger provides automatic, current limited and voltage controlled charging of vented lead acid batteries. It may be used in a wide range of industrial charging applications, including batteries for standby engines, pumps and generators.

This charger is designed for connection to only one battery. Do not use more than one charger per battery, or more than one battery per charger.

The charger is supplied in an enclosed stainless steel panel suitable for wall mounting.

NOTE: In event of no AC supply to charger, the voltmeter will display the DC voltage of any connected DC equipment.

Each unit consists of a transformer, rectifier and thyristor control circuit. The control circuit ensures that the charger maintains a battery voltage at the pre-calibrated float level, while supplying any additional load current up to the specified maximum.

Auto Boost (Equalizing) Operation

Auto boost operation provides an increased output voltage when batteries are below a preset point. Once the batteries have reached the boost voltage the charger reverts to its float voltage. This operation equalizes the batteries, maximizing battery life and capacity.

Boost Initiate Operation

The boost initiate switch forces the charger to enter an auto boost cycle even if battery voltage is above the preset point. Once this operation is completed the charger returns to it’s float voltage.

Temperature Compensation

The remote temperature compensation provides control of the output voltage based upon temperature. As temperature increases the charging voltage is decreased at a negative coefficient of 3mV/°F/Cell.

Charge Fail and Alarms

A self diagnosis ‘charge fail’ circuit and relay output is provided along with under and over voltage warnings. The dry contact relay outputs de-energize in the event of a charging fault or high/low battery state.

Electrical connection of the AC supply and DC output and alarms are via spring-clamp terminals.

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