Murphy BCEG-12-10 Automatic Battery Charger, Connection to Power Supply, Connection to Batteries

The BCEG-12-10 and BCEG-24-10 models are fitted with a self-resetting polyfuse on the DC output. If reverse polarity or short circuit faults occur, turn off AC power and disconnect the outputs. This will allow the polyfuse to reset. The charger can then be re-connected and switched back on. No replacement of output fuse should be necessary. If fuse fails to reset, the charger should be returned to supplier. BCEG-24-20 models are fitted with an automotive type blade fuse. Ensure correct rating when replacing fuses.

Automatic Battery Charger

The Guardian is an automatic battery charger. If battery voltage falls below a preset voltage (12.2V on a 12V lead-acid battery) the charger will automatically enter an increased charging voltage state (boost). Once the batteries have reached a charged state, the charger will switch to it’s normal “float” voltage. This prevents over-charge, which in turn prevents the battery from over-gassing and subsequently maximizes battery life.

Connection to Power Supply

Ensure supply is off before connection is made to charging unit. Ensure unit is properly grounded to the charger’s metal chassis.

CAUTION: Ensure correct AC voltage is supplied to unit. Applying 240VAC on a 120VAC unit will destroy it and could cause serious personal injury.

Connection to Batteries

Ensure power supply is off before connecting charger to batteries. Ensure battery type and voltage are correct before connecting to batteries.

WARNING: Charging either different voltage or type of batteries from stated type may result in damage to both the charging unit and/or batteries and could result in serious personal injury.

Disconnection of Batteries

Ensure power supply is off before disconnecting charger from batteries.

WARNING: Disconnecting the batteries while power supply is connected to the charger could result in a spark at battery terminals, which could ignite the hydrogen given off from the batteries.

Boost Initiate Connection

The charger will be in it’s normal mode of operation while the boost link is broken. Upon connecting the two boost initiate terminals the charger will perform a single auto-boost cycle. While the charger outputs a higher voltage, once the battery voltage has reached this point, the charger returns to it’s normal float mode of operation.

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