Computronic Controls Guardian - Manual (Page 5)

CCL Guardian series installation and operation ci0003 issue 4 2014-05-06 p5/8
General
Electrical connection is via labelled spring-clamp terminals
on the Guardian circuit board.
For G150/G300/G600 (open chassis) models: -
For EG150/EG300/EG600 (enclosed) models, remove the
upper 2 screws on the panel front facia (on the plate
containing product labelling), then rotate the front plate
upwards to expose the electrical terminals. Compared with
the open-chassis version above, note the reverse orientation
of the EG series terminals:
Spring-clamp terminal connection is as follows:
Strip and position
the wire just before
the clamping unit. Press down on the
clamp spring and
insert the wire into
the clamp. Release the clamp
spring and check
that the wire is
secure.
DC Output
Before DC connection or disconnection:

Ensure AC supply input is isolated.
Disconnecting the batteries while the
AC supply is live can result in sparking at
the battery terminals, ignition of battery
gasses and serious personal injury.

Check that the charger output is compatible
with battery type & voltage. Incompatibility
may result in damage to the charger,
batteries and serious personal injury.
Connect the Guardian output to the battery terminals,
observing the warnings above and the correct DC polarity.
The Guardian DC charge output uses an automotive type
fuse for protection of reverse polarity and short-circuit
faults. In the event of these faults, isolate the AC supply
and disconnect the output terminals. Ensure the external
fault has been corrected, replace the fuse (see product
labelling for the correct rating), then re-connect and switch
on the charger. If the fuse continues to blow,
return the charger to the supplier for evaluation.
Boost Initiate
The Guardian Auto Boost feature provides an automatic
increase in output voltage, as described on page 3.
In addition, the operator can manually initiate a single
Auto Boost cycle (at any time, regardless of battery
voltage), by linking the 2 terminal
s marked ‘boost’,
e.g. using a momentary push button or panel switch.
Alarm outputs: Charge Fail, Low Volts, High Volts
Guardian is fitted with three alarm relay outputs, each with
SPDT volt-free contacts, rated 1 Amp max. at 30V DC.
During normal operation:

Charge fail and low volts relays are energised (COM
closes to NO contact).

The high volts relay is de-energised (COM closes to NC
contact).
During fault conditions:

The charge fail relay de-energises immediately
following a charging fault, e.g. loss of mains supply.

The low volts relay de-energises on low battery
voltage, and the high volts relay energises on high
battery voltage. A 120 second delay applies to both
relays, allowing for normal battery voltage fluctuations
(e.g. caused by engine cranking).
ELECTRICAL CONNECTION
DANGER !
HIGH VOLTS
WARNING: DANGER OF INJURY OR DEATH. During normal operation, Guardian is
connected to high voltage AC circuits. Before connection, disconnection or handling of
these chargers, ensure isolation of all AC power supplies. Connection or disconnection
with live wiring can also cause hazardous sparking and component damage.
Phase-out
/ Discontinued
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