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PowerGuard Pro control status can be communicated to the user via the LED contained within
the switch. Alternatively, external LEDs can be provided.
vehicle as follows:
Switch 1 - Flat Battery Protection Reset Switch (PowerGuard)
Switch 2 - Toggle Engine Battery (1) Switch
Switch 3 - Toggle Auxiliary Battery (2) Switch
INSTALLATION
Warning!
Isolate power supply before starting installation.
POSITIONING OF PARTS
PowerGuard Pro main components (ECU & Contactors) do not need to be easily accessible from
a user's perspective. Only the control switch needs to be readily accessible to the user.
The following should be observed as parts of the PowerGuard Pro are designed for wet / dirty
environments, but others are not.
PowerGuard Pro ECU:
The ECU is designed for location in a dry / clean environment. The ECU is NOT suitable for
installation or operation in atmospheres where there is a risk of ignition or explosion. The
ECU is NOT suitable for installation outside, under bonnet or in wet / damp cupboards.
Caution! Damage will occur if the ECU is allowed to get wet.
Warning! Do not install the ECU in a petrol/gas engine room environment.
Contactors:
The external isolation contactors are designed to be installed under hood, in wet engine room
environments and battery compartments. The contactor is IP66 rated and will withstand hose
downs. The contactors should be located as close as possible to the associated batteries.
Control Switches:
The switches are designed for location in a dry environment. They should be
mounted on the dashboard or within easy view/access for the vehicle operator.
FIRST FIX INSTALLATION
Pre-Installation Preparation:
•
Disconnect the main positive and negative from each battery bank to ensure no
power is on the vehicle (up to 2 battery banks).
•
Remove items (e.g. seats, access panels etc) to ensure easy installation.
•
Survey the sites where you wish to locate components.
REF: QSF-030
Issue: D
Merlin Equipment Ltd
PowerGuard Pro – User and Installation Guide
Up to 3 Switches can be installed per
Page: 7 of 18
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