Electrics
50
ESM4 ELECTRICAL SUPPLY
MODULE
The ESM4 Electrical Supply Module is a
230V AC and 12V DC power supply &
control unit. It provides all the necessary
features for control of the electrical circuits in
a caravan or motorhome. The unit provides
the following features:-
- MAINS MODULE with Earth leakage
protection (RCD) Over-current protection
(MCB’s)
- CHARGER on/off switch
- SPACE HEATER on/off switch
- WATER HEATER on/off switch
- 18AMP TRANSFORMER / CHARGER with
Over-current, Short-circuit, Reverse polarity
& Thermal protection
MAINS MODULE
The ESM4 is designed to operate on a mains
supply of 230V ~ AC +/–10% (making it ideal
for use with low continental voltages). The
40 amp RCD (Residual Current Device) gives
protection against earth faults and also acts
as the main isolator switch. The mains
module also has three MCB's (Miniature
Circuit Breakers), which are basically
re-setable mains fuses, to protect against
over current. Allocation of the MCB's is as
follows: -
- MCB1- SOCKETS / SPACE HEATER
(if fitted)
- MCB2- WATER HEATER / LIGHTS (if fitted)
- MCB3- FRIDGE / CHARGER
USING A GENERATOR
When using a generator in conjunction with
the ESM4 the following must be observed,
failure to do so may result in damage to the
unit:
1. Always start the generator with the mains
isolator in the caravan turned off.
2. Allow the generator to warm up for a few
minutes before energising power in the
caravan, as the output voltage can be
higher when cold.
3. Check the generator output voltage
regularly to ensure it is within the
specification of the ESM4 system
i.e. 230V ~ AC ±10%
ROADS LIGHTS FUSES
The fuses are located on the front bulkhead
of the right hand front locker.
Fuse Ratings
1 LH ROAD 5A
2 RH ROAD 5A
3 LH INDICATOR 7.5A
4 RH INDICATOR 7.5A
5 FOG 7.5A
6 STOP 7.5A
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