Swift 2005 MH, Owner'S Handbook Manual

Page: 38 / 108

Electrical Systems
12V POWER SYSTEM
Note: The connection of the battery charger
to the mains supply is in accordance with the
Regulations for Electrical Installations 16th
Edition (IEE Wiring Regulations) BS 7671:
1992.
The Power System is supplied fitted remotely
in a convenient position and comprises:
(a) Mains Unit
(b) Transformer/Charger Unit
TRANSFORMER/CHARGER UNIT
The transformer/charger unit has important
safety features:
• Overload protection
• Short circuit protection
• Reverse battery polarity protection
The unit has been designed not only to
operate as a battery charger, but also for use
as a power supply, should a 12V DC battery
not be present in circuit. It is, however,
recommended that a good quality leisure
battery is installed.
Once connected to a 230V mains supply and
switched on, its operation is fully automatic.
When used as an alternative DC power
supply, with no battery in circuit, the unit will
supply a suitable output for use with pump,
lighting, TV, radio etc.
Under normal circumstances the total load
required by motorhome equipment should
not produce an overload situation.
The facility for drawing 12V supply from the
cab battery is intended for standby situations
only, and care should be taken not to run the
cab battery too low, some models feature
cab battery protection circuitry.
If the cab battery has been used on site, then
the engine driven alternator will recharge
both it and the leisure battery whilst
travelling.
36
Charger/Transformer
If the unit does switch off, the test is
complete and the switch can be re-set
restoring the supply back to normal.
Add together the current ratings for each
electrical appliance you wish to use
simultaneously and ensure the total does not
exceed 10A. You will find the following table
a useful guide to typical values.
230V MAINS CONSUMPTION
FRIDGE 0.5A
CHARGER 1A
ULTRASTORE WATER HEATER 3.75A
(where fitted)
ULTRASTORE SPACE HEATER 8.75A
(where fitted)
COMBI EH (where fitted) 3.9A/7.8A
Formula for calculating current consumption
of appliances:
Watts
Volts
= Amps