ELECTRICS
85
The following table shows the rating and circuit
allocation for the three MCB’s
MCB Rating Output wire colour Description
1 10 Amps White 230v Sockets
2 10 Amps White
(Yellow for heater)
Extra 230v Sockets /
Space Heater
2 16 Amps Yellow Alde heating (EC470 PSU only)
3 10 Amps Black
(Blue for water heater)
Fridge / Water heater / 12v
Charger (internally connected)
3.2 Battery Charger
The EC444 / EC445 / EC455 system
incorporates an intelligent three-stage battery
charger / power converter.
During stage 1 the battery voltage is increased
gradually while the current is limited to start the
charging process and protect the battery. At
stage 2 the voltage rises to 14.4V to deliver the
bulk charge to the battery. When the battery
is charged, the voltage is decreased at stage
3 to 13.6V to deliver a float charge to maintain
the battery in the fully charged state. The
charger can be left switched on continuously
as required.
The battery charger / power converter also
provides power to the leisure equipment
when the mains supply is connected. This
module supplies DC to the leisure equipment
up to a maximum of 25 Amps (300 Watts),
therefore the available power is distributed
between the leisure load and the battery,
with the leisure load taking priority as per the
following example:
Lesiure Load Available power
for battery
charging
5A 20A
10A 15A
15A 10A
20A 5A
! WARNING: Under heavy loads the
Charger case may become hot. ALWAYS
ensure the ventilation slots have a clear flow
of air. Do not place combustible materials
against / adjacent to the Charger
3.3 Leisure Battery
a. Type / Selection
For optimum performance and safety it
is essential that only a proprietary brand
LEISURE battery is used with a typical
capacity of 75 to 120 Ah (Ampere / hours). A
normal car battery is NOT suitable.
This battery should always be connected
when the system is in use. The PSU is
configured to work with standard lead acid
leisure batteries, and in most cases is also
compatible with the latest range of Absorbed
Glass Matt (AGM) batteries. Before fitting
non-standard batteries please check that the
charging profile described in 3.2 is suitable for
the type of battery by referring to the battery
documentation or battery manufacturer.
The battery feed is fitted with an inline fuse
between the battery and the electrical harness,
and is usually located immediately outside the
battery compartment or within 500mm of the
battery. The maximum rating of this fuse is 20A
per battery.
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