Calorifier System; Electrical And Installations - Beta Marine BV1903 Operator's Maintenance Manual

CALORIFIER SYSTEM

All Beta engines can be fitted with the engine tappings
to allow the hot water from the closed fresh
water/antifreeze system to circulate through a calorifier
tank, which in turn heats up domestic water.
Calorifier tappings on this range of engine are shown.
1. The big problem with a calorifier is to remove all the
air from the system. If this is not achieved then they
don't work!
2. Try and keep the supply and return pipes either
horizontal or sloping down in a continuous fall towards
the calorifier. This avoids air pockets being created.
3. Extra care must be taken when first filling the
calorifier circuit system with 50% antifreeze to water
solution as the engine may appear to be full but it soon
disappears into the calorifier pipe work. Run the engine
off load for 10 minutes then check the level as
described in 'Filling The Fresh Water System'.
Also check to see if the pipe going to the calorifier is getting warm. Top up the water level as required
and run for another 10 minutes then repeat.
4. If the water level is steady but no warm water is getting to the calorifier then very carefully open the
calorifier bleed valve (see manufacturers instructions) or if none is provided then very carefully loosen
the jubilee clip securing the supply pipe to the calorifier. Air should escape. Refasten securely when no
further bubbles are seen.
CAUTION
Do not do this when the engine is hot as scalding hot water may be forced out of the pipe under
pressure.
ELECTRICAL INSTALLATIONS
Beta has 4 panel options: 2a
The engine harness is common to all.
1. These panels must not be installed where sea water spray can get at them. A suitable flap or cover
must be fitted.
2. Panels must be fitted in a location where the helmsman can either see or hear the alarm system.
3. For standard wiring diagrams see following pages.
4. Extension looms longer than 3m (10 feet): As an option, Beta can provide various lengths of
extension looms for runs of over 3m, but this kit includes a start relay to overcome the voltage drop.
(See drawing 300-58520)
5. All electrical equipment must be protected from sea water. Sea water or rust in the starter will
invalidate warranty. Care must be taken when pushing the two halves of the plug together to ensure
that individual pins do not push out. To prevent corrosion and assist in assembly we recommend that
the plug is packed with petroleum jelly (Vaseline) and then carefully pushed together. The plastic boots
should cover both halves and overlap. A cable tie is then put round to hold the two halves in position
and help prevent any ingression of water.
6. All cables must be adequately clipped and protected from abrasion.
7. Electrical systems shall be designed and installed so as to ensure proper operation of the craft under
normal conditions of use and shall be such as to minimise risk of fire and electric shock.
8. Attention shall be paid to the provision of overload and short-circuit protection of all circuits, except
engine starting circuits, supplied from batteries.
9. Ventilation shall be provided to prevent the accumulation of gases, which might be emitted from
batteries. Batteries shall be firmly secured and protected from ingress of water
2ab'D' or 2ab'V' or 2ab'V'W
2b
& 2c'D'
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