19. Alde Heating System; Operating Instructions P; Boiler Design P; Description Of Functions P - Bailey Unicorn Owner's Manual

19. ALDE HEATING SYSTEM

Operating Instructions
Please read these instructions carefully before using
the boiler. These instructions are approved for The Alde
Compact 3010 boiler fitted in caravans, motor caravans
and buildings in accordance with CE no. EMC e5 02
0138, 845 BP-0003. Installation and repairs may only
be carried out by a professional. National regulations
must be adhered to.
Boiler Design
The boiler consists of three eccentrically-fitted cylinders
(heat exchanger, water jacket for the heating system
and, outermost, water jacket for hot water). The two
outer pipes, and their ends and connectors are made
of stainless steel, while the heat exchanger is made of
aluminium. The heat exchanger is divided into two semi-
circles. The burner is located in the upper half, being
the combustion chamber, and the combustion gases
are expelled through the lower half. The burner unit
is fitted on the end of the heat exchanger. It consists
of a combustion fan, burner, solenoid valve and intake/
exhaust connections. Two heating cartridges are fitted
to the water jacket of the heating system. Maximum
output is 3.15kW, depending on model.
Description of Functions

Using LPG

When LPG operation is selected on the control panel, the
combustion fan starts. When the fan speed is correct, it
signals the circuit board that the boiler can be it. The
circuit board sends ignition spark to the spark plug at
the same time as it sends electricity to the solenoid
valve, which opens to allow gas in. The burner ignites,
and a sensor transmits a signal back to the circuit board
that the boiler is lit, and the ignition spark stops. The
burner keeps burning until the boiler thermostat or the
room thermostat reaches the set temperature reading.
Should the boiler go out for any reason, the sensor is
activated and a new attempt is made to start the boiler
(in about 10 seconds). 230 volt heating will not operate
unless the icon showing 230 volt power supply is shown
on the control panel.
Using the heating cartridge
Electrical operation is selected on the control panel, the
12-volt relays on the circuit board trip, allowing the 230
volt supply to reach the electrical elements. The heating
cartridge is controlled in the same way as the gas boiler.
Warm Water
When only warm water is required, for example during
the summer, no settings need to be made; the boiler will
look after this function automatically.
The pump will only start when the temperature in the
vehicle is lower than the temperature (see control panel.)
Important information.
• The boiler must not be started if there is no glycol in
the system.
• The LPG boiler and heating cartridge may be operated
in parallel.
• The heating system may be heated up without the
warm water heater being filled with fresh water.
• Always switch off the main isolator for the boiler when
the vehicle is not being used.
• Always drain the warm water heater of fresh water if
there is a risk of frost.
The LPG boiler must not be operated when refuelling the
vehicle.
When washing the vehicle, take care not to get water in
the roof vent.
The Domestic Hot Water Heater
The boiler is fitted with a built-in warm water heater with
a volume of approx. 8.5- litres fresh water. The warm
water heater can produce around 12 litres of 40°C water
per half hour (at a cold water temperature of 10°C). If the
heating cartridges are used instead of gas for heating
the boiler, the capacity is slightly reduced. Always rinse
out the heater before it is used, particularly if it has not
been in operation for some time.
The hot water is not intended for drinking or
cooking. When the heater is in continuous use,
it should be emptied approx, once a month, to
ensure that a new air cushion is formed in the
heater. The air cushion is essential for absorbing pressure
surges in the heater. For emptying specially-adapted
boilers, as well as any other fresh water systems in the
vehicle, please refer to the manufacturer's instructions.
The warm water should always be drained of fresh water
when there is a risk of frost and when the caravan is not
in use. The warranty does not cover frost damage.
Draining the heater using the combined safety/ drain
valve:
• Switch off the freshwater pump.
• Open all water taps
• Then open the safety/drain valve by raising the yellow
lever (M) to a vertical position.
• The heater will now drain directly below the vehicle
through the safety/ drain valve hose. Check that all
the water is emptied out (about 7-10 litres.) Leave
the valve in the open position until the next time the
heater is used.
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