Alde Comfort 2923, Руководство по обслуживанию

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1:0 ABOut thE AlDE hEAtIng SyStEm
The heating system consists of up to three heat sources,
LPG boiler, 230 volt electrical cartridge, as well as a heat
exchanger for motor caravans and boats. Alde’s LPG
boilers can be combined in many ways. Solely LPG - LPG
boiler and electrical cartridge - LPG boiler and warm water
heater or LPG boiler, electrical cartridge and warm water
heater. The electrical cartridge and warm water heater do
not take up any extra space when they are installed at the
rear of the boiler.
The LPG boiler/electrical cartridge heats up a liquid mixture
consisting of water (60%) and glycol (40%). With the help
of a 12 volt circulation pump which is located in the expan-
sion chamber of the boiler, or a 230 volt pump fitted to the
electrical cartridge, the warm glycol/water is circulated
round the system through pipes and radiators. The radia
-
tors, which are located along the outer walls, heat up the air
which rises and warms the walls and furniture. Since warm
air rises, it forms an air-barrier which keeps the cold away
from the windows. The temperature inside the caravan
is controlled by a 12 volt room thermostat. Thanks to the
design of the boiler, and to the fact that it is fitted inside the
caravan, incoming fresh air is warmed by the boiler’s own
heat.
1:1 OPERAtIng thE hEAtIng SyStEm
Check the liquid level in the heating system regularly, in
the expansion chamber of the boiler. The level should be
approximately 10 mm above the min. line with the boiler
cold. The system must be filled with a 40% glycol mix of the
same type as is used in car engines.
If the heating installation has been exposed to a tempera-
ture below - 25° C, the glycol content must be increased,
but not, however, above 50%. When topping up the liquid,
the glycol concentration should be checked to prevent
excess concentration. The glycol mix should be replaced
every second year, since its properties, such as corrosion
protection, degrade over time. The heating system must
never stand empty of the glycol fluid.
The liquid in the system is drained through a drainage tap
which is usually located under the caravan entrance.
Re-filling with liquid:
Ensure that the caravan or boat is level, and check that the
air screws and drainage tap are closed. Remove the upper
front plate on the boiler. Then slacken the plastic cap on
the circulation pump and lift up the pump. Then carefully
pour the glycol mix into the expansion chamber. When the
system is being filled, air-pockets may form, depending on
how the pipe-system was installed. (A good indications that
there is air in the system is when the heat only travels a few
metres along the pipe from the boiler, despite the fact that
the circulation pump is operating). To make refilling simpler,
use Alde’s filling pump (fig 3) which both fills and bleeds the
system automatically.
Bleeding the system (manually):
The LPG boiler must be operating and the circulation pump
switched off. Begin by opening the air screws (see the
builders instruction book for their location). Keep them open
until liquid comes out of the spout at the air screw. Start the
circulation pump and let it run for a few moments. Check
whether the pipes and radiators all round the system are
warm.
If the air has not know disappeared, proceed as fol -
lows: The LPG boiler must be operating, and the circula -
tion pump switched off. If in a caravan lower jockey wheel
as far as possible, so that the caravan tilts. Let it remain
like that for several minutes, so that any air rises upwards
in the system. Open the air screw at the highest point, and
keep it open until all the air has escaped. Then wind the
jockey wheel to its maximum position and repeat the pro
-
cedure in that position. Then return the caravan to the level
position and start the circulation pump. Check that heat
is present all round the caravan. When bleeding a bogey
wagon or motor caravan, it is easiest to park on a steep
slope or to lift the vehicle up using a jack.
If in a boat consult the boat builders instructions. Ensure
all radiators are bled after filling the system if a calorifier
is incorporated check the bleed valve here if incorporated.
Allow all air to escape before operating of pumps. Operate
the boiler and circulation pump check once again for air
pockets and ensure all the system reaches temperature.
Fig .
Fig .
Fig 1.
Convectors
Air-screw
Drainage
tap
Electrical
cartridge
Warm water
heater
LPG boiler
Filling Pump
Art nr 1900 811
Roof vent
Window
Air intake
Convectors