Fitted Equipment
61
J. Permanent setting. The circulation pump
is switched on and runs constantly. The
thermostat on the control panel controls
the operation of the heating
cartridge/LPG boiler. This setting is used
in particular circumstances, mostly during
the winter. Provides an even flow of heat,
but also reduces the hot water capacity.
K. Knob for setting the desired room
temperature.
L. Index marking for a room temperature of
approx. 22°C.
THE WARM WATER HEATER
ABOUT LPG
The properties of LPG
LPG is a petroleum product, formally known
as 'liquid petroleum gas'. It is mainly made
up of propane and butane gas. The
advantage of propane is that it remains
gaseous at temperatures as low as -40∞
,
while butane loses effectiveness at +10∞C.
For this reason, propane is used in colder
countries. The cylinders contain LPG both in
liquid and gaseous form. Then the cylinders
are filled, the pressure turns the gas into
liquid. When the cylinder valve is opened,
the LPG becomes a gas again. The risk
involved in using LPG is that any leaking gas
may ignite and explode. Since LPG is
heavier than air, any leaking gas will collect
at the lowest point.
LPG contains no toxic substances but
breathing in concentrated gas may have a
certain anaesthetising effect, and can also
result in shortness of breath and symptoms
of suffocation. These symptoms quickly
disappear if the sufferer breathes in ordinary
air or oxygen. Naturally, it is inadvisable to
inhale either LPG or exhaust fumes. To
make it easier to detect gas leaks, a
substance with a distinctly rank smell has
been added.
Combustion
Complete combustion of LPG only generates
carbon dioxide (CO2) and water vapour, just
like the air we exhale. A good supply of air
is essential to ensure complete combustion.
The centre of the flame should be
blue/green. LPG is extremely
environmentally compatible and does not
generate any soot during complete
combustion.
It can be stored in cylinders for an unlimited
time period, without any deterioration of
quality.
Pressure
The LPG burner usually works at a lower
pressure than that in the cylinder. The most
common pressure is a low pressure (0-50
mbar), which is created by allowing the gas
to pass through a reduction valve. There is
also intermediate pressure (50 mbar-2.0 bar)
and, finally, high pressure (over 2.0 bar),
which is unreduced pressure mainly used in
camping equipment. Low pressure and
intermediate pressure are always reduced
pressure.
FAULT FINDING
The boiler does not start
1. No LPG?
2. Is the main tap fully open?
3. If the boiler has not been operated for
some time, or if the gas cylinder has been
changed, it may take longer than normal
to light the boiler.
4. Check that the boiler is connected to the
electricity supply (> 11 V).
5. Check that the fuse (T) for the boiler is
intact.
6. Check whether the overheating protection
has been tripped by unscrewing the black
plastic cap (U) and pressing the reset
button (V).
NB! If the overheating protection has
been tripped it cannot be reset until the
boiler has cooled down by 10-20°C.
Before restarting the boiler, check that it
has been properly bled.
7. Check whether the red LED on the
control panel has gone out. If not, switch
off the boiler. Wait 30 seconds and then
try restarting it.
8. Check that the boiler's electrical
connections are properly attached.
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