Bleeding The System - Alde Compact 3020 Gebrauchsanweisung & Montageanleitung

BLEEDING THE SYSTEM

Depending on how the pipes have been
fi tted, air pockets may form when the
system is fi lled with ethylene glycol fl uid.
If the pipes only warm up a metre or so
from the boiler, even though the circula-
tion pump is operating, this is a symptom
of air trapped in the system.
In a newly fi lled system, small air bubbles
can form in the expansion tank, resulting
in a gurgling sound. Switch off the circula-
tion pump for a few seconds to allow the
bubbles to disappear.
Bleed as follows:
If a bleed screw is fi tted to the outgoing
pipe of the boiler, open this screw and
leave it open until fl uid starts coming out.
If the boiler is fi tted with an automatic
bleeder, the boiler will be bled automati-
cally. Start the LPG boiler. The circulation
pump should be switched off. Open the
remaining bleed screws in the system
(please refer to the instruction manual of
the vehicle for their locations).
Leave the bleed screws open until ethy-
lene glycol fl uid starts coming out of them,
and then close them. Start the circulation
pump and let it run for a while. See if the
pipes and radiators are heating up around
the vehicle.
If this does not help, you can try the
following method:
Single-axle caravan: Switch off the
circulation pump. Tilt the caravan for-
wards. Leave it in this position for a few
minutes to allow the air to travel upwards
in the system. Open the bleed screw loca-
ted at the highest point. Leave it open until
ethylene glycol fl uid comes out. Proceed
in the same manner but with the caravan
tilted backwards. Then position the cara-
van horizontally and start the circulation
pump. See if the pipes and radiators are
heating up around the vehicle.
Motor caravan or twin-axle caravan:
For these, the easiest way to bleed the
system is to park the vehicle on sloping
ground or to raise one end of the vehicle
using a jack. Bleed the system as descri-
bed above.
Downloaded from www.Manualslib.com
ABOUT LPG
The properties of LPG
LPG is a petroleum product. Its full
name is "liquid petroleum gas". Its main
constituents are the gases propane and
butane. The advantage of propane is that
it remains gaseous at temperatures as low
as -40°C, whereas butane is less effective
below +10°C. For this reason, propane is
used in colder countries.
The cylinders contain LPG in liquid and
gaseous form. When the cylinders are
fi lled, the pressure turns the gas into liquid
form. When the cylinder valve is later
opened, the LPG reverts to its gaseous
form.
The risk with LPG is that any leaking gas
may ignite and explode. Since LPG is
heavier than air, any leaking gas will tend
to collect at the lowest point.
LPG contains no toxic substances. Howe-
ver, inhalation of concentrated gas may
have a certain anaesthetising effect, and
can also result in shortness of breath and
symptoms of suffocation. These symp-
toms quickly disappear once ordinary air
or oxygen is inhaled.
Naturally, it is not advisable to expose
yourself to situations where you risk inha-
ling either LPG or exhaust gases.
To make it easier to detect a potential leak
of LPG, a substance with a distinctive
pungent odour has been added to it.
Combustion
When LPG is fully combusted, only
carbon dioxide (CO2) and water vapour
are given off, just like in the air we exhale.
A good supply of air is essential to ensure
full combustion.
WARNING: Always make sure the fl ue
outlet is well ventilated. It is not a good
idea to inhale the exhaust gases. Make
sure the fl ue does not exit into an enclo-
sed area, e.g. an awning.
LPG is very easy on the environment and
does not generate soot once fully com-
busted.
It can be stored in cylinders for an unli-
mited period without any deterioration in
quality.
Pressure
The LPG burner works at a lower pres-
sure than that in the cylinder. Low pres-
sure (0-50 mbar) and medium pressure
(50 mbar-2.0 bar) are obtained by sending
the LPG through a reducing regulator.
High pressure (above 2.0 bar) is unre-
duced pressure used mainly in camping
equipment. Low pressure and medium
pressure always result from a reduction in
pressure.
manuals search engine
TROUBLESHOOTING
If the boiler is fi tted with a digital control
panel, always start by checking any error
messages.
The boiler will not start on gas
1. No LPG?
2. Is the main tap fully open?
3. Check that the type of LPG used is
suitable for the prevailing outdoor tem-
perature. Butane is unsuitable for use
at temperatures lower than +10°C. Use
propane instead.
4. If the boiler has not been operated for
some time, or if the LPG cylinder is
new, it may take longer than normal to
light the boiler.
5. Check that power is being supplied to
the boiler (> 11 V).
6. Check that the fuse for the boiler has
not blown.
7. Check whether the electrical connec-
tions on the boiler are secure and tight.
8. If none of the above helps, contact a
9. service workshop.
The electric element is not wor-
king
1. Check that power (230–240 V) is being
supplied to the electric element.
2. Check that the relays fi tted to the
boiler come on (a slight click can be
heard from the relays when the electric
element is switched on at the control
panel).
3. If none of the above helps, contact a
service workshop.
WARRANTY
Alde's warranty is valid for one year from
date of delivery and is restricted to defects
of material or manufacture. It is conditio-
nal on the boiler having been installed and
operated in accordance with the installa-
tion and operating instructions.
The warranty does not cover frost
damage.
NB! Only original parts from Alde are to
be used as spare parts.
11