GB
Chapter Page
How the boiler is constructed 131.
Technical data 131:1
How the boiler works 132.
The functions of the control panel 132:1
Starting the LPG boiler 142:2
Shutting down the LPG boiler 142:3
Setting for maximum comfort 142:4
Setting the room temperature 142:5
Circulation pump 142:6
Electrical heating 142:7
External start 143.
Water heater 154.
Maintenance of the heating system 155.
Bleeding the heating system 155:1
Useful facts about LPG 156.
Troubleshooting 167.
Guarantee 168.
Read these instructions carefully before you use the boi-
ler. The instructions for use are approved in accordance
with CE no. 048AO-0006 for LPG boiler type 2923.
Data plate and production number are located inside the
metal shell beside the expansion vessel.
HOW THE BOILER IS 1.
CONSTRUCTED
The boiler operates with what is known as constant tem-
perature, i.e. there is always heated liquid in the boiler to
circulate in the system when the room thermostat calls
for heat. In other words there is no time lag when heat is
most needed.
There is an inlet pipe in the bottom of the boiler which
leads air to the combustion chamber. The gas valve and
the burner assembly are attached to an easily remov-
able plate screwed to the combustion chamber at the
bottom of the boiler. The water jacket, which consists
of an inner and an outer pipe, is located above the
combustion chamber. The space between these pipes
constitutes the reservoir. Inside the inner pipe there is a
ame damper which consists of a folded sheet of metal.
Its task is to convey the hot exhaust gases from the
burner out towards the water jacket so that the water is
heated. From the top of the water jacket, a pipe goes up
to the expansion vessel. In the expansion vessel there
is a 12-volt pump which circulates the heated liquid in
the system. On the front of the boiler is the control panel
with thermostat knob, cut-out, power intake and change-
over switch. At the top of the boiler there is a terminal
block for making the electrical connection to the boiler.
Beside the boiler, a ventilation duct is attached that
takes in fresh air from outside and conveys it into the
boiler but outside the combustion part itself. The fresh
air is heated by the body of the boiler and convected
through the ventilation grille in the front panel out into
the room.
Technical data1:1
Gas: Butane/Propane
Power: 6.7 kW
Gas consumption: Max 465 g/h
Gas pressure: 28 mbar (butane) or 37 mbar (propane).
Liquid volume (glycol water) in boiler: 2.6 litres
Liquid volume (glycol water) in
immersion heater: 1.0 l.
System temperature in the boiler: 35-75
°
C
HOW THE BOILER WORKS2.
When the room thermostat calls for heat, the circulation
pump starts. The liquid in the system starts circulating,
and cold water comes into the boiler. The sensor on
the water jacket senses that the water is colder than
the temperature set on the boiler thermostat. The main
burner ignites and heats up the water that circulates
round the system. When the heat inside the caravan has
reached the temperature set on the room thermostat,
the circulation pump stops. The sensor on the boiler
senses that the water has reached the temperature set
on the boiler thermostat. It shuts off the main burner and
goes down to a pilot ame. When the water temperature
has fallen a few degrees in the boiler, the main ame is
lit again. In this way there is always heated water when
the room thermostat calls for heat.
Thefunctionsofthecontrolpanel(g2:1
1)
Normal position for immersion heater. The heating A.
element is controlled by the room thermostat.
Constant position for the immersion heater. The heat-B.
ing element is controlled by the immersion heater’s
thermostat. The changeover switch should be in this
position when the water heater is in use.
1000 watts power on the immersion heater.C.
2000 watts power on the immersion heater.D.
230-volt circulation pump on the immersion heater.E.
12-volt circulation pump on the boiler.F.
Normal position for 12 and 230-volt circulation pumps. G.
The selected pump starts and stops as indicated by
the room thermostat.
Constant position for 12 and 230-volt circulation H.
pumps. The pump runs constantly and the room
temperature is regulated by the boiler’s thermostat
knob, in that the boiler’s system temperature is
adjustable. The constant position uses for example
when there are many persons in the caravan. If
one sits near the room thermostat it can switch the
circulation pump off, with cold areas near the win-
dows and oor as a result. In this position the pump
is constantly on and coldness is avoided.
Cut-out 1 A fuse.I.
Power intake 12 V DC auxilary sockel (used for J.
external start etc. See chpt 3:0).
Warning light for ignition spark.K.
Thermostat knob.L.
