Alde COMFORT 2923 Instructions D'emploi page 13

Page Chapter
11 1:0 How the boiler is constructed
11 1:1 Technical data
11 2:0 How the boiler works
11 2:1 The functions of the control panel
12 2:2 Starting the LPG boiler
12 2:3 Shutting down the LPG boiler
12 2:4 Setting for maximum comfort
12 2:5 Setting the room temperature
12 2:6 Circulation pump
12 2:7 Electrical heating
12 3:0 External start
13 4:0 Water heater
13 5:0 Maintenance of the heating system
13 5:1 Bleeding the heating system
13 6:0 Useful facts about LPG
14 7:0 Troubleshooting
14 8:0 Guarantee
Read these instructions carefully before you use the boiler.
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.
1:0 How the boiler is constructed
The boiler operates with what is known as constant tempera-
ture, 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 removable 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 flame 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 changeover 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.
1:1 Technical data
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.
GB
System temperature in the boiler: 35-75
2:0 How the boiler works
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 flame.
When the water temperature has fallen a few degrees in the
boiler, the main flame is lit again. In this way there is always
heated water when the room thermostat calls for heat.
2:1 The functions of the control
panel (fig 1)
A. Normal position for immersion heater. The heating element
is controlled by the room thermostat.
B. Constant position for the immersion heater. The heating
element is controlled by the immersion heaterʼs thermostat.
The changeover switch should be in this position when the
water heater is in use.
C. 1000 watts power on the immersion heater.
D. 2000 watts power on the immersion heater.
E. 230-volt circulation pump on the immersion heater.
F. 12-volt circulation pump on the boiler.
G. Normal position for 12 and 230-volt circulation pumps. The
selected pump starts and stops as indicated by the room
thermostat.
H. Constant position for 12 and 230-volt circulation pumps. The
pump runs constantly and the room temperature is regulated
by the boilerʼs thermostat knob, in that the boilerʼs 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 circula-
tion pump off, with cold areas near the windows and floor
as a result. In this position the pump is constantly on and
coldness is avoided.
I. Cut-out 1 A fuse.
J. Power intake 12 V DC auxilary sockel (used for external
start etc. See chpt 3:0).
K. Warning light for ignition spark.
L. Thermostat knob.
2:2 Starting the LPG boiler
1. Open the regulator and service tap for the LPG.
2. Turn the thermostat knob to ignition position (see fig 2). The
indicator light for the ignition spark starts flashing.
3. Press the thermostat knob down as far as it will go. Hold
it down for about 15 seconds after the indicator light has
gone out. (The boiler has ignited as soon as the warning
light goes out, but in order for the ignition safety cut-out to
remain open, the thermostat knob must be held down for
the necessary period).
4. Release the thermostat knob.
5. Turn it to operating position and set the desired temperature
(see chpt 2:4).
6. If the indicator light starts flashing immediately after the
C
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