How The Boiler Is Constructed; How The Boiler Works; The Functions Of The Control Panel; 1:1 Technical Data - Alde Comfort 2928 Instructions For Use Manual

Chapter
1.

How the boiler is constructed

1:1 Technical data
2.

How the boiler works

2:1

The functions of the control panel

2:2 Starting the LPG boiler
2:3 Shutting down the LPG boiler
2:4 Setting for maximum comfort
2:5 Setting the room temperature
2:6 Circulation pump
2:7 Electrical heating
3. External start
4. Water heater
5. Maintenance of the heating system
5:1 Bleeding the heating system
6. Useful facts about LPG
7. Troubleshooting
8. Guarantee
Read these instructions carefully before you use the
boiler.
The instructions for use are approved in accordance
with CE no. 048 AO-0007 for LPG boiler type 2928.
Data plate and production number are located inside
the metal shell beside the expansion vessel.
1. HOw THE BOILEr IS
CONCTruCTED
The boiler operates with what is known as constant
temperature, i.e. there is always heated liquid in the
boiler to circulate in the system when the room thermo-
stat calls for heat. In other words there is no time lag
when heat is most needed.
From an air intake on the roof flue terminal, the com-
bustion air is passed through an aluminium hose
into 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 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 con-
nection 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
Page
13
Gas:
13
Power:
13
Gas consumption: Max 420 g/h
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Gas pressure:
14
Liquid volume (glycol water) in boiler: 2.6 l.
14
Liquid volume (glycol water) in immersion heater: 1.0 l.
14
System temperature in the boiler: 35-75
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2. HOw THE BOILEr wOrKS
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When the room thermostat calls for heat, the circula-
14
tion pump starts. The liquid in the system starts circu-
15
lating, and cold water comes into the boiler. The sen-
15
sor on the water jacket senses that the water is colder
15
than the temperature set on the boiler thermostat.
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The main burner ignites and heats up the water that
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circulates round the system. When the heat inside the
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vehicle 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
heater's 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. 240-volt circulation pump on the immersion heater.
F. 12-volt circulation pump on the boiler.
G. Normal position for 12 and 240-volt circulation
pumps. The selected pump starts and stops as
indicated by the room thermostat.
H. Constant position for 12 and 240-volt circulation
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 exam-
ple 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
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.
Propane Butane
5,8 kW 6.7 kW
Max 480 g/h
I 28-30/37 mbar I
3+ 3B/P
C
°
30 mbar
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