Alde Comfort 2923, Руководство по обслуживанию, Страница: 5 / 28

Boiler layout (fig 9) :
At the bottom of the LPG burner 2923 there is an inlet pipe
which feeds in air from outside to the combustion chamber
(fig 7). On the LPG boiler 2928, the air is led from the top
of the flue via a hose down to the combustion chamber
(fig 8). The LPG automatic unit and burner are attached to
a removable plate screwed into the combustion chamber
in the lower section of the boiler. The water jacket is fitted
above the combustion chamber, and consists of an inner
and outer pipe. The gap between these pipes provides
the water reservoir. Inside the inner pipe there is a flame-
damper, which consists of a folded stainless plate. This is
intended to direct the warm combustion gases coming from
the burner out towards the water jacket to heat the water.
A pipe leads from the upper part of the water jacket to the
expansion chamber. Inside the expansion chamber there
is a 12 volt pump which circulates the heated liquid in the
system. A control unit with thermostat knob, fuse, current
inlet and change-over switch is located below the expan-
sion chamber.
At the highest point of the boiler, there is an exhaust pipe
for connecting to the flue, as well as a connection block for
electrical connections to the boiler.
A ventilation drum is fitted alongside the boiler, and this
takes in fresh air from outside and directs it on into the
boiler. The fresh air is warmed up by radiant heat from the
boiler casing, and is then passed out into the caravan via
the ventilation grill in the front plate.
How the boiler works:
When the room thermostat demands heat, the circula -
tion pump starts. The liquid in the system then begins to
circulate, and cold water enters the boiler. A sensor fitted
in the water jacket senses that the water is colder than the
temperature set on the boiler thermostat. The pilot light
ignites the main burner, which heats up the liquid and circu
-
lates it round the system. When the warmth in the caravan
reaches the temperature set on the room thermostat, the
circulation pump stops. A sensor on the boiler senses
when the liquid has reached the temperature set on the
boiler thermostat. It then closes down the main burner, and
returns to the pilot light. When later the liquid temperature
has fallen a few degrees in the boiler, the main burner is
ignited again. This ensures that warm water is always avail
-
able when the room thermostat demands heat
Fig 7.
Height: ..................................................... 1710 mm
Width: ...................................................... 132 mm
Depth: ...................................................... 220 mm
Weight 2923 complete: ............................ 18 kg
Weight 2928 complete: ............................ 19 kg
Output propane: ....................................... 5,4 kW
Output butane: ......................................... 6,2 kW
Gas pressure: .......................................... 30 mbar(3 kPa)
Gas consumption propane: ..................... max 420 g/h
Gas consumption butane: ........................ max 480 g/h
Volume of liquid: ...................................... 2,6 litre
System temperature: ...............................
35 - 75 °C
:1 tEChnICAl DAtA
Fuse: ........................................................ 1 amp
Current consumption 12 V circ. pump: .... 150 - 200 mA
Connection pipes heating system:........... Ø 22 mm
Minimum installation dimensions for 2923:
Height: ..................................................... 1820 mm
Width: ...................................................... 132 mm
Depth: ...................................................... 310 mm
Minimum installation dimensions for 2923 :
Height: ..................................................... 1850 mm
Width: ...................................................... 132 mm
Depth: ...................................................... 350 mm
Flue
Circulation pump
Level marks for
glycol liquid
Expansion vessel
Hatch
Control panel
Boiler thermostat
Burner
Ventilation duct
Window
Inlet funnel
Burner
Burner
Combustion
air in
Fig 8.
Flame damper
Water jacket
Overheating
protection
Combustion
air in
Exhaust
gases
Fig 9 (Comfort 2923).
3:0 ABout CoMFoRt LPG BoILeRs 2923 & 2928
Exhaust
gases