Alde Comfort 2928 Руководство по эксплуатации - Страница 10
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The connection should be made in accordance with fig
10.
240 volts (immersion heater only)
The immersion heater must always be connected to
a 240-volt earthed socket. Permanent installation of a
240-volt wallsocket must be made. Keep cables clear
of immersion heater body.
WArnInG: 240 volts must be well shielded from 12
volts.
Fig 10
A.
Terminal block
B.
Cut-out 1 amp fuse
C.
Room thermostat
D.
Battery 12 volts
E.
The boiler from above
3.
FITTInG THE HEATInG SySTEM
In order to obtain the best effect from the heating sys-
tem, the radiators should be fitted along the outer walls
and under the windows. In order to obtain good air
circulation (fig 11) and correct heat emission, fresh air
should be able to pass between bed bases, floor and
back cushions and outer walls (see fig 12). It is there-
fore extremely important that air gains free access to
the radiators, as these are to supply the majority of the
heat to be distributed inside the vehicle. If no holes are
made for air gaps as per fig 13, the radiators will not be
able to emit sufficient heat, which will lead to a sharp
fall in temperature at windows and outer walls, leading
to condensation.
Installation should be carried out using Ø 22 mm pipe
and any type of radiator. Radiators constructed of
copper piping are most efficient. Every metre of radia-
tor has a heat emission of about 400 watts. Pipes and
radiators must not be placed higher than the bottom
of the boiler's expansion vessel. The boiler must be
raised on a plinth if there are upper alcoves, se fig 12.
How many metre's of radiator are required in the
vehicle?
The most important thing is to have a radiator under
each window that is slightly longer than the window.
A useful guide is the length of the living area x 1.5 =
the number of metres of radiators, but the greater the
length of radiator, the better and more even the heat
distribution. This allows a lower system temperature in
the boiler for the same heat emission. This saves gas
and provides a more pleasant heat. The pipes should
be run horizontally and air screws should be located at
suitable places where air cannot escape by itself, e.g.
if the pipe is run over the wheel housing. If the vehicle
has a sleeping alcove above the driver's cab, it is very
important to locate an air screw at the highest point
(see fig 12 E). All curves should be as gentle as pos-
sible, otherwise circulation is obstructed.
Make sure that radiators and pipes are properly at-
tached with brackets. As a connection between ra-
diators and pipes, short rubber connections made of
10
special rubber should be used. The rubber connections
should be secured with wire clips. A sealant between
the rubber connections, Permatex Form-a-Gasket no.
3 should be used. A draining valve should be fitted to
the lowest point of the pipe (see fig 12 F).
nB. Aluminium and copper must not be mixed in the
heating system, because the copper corrodes the
aluminium. It is even very important not to use the
same equipment for cutting and handling copper and
aluminium. If a copper shaving, for example, gets into
an aluminium pipe, it will almost certainly give rise to a
hole in the pipe.
Fig 11
A.
Air flow
B.
Radiators
Fig 12
A.
Circulation flow
B.
Circulation return
C.
Ventilation duct
D.
Radiator
E.
Air nipple
F.
Drain cock
G.
Room thermostat
3:1
Connection to the heating system
The LPG boiler's connections to the heating system
are located on the rear of the boiler. Use the same
rubber connections, clips and sealant as for the rest of
the system.
LPG boiler with water heater type 2959 and immersion
heater should be fitted in accordance with fig 14.
Fig 14
A.
Flow radiator water
B.
Return radiator water
3:2
Filling the heating system
The heating system must be filled with a liquid mixture
consisting of 60% water and 40% glycol. Use high
quality glycol that is designed for heating systems and
contains inhibitors. If the heating system is exposed to
temperatures lower than -25 °C, the glycol percentage
is to be increased, but it should not exceed 50%.
Vessels used to handle the liquid must be absolutely
clean, and the pipes in the heating system must be
free from contamination. This is necessary to prevent
the growth of bacteria in the system. Filling is carried
out through the expansion tank, either manually or
with the aid of Alde's filling pump. This pump both fills
and bleeds the system. If the system is filled manually,
slowly pour the liquid until the level is approximately
1 cm over the MIN-line in the tank. Bleed the system.
Refill if the level has fallen during bleeding. A newly
filled heating system should be bled at regular intervals
during the first few days of operation.