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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

Terminal block

Cut-out 1 amp fuse

Room thermostat

Battery 12 volts

The boiler from above

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

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

Air flow

Radiators

Fig 12

Circulation flow

Circulation return

Ventilation duct

Radiator

Air nipple

Drain cock

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

Flow radiator water

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.