3-4
3
Leisure Home Equipment
3.1.9
Filling the System With Glycol Fluid
▲
For manual filling, unfasten the expansion tank
nut (R) and slowly pour the glycol mixture into the
tank. Bleed the system and top up with more liquid
if the level has fallen after bleeding. Bleed a newly-
filled system regularly during the first days the
heating system is in operation.
3.1.10
Bleeding the System
Depending on how the pipes have been fitted, air pockets may form when the system is filled with
glycol fluid. A sign that there is air trapped in the system is that the heat released into the pipes only
extends a metre or so from the boiler even though the circulation pump is operating. In newly-filled
systems, small air bubbles can form in the expansion tank, creating a murmuring sound. If the circulation
pump is stopped for a few seconds, the bubbles will disappear.
Bleeding:
If a bleeder screw is fitted to the outgoing pipe, open this bleeder screw and leave it open until it starts
to discharge water. If the boiler is fitted with an automatic bleeder, there is no need to bleed it manually.
Start the LPG boiler. The circulation pump should be switched off.
Open the remaining bleeder screws in the system (please refer to the instruction manual of the vehicle
for their locations). Leave the bleeder screws open until they start discharging fluid, and then close
them. Start the circulation pump and let it run for a while. Check that the pipes and radiators around the
vehicle are heating up.
If they still fail to heat up, try the following:
The easiest way to bleed the heating system is to place the vehicle on a sloping surface or to raise one
end of the vehicle using a jack. Bleed the system as described above.
Summary of Contents for Retreat Series
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