Swift Tourer Owner's Handbook Manual page 111

corrosion, for example, will deteriorate. The
glycol content should be checked before
topping up with new liquid. This will ensure
that the concentration of glycol in the mixture
is not too high.
If the fluid level in the expansion tank falls for
reasons other than evaporation, please check
all joints, drain cocks and bleeder screws to
ensure that they are not leaking. If the glycol-
water mixture leaks out, rinse with water and
wipe up.
Never allow the heating system to stand empty
of glycol.
FILLING THE SYSTEM WITH
GLYCOL FLUID
NB! Any vessels used to carry the fluid must
be spotlessly clean and the pipes in the
system must be free of contamination. This will
prevent the growth of bacteria in the system.
The system is filled through the expansion
tank, either manually or using the Alde filling
pump which both tops up and bleeds the
system. For manual filling, unfasten the
circulation pump nut (R) and lift the pump (S)
out of the tank. Slowly pour the glycol mixture
into the tank. Bleed the system.
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.
- MAX
- MIN
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 there are still issues, try the following:
Single-axle caravan:
Stop the circulation pump. Lower the front
of the caravan as far as possible. Leave it in
S
this position for a few minutes to allow the
air to travel upwards in the system. Open the
bleeder screw at the highest point. Leave it
R
open until it discharges glycol fluid. Raise the
front of the caravan as far as possible and
repeat the procedure in this position.
Then position the caravan horizontally and
start the circulation pump. Check that the
pipes and radiators around the vehicle are
heating up.
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