The Lpg System; The Heating System; Filling The System With Glycol Fluid; Bleeding The System - Bailey Approach Owner's Manual

The LPG System

The LPG system should be checked regularly
by a professional, who will ensure that there
are no leaks from connections or hoses. LPG
hoses should be changed according to national
regulations, maximum of five years. Check the
date stamp on the hose. Hose has a propensity
to dry out and crack. To increase safety, we
recommend fitting an Alde leak gauge, type
4071, as close as possible to the pressure
reduction valve.

The Heating System

Regularly check the heating systems' fluid
level in the expansion tank. The level should
be about 1cm above the minimum indicator
in a cold tank. The heating system should be
filled with a mixture of water and glycol. For
preference, use high quality ready mixed glycol
(with inhibitor) intended for use in aluminium
heating systems. If using concentrated glycol,
the mixture should consist of 60% water and
40% glycol. If the heating system will be
exposed to temperatures below -25°, the glycol
content must be increased, but not more than
50%. Any vessels used for the liquid must be
spotlessly clean, and the pipes in the heating
system. The glycol mixture should be changed
every second year, since its ability to protect
against 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 out. Never allow the heating
system to stand empty of glycol.

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.

Bleeding the System

Depending on how the pipes have been fitted,
air pockets may form when the system is filled
only with glycol fluid. A sign that here 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 after a few seconds, the
bubbles will disappear.
FITTED EQUIPMENT- The Alde Heating System
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