6.5 Filling the installation
6.6 Draining the installation
Fig.43 Draining the installation
6 Installation
6.5.1
Flushing the system
Flush thoroughly and treat the system according to guidance given in BS
7593.
6.5.2
Fill the installation
A filling point connection on the central heating return pipework must be
provided to facilitate initial filling and pressurising and also any subsequent
water loss replacement/refilling.
1.
Fill the installation using approved equipment and in accordance
with all relevant water supply regulations.
Important
Your attention is drawn to:
for GB: Guidance G24.2 and recommendation R24.2 of the Wa
ter Regulations Guide.
for IE: the current edition of I.S. 813 "Domestic Gas Installa
tions" .
2. The sealed primary circuits may be filled or replenished by means of
a temporary connection between the circuit and a supply pipe, provi
ded a ‘Listed’ double check valve or some other no less effective
backflow prevention device is permanently connected at the inlet to
the circuit and the temporary connection is removed after use.
3. Fill or replenish the sealed primary circuits by means of a temporary
connection between the circuit and a supply pipe:
Permanently connect a ‘Listed’ double check valve or some other
no less effective backflow prevention device at the inlet to the cir
cuit.
Remove the temporary connection after use except if where a per
manent connection is used.
6.5.3 Filling the condensate trap
1. Check that the boiler condensate trap has been primed before com
missioning the boiler.
Fig.42 Filling the installation
'UDLQ
44 600 Combi 2
There is also a drain point fitted on the central heating flow isolation cock.
The boiler can be drained via the pressure relief valve. Check routing
is suitable for draining primary system water
1. Remove the front panel and lower the controls.
2. Slowly open the drain anti-clockwise by hand. Do not use tools.
3. Close the drain by turning clockwise. Do not over tighten.
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