6.5
Filling the installation
6.6
Draining the installation
The drain cock is inside the boiler (in the lower left-hand section). To
access the cock and drain it, proceed as follows:
1. Remove the front panel from the boiler and turn the control panel
downwards, as shown in the adjacent figure.
2. Slowly open the cock (E) anti-clockwise to drain the boiler and the
system. Do not use tools.
3. Close the cock by turning it clockwise, without using excessive force.
Fig.4
5
Draining the installation
E
BO-7746442-3
6 Installation
42
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.4
4
Filling the installation
BO-7742388
BO-7769517
Combi 2
