7. Using a spirit level ensure that the wall bracket is level before finally
tightening the screws
8. Lift the boiler by gripping "a" and "b" and hook the boiler onto the wall
bracket (9).
9. Remove the polystyrene by slipping it off downwards (10).
10. Remove the sealing caps from the pipes underneath the boiler
Warning
Some residual water may escape when removing the sealing
caps. Take precautions to avoid damage to components!
.
5.6
Connecting diagrams
5.6.1
Filling information
A
Domestic hot water mains inlet
B
Central heating return
C
Stop valve
D
Double check valve
E
Temporary loop
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.
A
Filling loop
B
Flow and return taps
A filling loop is supplied with the 424 and 428 models.
The filling method adopted must be in accordance with all relevant water
supply regulations and use approved equipment.
Your attention is drawn to:
for GB: Guidance G24.2 and recommendation R24.2 of the Water
Regulations Guide.
for IE: the current edition of I.S. 813 Domestic Gas Installations.
The sealed primary circuits may be filled or replenished by means of a
temporary connection between the circuit and a supply pipe, provided 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.
Fig.28
Mounting the boiler
10
9
b
a
PN-0000515
Fig.29
System filling circuit
PN-0000347
A
B
C
C
D
E
Fig.30
Filling loop
PN-0000517
A
B
5 Before installation
38
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