Initial Preparation; Connecting Diagrams; Filling Information - Baxi 424 Combi 2 Installation And Service Manual

Fig.27 Template
150 mm
5.7

Connecting diagrams

Fig.28 System filling circuit
D
C
A
C
E
B
PN-0000347
5.6.2

Initial preparation

1. After considering the site requirements position the fixing template
on the wall ensuring it is level both horizontally and vertically.
2. Mark the position of the two most suitable fixing slots for the wall
plate.
3. Mark the position of the centre of the flue hole (rear exit). For side
flue exit, mark as shown.
4. If required, mark the position of the gas and water pipes. Remove
the template.
5. Cut the hole for the flue (minimum diameter 116mm).
6. Drill the wall as previously marked to accept the wall plugs supplied.
Secure the wall plate using the fixing screws.
7. Using a spirit level ensure that the plate is level before finally tight-
ening the screws.
5.7.1

Filling information

A Domestic hot water mains inlet
B Central heating return
C
Stop valve
D
Double check valve (Not supplied)
E Loop (Temporary or Permanent)
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.
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
Regu- lations Guide.
for IE: the current edition of I.S. 813 Domestic Gas Installations.
A
Cold mains in
B
Heat return
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.
When the optional permanent filling link is fitted it is not necessary to
remove any part of it after filling or re-pressurising.
5 Before installation
Combi 2 35