Installation; General; Assembly; Fitting The Pressure Relief Discharge Pipe - Baxi 424 Combi 2 Installation And Service Manual

6

Installation

6.1

General

Fig.30 Mounting the boiler
Fig.31 Connecting the taps
6.2

Assembly

Fig.32 Pressure relief pipe connection
Installation must be carried out in accordance with the prevailing
regulations, codes of practice and the recommendations in this manual.
Danger
If the boiler is installed in a compartment do not use it for storage
purposes. Do not obstruct any purpose provided ventilation
openings.
Caution
Where the boiler is sited in an unheated enclosure provision must
be made to protect against frost, e.g. frost thermostat, pipe
thermostat.
1. Lift the boiler by gripping "a" and "b" and hook the boiler onto the wall
plate.
2. Remove the polystyrene bottom piece by slipping it off downwards.
3. Remove the sealing caps from the boiler connections under the boiler
(including the condensate trap).
c Sealing caps
Warning
Some residual water may escape when removing the sealing
caps. Take precautions to avoid damage to components !
4. Remove the taps, elbow and sealing washers from the fitting kit. The
taps and elbow accept 15mm or 22mm copper pipe as appropriate —
see template.
5. Connect the appropriate tap to the heating flow and return pipework,
gas supply and mains cold inlet.
6. Connect the elbow to the DHW flow outlet.
7. Using the sealing washers provided connect the taps and elbow to the
boiler.
8. Ensure all joints are tight.
Important
Connect the pressure relief discharge pipe first before any
other pipework.
6.2.1

Fitting the pressure relief discharge pipe

1. Remove the discharge pipe from the kit.
2. Determine the routing of the discharge pipe in the vicinity of the boil­
er. Make up as much of the pipework as is practical, including the
discharge pipe supplied.
Important
Make all soldered joints before connecting to the pressure relief
valve. Do not adjust the position of the valve. The discharge pipe
must be installed before pressurising the system.
Important
Route of discharge pipe must be done in a way to avoid any
discolouration of external walls.
3. The pipework must be at least 15mm diameter and run continuously
downwards to a discharge point outside the building.
4. Firmly engage the flange on the pipe into the pressure relief valve
outlet grommet, ensuring it is pushed fully in.
5. Complete the discharge pipework and route it to the outside dis­
charge point.
6. The pipework must be clipped at suitable intervals to support it,
commencing as close to the boiler as possible.
6 Installation
Combi 2
37