Installation; General; Assembly; Fitting The Pressure Relief Discharge Pipe - Baxi COMBI 224 Installation And Service Manual

6 Installation

6 Installation
6.1

General

6.2

Assembly

Fig.33 Pressure relief pipe connection
40
Installation must be carried out in accordance with the prevailing regula­
tions, 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 open­
ings.
Note
Where the boiler is sited in an unheated enclosure provision must
be made to protect against frost, e.g. frost thermostat, pipe ther­
mostat.
Note
If the boiler stand-off kit has been used the copper tails are rever­
sible and can be used here.
Ensure the sealing caps are removed from the boiler connections under
the boiler (including the condensate trap).
Note
A small amount of water may drain from the boiler once the caps
are removed.
Remove the taps, elbow and sealing washers from the fitting kit.
Connect the appropriate tap to the heating flow and return pipework, gas
supply and mains cold inlet. The elbow must be connected to the DHW
flow pipe.
Using the sealing washers provided connect the taps and elbow to the
boiler.
Ensure all joints are tight.

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.
Note
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.
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 PRV outlet grommet,
ensuring it is pushed fully in.
5. Complete the discharge pipework and route it to the outside dis­
charge point.
PN-0000283
6. The pipework must be clipped at suitable intervals to support it, com­
mencing as close to the boiler as possible.

6.2.2 Connecting the condensate drain

1. Remove the blanking cap, and using the straight rubber coupling
supplied, connect the condensate drain pipework to the boiler con­
densate trap outlet pipe.
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