Pressure Sensor/Pressure Relief Valve - Potterton Promax HE Store Installation & Servicing Instructions Manual

Isolating Valve
Gas Cock
Fig. 19
40
Open
Promax Store
Closed
Isolating
Valve
RWC
Pull out Clip to
By-pass
release Pressure
Valve
Relief Valve
Remove Cross/Pressure
Relief Valve Assembly
(By-pass Valve part of assy.)
4.4 Pressure Sensor/PRV
Re-assemble all parts in reverse order.
1. Perform 4.1 General Access.
2. Isolate three valves as shown and open
the cap on the auto air vent.
3. Release pressure by opening the
pressure relief valve.
4. Primary Pressure Switch
Disconnect the electrical connector and
unscrew the switch.
4. Pressure Relief Valve (PRV)
Release union nut below the sensor
body, remove securing clip and pull valve
out from assembly.
4. By-pass Valve
This valve is part of the complete cross
unit and cannot be replaced separately.
Remove the pressure relief valve as
shown above then release the "Techtite"
Pressure
unions and remove the cross unit.
Relief Valve
Open
Pressure
Relief Valve
Pressure
Relief Valve
© Baxi Heating UK Ltd 2012