40
© Baxi Heating UK Ltd 2012
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”
unions and remove the
#
cross
$
unit.
RWC
MAX0002D
Promax Store
Pull
out
Clip
to
release
Pressure
Relief
Valve
Pressure
Relief
Valve
Remove
Cross/Pressure
Relief
Valve
Assembl
y
(
B
y-
pass
Valve
part
of
ass
y.)
B
y-
pass
Valve
MAX0016C
I
solating
Valve
Closed
Open
Open
Pressure
Relief
Valve
Pressure
Relief
Valve
Gas
Coc
k
I
solating
Valve
Fig. 19