Baxi Megaflo System 15 HE Installation And Servicing Instructions page 42

Gauge Retaining
Bracket
Fig. 81
Fig. 82
'O' Ring
Seal
Fig. 83
42
© Baxi Heating UK Ltd 2007
Pressure Gauge
Pressure Gauge
Capillary
Grub Screw
Discharge Pipe
14.0 Changing Components
14.16 Pressure Gauge (Figs. 81 & 82)
1. Drain the primary circuit and undo the nut on the
pressure gauge capillary.
2. Undo the screws securing the gauge retaining bracket.
3. Remove the bracket and gauge assembly. Depress the
barbs on the side of the gauge and remove the retaining
bracket.
4. Examine the sealing washer, replace if necessary.
5. Reassemble in reverse order.
14.17 Pressure Relief Valve (Fig. 83)
1. Drain the primary circuit.
2. Disconnect the discharge pipe from the valve. Using a
suitable hexagon key undo the grub screw sufficiently to
release the valve.
3. Note the orientation of the valve, rotate it and withdraw
it from the manifold.
4. Fit the new valve and 'O' ring seal and set to the
previously noted orientation. Reassemble in reverse order.