Potterton Performa 24i HE Installation And Service Instructions Manual page 35

12.0 CHANGING COMPONENTS
12.15 Pressure Gauge (Figs. 60 & 61)
1. Drain the primary circuit and undo the nut on the
pressure gauge capillary.
2. Remove the timer cover and ease the timer wiring
aside. 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. Reassemble in reverse order.
12.16 Expansion Vessel & Pre-Heat Store
(Fig. 62)
1. To replace the expansion vessel and pre-heat store
it is necessary to remove the boiler from the wall.
2. Drain the system and undo all gas and water
connections. Remove the flue elbow.
3. Lift the boiler off the wall plate and lay it on either
side on a clean flat surface.
4. Undo the unions on pipe 'A' and remove the pipe.
5. Undo the union on pipe 'B' connected to the vessel
and remove the locknut securing the vessel spigot to
the boiler chassis.
6. Undo the screws and remove the appliance upper
cross member. Slide the expansion vessel and
insulation out of the retaining clips.
7. Reassemble in reverse order using new sealing
washers. Fully recommission the appliance and
system.
12.17 Condensate Trap (Fig. 63)
1. Disconnect the two sensing wires from the trap
connections.
2. Squeeze together the wire spring clip to release
and ease the inlet pipe from the trap spigot.
3. Undo the nut securing the condensate drain pipe to
the trap. Disconnect the pipe and sealing washer.
4. From underneath the boiler reomve the screws
securing the trap bracket.
5. Remove the trap and bracket from the boiler. Undo
the locknut securing the trap to the bracket.
6. Reassemble in reverse order.
Publication No. 5111813
Fig. 60
Pressure Gauge
Capillary
Gauge Retaining
Bracket
Pressure Gauge
Fig. 61
Expansion Vessel &
Boiler
Chassis
Vessel Spigots
Lock Nut
Pipe 'B'
Fig. 62
Pipe 'A'
Inlet Pipe
Sensing Wires
Fig. 63
Condensate
Drain Pipe
Timer Cover
Pre-Heat Store
Wire Spring
Clip
Condensate
Trap
Bracket
Retaining Clip
Appliance Upper
Cross Member
35