Fig. 61
Pressure Gauge
Capillary
Gauge Retaining
Bracket
12.0CHANGING COMPONENTS
12.14Pressure Gauge (Figs. 61 & 62)
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.
Timer Cover
Pressure Gauge
Fig. 62
Expansion Vessel
Retaining Clip
Upper Cross
Member
Fig. 63 |
| |
| Vessel Outlet | |
Boiler | Spigot | |
| ||
Chassis |
| |
Lock Nut | Spring | |
Washer | ||
| ||
Sensing Wires | Inlet Pipe | |
| ||
| Wire Spring | |
| Clip |
Condensate
Trap
Bracket
Fig. 64
Condensate
Drain Pipe
12.15Expansion Vessel (Fig. 63)
1.To replace the expansion vessel it is necessary to remove the boiler from the wall.
NOTE: Alternatively a vessel of equivalent capacity can be fitted on the system return pipe as close as possible to the boiler.
2.Drain the system and undo all gas, water and condensate drain connections. Remove the flue elbow.
3.Lift the boiler off the wall bracket and lay it on it’s side on a clean flat surface.
4.Undo the nut on the vessel outlet spigot, and remove the locknut and spring washer securing the spigot to the boiler chassis.
5.Undo the screws and remove the appliance upper cross member. Slide the expansion vessel out of the retaining clips.
6.Reassemble in reverse order. Fully recommission the appliance and system.
12.16Condensate Trap (Fig. 64)
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 remove 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.
34 | Publication No. 5111811 |
