Glow-worm Energy Saver Combi 2 and Gas Valve - Manual (Page 34)

34 221854B
Diagram 14.4
6567
HEATING RETURN
THERMISTOR
THERMISTOR
CLIP
ELECTRICAL
CONNECTION
(2 OFF)
14.16 Pressure Gauge
Refer to section 12.9 and drain the boiler heating circuit.
Undo the union to the return pipe.
Push the pressure gauge out of the controls fascia while
depressing the retaining lugs behind the fascia, see diagram
14.5.
When replacing the gauge, ensure that the location pin engages
in the slot in the fascia.
Refill, vent and pressurise the boiler.
Check for leaks.
14.17 Expansion Vessel
Refer to section 12.9 and drain the boiler heating circuit
Undo the coupling at the base of the vessel.
While holding the vessel undo the securing bolt on the top panel
of the boiler. Remove the expansion vessel from the boiler
taking care not to lose the securing bolt spacer from the top of
the unit.
Fit the replacement unit ensuring that the securing bolt spacer
is in position and the securing bolt passes through it.
Refill, vent and pressurise the boiler.
Check for leaks.
14.18 Hot Water Cylinder
To remove the hot water cylinder it is necessary to drain down
the boiler heating and hot water circuits.
Refer to section 12.9 and drain the boiler heating circuit.
Refer to section 12.10 and drain the boiler hot water circuit.
The right hand casing panel should be removed as described in
section 12.8.
Remove the expansion vessel as described in section 14.17.
Remove the three way valve as described in section 14.6.
Remove the domestic hot water thermistor as described in
section 14.7.
From above the boiler remove the cylinder automatic air vent,
see diagram 11.1.
Remove the cylinder securing collar, see diagram 11.1.
Remove the automatic air vent non- return valve from the top of
the boiler and temporarily replace the cylinder securing collar.
Undo the pipe connections to the cylinder.
While holding the cylinder in place, remove the cylinder securing
collar on top of the boiler.
Lean the cylinder forwards and lift upwards, disengaging the
location studs at the rear and the cylinder flow pipe connection.
Fit the replacement cylinder ensuring its fitting on the location
studs at the rear of the appliance.
When refitting the automatic air vent non - return valve, a
suitable thread sealant must be used.
Open the isolating valves of both heating and hot water circuits,
refill, vent and pressurise the heating circuit.
Check for leaks.
14 Replacement of Parts