10.3.18 Expansion Vessel; Gas Valve - Baxi EcoBlue System 12 Installation And Service Manual

10 Maintenance
Lock Nut
Expansion
Vessel
Fig. 69
Gas Feed
Pipe
Gas Nozzle Injector

Gas Valve

Electrical
Plug
Washer
Fig. 68
62 EcoBlue System
Washer
Gas Cock

10.3.18 Expansion Vessel

See Section 14 for 32 model procedure.
1. Close the flow and return isolation taps and drain the primary
circuit.
2. Prise off the securing clip and disconnect the braided hose
from the vessel.
3 . Whilst supporting the vessel undo the locknut and manoeuvre
the vessel out of the boiler.
4. Reassemble in reverse order.
10.3.19 Gas Valve (Fig. 69)
After replacing the valve the CO
adjusted as detailed in Section 10.3.20 Setting the Gas
Valve. Only change the valve if a suitable calibrated
combustion analyser is available, operated by a
competent person - see section 10.1.3.
1. Undo the screw and disconnect the electrical plug.
2. Turn the gas cock off and undo the nut on the gas valve inlet
underneath the boiler.
3. Undo the nut on the gas valve outlet. Ease the pipe aside.
NOTE: The gas nozzle injector is inserted in the gas valve outlet.
4. Remove the screws securing the gas valve to the boiler
bottom panel. Remove the valve.
5. Transfer the gas nozzle injector to the new valve, ensuring it
sits in the valve outlet. Examine the sealing washers, replacing if
necessary.
6. Reassemble in reverse order.
Check gas tightness & CO
(12 - 15 - 18 - 24 - 28 models)
must be checked and
2
!
2
7219708 - 01 (04/15)