Baxi Platinum 2 Combi 28 GA Installation & Servicing Instructions Manual page 44

Venturi Inlet
Pipe
Washer
Gas Valve
Plug
Nut
Washer
Gas Cock
Fig. 69
Fig. 70
44
© Baxi Heating UK Ltd 2011
Plug
Control Box removed
for clarity
Lock Nut
Expansion Vessel
Support Bracket
15.0 Changing Components
15.22 Gas Valve (Fig. 69)
IMPORTANT: After replacing the valve the CO
checked as detailed in Section 16.0 Combustion. Only
change the valve if a suitable calibrated combustion
analyser is available, operated by a competent person -
see section 14.1.
1. Turn the gas cock off and undo the nut under the boiler.
Retain the washer.
2. Remove the electrical plugs from the valve.
3. Undo the nut on the venturi inlet pipe and ease the pipe
aside, retaining the washer.
4. Remove the nut securing the gas valve to the boiler bottom
panel.
5. Reassemble in reverse order, ensuring the washers are in
place, and check the combustion (Sections 16.0).
NOTE: Check for gas tightness after replacing gas valve.
15.23 Expansion Vessel (Fig. 70)
1. Close the flow and return isolation taps and drain the
primary circuit.
2. Undo the nut on the pipe connection at the bottom of the
vessel, and slacken the nut on the hydraulic inlet assembly.
3. Remove the screws securing the support bracket, and
withdraw the bracket.
4. Whilst supporting the vessel undo and remove the locknut
securing the vessel spigot to the boiler top panel.
5. Manoeuvre the vessel out of the boiler.
6. Reassemble in reverse order.
must be
2