Baxi Solo 3 30 PF System Installation And Servicing Instructions page 43

11.0 Changing Components - Page 43
11.16 Pressure Gauge
1. Isolate the appliance from the water system by closing
the flow and return taps.
2. Drain the boiler of water.
3. Undo the ¼ turn screws and drop the facia panel down.
4. Undo the nut on the gauge capillary at the boiler flow
connection (Fig. 131).
5. Press in the two lugs on the gauge body, and pass the
gauge and capillary through the facia (Fig. 130).
6. Fit the new gauge in reverse order and recommission the
appliance.
11.17 Pressure Relief Valve (Fig. 129)
1. Isolate the appliance from the water system by dosing the
flow and return taps.
2. Drain the boiler of water.
3. Undo the ¼ turn screws and drop the facia panel down.
4. Undo the nut on the pressure relief pipe and slacken the
screw holding the valve to the manifold.
5. Fit the new valve in reverse order and recommission the
appliance.
11.18 Re-pressurising Expansion Vessel
1. The charge pressure is 1.0 bar.
2. Close the central heating flow and return isolating valves.
3. Drain the boiler of water.
4. The expansion vessel valve is situated to the right of the
combustion box, below the expansion vessel.
5. Pressurise to 1 .0 bar.
6. Open the isolating valves and recharge the system to 1.0
bar.
7. Vent the system as necessary.