Potterton Performa 24 Installation & Servicing Instructions Manual page 23

Selector Switch
Reset
Burner On
Flame Failure
Power On
Central Heating
Temperature Control
Pressure Test Point
Sealing Screw
Sensing
Tube
Minimum
Pressure
Screw
Fig. 43
Governor Cover Screw
Hot Water
Temperature Control
Gas Valve
Fig. 44
9.2
1. Turn on the gas and electrical supplies to the
boiler and ensure that all external controls are
calling for heat.
2
2. Set the hot water and central heating
bar
temperature controls to maximum and the
selector switch to the OFF position (Fig. 42).
Fig. 42
3. Slacken the pressure test point sealing screw
on the gas valve and connect a pressure gauge
(Fig. 43).
4. Disconnect the sensing tube from the gas
valve.
5. Turn the selector switch fully anticlockwise
against the spring pressure to the reset position
and hold for 2 seconds to reset the boiler.
6. Turn the selector switch to the Cental Heating
and Domestic Hot Water position (
power ON light (
7. Turn on a hot water tap to give a flow rate of at
least 10 l/min.
8. The pressure should be as quoted in Section
4.0 Technical Data. If not, check that the gas
supply pressure is correct (Natural Gas 20mbar,
Butane 30mbar and Propane 37mbar).
9. The burner pressure can be adjusted if
required.
10. Remove the governor cover screw (Fig. 44)
and adjust the pressure regulator screw until the
maximum pressure is achieved.
11. Turn the boiler selector switch to the Off
position and remove the plug from the NTC
Temperature Sensor.
12. Turn the boiler selector switch to the Central
Heating and Domestic Hot Water position (
and reconnect the plug to the NTC. Check and
adjust the minimum pressure screw. This must be
performed within 25 seconds after which the
boiler resumes normal operation.
13. Disconnect the pressure gauge, tighten the
pressure test screw and replace the sensing tube
on the gas valve.
14. Replace the governor cover screw and set the
selector switch to the position required.
9.0 Commissioning the Boiler
Checking the Burner Pressure
) will illuminate (Fig. 42).
). The
)
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