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10.3
Gas Valves - Automatic Ignition
The valve used for this range of heaters is the S.I.T. Nova gas valve.
10.3.1
Nova Range Valves
Nova range main valves may be converted to operate with or without a burner gas pressure regulator.
To convert Nova valve from Natural Gas to L.P.G. (see Fig 10.2)
i)
Remove the cover of the pressure regulator.
ii)
Completely unscrew the regulator adjusting screw and remove it complete with its spring.
iii)
Replace the adjusting screw and original cover with the blanking nut attachment.
This device screws fully into the body of the regulator until it stops and puts the regulator out of
action. The step opening feature of the main valve will still operate.
To Convert Nova Valve from L.P.G. to Natural Gas
Reverse the instructions above.
Inlet pressure
rest point
Fig 10.2 Conversion of Nova Family Valve
Blanking screw
For L.P.G.
Burner
pressure
test point
Gas inlet
Pressure regulator
Access cover
Governor spring
assembly
Pilot gas outlet
of valve
Blanked off
230 v electrical
connection
Gas outlet to
burner
Page 62
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