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To access the pilot adjustment
screw on non-CE valves, this cap
must be removed.
Pilot Adjustment Screw
Honeywell Valve
(Non-CE Units)
Honeywell Valve
(CE Units)
Gas Valve Regulator
Adjustment Screw
Locating the gas valve regulator adjustment screw and pilot adjustment screw.
35-Series Non-CE Standard
Burner Manifold Gas Pressures
Gas Pressure
Natural
4.0” W.C.
0.87 kPa
Propane
9.0” W.C.
2.24 kPa
35-Series CE Standard
Burner Manifold Gas Pressures
Gas Pressure
Natural Gas Lacq
(G20) under 20 mbar
9 mbar
Natural Gas Gronigue*
(G25) under 25 mbar
11 mbar
Natural Gas Gronigue*
(G20) under 20 mbar
11 mbar
Propane
(G31) under 37 or 50 mbar
22.5 mbar
* Belgian G25 and G20 = 9.0 mbar
45-Series Non-CE Standard
Burner Manifold Gas Pressures
Gas Pressure
Natural
3.5” W.C.
0.73 kPa
Propane
8.25” W.C.
2.05 kPa
45-Series CE Standard
Burner Manifold Gas Pressures
Gas Pressure
Natural Gas Lacq
(G20) under 20 mbar
7.5 mbar
Natural Gas Gronigue*
(G25) under 25 mbar
10 mbar
Natural Gas Gronigue
(G20) under 20 mbar
10 mbar
Propane
(G31) under 37 or 50 mbar
20.6 mbar
* Belgian G25 = 7.0 mbar
8. Use a at-head screwdriver to adjust the gas valve regulator adjustment screw to obtain the prescribed
pressure written on the rating plate or one of the charts above. (Use the diagram on below to locate
this screw.) Turn the screw clockwise to increase gas pressure and counterclockwise to decrease gas
pressure.
9. On non-CE units, reinstall the gas valve regulator cap screw when the correct manifold pressure is
obtained.
10. Place the gas valve in the OFF position. Remove the tting from the pressure tap hole and reinstall the
pressure tap plug.
11. Place the gas valve in the PILOT position. Re-light and check for any gas leaks.
12. Place the gas valve in the OFF position.