Hamworthy Warmwell 60 Installation, Commissioning And Servicing Instructions page 36

Figure 11.7b Diagram of 'Hi' Flow Gas Valve Assembly (Natural Gas Only)
WARMWELL 120 and 140kW Automatic
The 'Flowshare' gas valve assembly is designed to
pass the correct quantity of gas at the nominal inlet
pressure of 20mbar and a maximum inlet pressure
of 25mbar.
Refer to Figure 2.2 to find low fire/start and high fire
gas pressures for the boiler being fired.
Fit a manometer (suitable for 30mbar) onto gas
manifold pressure tapping point.
Light the boiler. Remove protective cap from the Hi/
Lo pressure regulator.
Turn the Hi/Lo valve high fire pressure regulator
(outer nut) clockwise until the pressure stops
increasing. Loosen Throttle locking nut (if fitted) and
rotate the throttle valve adjuster screw until the
manifold pressure is a approx. 0.5mbar greater than
the required high fire gas pressure.
Tighten the locking nut (if fitted) on the throttle
adjuster screw.
Turn the Hi/Lo valve high fire rate adjuster anti-
clockwise to fine trim the high fire pressure.
Refer to Figure 11.6a for procedure on how to adjust
valves for correct low fire/start gas pressures.
NOTE! Honeywell valves shown in diagram.
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HAMWORTHY HEATING LTD WARMWELL 500001091/F