Service manual
G.Fire Service Manual 21 Issue A — © Masport, March 2004
3.1.3 ECS II MODELS. These also have a pressure regulator in the control valve. The outlet pressure
test point is on the top of the control valve and is the one furthest from the gas inlet connection.
There are two pressure settings to adjust, high and turndown.
1.
Access to the adjuster
s is gained by first
removing the heat shield above the valve and
then removing the protective transparent cap at
the top of the control
valve modulating coil.
This will expose the central screw (turndown
pressure adjuster) and a 10mm hexagonal nut
surrounding it (
high pressure adjuster). Note
that the modulating coil may be rotated
through 90° if necessary to provide easier
access for pressure adjustments. Before
adjusting the high pressure, the fire must be
alight and burning at the ‘HIGH’ setting.
2.
Se
t the high pressure first to the figure in the
Table. Adjust, if necessary, by rotating the
10mm nut, screwing down to increase the
pressure.
3. To set the turndown pressure, select the lowest heat setting on the remote control. Adjust the
turndown pressure to the figure in the Table by rotating the central Phillips head screw, taking care
not to shift the position of the already adjusted 10mm hex. nut. Screw down to increase the
pressure. Be careful to use the correct screwdriver when making this adjustment as the head of the
turndown pressure adjusting screw is easily damaged. Before finishing the job, move the
screwdriver clear of the adjuster and verify that the pressure is still correct. Sometimes the
proximity of a steel screwdriver can upset the turndown pressure setting.
4. Replace the protective plastic cap above the adjusters, and re-fit the heat shield above the valve.
3.2 GAS PRESSURE ADJUSTMENT – PICCOLO, SOFIA and MADRID
All pressure adjustments must be made while the heater is operating.
Access for pressure adjusting is gained by removing the lower louvre assembly.
GAS PRESSURES PICCOLO SOFIA MADRID
kPa
NG ULPG PROP NG ULPG PROP NG ULPG PROP
High Pressure 0.75 2.1 2.1 0.82 2.3 2.3 0.82 2.3 2.3
Turndown Pressure 0.30 0.9 0.9 0.35 1.0 1.0 0.35 1.0 1.0
3.2.1 PICCOLO MODELS. The injector pressure is controlled by a separate regulator. Follow the
instructions in 3.1.1 to make the adjustments, setting the pressures to the values shown in the table
above. (In this case, the adjusting screw is under the regulator).
3.2.2 SOFIA and MADRID (EIS) MODELS . The pressure regulator for these models is built into the
gas valve. As the valve is mounted on its side, the ‘top’ of the valve is facing directly forward from
under the burner tray.
1. Remove the protective transparent cap on the control valve modulating coil. (See illustration in
3.1.3.1). This will expose the central screw (turndown pressure adjuster) and a 10mm hexagonal
nut surrounding it (high pressure adjuster). Note that the modulating coil may be rotated through
90° if necessary to provide easier access for pressure adjustments. Before adjusting the high
pressure, the fire must be alight and burning at the ‘HIGH’ setting.
2. Set the high pressure first to the figure in the Table. Adjust, if necessary, by rotating the 10mm nut,
screwing in to increase the pressure.