IOM / ROOFTOP BALTIC Series - 0704-E Page 81
HEATING : MODULATING gas burner
PRESSURE ADJUSTMENTS ON HONEYWELL
PRESSURE REGULATING VALVE TYPE VK 4105
Pressure regulator adjustment with 300mbar gas
supply:
- The Burner must run in High Heat mode for this check.
- Place the tube of the "accurate" manometer on the Inlet
pressure port (figure 24) of the Gas Regulating Valve after
having loosened the screw by one turn.
- Check and adjust if necessary the valve Inlet pressure to
20.0 mbar (G20) or 25.0 mbar for Groningue (G25) after
gas burner ignition.
(figure 25)
Fig. 24
High Heat Injection Pressure Checks
- Place the tube of the "accurate" Manometer to the OUT
port on the Gas injector support bar after having loosened
the screw by one turn.
Check and adjust if necessary the valve OUTLET pressure
to 8.4 mbar (G 20) or 12.3mbar for Groningue (G25)
(figure 26).
Fig. 26
Fig. 25
LOW HEAT
ADJUSTMENT
INLET
PRESSURE
HIGH HEAT
ADJUSTMENT
UNDERNEATH
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