Lennox FLEXY II Series Installation, Operating And Maintenance page 54

HEATING : GAS BURNER 180 & 240kW
PRESSURE ADJUSTMENTS
PRESSURE REGULATING VALVE TYPE VR 4605P
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 19) of the Gas Regulating Valve after
hav ing loosened the screw by one turn
Check and adjust if necessary the valv e Inlet pressure to
20.0mbar (G20) or 25.0mbar f or Groningen (G25) or
37.0mbar for propane (G31) after gas burner ignition
(f ig.20)
IOM – FLEXY II – 1007 – E
ON HONEYWELL
Inlet pressure
measuring port
Fig. 19
Fig.20
High Heat Injection Pressure Checks
Check and adjust if necessary the valv e OUTLET pressure
to 8.0mbar (G 20) / 10.4mbar f or Groningen (G25) & 28.3
mbar f or propane (G31) (f ig.21)
The out pressure must be measured on the pressure tap
located on the gas injector support bar to avoid the
pressure drop due to the elbow after the v alve
Fig. 21
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