Hamworthy STRATTON MK3 Series Installation, Commissioning And Servicing Instructions page 37

4.5.3. Adjusting the gas valve
Throttle/R1
Figure 12 - STRATTON MK3 40 to 60 setting
Figure 13 - STRATTON MK3 70 to 120 setting
Offset/R2
Throttle/R1
Under cap
Figure 14 - VR415 for 150 kW model
06.02.2023
STRATTON MK3 - Installation, Use and Maintenance
- Before starting the burner, on the gas valve,
preset the gas flow rate, using the gas flow rate
adjustment screw Throttle/R1, to the appropriate
value given in the table below.
- Start the burner at maximum power.
- Using a combustion analyser, measure the CO2
Offset/R2
ratio in the exhaust gases: on the gas duct,
remove the plug from the opening and insert the
CO2 measurement sensor into the centre of the
flow in the exhaust duct.
- Check the CO2 value at maximum power Qmax
and, if necessary, adjust the gas flow screw
Throttle/R1 of the valve in order to obtain the CO2
values in the table below.
- Change to minimum power Qmin and check that
the CO2 value is within the range in the table
below. If necessary, use the setting adjustment
screw Offset/R2.
- If the setting is adjusted at minimum power, go
back to maximum power Qmax and recheck the
CO2 value. Repeat the operation until both values
comply with the table below.
- Return to the standard operating mode.
Throttle/R1
After changing the type of gas:
Offset/R2 - Check the sealing of the gas line.
(Under cap)
- Stick the G31 label provided in place of the
original label (G20).
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