7 Gas supply adjustments (Commissioning Part II)
Instructions for installation and servicing aquaPLUS VUI 362-7
26
Fig. 7.3: Setting the maximum heating load (nominal load)
1
10
2
I
0
7.3 Adjusting to the maximum heat load (nominal
load)
• Remove the cap (1).
• Set the DHW temperature control to maximum and
fire the boiler at full rate by fully opening a hot water
tap.
• Turn off the boiler at the main ON/OFF control.
• Press and hold the "+" button, while pressing the
button turn the main ON/OFF control to the "1" ON
position.
• Continue holding "+" button until display alternates
between "P1, P2, P3, P11, P12 and P13". Release "+"
button.
• Press "+" button until "P1" (full gas rate) is shown in
display.
• Press "i" button to operate boiler at full gas rate.
• Using a 10 mm spanner turn nut (2) to adjust the
burner operating pressure.
- Turn the nut (2) clockwise to increase the nominal
load
- Turn the nut (2) anticlockwise to decrease the
nominal load.
• Adjust the burner pressure until it matches the
maximum output as detailed in table 7.7, page 30.
• Now turn the 10 mm nut (2) anticlockwise until the
burner pressure drops by approx. 0.3 - 0.4 mbar.
Nominal load is now correctly adjusted.
• Refit the plastic cap (1).
Warning!
The plastic cap (2)must be fitted for the gas
valve assembly to function correctly.
• Turn off the hot water tap.
• To cancel selected "P1" or "P2" mode press the "i"
and "+" buttons simultaneously.
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