Gas supply adjustments (Commissioning Part II) 7
Instructions for installation and servicing aquaPLUS VUI 362-7
27
7.4 Adjusting the ignition rate
• Undo screw and remove the cap (1).
• Disconnect the modulating coil wires from the gas
valve, 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 "P2" (ignition rate) is shown in
display.
• Press "i" button to operate boiler at full gas rate.
• Use a suitably sized screwdriver to turn the inner
screw (2).
-Turn the screw (2) clockwise to increase the ignation
rate
- Turn the screw (2) anticlockwise to decrease the
ignation rate
• Adjust the burner pressure until it matches the
ignition rate in table 7.7, page 30.
• Turn off the hot water tap and reconnect the wires to
the modulating regulator.
• To cancel selected "P1" or "P2" mode press the "i" and
"+" buttons simultaneously.
Warning!
The main burner pressure must be rechecked
after adjusting the ignition rate.
Refit cap (1) and replace screw. Re-check ignition and
main burner pressures. After completion of these tests
tighten the sealing screw and check all joints and test
points for soundness.
Fig. 7.4: Adjusting the ignition gas quantity
2
1
I
0
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