Adjusting To The Maximum Heat Load (Nominal Load); Adjusting The Ignition Rate; Thermocompact 637E Only) - Vaillant 824/2 E Instructions For Installation Manual

7.4 Adjusting to the maximum heat load
(nominal load)
• Undo screw and remove the cap (1)
turboMAX only:
• Set the DHW temperature control to maximum and
fire the boiler at full rate by fully opening a hot water
tap.
thermoCOMPACT only:
• 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" and "P2". 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.
• 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).
Attention!
The plastic cap (2) must be fitted for the gas
valve assembly to function correctly.
turboMAX only:
• Turn off the hot water tap.
thermoCOMPACT only:
• To cancel selected "P1" or "P2" mode press the "i" and
"+" buttons simultaneously.
1
Fig. 7.4: Adjusting the ignition rate
Instructions for Installation and Servicing turboMAX plus and thermoCOMPACT R1
Supplied By www.heating spares.co Tel. 0161 620 6677
Gas supply adjustments (Commissioning Part II) 7
2

7.5 Adjusting the ignition rate

• Undo screw and remove the cap (1).
turcoMAX only:
• 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.
thermoCOMPACT only:
• 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" and "P2". 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 matsches the
ignition rate as detailed on page 31 or 32.
turboMAX only:
• Turn off the hot water tap and reconnect the wires to
the modulating regulator.
thermoCOMPACT only:
• To cancel selected "P1" or "P2" mode press the "i" and
"+" buttons simultaneously.
Note!
If installing/commissioning a turboMAX plus
837 or a thermoCOMPACT 637 boiler go to page
30.
Attention!
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.
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