Vaillant ecoMAX 635, Instructions For Installation And Servicing

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Parts replacement 9
Instructions for installation and servicing ecoMAX
Fig. 9.6 Carrying out measurement of CO2 levels, preparing for
air–ratio adjustment
Natural gas:
Adjust in steps of no more than 1/8 of a turn,
and wait for each new value to stabilise (about
one minute).
LPG:
Adjust in small steps of no more than 1/16 of
a turn, and wait for each new value to stabilise
(about one minute).
• Turn anti–clockwise to increase level of CO
2
content.
• Turn clockwise to reduce level of CO
2
content.
• Once the adjustment procedure is complete, swivel the
air suction pipe upwards and back into position.
• Re–check the level of CO
2
content.
• The adjustment procedure may have to be repeated.
• Press the ”+” and ”–” buttons simultaneously to deac-
ti–vate full gas rate mode. Measurement mode is also
cancelled if no control button is operated for 15 minutes.
• Reposition air suction pipe and tighten screw (4).
• Raise control panel.
Adjustment Natural gas (H) Propane Unit
settings Tolerance Tolerance
CO2 after 5 min. 9,0
±
1,0 10,0
±
0,5 Vol.–%
operation at full load
Adjusted for 15 22,5 kWh/m3
Wobbe index Wo
Tab. 9.2 Factory–adjusted gas settings
Fig. 9.7 Carrying out air–ratio adjustment (gas supply settings)
6
5
3
6
4
Tab. 9.1 Values to be programmed in after installation of a new circuit board
Code Meaning Displayed/Adjustable values Circuit board Setting for
setting (default) ecoMAX 635
d.0 Heating system part load Adjustable values in kW 45 kW system-dep.
d.1 Heating system pump over run 1 - 60 min. 5 min. system-dep.
d.2 Heating system max. off-period 1 - 60 min. 20 min. system-dep.
d.14 Pump speed Set value for built-in pump
0 (= auto), 53, 60, 70, 85, 100 % 0 = (auto) system-dep.
d.16 External CH pump 1, 2, 3, or 4 1
d.71 Max. target value for heating-system
flow temperature 40 - 85 °C. 82 °C. system-dep.
d.72 Hot-water pump over run 0 - 250 s 80 s system-dep.
80020014605_00GB_032006 22.02.2006 21:36 Uhr Seite 39