Specifications

33Instructions for installation and servicing ecoTEC
5.11 Adjusting the central heating output (range
rating)
The boilers are fully modulating for central heating, and
it is therefore not necessary to range rate the boiler.
However, if desired, it is possible to range rate the boiler,
as follows:
• Press the “i” and “+” buttons simultaneously.
• Keep the “+” button pressed until “d.0” is displayed.
Note
The display runs from “d.0” to “d.99” before
restarting at “d.0”.
• Press the “i” button. The “=” symbol is displayed. The
part load setting is now displayed in kW.
• Use the “+” and “–” buttons to increase or decrease
the value in steps of 1 kW. The displayed value will
flash while the adjustment procedure is being carried
out. The available ranges of settings are given in Table
5.2.
• Push the “i” button for about five seconds, or until the
display stops flashing. The value is now saved to mem-
ory. The display will now return to its normal state
(current heating system flow temperature, e.g. 45 °C).
• Press the “i” and “+” buttons simultaneously to cancel
adjustment mode.
Adjustment mode is also cancelled if no button is
operated for a period of 4 minutes.
Appliance Heating output in kW
ecoTEC plus 612 5 – 12
ecoTEC plus 615 5 – 15
ecoTEC plus 618 7 – 18
ecoTEC plus 624 9 – 24
ecoTEC plus 630 10 – 30
ecoTEC plus 637 12 – 37
ecoTEC plus 824 7 – 19
ecoTEC plus 831 9 – 24
ecoTEC plus 837 12 – 28
ecoTEC pro 28 9 – 24
Table 5.2 Heating system part load adjustment ranges
5.12 Gas changeover
Note
To reset the appliance from natural gas to LPG
mode, you need the Vaillant conversion kit Art.
No. 00 2001 0641.
To reset the appliance from LPG to natural gas
mode, you need the Vaillant conversion kit Art.
No. 00 2001 0642.
Convert the appliance as described in the con-
version kit.
6 Functional checks (commissioning
part II)
6.1 Functional checks
6.1.1 Procedure
After installing and checking the gas supply pressure,
perform a function check before commissioning the
appliance and handing over to the user.
• Commission the appliance according to the relevant
operating manual.
• Check the gas supply pipe, exhaust system, heating
system and the hot water lines (combination boilers
only) for leaks.
• Check that the flue system has been installed properly
according to the flue system assembly manual.
• Check for ignition and an even flame on the burner.
• Perform a function check on the heating system (see
section 6.1.2) and the water heating (combination boil-
ers only, see section 6.1.3).
• Hand over the appliance to the user (see section 6.2).
Fig. 6.1 Function check
Commissioning Part I 5
Functional checks (commissioning part II) 6