37
Installation and maintenance manual ecoTEC
• Finally, keep the “
i
” button pressed for about five sec-
onds, or until the display stops flashing. The value is
now saved to memory. The display will now return to
its normal state (current heating system flow tempera-
ture, 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
4.9 – 12.0
ecoTEC plus 615
4.9 – 15.0
ecoTEC plus 618
6.7 – 18.0
ecoTEC plus 624
8.0 – 24.0
ecoTEC plus 630
10.0 – 30.0
ecoTEC plus 823
6.0 – 18.0
ecoTEC plus 831
8.7 – 24.0
ecoTEC pro 828
9.0 – 24.0
Table 5.2 Heating system part load adjustment ranges
5.12 Gas
changeover
Note
To reset the appliance from natural gas to pro-
pane mode, you need the Vaillant changeover
set Art. No. xxx xxx.
To reset the appliance from propane gas to nat-
ural gas mode, you need the Vaillant changeo-
ver set Art. No. yyy yyy.
Reset the appliance as described in the change-
over set.
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 (only in 800 series
appliances) 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 (only in 800
series appliances, see Section 6.1.3).
• Hand over the appliance to the user (see Section 6.2).
Fig. 6.1 Function check
6.1.2 Heating
• Switch on the appliance.
• Make sure that there is a heat request.
• Press “
i
” to activate the status indicator.
As soon as a heat request is received, the appliance runs
through the status indicators “
S. 1
” to “
S. 3
”, until the
appliance is running correctly in normal mode and the
display shows “
S. 4
”.
plus
pro
Fig. 6.2 Display indicator during heating mode
Commissioning Part I 5
Commissioning Part II 6
