Vaillant ecoTEC plus 937, Instructions And Maintenance Instructions, Page: 36 / 64

Installation and maintenance instructions ecoTEC plus 0020031552_03 36
6 Commissioning Part II: Functional
checks
6.1 Functional checks
6.1.1 Method of procedure
After installing and setting the gas, perform a function
check before commissioning the appliance and handing
over to the user.
• Commission the appliance in accordance with the in-
structions in the relevant operating manual.
• Check the gas supply pipework, the flue system, the
heating system and the hot water pipework for leaks.
• Check that the flue system is properly fitted in accord-
ance with the installation instructions for the flue sys-
tem.
• Check the ignition and whether the burner is showing
a consistent flame picture.
• Carry out a function check of the heating system (see
Section 6.1.2) and the hot water preparation (see Sec-
tion 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 demand.
• Press "
i " to activate the status indicator.
As soon as there is a heat demand the display runs
through status indications "
S. 1 " to " S. 3 ", until the ap-
pliance is running properly in normal operation and the
display shows
" S. 4 ".
Fig. 6.2 Display in heating mode
6.1.3 Hot water operation
• Switch on the appliance.
• Open the hot water tap fully.
• Press "
i " to activate the status indicator.
If the hot water operation is operating properly, the dis-
play shows "
S.14 ".
Fig. 6.3 Display during hot water preparation
6.1.4 Storage tank charging
h
Note
The storage tank charging is delivered de-acti-
vated and must be activated during commis-
sioning.
The storage tank charging of the shift load storage tank
is only active if the warm start function is switched on.
This is shown by the symbol in the display.
With the storage tank charging function switched on
you can set the following temperatures using the knob
for hot water draw-off temperature:
- Knob setting "b“ 50 °C
- Knob setting "a“ 65 °C
With the storage tank charging function switched off
you can set the following temperatures using the knob
for hot water draw-off temperature:
- Knob setting "c“ 35 °C
- Knob setting "a“ 65 °C
6 Commissioning, Part II: Functional checks