Vaillant ecoTEC plus VU Series Installation And Maintenance Instructions Manual - page 16
6 Start-up
16
Installation and maintenance instructions ecoTEC plus 0020029173_04
5.5.8.1 Using the auxiliary relay
1.
Connect an additional component directly to the integ-
rated auxiliary relay using the grey plug on the PCB.
2.
Carry out the wiring. (→ Page 15)
3.
To start up the connected component, select the
component via D.26, see Calling up diagnostics codes
(→ Page 22).
5.5.8.2 Using the VR 40 ("2 in 7" multi-functional
module)
1.
Install the components in accordance with the respect-
ive instructions.
2.
Select D.27 (→ Page 22) to actuate relay 1 on the multi-
functional module.
3.
Select D.28 (→ Page 22) to actuate relay 2 on the multi-
functional module.
5.5.9
Actuating the circulation pump according
to requirements
Note
The product's electronics provide the opportunity
to control a domestic hot water cylinder's circula-
tion pump as necessary (similar to an automatic
light unit for stairs). It is controlled using an ex-
ternal button (to be fitted on-site) that can be in-
stalled anywhere in the dwelling, e.g. in the bath-
room or kitchen. When the button is pressed, the
circulation pump starts up. The pump is switched
on again after five minutes. Several buttons can
be pressed in parallel. Irrespective of the external
control of the circulation pump, the "Control by
programmable time periods" function continues to
be possible when a controller is used.
Conditions: Domestic hot water cylinder connected
▶
Carry out the wiring. (→ Page 15)
▶
Connect the supply line for an external button using ter-
minals 1
(0) and 6 (functional drawing) on the X41
edge connector, which is supplied with the controller.
▶
Plug the edge connector into the PCB slot X41.
6
Start-up
6.1
Carrying out the initial start-up
Initial start-up must be carried out by a customer service
technician or an authorised competent person using the
commissioning checklist. The commissioning checklist in the
appendix (→ Page 38) of the installation instructions must be
filled in and stored carefully along with the unit's documenta-
tion.
▶
Carry out the start-up procedure using the commissioning
checklist in the appendix.
▶
Fill in and sign the commissioning checklist.
6.2
Switching on the product
▶
Set the product's main switch to 1.
◁
The basic display appears on the display.
6.3
Using check programmes
By activating various check programmes, you can trigger
special functions on the product.
Display
Meaning
P.0
Purging check programme:
The internal pump is cyclically actuated.
The heating circuit and the hot water circuit are
purged via the automatic air vent (the cap of the
automatic air vent must be released).
1 x
: Start heating circuit purging (display view:
HP)
2 x
: Start cylinder charging circuit purging
(display view: SP)
3 x
: Exit purging programme
Note
The purging programme runs for 6.5 minutes per
circuit and then terminates.
P.1
Maximum load check programme:
After successful ignition, the product is operated at
maximum heat input.
P.2
Minimum load check programme:
After successful ignition, the product is operated at
minimum heat input.
P.5
SCO (safety cut-out) check programme:
The burner is switched on and the control is
switched off so that the product heats up until it
reaches the safety cut-out's switch-off temperature of
97 °C while avoiding a regular shutdown.
P.6
Check programme, diverter valve mid-position: (not
active)
You can start check programmes P.0 to P.6 by either:
– Switching on the main switch and, at the same time,
pressing and holding
for five seconds or
– Pressing and holding
and
at the same time, re-
leasing
and pressing and holding
for five seconds
The displays shows P. 0.
▶
Press
to move up the check programmes in numerical
order.
▶
Press
to start the check programme.
▶
Press
and
at the same time to exit the check pro-
grammes. You can also exit the check programmes by
not pressing any button for 15 minutes.