Operating instructions

Operation
Operating instructions ecoTEC plus 0020116701_00 13
5
5 Operation
5.1 Putting the boiler into service.
5.1.1 Opening/closing the isolator devices
i
If the boiler is fitted with a bottom cover, the iso-
lating devices are under this cover.
90°
4
3
1
2
5.1 Opening the isolator devices on the VUW boiler
90°
4
3
1
5.2 Opening the isolator devices on the VU boiler
The isolator devices are open if the slot for the screwdriver
is parallel to the pipes.
> Open the gas isolator cock (3.
> Check that the heating flow (4) and heating return (1)
isolator devices are open. Open these if they are closed.
For the unit version VUW and VUI:
> Also open the cold water stop valve (2).
> In order to check this, open a hot water tap at a draw-off
point and check that water flows out.
Closing isolator devices
The isolator devices are closed if the slot for the screw-
driver is at a right-angle to the pipes.
5.1.2 Switching on the boiler
b
Caution!
Risk of damage caused by frost.
Frost protection and monitoring devices are
only active while the boiler is connected up
to the power supply and your boiler is
switched on using the on/off switch.
> Do not isolate the boiler from the power
mains.
> Leave your boiler switched on at the on/
off switch.
To ensure that the frost protection and monitoring devices
remain active, switch your boiler on and off using the con-
troller (see the corresponding operating instructions for
more information on this).
¬ Section 10 describes how to fully shut down your boiler.
50
1
2
5.3 Switching on the boiler
> Press the on/off switch (1) to switch on the boiler.