Turning The Boiler On; Domestic Hot Water With Ecotec Combination; Boilers; Setting The Water Temperature - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

Note
Your appliance has a pressure sensor.
If the pressure falls below 0.6 bar the pressure
flashes in the display.
If it falls below 0.3 bar the appliance switches
off. The error message F.22 appears in the dis-
play. The system must be filled with water
before you start up the appliance again.
4.4

Turning the boiler ON

2
Fig. 4.8 Switching on the appliance (example: ecoTEC plus)
• Use the main ON/OFF control (1) to switch the appli-
ance on.
I: "ON"
0: "OFF"
When you switch on the appliance, the current operating
status appears in the display (2).
To adjust the appliance according to your requirements,
read sections 4.5 and 4.6, which describe the setting
options for hot water supply and heating.
Caution
Risk of damage.
The boiler frost protection and monitoring sys-
tems are only active when the main ON/OFF
control of the appliance is in the "I" position
and it is not disconnected from the main power
supply.
Instructions for use ecoTEC
Supplied By www.heating spares.co Tel. 0161 620 6677
i F P
bar
1
4.5

Domestic hot water with ecoTEC combination

boilers

The boiler must only be used when the heating system
contains water (see 4.3.2).

4.5.1 Setting the water temperature

plus
2
3
Fig. 4.9 Setting the water temperature
• Switch on the appliance as described in section 4.4.
• The domestic hot water temperature can be adjusted
using the hot water temperature control (3).
• Turn the control clockwise to increase the temperature
and anti-clockwise to decrease the temperature. This
corresponds to:
- left limit approx.
- right limit max.
Note
This control adjusts the maximum domestic hot
water temperature. If adjusting the control
upwards appears to have no effect on the tem-
perature, then the boiler is already operating at
full output for the selected flow rate.
When you adjust the required temperature, the set value
is shown in the display (2).
After five seconds the display returns to standard mode
(the current heating flow temperature).
Caution
If you live in a hard water area please do not
set the control knob (3) above the mid (12
o'clock) position to prevent excessive scale for-
mation.
Operation 4
pro
i F P
bar
35 °C
65 °C.
9