Preparing For Initial Operation; Opening The Shut-Off Valves; Checking The System Pressure; Start-Up - Vaillant atmoCRAFT VK SERIES Operating Manual

4 Operation
1 Display of the current heating feed temperature
or display of a status or fault code
Flue problem
Flue problem
Permanently on:
Flashing:
Hot water preparation active
Permanently on:
Flashing:
Heating pump in operation
Actuating internal gas valve
Flame with cross:
Fault during burner operation;
Unit is switched off
Flame without cross:
Burner operation normal
4.2

Preparing for initial operation

4.2.1 Opening the shut-off valves

Note!
The shut-off valves are not included in the
scope of supply of your unit. They are fitted by
your heating engineer in the installation. He
should show you the location and how to
operate these components.
• Open the gas stop cock by depressing and turning it
anticlockwise as far as it will go.
• Check that the service valves in the feed and the
return are open.

4.2.2 Checking the system pressure

3
2
1
0
bar
Fig. 4.4 Checking the filling pressure of the heating installation
(pressure gauge not included)
8
Heating operation active
Burner lockout time active
Operating mode storage tank
charging in readiness
Storage tank charging is in
operation
Burner on
1
4
5
6
• Check the filling pressure of the installation using the
pressure gauge (1, not included). For the heating
system to operate properly, the pointer on the
pressure gauge (1) must be between 1.0 and 2.0 bar
filling pressure. If it is below 0.75 bar, please top up
the water (see Section 4.8.7).
If the heating system extends over several storeys, the
system may require a higher filling pressure. Ask your
engineer for details.
4.3

Start-up

Caution!
Risk of damage!
The main switch may only be turned on if the
heating system is sufficiently full of water (see
Section 4.2.2).
If this is not complied with, damage to the
pump and heat exchanger may occur.
2
Fig. 4.5 Switch the unit on
• Use the main switch (1) to switch the appliance on and off:
I: "ON"
0: "OFF"
When the main switch (1) is in the "I" position the unit is
switched on. On the display (2), the standard read-out of
the Digital Information and Analysis System Systems is
shown (for the details see Section 4.1).
To adjust the appliance according to your requirements,
read sections 4.4, and 4.5, which describe the setting
options for hot water supply and heating.
1
Operating manual atmoCRAFT