*****INTERNAL*****30 R_D proof- 26.10.2022 / 09:15:46- VaillantGroup\DOC-agt\Brand\VIH_QW_190_6\ENG\OI-II_GB_0020291525
0020291525_04 Installation and maintenance instructions 39
8.4 Filling the domestic hot water circuit
1. Open all domestic hot water tap fittings.
2. Wait until water escapes from each draw-off point and
then close all the hot water taps.
3. Check the system for tightness.
8.5 Purging
1. Open the automatic air vent.
2. Start the purge programme for the building circuit P06
via: Menu → Installer level → Test menu → Check
programmes → Purge building circuit.
3. Allow the P06 function to run for 60 minutes.
4. Once both purge programmes have finished, check
whether the pressure in the heating circuit is 150 kPa
(1.5 bar).
◁ Top up with water if the pressure is below 150 kPa
(1.5 bar).
8.6 Switching on the product
Note
The product does not have an on/off switch. The
product is switched on as soon as it is connected
to the power grid.
1. Use the partition that is installed on-site to switch the
product on.
◁ The display shows the basic display.
◁ The basic display appears on the system control
display.
◁ The system's products start up.
◁ The heating and domestic hot water demand are
activated by default.
2. When you start up the heat pump system for the first
time after electrical installation, the installation assist-
ants for the system components will start automatically.
Set the required values on the control panel of the in-
door unit first, then on the optional system control and
the other system components.
8.7 Running the installation assistants
The installation assistant is launched when the product is
switched on for the first time. It provides direct access to
the most important check programmes and configuration
settings for starting up the product.
Confirm the launch of the installation assistant. All heating
and domestic hot water demands are blocked whilst the in-
stallation assistant is active.
Set the following parameters:
– Language
– System control present
– Immersion heater power supply (electric back-up heater)
– Immersion heater power limit (electric back-up heater)
– Cooling technology
– Compressor current limit
– Relay multi-function output
– Intermediate heat exchanger present
– Check programme: Purge building circuit
– Contact details, Telephone number
To access the next item, confirm by pressing Next in each
case.
If you do not confirm the launch of the installation assistant,
it is closed 10 seconds after you switch on the unit and the
basic display then appears. If the installation assistant does
not run through completely, it restarts the next time the unit
is switched on.
8.7.1 Ending the installation assistant
1. Once you have run through the installation assistant
successfully, confirm by pressing .
◁ The installation assistant will close and will not
launch again when the product is next switched on.
2. Observe the corresponding sections and information in
the system instructions.
8.8 Menu functions without the optional system
control
If no system control is installed and this has been confirmed
in the installation assistant, the following additional functions
are displayed in the product's control panel:
– End user level
– Room temperature setpoint
– Screed drying activ.
– Target cylinder temp.
– Domestic hot water cylinder temp.
– Manual cooling activation
– Installer level
– Heat curve
– Summer sw.-off temp.
– Heating biv. point
– DHW bivalence point
– Heating alt. point
– Max. flow temperature
– Min. flow temperature
– Heating mode activ.
– DHW activation
– Cyl. charg. hysteresis
– Limp home mode Immersion heater: Heating/DHW
– Cooling target flow
– Screed drying day
If the system control has been retroactively removed or a de-
fect is present, you must reset the product to the factory set-
ting and select the system control in the installation assist-
ant in order to obtain the additional functions in the product's
control panel.
8.9 Enabling the electric back-up heater
The electric back-up heater is controlled automatically and
according to demand. Set the maximum output for the elec-
tric back-up heater at the indoor unit's control panel here.
On the system control, you can select whether the electric
back-up heater is to be used for heating mode, domestic hot
water mode or both modes.
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