Commissioning; Filling And Venting The Heating System; Operation Without Outdoor Unit (Stand-Alone Mode And Chimney Sweep Mode) - Bosch Compress Hybrid 7000i AW Installer's Manual

7

Commissioning

7.1

Filling and venting the heating system

NOTICE
The system will be damaged if it is turned on without water.
The system may be damaged if it is turned on without water.
▶ Fill the DHW cylinder and heating system before turning on the
heating system, and establish the correct pressure.
Hydraulic diagram of the indoor unit Fig. 40, page 30
Filling the heating system
▶ Interrupt the power supply to the outdoor unit, indoor unit and
external booster heater.
▶ Activate automatic air vent valve by unscrewing the screw a couple of
turns to loosen it, without completely removing it.
▶ Open all valves in the heating system.
▶ If installed, activate the other automatic air vent valves in the
heating system.
▶ Ensure flow rate at the particulate filter, open ball valve if required.
▶ Slowly fill the heating system via an external booster heater.
Operating pressure
1.2-1.5 bar Minimum charge pressure. Fill the system to a pressure
of 0.2–0.5 bar above the pre-charge pressure of the
expansion vessel when the heating system is cold.
3 bar Maximum charge pressure at maximum heating water
temperature: must not be exceeded (the pressure relief
valve will open).
Table 4 Operating pressure
▶ If the pressure does not remain constant, check whether the heating
system and the expansion vessel are tight.
▶ Reconnect the power supply to the outdoor unit, indoor unit and
external booster heater.
Compress Hybrid 7000i AW – 6721833053 (2020/09)
Venting the heating system
▶ Select the menu item Activate function tests in the service menu of
the indoor unit to start the ventilation program.
Alternative:
▶ Select the menu item DHW circulation pump: ON/OFF in the
service menu.
▶ Switch the DHW circulation pump of the indoor unit on and off
cyclically with a speed of 100%.
▶ If installed, switch other DHW circulation pumps in the heating
system cyclically on and off.
▶ Check the operating pressure and top up water if necessary until the
required pressure in the heating system has been reached.
▶ Vent the system via other air vent valves of the heating system
(e.g. radiators).
▶ Repeat steps 1 to 4 until the heating system has been vented.
▶ Clean the particulate filter.
7.2 Operation without outdoor unit (Stand-alone mode
and chimney sweep mode)
The indoor unit can be brought into operation without the outdoor unit
connected, for example when the outdoor unit is installed later. This is
referred to as Stand-alone mode or stand-alone operation.
In Stand-alone mode, the indoor unit uses the external booster heater
exclusively for heating.
If the indoor unit and the heating system are filled before the outdoor unit
is connected, circulation of the heat transfer medium must be ensured:
▶ Connect the heat transfer medium input and output.
▶ Open all shut-off valves in the heat transfer medium circuit.
Commissioning in individual operation:
▶ In the service menu Heat pump, set the option Stand-alone mode
(Control unit manual).
The setting Stand-alone mode is also required for chimney sweep mode!
▶ In the service menu Heat pump, set the option Stand-alone mode
(Control unit manual).
▶ Once the work in chimney sweep mode is complete, reset the setting.
Commissioning
23