Bosch Compress 5800i AW - Heat Pump, Indoor Unit and Heating System Ventilation; Adjusting the Operating Pressure of the Heating System; Operating Temperatures

Commissioning
Compress 5800i AW – 6721858460 (2023/06)
30
Table 11 Configuration wizard
7.3 Heat pump, indoor unit and heating system
ventilation
NOTICE
If the system is not correctly ventilated (purged), this will damage
the indoor unit!
The auxiliary heater may overheat or be damaged if it has not been fully
vented prior to activation.
▶ Carefully vent the system when filling.
▶ Carefully vent the system once again during commissioning.
Vent also by other ventilation valves in the heating system, e.g. radiators.
1. Connect the power supply to the heat pump and indoor unit.
2. Activate the venting program: > Service > System settings > Heat
pump > Air-purge mode.
3. Vent by all manual venting valves in the heat pump, indoor unit and
heating system ( Fig. 25).
4. Return to normal operation by closing the function test menu.
5. Clean the particle filter SC1.
6. Check the pressure on the pressure gauge GC1 and add more water
with the fill valve if the pressure is below 2 bar.
7. Check that the heat pump is running and that there are no active
alarms.
Table 12 Venting program. X = active component
[PC1] Circulation pump for the heating circuit
[PC0] Primary circulation pump (heat carrier)
[VW1] three-way valve heating/DHW cylinder. X= open towards the
DHW cylinder
[PK2] Cooling season relay
7.4 Adjusting the operating pressure of the heating
system
The pre-charge pressure of the expansion vessel is 0.75 bar.
Table 13 Operating pressure
▶ Top up to 2 bar unless otherwise specified.
▶ If the pressure does not remain constant, check whether the heating
system and the expansion vessel are tight.
7.5 Operating temperatures
The operating temperature check must be performed in heating mode
(not in DHW or cooling mode).
For optimum system operation, the flow rate in the heat pump and
heating system must be monitored. This check should be performed
after 10 minutes heat pump operating time and during high compressor
heating output.
The temperature differential for the heat pump must be set for the
different heating systems.
▶ With underfloor heating system: set a temperature difference of
4.5 K.
▶ With radiators: set a temperature difference of 7.5 K.
These settings are optimal for the heat pump.
Check the temperature differential at high compressor heating output:
▶ Tap on the Heat Pump symbol on the display.
▶ On the System overview, notice the temperatures to and from the
heat pump (outdoor unit).
▶ Check whether the temperature difference corresponds to the delta
value set for heating mode.
If the temperature differential is too large:
▶ Vent the heating system.
▶ Clean filters / strainers.
▶ Check pipe dimensions.
Dew pt.
HCXXX
2)
Set if the cooling function should be controlled by the
dew point temperature. When activated, the
controller maintains the set flow temperature by this
value above the calculated dew point. A remote
control with humidity sensor is required for this
function. [Yes] | [No]. Select [Next] to continue with
the configuration
-or-
[Back] to go back.
Heat. system
type HC1
Set the maximum flow temperature for heating
circuit 1 and confirm.
3)
Radiators / Convectors
Select [Next] to continue with the configuration
-or-
[Back] to go back.
Design
temperature
HC1
Set the design flow temperature for heating circuit 1
and confirm. The design temperature is the desired
flow temperature at minimum outside temperature.
Radiators / Convectors
Select [Next] to continue with the configuration
-or-
[Back] to go back.
System analysis The configuration wizard has been successfully
completed. Save settings and switch to main screen
or continue with further settings?. select Save and
close if the commissioning is done
-or-
select Detailed settings to make further settings.
1) This menu is only shown if a power guard is installed.
2) This menu is only shown if the function Cooling or Heating + Cooling has been
selected.
3) The maximum temperature setting is depending on the variant of the indoor unit.
Menu item Description
Total
duration
1,5 minutes
Duration
(s)
15 15 15 15 15 15
PC1 X X X
PC0
(100%)
X X X X
VW1 X X
PK2 X
Display on the pressure gauge
1.3-1.5 bar Minimum charge pressure. When the heating system
is cold, the filling pressure should be 0.2-0.5 bar
above the pre-charge pressure of the expansion
vessel.
2.5 bar Maximum charge pressure at maximum heating
water temperature: must not be exceeded (the
pressure relief valve will open).