Commissioning
29
Compress 5800i AW – 6721862724 (2023/06)
7.4 Adjusting the operating pressure of the heating
system
Table 11 Operating pressure
▶ If the pressure does not remain constant, check whether the heating
system and the expansion vessel are tight.
7.5 Adjusting the Electrical auxiliary heater
The appliance can be operated either with a single-phase or a 3-phase
connection. The default setting for specific countries will be the 3kW
single-phase connection ( see table 12). This setting can be changed
in the Electrical auxiliary heater menu.
Table 12 Countries with single-phase connection set by default
To change the default setting, follow the steps below:
▶ In the Service menu: System settings > Auxiliary heater > Electrical
auxiliary heater.
7.6 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.
7.7 Function test
The compressor is preheated before starting. This can take up to
30 minutes, depending on the outdoor temperature. The prerequisite
for starting is that the compressor temperature (TR1) is 20K higher than
the supply air temperature (TL2) and 20K lower than the flow
temperature from the heat pump (TC3). The set point is limited between
20 °C and 45 °C. The temperatures are displayed in the diagnosis menu
of the control unit.
Quick start of the heat pump is only possible when there is an active heat
demand.
The manual defrost of the heat pump is only possible when the
compressor is running with the 4-way valve in heating mode and the
outdoor temperature is below 15 °C.
When the function test menu is activated on the control panel, software
restrictions are deactivated (i. e. high temperature protection for under
floor heating).
▶ Test active components of the system.
▶ Check if there is a heating or hot water demand.
-or-
▶ Draw off DHW or increase the heating curve to generate demand (
instructions for control unit).
▶ Check whether the heat pump starts.
▶ Make sure that no alarms are currently active.
-or-
▶ Troubleshooting.
▶ Check the operating temperatures ( instructions for the control
unit).
7.7.1 Overheating protection (OHP)
The overheating protection triggers when the temperature of the electric
booster heater rises above 88 °C.
▶ Make sure that the particle filter is not blocked and that the flow
through the heat pump and heating system is unimpeded.
▶ Check the operating pressure.
▶ Check the heating and DHW settings.
▶ Reset the overheating protection. To do this, press the button on the
electrical heater.
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).
Countries
France
Great Britain
Ireland
Italy
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