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Commissioning
6.9.6
Connections XCU-THH (XCU HY) module
MD1
T1
I1
I2
I3
I4
CAN-Bus
To ODU
EMS-Bus
Fig. 37 Connections XCU-THH (XCU HY)
[I1] External input 1
[I2] External input 2: Blocks heating or DHW
[I3] External input 3: Heating circuit overheat protection (safety
thermostat)
[I4] External input 4: Smart Grid (SG)/ Photovoltaic (PV)
[MD1]Condensation sensor (accessory for cooling mode)
[T1] Temperature sensor outdoor
[1]
EMS-BUS accessory
[2]
CAN-BUS to heat pump
The tightening torque of the screws for the connectors of the XCU-THH
(XCU HY) must be 0.5Nm.
28
%
ϑ
ϑ ϑ
2
1
7
Commissioning
WARNING
Material damage from frost!
The heating or auxiliary heater may be irreparably damaged by frost.
▶ Do not start the indoor unit if there is a possibility of the heating or
auxiliary heater being frozen.
HThe system will be damaged if it is commissioned without water
▶ Only operate the device when it is filled with water and at the correct
operating pressure.
Do not turn on the indoor unit in case that existing valves to the heating
system or to the heat pump are closed.
▶ Check that all valves in the system are opened.
Compress 5800i AW – 6721858460 (2023/06)
0010040240-004
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