Commissioning
Compress 5800i AW – 6721858460 (2023/06)
28
6.9.6 Connections XCU-THH (XCU HY) module
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.
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.
STEPPER STEPPER HCM
HEATERHMI
K30SSK
LIN
BUS
l3 l4
l6l5 l7
04
05
220V
IN
LN
X01
X02
X03
X04
X05
X06
X07
X08
MD1
1
2
IN
grd
T0
12
IN
grd
T1
12
IN
grd
TW1
12
IN
grd
l14
12
IN
grd
l15
12
IN
grd
l16
12
IN
grd
BUS
12
EMS+
EMS-
12
EMS+
EMS-
l13
12
IN
grd
TR3
VW1
A1 A2 B2B1
43
21
PK2
O18
grd
OUT
1
2
PW2
O19
grd
OUT
12
PC1
O20
grd
OUT
12
HIGH
LOW
gnd
CAN BUS
12
34
HIGH
LOW
gnd
CAN BUS
12
34
24V= gnd
MOD BUS
12
3
A
B
TW2
12
IN
grd
/TR7
BUS
EMS-Bus
1
CAN-Bus
To ODU
2
I1
I2
I3
I4
ϑϑ
T1
MD1
ϑ
%
0010040240-004
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