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10 Electrical wiring
TCGB0070 rev.3 - 04/2012
134
Terminal board connections
Mark
Part name
Description
TERMINAL BOARD 1 (TB1)
N
AC 230V
AC 400V Main power supply connection
L1
L2
-
L3
TERMINAL BOARD 2 (TB2)
1
Indoor/Outdoor commu-
tation cables
The H-LINK transmission between outdoor unit and indoor unit is
wired to terminals 1-2.
2
3
Opentherm communica-
tion cables
Only for Intelligent Room thermostat accessory: The receiver is
connected to the polarity-free terminals A/B.
4
5
Optional ON/OFF Room
thermostat
The air to water heat pump system has been designed to allow
the connection of a remote thermostat to effectively control your
home’s temperature. Depending on the room temperature, the
thermostat will turn the air to water heat pump system ON and
OFF. You will also be able to program the on and off times and
achieve intelligent consumption levels.
6
7
L Common
Terminal Line common for swimming pool, tariff switch or solar
input accessory.
8
Swimming pool input
Only for swimming pool installations: It is necessary to connect an
external input to the air to water heat pump to provide signal when
Water pump of Swimming pool is ON.
9
Tariff switch input
If a tariff–switching device is provided by the electricity utility, it can
be used to prevent the heat pump switching ON.
10
Solar input
Available input for Solar combination with Domestic Hot Water
Tank.
11
Domestic Hot Water
valve
The air to water heat pump can be used to heat DHW. This output
will be on when DHW is activated.
12
N common
Neutral terminal common for accessory devices.
13
Swimming pool valve
The air to water heat pump can be use to heat Swimming pool.
This output will be on when Swimming pool is activated.
14
Earth Connection
Terminal earth connection for accessories.
15
Mixing valve close
When a mixing system is required for a second temperature con-
trol, these two outputs are necessary to control de mixing valve.
16
Mixing valve open
17
N Common
18
Water Pump 2 (WP2)
When there is a second temperature application, a secondary
pump is the circulating pump for the secondary heating loop.
19
Water Pump 3 (WP3)
When there is a hydraulic separator or buffer tank, additional Water
pump (WP3) is needed.
20
21
Boiler output
The boiler can be used when the heat pump cannot achieve the
required temperature itself.
22
23
Electrical Heater DHW
Output
If DHW Storage tank contains an electric heater, the air to water
heat pump can enable it if the heat pump cannot achieve the requi-
red DHW temperature itself.
24
25
Solar output
Output for solar combination with Domestic Hot Water Tank.
26
27
DHW thermistor
The DHW sensor is used to control the domestic hot water storage
tank.
28
Common thermistor
Common terminal for thermistor.
29
Water outlet boiler
(THMwo3)
Water sensor for boiler combination.
30
Water outlet C2 thermis-
tor (THMwo2)
The sensor is used for the second temperature control and should
be positioned after the mixing valve and the circulation pump.
31
32(+) Second ambient ther-
mistor
The sensor is used for the second ambient temperature control
and should be positioned outside
33(-)
34(+) Swimming pool ther-
mistor
The sensor is used for the swiming pool temperature control and
should be positioned inside plate HEX of swimming pool
35(-)