Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 2
220-240VAC
0.2
0.75
N
4
5
TBH
TANK BOOST HEATER
CONTROL SIGNAL OUTPUT
46
47
NOTE
When ROOM THERMOSTAT is set to YES, the indoor temperature sensor Ta can't be set to valid, unit running only
according to T1.
NOTE
● The wiring of the thermostat should correspond to the settings of the user interface. Refer to 10.7 Field setting/
Room Thermostat.
● Power supply of machine and room thermostat must be connected to the same Neutral Line and (L2) Phase Line(for
3-phase unit only).
• Method A
RT can control heating and cooling individually, like the controller for 4-pipe FCU. When the hydraulic module is connected
with the external temperature controller, user interface FOR SERVICEMAN set THERMOSTAT and ROOM MODE SETTING
to YES:
A.1 When unit detect voltage is 230VAC between C and N ,the unit operates in the cooling mode.
A.2 When unit detect voltage is 230VAC between H and N, the unit operates in the heating mode.
A.3 When unit detect voltage is 0VAC for both side(C-N, H-N) the unit stop working for space heating or cooling.
A.4 When unit detect voltage is 230VAC for both side(C-N, H-N) the unit working in cooling mode.
• Method B
RT provide the switch signal to unit. user interface FOR SERVICEMAN set ROOM THERMOSTAT and MODE SETTING to
YES:
B.1 When unit detect voltage is 230VAC between H and N, unit turn on.
B.2 When unit detect voltage is 0VAC between H and N, unit turn off.
• Method C
Hydraulic module is connected with two external temperature controllers, while user interface FOR SERVICEMAN set DUAL
ROOM THERMOSTAT to YES:
C.1 When unit detect voltage is 230VAC between H and N ,the MAIN side turn on.When unit detect voltage is 0VAC between
H and N, the MAIN side turn off.
C.2 When unit detect voltage is 230VAC between C and N, the ROOM side turn on according to climate temp curve. When
unit detect voltage is 0V between C and N, the ROOM side turn off.
C.3 When H-N and C-N are detected as 0VAC, unit turn off.
C.4 when H-N and C-N are detected as 230VAC, both MAIN and ROOM side turn on.
a) Procedure
● Connect the cable to the appropriate terminals as shown in the picture.
● Fix the cable with cable ties to the cable tie mountings to ensure stress relief.
8) For booster heater:
Connection of the booster heater cable depends on the
application. Only when the domestic hot water tank is
installed will this wiring be needed. The unit only sends
a turn on/off signal to the booster heater. An additional
circuit breaker is needed and a dedicated terminal is
needed to supply power to the booster heater.
See also "8 Typical application examples" and "10.7
Field settings/DHW control" for more information.
a) Procedure
● Connect the cable to the appropriate terminals as
shown in the picture.
● Fix the cable with cable ties to the cable tie
mountings to ensure stress relief.
