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HT
Method C
（Double zone control）
RT1
zone1
There are three methods for connecting the thermostat cable
(as described in the picture above) and it depends on the
application.
（Mode set control）
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 ROOM THERMOSTAT to
MODE SET：
When "CL" of the thermostat keep closing for 15s, the
A.1
system will run according to the priority mode set on the
user interface.
When "CL" of the thermostat keep opening for 15s
A.2
and "HT" close , the system will run according to the
non-priority mode set on the user interface.
A.3
When "HT" of the thermostat keep opening for 15s
and "CL" open , the system will turn off.
A.4
When "CL" of the thermostat keep opening for 15s
and "HT" open , the system will turn off.
The port closing voltage is 12VDC, the port disconnection
voltage is 0VDC.
（One zone control）
Method B
RT provide the switch signal to unit. User interface FOR
SERVICEMAN set ROOM THERMOSTAT to ONE ZONE：
B.1 When unit detect voltage is 12VDC between HT and COM,
unit turns on.
B.2 When unit detect voltage is 0VDC between HT and COM,
unit turns off.
（Double zone control）
Method C
Hydraulic Module is connected with two room thermostat, while
user interface FOR SERVICEMAN set ROOM THERMOSTAT
to DOUBLE ZONE:
C.1 When unit detect voltage is 12VDC between HT and COM
,zone1 turn on.When unit detect voltage is 0VDC between HT
and COM, zone1 turn off.
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COM
CL
POWER IN
POWER IN
RT2
zone2
C.2 When unit detect voltage is 12VDC between CL and COM,
zone2 turn on according to climate temp curve. When unit
detect voltage is 0V between CL and COM, zone2 turn off.
C.3 When HT-COM and CL-COM are detected as 0VDC, unit
turn off.
C.4 when HT-COM and CL-COM are detected as 12VDC, both
zone1 and zone2 turn on.
The wiring of the thermostat should correspond to the
settings of the user interface.
Power supply of machine and room thermostat must be
connected to the same Neutral Line .
When ROOM THERMOSTAT is not set to NON, the
indoor temperature sensor Ta can't be set to valid.
Zone 2 can only operate in heating mode, When cooling
mode is set on user interface and zone1 is OFF,"CL" in
zone2 closes, system still keeps 'OFF'. While installation,
the wiring of thermostats for zone1 and zone2 must
be correct.
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.
7) For remote shut down:
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CLOSE: SHUT DOWN
35
NOTE
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