116
ENGLISH
A.1 When unit detect voltage is 230VAC between CL and L1 ,the unit
operates in the cooling mode.
A.2 When unit detect voltage is 230VAC between HL and L1, the unit
operates in the heating mode.
A.3 When unit detect voltage is 0VAC for both side (
CL-L1, HL
-L1) the
unit stop working for space heating or cooling.
A.4 When unit detect voltage is 230VAC for both side (
CL-L1, HL
-L1) the
unit working in cooling mode.
Method B (one zone control)
RT provide the switch signal to unit. User interface FOR SERVICEMAN set
ROOM THERMOSTAT to ONE ZONE:
B.1 When unit detect voltage is 230VAC between HL and L1, unit turns on.
B.2 When unit detect voltage is 0VAC between HL
and L1, unit turns off.
Method C: Double zone control:
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 230VAC between HL and L1 ,zone1 turns
on.When unit detect voltage is 0VAC between HL and L1, zone1 turns
off.
C.2 When unit detect voltage is 230VAC between CL and L1, zone2 turns
on according to climate temp curve. When unit detect voltage is 0V
between CL
and L1, zone2 turns off.
C.3 When HL-L1 and CL
-L1 are detected as 0VAC, unit turns off.
C.4 when HL-L1 and CL-L1 are detected as 230VAC, both zone1 and
zone2 turn on.
RT1
POWER
IN
Room thermostat type2 (Low voltage):
30
29
32
25 26 27
28
31
7
12
11
10
9
18
8
7
5
23
22
24
1
2
13
3
4
6
20
14 15
17
19
16
21
6
8
9
10
5
4
3
2
1
CN4
CN22
CN5
S3
DIS1
CN24
CN1
CN2
CN6
CN8
CN13
CN15
CN16
CN18
CN28
S2
CN42
CN21
S1
S4
CN11
CN7
CN17
CN19
CN30
CN35
CN14
CN31
CN36
CN25
CN29
CN40
CN41
CL
CO
M
HT
EVU
SG
Method A
CL
HL
COM
RT1
POWER
IN
30
29
32
25 26 27
28
31
7
12
11
10
9
18
8
7
5
23
22
24
1
2
13
3
4
6
20
14 15
17
19
16
21
6
8 9 10
5
4
3
2
1
CN4
CN22
CN5
S3
DIS1
CN24
CN1
CN2
CN6
CN8
CN13
CN15
CN16
CN18
CN28
S2
CN42
CN21
S1
S4
CN11
CN7
CN17
CN19
CN30
CN35
CN14
CN31
CN36
CN25
CN29
CN40
CN41
CL
CO
M
HT
EVU
SG
Method B
HL
COM
(
Mode set control
)
(
One zone control
)
CN32
SW9
CN32
SW9
CL
HL
COM
RT1
POWER IN
RT2
POWER IN
30
29
32
25 26 27
28
31
7
12
11
10
9
18
8
7
5
23
22
24
1
2
13
3
4
6
20
14 15
17
19
16
21
6
8 9 10
5
4
3
2
1
CN4
CN22
CN5
S3
DIS1
CN24
CN1
CN2
CN6
CN8
CN13
CN15
CN16
CN18
CN28
S2
CN42
CN21
S1
S4
CN11
CN7
CN17
CN30
CN35
CN31
CN36
CN25
CN29
CN40
CN41
CL
CO
M
HT
EVU
SG
Method C
zone1
zone2
(
Double zone control
)
CN32
SW9
There are three methods for connecting the thermostat cable (as de
-
scribed in the picture above) and it depends on the application.
Method A (mode set control)
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:
A.1 When unit detect voltage is 12VDC between CL and COM ,the
unit operates in the cooling mode.
A.2 When unit detect voltage is 12VDC between HL and COM, the
unit operates in the heating mode.
A.3 When unit detect voltage is 0VDC for both side (CL-COM,
HL-
COM) the unit stop working for space heating or cooling.
A.4 When unit detect voltage is 12VDC for both side (CL-COM,
HL-
COM) the unit working in cooling mode.
Method B (one zone control)
RT provide the switch signal to unit. User interface FOR SERVICE-
MAN set ROOM THERMOSTAT to ONE ZONE:
B.1 When unit detect voltage is 12VDC between HL and COM, unit
turns on.
B.2 When unit detect voltage is 0VDC between HL and COM, unit turns
off.
Method C (double zone control)
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 HL and COM,
zone1 turn on.When unit detect voltage is 0VDC between HL
and COM, zone1 turn off.
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 HL-COM and CL-COM are detected as 0VDC, unit turn
off.
C.4 When HL-COM and CL-COM are detected as 12VDC, both zone1
and zone2 turn on.
NOTE
The wiring of the thermostat should correspond to the settings of
the user interface. Refer to 10.5.6 “Room Thermostat”.
Summary of Contents for 20191845
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