. Multiple outdoor units control
Note: Do not connect multiple water circulation pumps directly to each output (OUT1). In such a case, connect them via (a) relay(s).
Wiring specification and field supply parts
Item
Name
Model and specifications
External
output
function
Outputs
wire
Use sheathed vinyl coated cord or cable.
Max. 30 m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5 mm² to 1.25 mm²
Solid wire: ø0.65 mm to ø1.2 mm
Signal inputs
Name Terminal block Connector
Item
OFF (Open)
OFF (Short)
RC
TBIN 1-2
—
Communication cable between indoor units
—
—
IN2
TBIN 3-4
CN2F
Flow switch input
Refer to SW2-2 in <9.6 Dip Switch Functions>.
Wiring specification and field supply parts
Item
Name
Model and specifications
Signal input
function
Signal input wire
Use sheathed vinyl coated cord or cable.
Max. 10 m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5 mm² to 1.25 mm²
Solid wire: ø0.65 mm to ø1.2 mm
Switch
Non-voltage “a” contact signals
Remote switch: minimum applicable load 12V DC, 1mA
Thermistor inputs
Name
Terminal block Connector
Item
Optional part model
TH2
—
CN21
Thermistor (Ref. liquid temp.)
—
THW1
—
CNW12 1-2 Thermistor (Flow water temp.)
—
THW2
—
CNW12 3-4 Thermistor (Return water temp.)
—
Note:
Do not splice the wiring to extend or shorten it, or this could affect correct monitoring of each temperature.
If the wiring is too long, bundle it with a strap to adjust the length.
Output
Name
Terminal block Connector Item
OFF
ON
Signal/Max current
OUT1
TBOUT 1-2
—
Water circulation pump 1 output
OFF
ON
230V AC 1.0 A Max
PAC-SIF051B-E
<Fig. ..3>
LED1
LED3
TBIN
4
3
2
1
CN108
LED4
4
3
2
1
TBOUT
S3
S2
S1
N
L
TB6
3 1
CNS2
(RED)
CNW12
(RED)
CN21
(YLW)
1
8
SW1
SW2
SW4
1
8
1
6
4
1
1
3
FTC4 (Slave)
TBOUT
3 4
1 2
OUT1
N L
<Fig. ..4>
Note: Do not connect multiple water circulation pumps directly to each output (OUT1). In such a case, connect them via (a) relay(s).
Wiring specification and field supply parts
Item
Name
Model and specifications
External
output
function
Outputs
wire
Use sheathed vinyl coated cord or cable.
Max. 30 m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5 mm² to 1.25 mm²
Solid wire: ø0.65 mm to ø1.2 mm
