3
8
8.4
[Fig. 8.4.1]
A
: Short-circuit wire (Connected before delivery from manufacturer)
B
: Pump interlock circuit connection (field-supplied)
TB8
3
4
63PW
A
B
[Fig. 8.4.2]
8
8.1
[Fig. 8.1.1]
8
8.4
Terminal No.
TB8-1, 2
Output
Relay contacts output
Rated voltage: ~ 208/230V
Rated load: 1A
Operation
•
When setting No.917 for Dip switch 4 (
Dip switch 6-10 is ON)
is OFF.
The relay closes during compressor operation.
SW4 0: OFF, 1: ON
1 2 3 4 5 6 7 8 9 10
1 0 1 0 1 0 0 1 1 1
• When setting No.917 for Dip switch 4 (Dip switch 6-10 is ON) is
ON.
The relay closes during reception of cooling or the heating operation signal from the controller.
(Note: It outputs even if the thermostat is OFF (when the compressor is not operating).)
A
: Main circulating water pipe
D
: Water outlet (upper
)
G
: Water inlet (lower
)
B
: Shutoff valve
E
: Refrigerant pipes
H
: Drain pipe
C
: Shutoff valve
F
: Y-type strainer
C
A
G
D
H
E
B
F
Heat source unit sample installation
TM1
TM2
1
TB8
2
3
4
1
TB8
2
3
4
MP
~ 208/230V
52P
MCB
L1
L2
A
C
B
A
52P
TM1 TM2
Operation
ON signal
X
Pump interlock
Operation
ON signal
Pump interlock
X
A
: Heat source unit
B
: Control panel (field-supplied)
C
: To next heat source unit
