6
English (US)
Multi-zone pump board expansion
Fig. 3
UPZCP multi-zone pump board expansion
See fig.
•
You can only use the MASTER controller
with PRIORITY.
•
When priority calls, the MASTER board will
produce 5 VDC between terminals B and C.
This tells the SLAVE board to turn off any
zones that are calling for heat. This also will
close the contacts XX PRIORITY.
•
When there is a demand for heat, the SLAVE
board will produce 5 VDC between terminals
A and C. This tells the MASTER board to
activate any boiler or secondary pumps and
close the contacts XX MAIN.
•
You can connect the pump and valve boards.
•
When the SLAVE board calls for heat, the
secondary pump will be powered. If a boiler
pump and secondary pump are to be used,
connect them to the same terminals.
•
You can use the low voltage wire to connect
ABC terminals.
•
Connect the 120 VAC power supply to each
board.
TM
06
5
606
50
15
C
B
A
C
B
A
Master
Slave
Master
Slave
E
X
P
A
N
S
I
O
N
E
X
P
A
N
S
I
O
N
Master board
Slave board
Caution
CAUTION
Connect the L and N terminals the
same way on each board. If switched,
a differential of 240 VAC can occur
resulting in damage to the equipment.
