Sinclair SCV-50EA Service Manual page 43

2) SCV-100EA, SCV-120EA, SCV-140EA, SCV-160EA
a. Additional pump
"PUMP2" terminal only provides passive switching signal.
Additional water pump must be controlled by the AC contactor.
b. Remote alarm
Remote alarm terminal only provides passive switching signal.
Current passing through the terminal interface should less than 1.5A, otherwise please use AC contactor to
control load indirectly.
c. Remote shutdown
If switch is closed, the unit will be stopped forcibly.
Under this circumstance, anti-frozen protection and other protection functions are still effective.
If switch breaks, unit can run normally according settings.
Main control board
1
2
L
220-240V
N
L
220-240V
N
A1
AC contactor
A2
Additional pump
Main control board
4
3
5
6
SWITCH
41