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2.
Electrical Power Connection
1-phase
Residual Current
Circuit-breaker
A
3-phase
B C N GND
B C N GND
AC 380-415V 50Hz
L
N
GND
Residual Current
Circuit-breaker
L
N
GND
AC 220-240V 50Hz
NOTE:
The outdoor units must be installed with an Residual Current
Circuit-breaker near the power supply and must be effectively
earthed.
Remote cooling/heating
SWITCH 2
If switch2 is closed, the unit will shift to heating mode forcibly;
If switch2 breaks the unit will shift to cooling mode forcibly.
Remote shutdown and Remote cooling/heating is optional
function.
Choose this function by DIP switch SW4_1 (for 1-phase) or
SW3_1 (for 3-phase) on PCB board. Factory default has no
remote cooling/heating.
3.
Auxiliary function connections
Additional pump
When the remote control and wire controller used at the same
time, the unit will carry out the last command of arbitrary
terminal.
Remote shutdown has the highest priority. In the status of
remote shutdown, other controllers can’t start the unit.
Wire controller
“PUMP2” terminal only provides passive switching signal.
Additional water pump must be controlled by the AC contactor.
Remote alarm
5kW / 7kW 10kW ~ 16kW
The wire controller is optional.
Please use 3-core shielded wire to connect the wire controller and
the shielding layer must be grounded.
When connecting wire controller, host unit control panel is
mainly used for display which can carry out parameter inquiry
such as inquiry and checking and can’t be used to set mode and
temperature.
“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.
Remote shutdown
SWITCH
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.
NOTE
Main control board
L
N
220-240V
L
220-240V
N A1
AC contactor
A2
Additional pump
Main control board
ON
ON
Without Remote
central function
(Factory default)
With Remote
central function
25


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