LG PQNUD1S41 Installation & Owner's Manual page 9

• Interlocked Operation with Central Controller (interlocked to EHP product)
Wattmeter
Pulse signal
Power In
single phase
220-240 V~,
50/60 Hz
(00)
(70)
Power cable for 3 phase 4 wire
Power cable for single phase
Communication cable (2 wire shielded cable): Between outdoor unit and central controller
Communication cable (2 wire shielded cable): Between indoor unit and outdoor unit
Pulse signal wire
Refrigerant pipe
CAUTION
!
• Depending on the electric power, use the wattmeter for remote reading by sending the
pulse signal.
• Use the wattmeter with the pulse width of 50 - 400 ms.
• The wattmeter pulse must be able to sink at least 3 mA or more of current in the power
indicator.
• Use the wattmeter of 1 W/pulse, 2 W/pulse, 4 W/pulse, 6 W/pulse, 8 W/pulse, 10 W/pulse,
100 W/pulse and PT/CT (1-50 000).
• When setting the wattmeter, set it to Slave Mode.
• Maximum of 8 wattmeters can be installed.
• The distance between power indicator and wattmeter should be shorter than 10 m in
normal circumstance.
• When electrical or mechanical noise is expected, more shorter wiring is needed.
• For watt-hour meter setting, inquire to the corresponding vendor.
Pulse signal
POWER WHM
MENU
SELECT
PQNUD1S40
ODU WHM CHECK
Pulse signal
(01) (02) (03)
(71) (72) (73)
INSTALLATION METHOD
Wattmeter
RS485
(LGAP)
RS485
(LGAP)
9
Power In 3
phase 4 wire
380-415 V 3N~,
50/60 Hz