LG PDI Premium PQNUD1S40 - Installation Method; Diagram of Overall Product Configuration

8
INSTALLATION METHOD
ENGLISH
INSTALLATION METHOD
Diagram of overall product configuration
When interlocked to pulse type wattmeter
• When interlocked to EHP product
- Independent Operation of Power Indicator (interlocked to EHP products)
Power In
single phase
60Hz 220V
Wattmeter
Wattmeter
Power In 3
phase 4 wire
60Hz 380V
Pulse signal
(00) (01) (02) (03)
(70) (71) (72) (73)
Power cable of indoor unit
Pulse signal
RS485
(LGAP)
Pulse signal
POWER
WHM
PQNUD1S40
ODU
MENU
SELECT
WHM
CHECK
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 - 400msec.
• The wattmeter pulse must be able to sink at least 3mA or more of current in the power
indicator.
• Use the wattmeter of 1W/pulse, 2W/pulse, 4W/pulse, 6W/pulse, 8W/pulse, 10W/pulse,
100W/pulse and PT/CT (1-50,000).
• When setting the wattmeter, set it to Master Mode.
• Maximum of 8 wattmeters can be installed.
• The distance between power indicator and wattmeter should be shorter than 10m in
normal circumstance.
• When electrical or mechanical noise is expected, more shorter wiring is needed.
h EHP (Electric Heat Pump): It is an electric air conditioner to drive the compressor by electric power.
!