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
220-240 V~,
50/60 Hz
Wattmeter
Wattmeter
Power In 3
phase 4 wire
380-415 V 3N~,
50/60 Hz
Pulse signal
(00)
(01)
(02)
(03)
(70)
(71)
(72)
(73)
P
ow
er 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 - 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 Master 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.
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EHP (Electric Heat Pump): It is an electric air conditioner to drive the compressor by electric power.
!
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