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Selection of Electricity meter, CT, and VT.
Please take the follow item into consideration to select electricity meter, CT,VT.
Install the electricity meter with refrigerant system unit as possible.
Select VT/CT with a low ratio.
In the case that a electricity meter specified in pulse unit (kWh/ pulse) is used, a output of kWh/ pulse
should be selected usually.
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Outdoor unit connection interface (CN135) to electricity meter
Item
Interface
Non-powered connection point "a" *3
Pulse
Specifica-
Width: 50ms or greater
tions
Interval: 50ms or greater
Unit
1 kWh/ pulse (pulse units) is recommended.
A fixed
However, with consideration given to the
number
power meters that can be obtained in some
countries, power meters with 3,200 pulse/kWh
(fixed number of pulses) and below are also
supported.
Wire length limitations
150m(492ft) or less
Wiring specification
Control and instrumentation cable CVV-S
(Control-use Vinyl insulated Vinyl sheathed
cable - Shielding) *2
2 cores 1.25mm
*1: Pulse signal that is OFF when electricity is flowing (open), and ON at the time of a short circuit (closed).
*2: In the case of the trouble effect caused by induction, please select a CVV cable ( CVV-S cable) with
shield.
Because the copper shield tape is wrapped on CVV cable make it has a effect to relax induction trouble
from near power cable to keep normal transmission.
In additional, in the case of the wiring at outdoor, please select a weather-resistant one.
*3: To connect an electricity meter, an additional service part "External Input Wire"(Parts No.9368777005)
is required.
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Restrictions on electricity meter installation
Item
Number of electricity meters
installed
That which the electricity meter
is connected to
Copyright© 2013-2015 Fujitsu General Limited. All rights reserved.
Specifications
2
(16AWG)
Specifications
Max.200
For each System Controller Lite
Max.1
Number of units connected to one outdoor unit (Master or Slave)
Any
There are no restrictions on outdoor units which the electricity
meter connects to.You can connect any electricity meter to any
outdoor unit.
303
Remarks
Connection point "a": ON upon short cir-
cuit*1
Between Electricity meter to Outdoor unit
Remarks
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