Fujitsu Airstage J-II Series Design & Technical Manual page 803

z Selection of Electricity meter, CT, and VT
„
Select the electricity meter, CT, and VT by considering the following items.
(1) Install electricity meters for each refrigerant system, if circumstances allow.
(2) Select VT/CT with a small VT/CT ratio.
(3) When using an electricity meter which is specified in pulse units (kWh/pulse), usually select
a meter with a 1kWh/pulse output.
z Outdoor unit connection interface (CN135) or touch panel controller
„
connection interface (TM201 CH1) to electricity meter
Item
Interface Dry contact "a" contacts
Pulse Specifi- Width: 50ms or more
cations
Interval: 50ms or more
Units 1kWh/pulse (pulse units) recommended
Constant Considering the electricity meters available in some
countries, use of electricity meters with 3200 pulse/kWh
(pulse constant) or less pulses are possible.
Line length restriction 492ft. (150m) or less
Wiring specifications Control and instrumentation cable CVV-S (Control-use
Vinyl insulated Vinyl sheathed cable – Shielding) *2
2-conductor 16AWG (1.25mm
Line length restriction 25m or less
Wiring specifications 2 core, twisted pair, 0.33mm2 (22AWG) *3
*1: Pulse signal: normally OFF (open), ON (closed) when shorted
*2: When affected by interference by induction, select shielded CVV cable (CVV-S cable).
This is because copper shielding tape is wrapped around CVV cable and induction
interference from adjacent power cables is alleviated and normal communication is
maintained.
In addition, when the wiring is outdoors, select weather resistance cable.
*3: Use cable in accordance with local rules for cable.
z Number of electricity meters installed and connection destination
„
Item
Number of electricity meters
installed
Specifications
2 )
Specifications
Max.200 Per Site (include Max. 4 VRF systems)
- (07 - 156) -
Remarks
"a" contacts: ON when shorted *1
Between Electricity meter to
Outdoor unit
Between Electricity meter to
Touch panel controller
Remarks