1 CCM-270A/WS
201807 41
Installation & Commissioning
1.15 Energy Meter Installation
To use the “ECS” function of the CCM-270A/WS, the energy meter should be connected to the outdoor units to monitor
the energy consumed by the outdoor units which can be sent to the software and hence it can be used by the software to
calculate the energy consumed by various tenants.
Two models of energy meter are available from Midea, which are listed as follows:
1.15.1 Wiring Instructions
At present there are two kinds of energy meter wiring schemes in engineering:
1. A refrigerant system can be connected to three-phase digital power meter of low current only used by Midea (can
connect to the external current transformer). The external current transformer power meter can be installed directly
on the power of the air conditioner system bus, implement a refrigerant system with one meter.
three-phase digital power
(380V,50Hz,6A)(CHINT)(RoHS)
current transformer (150A/5A)
2. An outdoor unit connects to three-phase digital power meter of large current, at present there are two kinds of
meter in using, details are as follows:
three-phase digital power meter
(380V,50Hz,100A)(RoHS)
three-phase digital power (60A)(RoHS)
3. The wiring between current transformer and power meter
The power meter installed is DTS634-M. In the wiring diagram, the 1, 4 and 7 ports of the power meter need to connect to
current transformer’s S1 terminal; the 3, 6 and 9 ports of the power meter need to connect to current transformer’s S2
terminal. The 2, 5 and 8 ports of the power meter need to connect to three-phase power supply. The 10 and 11 ports of
the power meter need to connect to ground. In sure to safety，it’s necessary to connect current transformer’s S2
terminal before connecting the ground.
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