Active Watt-Hour Meter; Outdoor Centralized Controller; Function Of Watt-Hour Meter; Requirements On Watt-Hour Meter - York R-410A Technical & Service Manual

Controller
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2.2 Outdoor centralized controller

2.2.1 The controller enables centralized control over and data query of the outdoor units. Each
controller can form a monitoring and controlling network with up to 32 outdoor units through a
network interface module. Wired connection is used for communication and to enable
centralized control over outdoor units in the network.
2.2.2 The controller can communicate the computer via RS485/RS232 transformation interface.
Each computer can connect with 16 outdoor centralized controllers and 16 indoor centralized
controllers. The computer enables central control over, management, status query, etc of the
outdoor centralized controllers, indoor centralized controllers, indoor units and outdoor units
within the monitoring and controlling system.
2.2.3 For communications between controllers and outdoor units, as well as between computers
and controllers, the primary machine queries and the secondary machine replies. In the
monitoring and controlling network consisting of controller and outdoor units, the controller is
the primary machine, while the outdoor unit is the secondary machine.

3) Active watt-hour meter

3.1 Function of watt-hour meter

It is used to measure the electricity consumption of each outdoor unit.

3.2 Requirements on watt-hour meter

3.2.1 The system requires installation of watt-hour meter capable of reading via 485
communication interface and satisfying DL-T645-1997 standards (national standard watt-hour
meter regulations)
3.2.2 The watt-hour meter shall conform to the relevant national technical standards and be
confirmed by the power supply authorities.
3.2.3 The watt-hour meter shall conform to the technical requirements of GB/T1725-2002: Grade
I and Grade II Static AC Active Watt-Hour Meters.
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3.2.4 Installation site: Specified work temperature：-25 C～+55 C
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Scope of work temperature：-40 C～+70 C Relative humidity：<85%
3.2.5 Wiring of watt-hour meter shall be referred to the wiring nameplate supplied with the
watt-hour meter.
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