head temperature within safe and acceptable limits, Self- Diagnostics (Optional) which receives
Operating Status, Alarm and Warning from the E2 Micro Controller Unit and displays these for
easy and rapid trouble-shooting and maintenance and finally Communication Capability that
allows the E2 to dial out to specified numbers via a Dialer Module. Development is in progress to
integrate the E2 Board with the CPC Einstein E2 Control and Monitoring System which will then
enable the ZX to be part of an entire Emerson Climate Technologies Integrated Store
Solution.
Fig 3. The E2 Control Board
2.2 Basic and Optional Configuration
The ZX is marketed with both a Basic configuration and a Basic plus additional Option
Package. The Basic ZX CDU consists of a Chassis, Condenser Coil and Fan/s, Electronic Control
Board (E2 Board + Protective Casing), a ZX Compressor with a Crankcase Heater, Liquid
Receiver with Rotalock Valves, Liquid Injection Electronic Expansion Valve (EXV) with Capillary
Tube, Fixed High Pressure and Low Pressure Switches, a Top Cap Thermistor and lead wire and
Suction and Liquid Service Valves.
The ZX basic and Option Packages both consist of a Liquid Line Assembly,
Condenser Fan Speed Control, Diagnostic Module, Defrost Control Module, Oil Separator,
Adjustable LP switch, Isolating Switch, Buzzer module (supplied loose without cable)
7
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