Emerson E2 operation manual EC-2s

2.3.3	EC-2s
Figure 2-20 - EC-2

The EC-2 is an advanced refrigerated case controller that doubles as a temperature and case status indicator. During refrigeration and defrost, the EC-2 controls most typical case functions, including fans, defrost, and a pulse valve on the liquid side of the evaporator to regulate super- heat.

The EC-2 29x version controls the refrigeration sole- noid valve to allow the passage of refrigerant to the TXV valve. The EC-2 39x version controls a pulse valve on the liquid side of the evaporator to regulate Superheat control.

The EC-2 relies on a parent E2 to handle logging, alarm control, defrost scheduling, and other case control functions.

The EC-2 is designed to be mounted on the front of a refrigerated case. The LED display shows the current case temperature with one-tenths of a degree's accuracy. The display can also show alarm codes to immediately notify floor managers of alarms and notices. Other lights on the display show the ON/OFF status of refrigeration, defrost, and fans.

The EC-2 can be easily programmed using either the four front-panel buttons or an optional infrared remote control. For security, the buttons can be disabled to pre- vent tampering.

NOTE: There are several variations of the EC-2. Contact Emerson Retail Solutions at 1- 800-829-2724 for more information.

2.3.4CC-100 Case Controllers and CS-100 Case Circuit Controllers

ACC-100 case control board is a “smart” board capa- ble of controlling all functions for a single case, including lights, fans, defrost, anti-sweat, and suction side or liquid side valve control. CC-100s perform these functions inde- pendently from the E2 RX controllers, but it does rely on a parent E2 for logging, alarming, providing supplemental I/ O values, and coordinating defrost times among circuits.

There are four different models of the CC-100, each of which controls a different type of valve.

1.CC-100P(P/N 810-3160)—Case controller for liquid-side pulse valves (also called electronic expansion valves, or EEVs). This model is capa- ble of controlling up to two pulse valves simulta- neously (for use in dual-evaporator applications such as walk-in boxes).

2.CC-100LS(P/N 810-3170) — Case controller for liquid-side stepper valves (EEVs).

3.CS-100(P/N 810-3177) — Case circuit controller for suction-side stepper valves (also called elec- tronic evaporator pressure regulators, or EEPRs).

4.CC-100H(P/N 810-3171)—A special version of the CC-100 that is used by a particular manufac- turer. This board controls temperature in a case using suction-side stepper valves that regulate pressure in the evaporator.

The CC-100/CS-100 board is shown in Figure 2-21.

Figure 2-21- Case Controller (CC-100P shown)

Echelon Network Boards and Peripherals Hardware Overview • 2-11