Emerson E2 Manuel D’Utilisation

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.

A CC-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.