Emerson E2 operation manual Case Control Circuits, Overview

Output Device	Wire Output Board	Set Fail-safe Dip	Notes
	contacts to:	Switch to:
Case Fans	N.C.	N.C. (up)	Wire fans to remain ON during comm. loss
Refrigeration	N.C.	N.C. (up)	Wire solenoid to remain energized (OPEN) during comm.
Solenoid			loss
Defrost	N.O.	N.O. (down)	Defrost heaters (electric and hot gas) will remain de-ener-
			gized (CLOSED) during comm. loss
Liquid Line Sole-	N.O.	N.O. (down)	The liquid line solenoid will remain de-energized
noid (Hot Gas			(CLOSED) during comm. loss.
defrosts only)
EEPR (ESR8	None (ESR8	None (ESR8	The evaporator stepper regulator valve should be plugged
controlled cir-	point)	point)	in to a point on the ESR8 board.
cuits only)

Table 11-6- Suction Group Outputs

11.4 Case Control Circuits

11.4.1 Overview

Case circuits that use CC-100s, CS-100s, EC-2s, or CCBs for case control rely on Case Circuit Control appli- cations in the E2 to provide them the necessary setpoints, defrost scheduling, and other control parameters. Unlike Standard Circuit applications, Case Control Circuits do not directly control temperature in the case circuits; instead, the case controller controls temperature for each individual case based on the setpoint(s) supplied to them by their associated E2s.

Setup of a case-controlled refrigerated case system is a two-fold process:

1.For each case circuit in the refrigeration system, a separate Case Control Circuit application is cre- ated with its own set of control parameters.

2.Each CC-100, CS-100, EC-2, and CCB is associ- ated with a Case Control Circuit application in the E2. Association creates a network link between the case controller and the application which supplies the information necessary to con- trol temperature, defrost, lights, fans, and anti- sweat heaters.

This section of the manual covers both the program- ming of a Case Circuit Control application and the process of associating a CC-100, CS-100, EC-2, or CCB with a Case Circuit Control application.

11.4.2Case Circuit Control Software Overview

There are six different versions of case control soft- ware in the Emerson Retail Solutions case control family:

•CC-100P - This version controls temperature in a case using a pulse modulated valve, which is pulsed ON for a percentage of a fixed amount of time to achieve the necessary refrigerant flow.

•CC-100LS - This version controls temperature in a case using a liquid-side stepper valve. This valve is capable of various positions in between 0% and 100%. As a result, the CC-100 is capable of supply- ing the exact refrigerant flow necessary to achieve the case setpoint.

•CC-100H - This version controls temperature in a case using a suction-side evaporator pressure regu- lator (EEPR). This valve is capable of various posi- tions in between 0% and 100%. As a result, the CC- 100 is capable of providing the exact suction pres- sure necessary to achieve the case setpoint.

•CS-100 - This controller uses suction-side evapora- tor suction regulators (ESRs) to control suction pressure for an entire circuit. Unlike the CC-100, which controls only one case, the CS-100 controls all cases on an entire circuit.

•EC-2s - The EC-2 is a liquid-side pulse valve case controller that doubles as a case temperature and information display. Unlike the CC-100, it is designed to be mounted on the front of the case, and has a push-button front panel interface for program-

11-10 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013