Emerson E2 - Manual (Page 152)

11-10 • E2 RX/BX/CX I&O Manual 026-1610 Rev 13 14-SEP-2011
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.
11.4.2 Case Circuit Control Soft-
ware Overview
There are six different versions of case control soft-
ware in the 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-
Output Device
Wire Output
Board contacts
to:
Set Fail-safe Dip
Switch to:
Notes
Case Fans N.C. N.C. (up) Wire fans to remain ON during comm. loss
Refrigeration Sole-
noid N.C. N.C. (up) Wire solenoid to remain energized (OPEN) during comm. loss
Defrost N.O. N.O. (down) Defrost heaters (electric and hot gas) will remain de-energized
(CLOSED) during comm. loss
Liquid Line Sole-
noid (Hot Gas
defrosts only) N.O. N.O. (down) The liquid line solenoid will remain de-energized (CLOSED)
during comm. loss.
EEPR (ESR8 con-
trolled circuits
only) None (ESR8 point) None (ESR8 point) The evaporator stepper regulator valve should be plugged in to a
point on the ESR8 board.
Table 11-6 - Suction Group Outputs