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Page 78
– Bulletin 100-50-9.1
6.19 REMOTE DUAL TEMPERATURE WITH EEV AND CIRCUIT EEPR – CONFIGURATION S
The S3C case controller is capable of controlling and monitoring dual temperature, single evaporator refrigerated fixtures
installed as a line-up. The case shown in the diagram below is the lead case of the line-up. In this scenario, one S3C case controller
and one S3C valve module are required. The S3C case controller will control all case functions as well as take all the desired
sensor inputs for one evaporator and drive the EEV. The S3C valve module will drive the EEPR. The typical control method is to
regulate the average line-up discharge air temperature with the EEPR while allowing the EEV to control superheat. The optional
liquid line solenoid (LLS) may be installed as one-per-case or one-per-line-up. In addition, only one case in the line-up (lead
case) needs an EEPR connected to the S3C valve module. Case numbers 2, 3, 4,…n will require their own S3C case controller
but will not have an EEPR connected to them if they share a common suction line with the lead case shown in the diagram
below. Therefore, other cases in the line-up only require the S3C case controller without a S3C valve module. The case is toggled
between its two operating temperatures either via the building automation system (BAS) or with a locally installed physical
switch. When the case controller receives a command to change temperature, the EEPR will either open or close to lower or raise
the case temperature, respectively.
To configure the S3C control package for configuration S
shown above, follow these directions:
If the controller has not been factory set, then upon ini-
tial start-up, the controller will be in set-up mode and the
screen will display
(for self-contained case).
1. Press the
SET
button, then use
▲▼
buttons to scroll
to
o
; press
SET.
This will configure the controller to
support a remote case.
2. Press the
SET
button when
(Rack Identifier)
is displayed. Use the
▲▼
buttons to configure the 4
character Rack Identifier.
Note: Push
▲
button for
numeric,
▼
for alpha characters.
When satisfied
with each digit, press the
SET
button to go to the next
digit. Pressing
SET
multiple times will move to the next
parameter.
3. Press the
SET
button when
ud
(Line-up Identifier)
is displayed. Use the
▲▼
buttons to configure the 4
character Line-up Identifier.
Note: Push
▲
button
for numeric,
▼
for alpha characters.
When satis-
fied with each digit, press the
SET
button to go to the
next digit. Pressing
SET
multiple times will move to the
next parameter.
4. Press the
SET
button when
d
(Case Identifier)
is displayed. Use the
▲▼
buttons to configure the 4
character Case Identifier.
Note: Push
▲
button for
numeric,
▼
for alpha characters.
When satisfied
with each digit, press the
SET
button to go to the next
digit. Pressing
SET
multiple times will move to the
next parameter.
5. Press the
SET
button when
(Application Type) is
displayed. Use the
▲
button and scroll to
du
(Dual
Temperature Case); press
SET.
6. Press the
SET
button when
(Local Stepper Valve
Configuration) is displayed. Use the
▲
button to scroll to
(Electronic Expansion Valve); press
SET.
This is the
valve that is attached to the main S3C Case Controller.
EEV 1
EEPR (CDS)
Compressor Suction
CASE
From CASE #n
Liquid
Liquid Line
Solenoid
(optional)
FIGURE 14 - REMOTE DUAL TEMPERATURE WITH EEV AND CIRCUIT EEPR – CONFIGURATION S