Page 4
– Bulletin 100-50-5.2
2. Setup
Enter values for four basic system variables; refer to Appendix
A - Setup Menu,
page 9. The EEV is closed upon startup and
the system will not operate until completing setup.
Once powered up, the controller will display the firmware
versions for the display and the controller. It will then display
the first variable to set.
1. Set
StEP
, Step Motor Stroke. Press and then turn the
SELECT knob to select the correct number of steps for
the EEV being used. See Table 2 for a list of Sporlan
EEVs. Default is 2500. Press the SELECT button again
to enter the value. The next variable is displayed.
2. Set
reFr
, Refrigerant. Select the actual refrigerant used
in the system (the refrigerant feeding the EEV), follow-
ing the steps above. Default is R-404A.
CAUTION: Select the actual refrigerant used in
the system.
3. Set
Pt4P
, Pressure Sensor Type. Select Absolute or
Gauge, following the steps above. Default is Gauge
(sealed).
4. Set
Prng
, Pressure Sensor Range. Select 150, 300, or
500, following the steps above. Default is 300.
5. Once setup is complete, the display will alternate
between
LovT
and the actual Liquid Outlet Temperature.
After the system is in operation, verify that the Liquid
Outlet Temperature Setpoint,
LoSP
, is met. Default is 75
degrees.
NOTE: If using a 3K temperature probe (or if unsure which
probe you are using) refer to Appendix E, page 11, and
follow the instructions to set the controller to the correct
probe profile. Images of 2K and 3K probes are shown in
Figure 8, page 16.
3. Setpoint Menu Operation
Make final setpoint changes; refer to Appendix E - Setpoint
Table 2 - Sporlan Electric Expansion Valves
SPORLAN MODEL NUMBERS
STEPS
SEI-.5, SEI-1, SER-1.5, SEI-2, SEI-3.5, SEI-6,
SER-6, SEI-11, SER-11, SER-20
1596
SER-AA, SER-A, SER-B, SER-C, SER-D,
SERI-F, SER-G, SER-J, SER-K, SER-L
2500
SEI-30
3193
SEI-50, SEH-100, SEH-175
6386
NOTE: Sensor leads may be extended to 100 ft.
(30.5m) with 18 awg wires and scotchlok (TM) UR
connectors for long-term integrity.
CONTROLLER
TERMINAL
OLD PIGTAIL
LEADS
NEW HERMETIC
CABLE
+
35
Red
Black
S
33
Green
White
–
34
Black
Green
Table 1 - Pressure Transducer Wire Colors
Parameters,
page 11. The noted values are for verification;
change them if necessary. All other values are for informa-
tional purposes.
NOTE: The Parameter Menu times out after 60 seconds
of inactivity and you will lose all changes entered.
1. Enter the Parameter Menu: Press and hold the SELECT
knob for 5 seconds. Rotate the knob to enter the pass-
word “
111
” and press the SELECT knob again.
2. To change a parameter, rotate the SELECT knob to the
desired parameter and press the SELECT knob. The
default value will display.
3. Turn the SELECT knob to change the value and then
press the SELECT knob to enter the value and return to
the Parameter Menu.
4. After all parameters are set, turn the SELECT knob to
“
ESC
” and press the SELECT knob to save all changes.
Observe the system for subcool operation. See Appendix
O - System Flowchart
, page 22.
The system is now operational. See Appendix B - Process
Values,
page 10, for the variables that the Subcool Control
monitors.
4. System Operation
The Sporlan Subcool Control uses an interactive control
scheme for Subcooling and Superheat operation. The con-
troller optimizes the use of the heat exchanger based on the
demand of subcooling loads.
If a third party or master controller is connected to the liquid
line solenoid or suction stop valve, a digital input must be
connected to terminals 25 and 26. This input allows the con-
troller to respond to major flow variations upstream or down-
stream of the subcool control EEV (e.g. ). Closing or shorting
these terminals (when the liquid line solenoid or suction stop
valve closes) places the controller into pumpdown mode and
closes the subcool EEV. During this time, the controller will
shut down the control scheme and prepare for restart. This
ensures maximum control efficiency and system stability.
Two features of the controller allow enhanced operation
as compared to previous subcooling methods.
The first feature is
SboF
(Subcooler Off Temperature Differ-
ential). The
SboF
is set as the minimum differential tem-
perature above the
LoSP
(Liquid Outlet Temperature Control
Setpoint). When ambient conditions provide a reduced con-
densing temperature and the need for subcooling has dimin-
ished, the Subcool Control can be turned off. The optional
liquid inlet temperature sensor measures the liquid drop leg
temperature. At temperatures below
SboF
+
LoSP
, the control-
ler will go into pumpdown mode and close the subcool EEV.
The control status will read
OfF
. The controller will switch
back to the subcooling mode when the liquid temperature rises
5°F above the differential temperature (
LoVt
+
SboF
+ 5
o
F).
The second feature,
rGhL
(Return Gas High Limit), limits the
temperature of the superheated refrigerant returning to the
