Bulletin 100-50-9.1 –
Page 23
5.9.3 LIQUID LINE SOLENOID VALVE
5.9.3.1 MOUNTING
An optional normally closed AC solenoid valve may be
installed in the liquid line feeding each EEV. The liquid line
solenoid valve will ensure safe shutoff of refrigeration flow
during power loss. Install the valve using standard brazing
practices. Refer to Sporlan’s valve installation instructions
available at www.sporlan.com. Use only Sporlan solenoid
valves. Bulletin 30-10 may be used for capacity and sizing.
For cut-in/cut-out temperature control, a solenoid valve is
required.
5.9.3.2 WIRING
With power off, wire the line leg of the solenoid valve in
series with the S3C controller. Ensure the terminal screws on
the controller are backed all the way out. Insert the leads of
the sensor wire into “Sol/Pulse” location on the controller.
Tighten the terminal screws to 3-5 in.-lb. Carefully tug the
leads to ensure they are secure. See the following figure.
Note: The solenoid valve must be externally powered.
5.9 VALVES
5.9.1 ELECTRONIC EXPANSION VALVE (EEV)
5.9.1.1 MOUNTING
The EEV must be installed at the inlet to the evaporator
using standard brazing practices. Refer to Sporlan’s valve
installation instructions available at www.sporlan.com. For
best performance, use only Sporlan EEVs. Bulletin 100-20
may be used for capacity and sizing. EEV location, sizing
along with distributor nozzle sizing is important to proper
system performance.
5.9.1.2 WIRING
The EEV may be wired to the S3C Case Control or the S3C
Valve Module depending on final system configuration. The
valve cable color code must match the code written on the
controller.
5.9.2 ELECTRONIC EVAPORATOR PRESSURE
REGULATOR
5.9.2.1 MOUNTING
The EEPR may be installed as a circuit control or individual
case control. For circuit control, the EEPR must be located
in the suction line after the last case on the line-up. The
valve may be installed in the conditioned space or outside
of the space. If mounted on the outside of the space, it
is recommended to insulate the exterior of the valve to
eliminate sweating. For individual case control, mount the
EEPR in the case after the evaporator. Ensure that the EEPR
is positioned after the pressure and temperature sensors
used for superheat calculation. In both instances, install the
valve using standard brazing practices. Refer to Sporlan’s
valve installation instructions available at www.sporlan.
com. For best performance, use only Sporlan EEPRs.
Bulletin 100-40 may be used for capacity and sizing.
5.9.2.2 WIRING
The EEPR may be wired to the S3C Case Control or the S3C
Valve Module depending on final system configuration. The
valve cable color code must match the code written on the
controller.
Valve Cable
Case Control
or Valve Module
Black
B
White
W
Green
G
Red
R
Valve Cable
Case Control
or Valve Module
Black
B
White
W
Green
G
Red
R
