Sierra 180 Series Installation Instructions

SAFETY

1. Apply power only after checking the wiring diagrams (on reverse and in Instruction Manual).
2. Apply gas flow only after checking plumbing connections for leaks. Sierra recommends checking for leaks with a
pressure-decay test. As these instruments are NEMA 6 / IP67 rated, a liquid leak detector may also be used.

INSTALLATION

3. Consult the instrument's Data Label (on the rear of the instrument) for ALL proper operating parameters. Note
the orientation as well and install the instrument in this position. If the information on the Data Label does not
match your process conditions, contact your Representative or Sierra Instruments.
4. Install a 10 micron in-line filter upstream of your instrument. If the gas contains any moisture, the moisture must
be removed. Particles larger than 60 microns and moisture may damage your instrument.
5. Mechanical mounting: Flow direction is indicated on the large front label. The weight of the instrument is 10 lbs
(4.5 kg)—be certain it is properly supported. 4 mounting screw holes are supplied on the bottom of the
instrument. 2 are metric M6, 2 are SAE 8-32. See drawing in Technical Data Sheet for details.
6. DO NOT APPLY POWER TO THE OUTPUT LOOP on units equipped and calibrated for a 4-20 mA output signal.
This is NOT a loop-powered device. Damage will occur.
7. If your instrument has the WT option, attach the water-tight cable to the electrical connector on the inlet side.
Connect the wires in this cable per the diagram on reverse. You do not need to open the instrument if you have
ordered the WT option.
8. If your instrument does NOT have the WT option, all electrical connections, including power, are applied via the
terminal strip which is located INSIDE the waterproof enclosure. You may run your wiring into the instrument via
standard conduit (attach to our 1/2" FNPT port) or through our cable gland (option GLAND). Both are located on the
inlet side of the enclosure.
Remove the top section of the enclosure by unscrewing the 4 mounting bolts on the top of the instrument (bolt
a)
size SAE 7/16"). Gently pry the top section off the instrument (not the complete cover, just the top section). Do
not remove the O-ring seal around the perimeter of the enclosure.
If using conduit, run your wires through the conduit, connect the conduit to our 1/2" FNPT port on the inlet side
b)
of the instrument, then pass your wires into the instrument toward the terminal strip (at the top). If using the
cable gland, run your shielded cable with a diameter of 0.20-0.35" (5-9 mm) through the special gland on the
side of the enclosure (cable with a smaller ID may allow liquid to enter the instrument and cause permanent
damage).
Separate your individual wires (16-28 gauge required) and connect to the terminal strip on the top of the
c)
upper circuit board. Wire per the diagrams on reverse". Note that this terminal strip is unique to the 180
Series instruments and different than the description in the 100 Series Instruction Manual.
When wiring is completed, secure the conduit to the enclosure in a watertight fashion or tighten the cable
d)
gland fitting so that it grasps your cable securely. Failure to seal the conduit to the enclosure or to tighten the
fitting can permit liquid to enter the electronic compartment and damage the instrument.
Install the top section of the enclosure taking care not to pinch the O-ring seal or any of your wires. Insert and
e)
tighten the 4 mounting bolts. Failure to install these bolts correctly can permit liquid to enter the electronic
compartment and damage the instrument.

OPERATION

9. Apply the gas listed on the Data Label to the inlet at the recommended pressure (listed on the Data
Label/calibration certificate). Note that all flow controllers are shipped with a zero set point so the valve will not
open until commanded to do so.
10. Apply power per the instructions: 24 Vdc, 600 mA, regulated (500 mA MINIMUM).
11. Apply the control setpoint correctly. Your controller (Model C180) has been factory configured to receive a control
signal (setpoint) in the form defined per your original order. This may be digital (RS -232) or analog (one of 4
choices). You may change the setpoint signal at your facility using the supplied Smart -Trak Software or the
Remote Pilot Module (if ordered). Your setpoint and output choices include 0-5, 0-10 or 1-5 Vdc, 4-20 mA or
digital control (RS-232). See the Instruction Manual for details. Electric connections for RS -232 are on the
terminal strip. If you ordered the Remote Pilot Module, a short cable located under the terminal strip can be
extended to easily connect the Module.
Installation Instructions for
180 Series Mass Flow Controllers