Murphy CNG-92200H User Manual

FWMurphy

Control Systems for

Alternative Fuel

Fueling Stations

CNG-92200H

Revised 08-00

00-02-0149

F

WMurphy has been in the

business of providing
quality controls to the engine,
pump, and compressor market
since 1939. Most of the controls
in use today were pioneered by
Murphy to meet the needs
expressed by OEM’s, packagers
and users. As we move into a
renewed era of environmentally
clean burning Alternative Fuels,

with Compressed Natural Gas
(CNG) leading the way, Murphy
again is out in front with new
control systems. This fast growing
market requires combining the
best of our proven controls with
the innovative SELECTRONIC

®

Micro-Controller™ units. Murphy
engineers are able to provide well
designed systems to meet your
exacting needs.

Our LEVELS I, II, and III control
systems have been engineered to
cover a wide variety of
requirements from simple
start/stop operation of the
compressor and driver to
complete station automation with
remote communication
capabilities. Should these standard
systems or options not cover your
system requirements, these
controllers have the capability to
be expanded or engineered to
meet your needs.

We understand your
requirements, we listen to your
concerns, and most importantly,
we respond. Murphy controls are
known and accepted world-wide,
and they are backed by our
limited 2 year warranty.

All Murphy controls are
designed to live in the harsh
environment of motors,
engines and compressors.
They’re tough for tough
applications. These systems are

designed and built in accordance
with NFPA 52 and NFPA 37
guidelines to meet the area
classification requirements as
defined by the National
Electric Code.

Whether you are upgrading
existing equipment or specifying a
new installation, give your
equipment the Murphy
Advantage. You will add value to
your equipment and gain
increased customer satisfaction.
Specify Murphy LEVEL I, II, or III
SELECTRONIC

®

control systems
for your Alternative Fuels Fueling
Station control requirements.

Continuing a Tradition

1

We understand your
requirements, we listen to
your concerns, and most
importantly, we respond.

NOTE: The features shown for LEVELS I, II, and III are typical for intended applications. Exact configuration and availability of
features may depend upon final system requirements.

LEVEL I is an entry level controller system
designed for the small fueling facility requiring
only basic start and stop of the compressor
and monitoring basic shutdown functions. It
monitors and controls the electric motor
driven compressor and the system loading and
unloading devices.
The LEVEL I controller is an extremely
powerful system, yet user friendly. Its design
incorporates the high technology Murphy
SELECTRONIC

®

Micro-Controller™ series.

Features:

Automatic start and stop control

Operating parameters field adjustable
without reprogramming

Includes hourmeter

Extremely user friendly

Operates load/unload devices

Compatible with stand alone
priority/sequential controls (see below)

NEMA 4, 7, and 9 enclosure

Standard Control Systems for
CNG Fueling Stations

LEVEL I

2

Designed for the small fueling facility...monitoring
and controlling electric motor driven compressor.

The Murphy SELECTRONIC

®

Priority/Sequential Controller
will monitor the Cascade or
other high pressure storage
banks and control the electric
sequencing valves. The Priority
Valves will sequence at operator
selectable levels to fill the

storage on fast fill packages. It
will also monitor the vehicle
dispenser flow rate and
pressure, and will control the

Sequential Valves and Shut-off
Valves to maximize filling the

vehicle in the minimum amount
of time.

Additional Controls

Stand Alone Priority and
Sequential Controller