Murphy Network Card AT03069 User Manual

®
AT-04052B  
Revised 04-04  
Replaces AT-98113B  
Catalog Section 40  
(00-02-0567)  
MURPHYMATIC Engine  
Throttle Controller  
Model AT03069  
Automatically adjusts engine speed  
to meet demands of pressure, level,  
load and temperature.  
Speed changes made slowly and smoothly.  
Saves fuel, engine wear, horsepower  
and labor.  
Perfect for warm-up and cool-down on auto-  
mated systems.  
One model for both 12 and 24 VDC systems.  
Temperature  
Description  
Features  
Multi-engine cooling systems.  
Air conditioned chilled water systems.  
The AT03069 can enhance features of our  
SELECTRONIC® Micro-Controller units  
by allowing features such as:  
The AT03069 is a completely reliable heavy  
duty device developed specifically to auto-  
matically control engine speed to meet sys-  
tem demand. Low current, high torque, solid  
state switching and electronic clutch make it  
ideal for all automatic and semiautomatic  
engine systems. Used with the appropriate  
Murphy SWICHGAGE®, near constant  
pressure, level and load can be maintained.  
Check with our engineers for help with  
other applications where speed control can  
improve your system.  
Engine load  
Empty or fill reservoirs with a lower  
horsepower engine—fast when head is  
high—slow when head is low.  
Warm-up RPM Set point.  
Minimum RPM Set point.  
Maximum RPM Set point.  
Preset Operating RPM Set point.  
Specifications  
Auto Throttling To Match Flows  
Voltage: 11-28 VDC negative ground.  
Maximum Current: 500 mA (1/2 amp).  
Standby Current: Approx. 7 mA.  
Increase and Decrease: Inputs float at  
approx. 8.4 VDC. Grounding inputs causes  
8-18 mA of current to flow from either.  
Torque: 25 inch pounds.  
(as needed in flood control applications).  
Maintaining System Pressure (as needed  
in booster station application).  
Adjustable Rate Of Change In RPM  
(allowing fine tuning of overall system).  
Applications  
Pressure  
For more information, recommendations  
and quotations contact our engineering dept.  
City Water Systems.  
Water Flood Injection.  
Sprinkler Lateral Changes.  
Make-up if a “Gang Pump” stops.  
Multiple Hose-reel Irrigation Systems.  
Sealed limit switches: Factory adjusted,  
controls maximum travel.  
Linkage adjustment on lever arm—5 holes:  
Adjusts travel: 1-3/16 in. (30 mm); 1-11/16  
in. (43 mm); 2 in. (51 mm); 2-1/4 in. (57  
mm) approximately.  
Warranty  
A limited warranty on materials and workmanship  
is given with this FW Murphy product. A copy of  
the warranty may be viewed or printed by going to  
Level  
Travel Time: 11 to 20 seconds depending on  
the voltage and force applied.  
Dimensions: See reverse side.  
Water or oil storage tanks.  
Waterflood tanks.  
Sewer disposal systems.  
Flood control catch basins.  
Net Weight: 5 lb. (2.27 kg)  
AT-04052B page 1 of 2  
 

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