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WARNING:
DISCONNECT ALL ELECTRICAL POWER BEFORE CONNECTING ANY WIRES.
LM301
SPDT
Green
Black
Normal
Yellow
Red
Low
Float
Yellow
This section applies only to models that have built-in switches. The illustrations
below and to the right show the dials and their operating ranges of the switches.
If levels are within the designated zones the switch(es) will activate. Notice that
a switch is capable of activating approximately 3/8 in. (10 mm) from the top of
the high zone and 3/8 in. (10 mm) from the bottom of the low zone. The dial in
Figure 9 shows that if level continues to drop into the low-low zone, a
shutdown will occur.
NOTE: Color zones on dial face show approximate normal operating zones.
Actual conditions may vary depending upon operating characteristics of the
engine. Placement of the LM300 according to the above instructions will
compensate for these conditions.
3/4 in.
(19 mm)
3/8 in.
(10 mm)
Figure 7: LM301
A copy of the warranty may be viewed or printed by going to www.fwmurphy.com/support/warranty.htm
FW Murphy
P.O. Box 470248
Tulsa, Oklahoma 74147 USA
+1 918 317 4100
fax +1 918 317 4266
e-mail sales@fwmurphy.com
www.fwmurphy.com
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
SWITCH WIRING DIAGRAMS
LM302
High/Low N.O.
DPST
Green
Black
High
Normal
Low
High
Blue
Normal
Red
Low
Float
OPERATING RANGES OF SWITCHES
Normal
Operating Range
Low Zone
Shutdown or Alarm
A limited warranty on materials and workmanship is given with this FW Murphy product.
CONTROL SYSTEMS & SERVICES DIVISION
P.O. Box 1819; Rosenberg, Texas 77471; USA
+1 281 633 4500 fax +1 281 633 4588
e-mail sales@fwmurphy.com
MURPHY DE MEXICO, S.A. DE C.V.
Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje
San Luis Potosí, S.L.P.; México 78384
+52 444 8206264 fax +52 444 8206336
Villahermosa Office +52 993 3162117
e-mail ventas@murphymex.com.mx
www.murphymex.com.mx
LM303
High/Low N.C.
DPST
Green
High
Normal
Brown
Low
High
Yellow
Orange
Normal
Low
Float
3/8 in.
(10 mm)
3/4 in.
(19 mm)
3/4 in.
(19 mm)
3/8 in.
(10 mm)
3/4 in.
(19 mm)
3/8 in.
1/4 in.
(10 mm)
(6 mm)
Warranty
FRANK W. MURPHY, LTD.
Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.
+44 1722 410055 fax +44 1722 410088
e-mail sales@fwmurphy.co.uk
www.fwmurphy.co.uk
MURPHY SWITCH OF CALIFORNIA
41343 12th Street West
Palmdale, California 93551-1442; USA
+1 661 272 4700 fax +1 661 947 7570
e-mail sales@murphyswitch.com
www.murphyswitch.com
LM-92164N page 4 of 4
LM304
Alarm before
shutdown N.O.
DPST
Green
Normal
Low
Black
Low-Low
Normal
Blue
Low
Red
Low-Low
Float
Figure 8: LM302/LM303
Figure 9: LM304/LM305
MACQUARRIE CORPORATION
1620 Hume Highway
Campbellfield, Vic 3061; Australia
+61 3 9358 5555 fax +61 3 9358 5558
e-mail murphy@macquarrie.com.au
USA–ISO 9001:2000 FM 28221
UK–ISO 9001:2000 FM 29422
LM305
Alarm before
shutdown N.C.
DPST
Green
Brown
Normal
Low
Low-Low
Normal
Orange
Low
Low-Low
Float
High Zone
Shutdown or Alarm
Normal
Operating Range
Low Zone
Shutdown or Alarm
Normal
Operating Range
Low Zone Alarm
Low-Low Zone Shutdown
Printed in U.S.A.
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