Murphy EL150EX - Manual

L-7758N page 1 of 4
Installation Instructions for L150, EL150K1, and
EL150EX Level SWICHGAGE
® s for Engine Liquids
L-7758N
Revised 06-00
Section 15
( 00-02-0171)
Description
The L150, EL150K1 and EL150EX Level SWICHGAGE ® instruments are
a combination liquid level gauge and low limit switch. Each unit includes a
float chamber, an indicating pointer, a dial, and a low level contact. When
properly installed and maintained, the float operates the pointer which, in
turn, both indicates level during normal operation, and closes a switching
circuit if the level falls to the low-limit set point.
Applications
The primary use of these level SWICHGAGE ® instruments is for engine
cooling systems, surge or expansion tanks, condenser radiator or vapor
phase systems, whether pressurized or atmospheric. These instruments can
also be used to monitor lube oil, hydraulic fluid or diesel fuel reservoirs and
activate alarms and/or shutdown at a predetermined minimum level.
These instruments are built for low pressure systems.
Cold Weather Warning
BEFORE FREEZING WEATHER COMES, CHECK TO BE
SURE YOUR L150 OR EL150 SERIES COOLANT LEVEL
SWICHGAGE
® IS FILLED WITH ANTIFREEZE SOLUTION
THE SAME AS YOUR ENGINE BLOCK AND RADIATOR. On many
engines, such as condenser radiator systems, the coolant in your level
SWICHGAGE
® remains static until the level falls to drain point. When
‘winterizing’ it’s a good idea to make certain all water drains from your level
SWICHGAGE
® , to check against clogged connections, and then BE SURE IT
REFILLS WITH ANTIFREEZE. FAILURE TO OBSERVE THIS
PRECAUTION COULD RESULT IN EQUIPMENT DAMAGE.
Please read the following instructions before installing. A visual inspection for damage during shipping is recommended
before mounting. It is your responsibility to have a qualified person install the unit.
GENERAL INFORMATION
L150 EL150EX
Float
• Brass
• •
• Stainless Steel (AISI 304) •
Electrical Connection
• (1) 16 AWG x 24 in. (1.5 mm
2 x 610 mm)
•
with terminals.
• (3) 18 AWG x 14 in. (1.0 mm 2 x 356 mm) •
• Terminal Block •
CSA Listed for Hazardous Location:
Class I , Division 1, Groups C & D.
•
O-Rings: Saturated Nitrile, suitable for coolant or
hydrocarbons. Maximum temperature • • •
250°F (120°C)
Cover Gasket
• Neo-cork
• •
• Buna •
Case
• Die cast aluminum, polyurethane coated
• •
• Sand cast aluminum, painted.
•
Specifications
Lens
• Polycarbonate
• •
• Tempered glass •
Contact Rating
• Pilot duty 2 A @ 30 VAC/DC resistive SPST
•
• SPDT rated 10 A @ 125 VAC; 0.5 A @ 125 VDC;
10 A @ 30 VDC
• •
Maximum Working Pressure:
• • •
25 psi (172 kPa) [1.72 bar]
Vent Tube: 1/4 x 5 in. (6 x 127 mm) with fittings. • • •
WARNING
BEFORE BEGINNING INSTALLATION OF THIS MURPHY PRODUCT
✔
Disconnect all electrical power to the machine.
✔
Make sure the machine cannot operate during installation.
✔
Follow all safety warnings of the machine manufacturer.
✔
Read and follow all installation instructions.
L150
EL150K1
**Products covered by this literature comply with EMC Council directive 89/336/EEC regarding
electromagnetic compatibility except as noted.
**
CAUTION: Certain danger to human and to equipment
such as applied in a mobile or marine application may occur
if some equipment is stopped without pre-warning. It is
therefore, recommended that monitored functions be limited
to alarm only or to alarm before shutdown in such applications.