Murphy Series LM300 installation instructions LM301-EX, Specifications, Optional Hose Kit

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Installation Instructions for Level Maintainers

Model Series LM300

Read the following instructions before installing. A visual inspection of this product for damage during shipping is recommended before mounting. These installation instructions are intended for all LM300 series models.

LM-92164N

Revised 10-03

Section 15

(00-02-0176)

GENERAL INFORMATION

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.

LM300: Level Maintainer only (no switches).

LM301: Low switch contacts for low level shutdown or alarm. Four wires, SPDT.

LM302: Two switches for low and high level shutdown or alarm. Four wires, DPST, wired N.O. in normal operating ranges.

LM303: Two switches for low and high level shutdown or alarm. Four wires, DPST, wired N.C. in normal operating ranges.

LM304: Two switches. Alarm before shutdown on low level and shutdown on low-low level. Four wires, DPST, wired N.O. in normal operating ranges.

LM305: Two switches. Alarm before shutdown on low level and shutdown on low- low level. Four wires, DPST, wired N.C. in normal operating ranges.

Specifications

Case/Cover: Die cast aluminum.

Switch Housing: Aluminum.

Approval Rating: LM301 thru LM305 : CSA certified†† for non hazardous locations. Enclosure Type 4 certified.

LM301-EX thru LM305-EX:CSA certified†† for Class I, Groups C and D; Class II, Groups F and G hazardous locations. Enclosure Type 4 certified.

Float: Rigid polyurethane foam. Polyurethane coated.

Maximum Ambient Temperature: 250°F (121°C)

Oil Inlet Connection: Top entry 1/2-14 NPT with built-in filter screen (removable for cleaning).

Inlet Orifices: 1/4 in. (6 mm) standard. 1/8 in. (3 mm) available.

Wire (switch models): 18 AWG x 13 in. (1.0 mm2 x 330 mm).

Maximum Inlet Pressure (MIP):

Max. Differential: 2 in. (51 mm) between running and stationary oil level. 30 psi (207 kPa) [2.07 bar].

with 1/8 in. (3 mm) orifice. 15 ft. oil (4.6 m oil)

with 1/4 in. (6 mm) orifice.

Maximum Case Pressure (MCP): 15 psi (103 kPa) [1.03 bar].

Orifice Seal: Buna-N Thumb-Valve™

Switch Contact: Silver, SPDT snap acting, 10A @ 125, 250VAC; 10A @ 30VDC.

(1 only for low level; 2 only for high & low; or 2 only for low with alarm before shutdown)

LM301-EX

Shown with optional hose kit fittings

**

Patent 5493086

Outlet Connection: 3/4-14 NPT left side, right side, and bottom.

Crankcase Balance Vent Fitting: 1/2-14 NPT.

Mounting: Accepts Murphy pipe mounting or universal mounting brackets.

Lens: Clear “Frog Eye” non-staining, high impact, high temperature nylon; UV and heat stabilized.

Dial: High visibility white background with green and white “index” lines for normal level indication.

Test Knob: Rotate to test switch operation. Turn clockwise for low level test and turn counterclockwise for high level test.

Flow Rate Test: Using SAE 30 @ 32°F (0°C).

Orifice

Pressure

Flow Rates

Diameter

 

 

1/4 in.*

4 ft. oil – 15 ft. oil

4.7 GPH - 31.0 GPH

(6 mm)

(1.2 m oil – 4.6 m oil)

(17.8 LPH - 117.3 LPH)

1/8 in.

10 psig – 30 psig

16.9 GPH - 32.1 GPH

(68.9 kPa – 207 kPa)

(3 mm)

[.69 – 2.07 bar]

(63.7 LPH - 121.5 LPH)

 

 

 

 

 

*Standard

NOTE: Friction losses due to piping NOT considered.

Optional Hose Kit: 15000355

Quantity Description

11/2 in. (13 mm) I.D. x

3 ft. (914 mm) long hose

11 in. (25 mm) I.D. x

3 ft. (914 mm) long hose

21/2 in. (13 mm) worm gear clamp

21 in. (25 mm) worm gear clamp

21/2 NPT x 1/2 in. (13 mm) barbed fitting

23/4 NPT x 1 in. (25 mm) barbed fitting

††CSA certified with switch contacts rated at 10 A @ 250 VAC (standard).

**Products covered by this bulletin comply with EMC Council directive 89/336/EEC regarding electromagnetic compatibility except as noted.

LM-92164N page 1 of 4

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Contents LM301-EX SpecificationsOptional Hose Kit General InformationMounting all LM300 Series models LM300 Series EnclosuresMounting with Universal Bracket Pipe Bracket MountingCrankcase Oil Pan Mounting Connecting Fittings and HosesSwitch Wiring Diagrams WarrantyOperating Ranges of Switches LM301 LM302 LM303 LM304 LM305

Series LM300 specifications

The Murphy Series LM300 is an advanced line of electronic monitoring and control devices, specifically designed for use in industrial and commercial applications. Built to enhance performance and reliability, the LM300 series is an embodiment of modern technology, offering a wide array of features that cater to the operational needs of various sectors.

One of the standout features of the LM300 series is its robust monitoring capabilities. The device is equipped with a high-resolution LCD display that provides real-time data on engine parameters, including temperature, pressure, and RPM. This allows users to gain crucial insights into the performance of their equipment, enabling proactive measures to prevent potential failures and enhance efficiency.

Another key characteristic of the LM300 is its versatile communication options. The series supports multiple protocols, including Modbus and CANbus, allowing for seamless integration with various automation systems. This adaptability ensures that the LM300 can easily fit into existing infrastructures, providing users with greater flexibility and ease of use.

The LM300 series also excels in data logging and alarm functions. It offers extensive data logging capabilities, enabling the collection of historical performance data. Users can set customizable alarms for critical parameters, ensuring that they are promptly alerted to any anomalies that may indicate a malfunction. This feature is particularly valuable in preventing costly downtimes by enabling timely interventions.

Durability and reliability are central to the design of the LM300 series. The devices are built with rugged housings that can withstand harsh environmental conditions, making them ideal for outdoor and industrial applications. Furthermore, the series is tested to meet stringent industry standards, ensuring that customers can rely on the LM300 for consistent performance over time.

Additionally, the LM300 series incorporates advanced diagnostic features that assist in troubleshooting and maintenance. The ability to access diagnostic data directly on the interface simplifies the maintenance process, allowing technicians to quickly identify issues and implement effective solutions.

In summary, the Murphy Series LM300 stands out as a top-tier choice for electronic monitoring and control in challenging environments. With its comprehensive monitoring features, robust communication capabilities, extensive data logging, and high durability, it provides users with the tools necessary to optimize performance and enhance operational efficiency. The LM300 is an exemplary solution for industries looking to leverage technology for improved equipment management and reliability.