J52 Refrigerant

Level Switches

Instruction Manual and Parts List

DESCRIPTION

refrigerant level control for applications with commercial

refrigerants including Ammonia, Freon, Methyl Chloride,

and Sulphur Dioxide. Usage may include level alarm and/or

pump control service on liquid accumulators or receivers.

MODEL IDENTIFICATION

OPERATING PRINCIPLE

Figures 1 and 2 illustrate the simple and foolproof

Magnetrol operating principle. Switching action is obtained

through the use of a magnetic attracting sleeve, actuated

by a float, and a switching mechanism. These two basic

component assemblies are separated by a non-magnetic,

pressure tight enclosing tube. The switch and magnet are

assembled to a swinging arm which operates on precision

stainless steel pivot sockets.

OPERATING CYCLE

At “Normal Operating Level” of liquid in the chamber

(Figure 1), the float moves the magnetic attracting sleeve up

the enclosing tube and into the field of the switch mecha-

nism magnet. As a result, the magnet is drawn in tightly to

the enclosing tube causing the switch to actuate, “making”

or “breaking” an electrical circuit. As liquid level recedes,

the float pulls the magnetic attracting sleeve downward

until, at a pre-determined “Low Level” (Figure 2), the switch

magnet releases and is drawn outward away from the

enclosing body of the tube by a tension spring. This in turn

deactuates the switch. When liquid level returns to normal

(Figure 1), the float once again moves the magnetic attracting

sleeve up at the enclosing tube, causing the switch to

assume its original position.

Pivot

Return

Spring

Magnet

Float

Dry Contact Switch

Enclosing Tube

(non-magnetic)

Attracting Sleeve

(magnetic)

Normal Operating Level

Falling Level

Figure 1

Figure 2

Housing

Switch

Connection

3

3

NEMA 4X

Dry Contact

J52-4101-002

J52-4111-002

NEMA 4 Lexan Dry Contact

J52-4107-004

—

NEMA 4X/7/9

Dry Contact

J52-4102-002

J52-4112-002