Refrigerants
The following refrigerants are approved for use with these switches:
- R22, R134a, R404A, R407A, R407C, R407F, R422B, R422D,
- R448A, R449A, R450A, R452A, R507A, R513A, R717*)
For a complete list of approved refrigerants, visit: products.danfoss.com/all-products/
*) Note: R717 is only approved for the MP 55A model.
Installation and Operation
Pressure Connections:
Diagram shows a differential pressure switch with connections labeled P1 (high pressure) and P2 (low pressure). The pressure difference (P1 - P2) is indicated as oil pressure. The switch operates based on this differential pressure.
MP 55 / MP 55A Setting and Reset:
Illustrates the MP 55 / MP 55A model. Features a setting dial for adjusting the pressure difference. Includes a "Stop" function which requires a 2-minute delay before the switch can reset. A reset mechanism is also depicted.
Test Procedure:
Depicts a test setup with a pressure gauge and switch contacts (MO OS). A note indicates relay release time settings, with options for 45 seconds, 60 seconds, 90 seconds, and 120 seconds.
Maximum Operating Temperature:
Indicates a maximum operating temperature of 100 °C (212 °F).
Mounting Torque:
Shows a wrench tightening a connection, specifying a torque of 20 Nm (15.5 ft-lbs).
Connection Method:
Illustrates a connection point, possibly for a sensor or capillary tube, using Silfoss 15 (15% Ag) solder. The maximum length for this connection is specified as 3 mm (1/8 in).
Pressure Specifications:
Displays pressure ratings: PS (maximum system pressure) = 17 bar (245 psig) and MWP (maximum working pressure) = 245 psig. The maximum test pressure (Ptest max.) is 22 bar (310 psig).
Installation Adjustment:
Shows a circular arrow indicating a rotation of 1.5 x 360 degrees, likely for installation or adjustment purposes.
Wiring Diagram:
A wiring diagram is provided, illustrating the electrical connections for the switch.
Importer Information
Importer: TOV zii "Danfoss TOV", 04080, Kyiv 80, p/s 168, Ukraine.
UK Customer Information
Info for UK customers only: Danfoss Ltd., 22 Wycombe End, HP9 1NB, GB.
Danfoss Global Product Store | Homepage
