Differential oil pressure switch (relay control lubrication ) Delta PI PII OLS-K1 OPS OPS II I

Electronic oil level regulator Copeland

Electronic relays differential oil pressure "OPS I" and "OPS II"

Differential the oil pressure switch "OPS I" is the alternative solutions Electromechanical relays MR. Unlike MR to connect relay "OPS I do not need to bring a tube with low and high pressure oil, which increases the reliability of the refrigeration unit due there is no risk of leakage of oil and refrigerant in injuries underwater oil tubes. In these relays, the conversion of low and high pressure oil into electrical signals occurs in a compact unit mounted directly in the front cover of a piston compressor with the oil pump.

Coming out of the switch housing wires connect to chain management system of the refrigeration unit. In recent years by the manufacturer of the relay OPS I was done upgrading. For improve the reliability of operation of this device with its housing removed the “Reset” button and moved to the control panel installation. Upgraded relay is marked "OPS II". E differential oil pressure switch have a similar structure and consist of the two mating elements: Site measuring pressure POS. 1, includes two sensor transducer high and low oil pressure. This site is screwed on the lid the front bearing Assembly of the compressor, i.e. directly in the body of his the oil pump. Its built-in sensors are connected through channels with cavities low and high pressure oil pump. The electronic unit, POS. 4, transforming the signal from the sensors. This unit when mounting relay directly screwed on the node with pressure sensors, and can be rotated around its axis by 360°. This design this relay and the sequence of its mounting allows installation and dismantling electronic relay unit without interfering with the cooling the contour. In addition, completely eliminating the need for an external connecting oil tubes and speakers connecting the fittings.

The electronic differential pressure switch oil "OPS I and "OPS II" similar MR. They are designed to work with fluorinated refrigerants.

Relay is activated when the supply voltage at him through the auxiliary contact of contactor the compressor. Red the signal indicator (LED) located on the housing of the electronic unit the relay comes on immediately after starting of the compressor, so it warns about low differential oil pressure. As the compressor output to the settlement mode, i.e. when the differential pressure of the pump reaches a predetermined parameters, the indicator light turns off. In case of a fall of the voltage relay OPS II, poor joining of node electronic unit, and when the malfunction indicator is included in the flashing mode. This light indication allows service installation specialists visually determine the current condition of the relay and the compressor. Output relay contact remains closed when the pressure differential oil will reach or exceed the minimum allowable differential pressure of 0.65 bar. If the differential oil pressure drops below 0.65 bar longer than the delay time 90 sec. relay OPS I will interrupt output pin, i.e., turns off the compressor and is blocked mechanically. Unlock relay differential pressure oil can:

• OPS I - after 3 minutes by pressing the “Reset” button on the switch body,
• OPS II - immediately press for 5 sec. “Reset” button in the control panel installation.

Built-in electronic control unit microprocessor registers even short-term lowering of oil pressure during operation. This the factor also turns off the compressor after the corresponding delay time set oil pressure (time integration).