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Kriwan 22S571 Delta-P2 Differential Pressure Control + DELTA-P 02D555 screw-in part
replaces Bitzer model 34731711
APPLICATION
Monitoring the lubrication system is especially important in refrigerant compressors.
A very reliable method for piston compressors is the KRIWAN differential pressure monitoring.
It consists of two components: the DELTA-P II evaluation part and a separately available screw-in part.
The electronic evaluation part can be mounted or replaced without having to open the refrigeration circuit.
Functional Description of Differential Pressure Control
- The difference between high and suction pressure in the screw-in part influences a moving piston. Its position is measured and evaluated by the installed DELTA-P II evaluation part without contact.
- The differential pressure monitoring is active after expiry of the start-up time after the compressor starts.
- Differential pressure fluctuations are taken into account by an extension of the switch-off times (time integration).
- A lack of differential pressure leads to a locked switch-off. A restart is only possible after a reset.
- The potential-free contact can be looped directly into a safety chain without an additional auxiliary relay.
- The integrated installation check monitors the proper installation.
- An installed LED signals the current status.
DELTA-P screw-in part
The DELTA-P screw-in part is screwed directly into the pump housing, and is connected via internal channels to the suction and high pressure of the oil pump. This eliminates external pipe lines and flare connections.
The screw-in part does not need to be disassembled when mounting or exchanging the evaluation circuitry. The refrigeration circuit remains closed.
Functional Description of DELTA-P screw-in part
The difference between high pressure and suction pressure influences the position of a movable piston.
This is registered by the mounted evaluation circuitry.
Installation instructions of DELTA-P screw-in part
Installation: The maximum torque of the screw-in part is 75Nm and needs to be ensured by a ring spanner or a socket key.
After installation, check for leaks.
