Kriwan OLC-D1 Oil Level Controller for Bitzer 34794901

Level monitoring The OLC series consists of a screw-in prism unit and an optical level detection device. 

The prism is installed in the compressor or the vessel and is not included with the OLC. 

The level detection device can be replaced without opening to the compressor or the vessel. Detection of the level is via infrared light. 

There is a built-in monitoring system for correct installation. 

Oil level monitoring in compressors The OLC series are used for contactless oil level monitoring in compressors in order to safeguard sufficient lubrication of the internal mechanics. Fluctuation of the oil level in the compressor is common in refrigeration systems for different reasons and therefore oil levels need to be monitored. 

The OLC-K1 starts oil monitoring 90 seconds after compressor start is applied to the violet wire and opens the relay in case of low oil level. 

The OLC-D1 relay opens in case of low oil level and closes when the oil level is reached. 

There is always a minimum 5 seconds delay. Level monitoring in vessels The OLC-D1 is meant for level monitoring in vessels and does not have the operation recognition input, D1. The OLC-D1 opens the relay if the level is too low and closes the relay if the level is valid. 

There is always a minimum 5 seconds delay. Red LED status light When the oil level is too low, the LED will turn on and after approx. 5 seconds the relay will open to signal failure. When the oil level is reached (only OLC-D1), the LED will turn off. After approx. 5 seconds, the LED will turn on for 1 second and then the relay is closed. LED Off: Oil level good, no failures LED On: Oil level low LED flashing: OLC not correctly mounted, or Supply voltage too low, or Internal failure Lock-out state The OLC-K1 will lock-out in case of failure. 

The OLC-D1 will automatically reset and not lock-out. Reset of lock-out state Interrupt power supply for 5 seconds