Oil Return Switch for NH3 Systems

Technical data: HBOR

HBOR is a liquid level switch designed for automatic Oil return. The sensor measures and detects the difference between the refrigerant and oil in a refrigeration system. Increased security is achieved as the sensor measures when the oil is drained and ammonia surrounds the sensor, the Oil Pot Switch closes the drain valve, without the risk of ammonia being emitted to the surroundings. Used for oil return / discharge of separated oil in e.g. evaporators, receivers and oil pots.  

HBOR is mainly used for the low pressure side of the refrigeration system.

Product features

Proven sensor technology for simple transsistor output PNP/NPN and NO/NC contact function. 

The NO/NC term refers to the state of the contact in "dry" condition, when not influenced by the oil.

Designed for the industrial refrigeration industry - max pressure 100 bar.
Clear indication with LED when oil is detected.
Split design which makes it easy to install and make diagnostic on. The electronic part can be easily disconnected by 2 screws.

Applications

HBOR

Specifications

Connection diagram

hb switches

Drawing

HBSR

Power supply
Voltage24 V AC/DC + 10%
Max current outputMax 50 mA
Current consumption< 10 mA
Plug connectionDIN 43650 - 4 pins
Output
Transistor outputPNP or NPN 
Contact functionNC or NO
Environmental conditions
Ambient temperature-30...+50°C
Refrigerant temperature-60...+80°C*
Max pressure100 bar
Protection degreeIP65
VibrationsIEC 68-2-6 (4g)
Mechanical specifications
Thread connection3/4”
Material - liquid partsAISI 304 / PTFE
Material- electronic partsNylon 6 (PA)
Dimensions210x52x40
Weight300 g
House designFront
Approvals
EMC testEN 61000-2
GOST-RNo 0903044

Ordering code

OutputThread typeOrdering code
PNP / NO3/4" NPTHBOR-PNP/NO-2
PNP / NC3/4" NPTHBOR-PNP/NC-2
PNP / NO3/4" BSPPHBOR-PNP/NO-6
PNP / NC3/4" BSPPHBOR-PNP/NC-6
NPN / NO3/4" NPTHBOR-NPN/NO-2
NPN / NC3/4" NPTHBOR-NPN/NC-2
NPN / NO3/4" BSPPHBOR-NPN/NO-6
NPN / NC3/4" BSPPHBOR-NPN/NC-6
Spare parts for HBOR
Electronic part for HBOR-PNP/NO HBOR-EL/PNP/NO
Electronic part for HBOR-PNP/NC HBOR-EL/PNP/NC
Electronic part for HBOR-NPN/NO HBOR-EL/NPN/NO
Electronic part for HBOR-NPN/NC HBOR-EL/NPN/NC

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