Description
The Copeland OMB-JB1 (SKU 065365) is a professional-grade compressor crankcase oil level protection control engineered to safeguard commercial refrigeration and HVAC compressors against oil loss — one of the leading causes of compressor failure in the field.
Designed for straightforward installation and reliable long-term operation, this control monitors oil levels continuously and initiates a controlled shutdown sequence before damage can occur. The integrated junction box simplifies field wiring, while the 1/4″ male flare oil supply fitting ensures a secure, leak-free connection to the compressor crankcase.
Key Features
- 24VAC operating voltage for compatibility with standard commercial control circuits
- Integrated junction box for clean, protected field wiring connections
- 1/4″ male flare oil supply fitting for secure crankcase connection
- SPDT alarm switch for flexible alarm circuit integration
- 5–10 second time delay prevents nuisance trips during normal compressor start-up
- 120-second alarm delay time allows transient oil level fluctuations to stabilize before triggering shutdown
- Continuous oil level monitoring to protect against oil loss and compressor damage
- Designed for use with Copeland compressors in commercial refrigeration and HVAC applications
Specifications
- Model: OMB-JB1
- SKU: 065365
- Operating Voltage: 24VAC
- Oil Supply Fitting: 1/4″ Male Flare
- Switch Type: SPDT Alarm Switch
- Time Delay: 5–10 Seconds
- Alarm Delay Time: 120 Seconds
- Includes: Integrated Junction Box
Why Oil Level Protection Matters
Insufficient lubrication is a primary cause of premature compressor failure. The Copeland OMB-JB1 continuously monitors crankcase oil levels and uses a carefully calibrated time-delay sequence — 5 to 10 seconds on startup and a 120-second alarm delay — to distinguish genuine low-oil conditions from momentary fluctuations. When a true low-oil event is detected, the SPDT alarm switch activates, enabling integration with building automation systems, remote alarms, or direct compressor lockout circuits.
Application
- Commercial refrigeration compressor protection
- HVAC system compressor crankcase monitoring
- Compatible with Copeland compressors requiring 24VAC oil level control
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