Danfoss 060B205491 Pressure Switch
The Danfoss 060B205491 MP55 is a professional-grade oil differential pressure control engineered to protect refrigeration compressors from lubrication failure. As an industry-standard vibration-resistant pressure switch, it monitors the pressure difference between the oil pump discharge and the crankcase. If this differential drops below your defined setpoint, the integrated 45-second thermal time delay relay initiates, allowing for temporary fluctuations during startup before safely shutting down the compressor to prevent catastrophic bearing damage. This model features a wide regulating range of 4.3 to 65 psig and a 36-inch capillary tube for flexible installation in tight mechanical headers. Designed for use with HCFC and non-flammable HFC refrigerants, it provides reliable SPDT contact function and manual reset capability. For technicians servicing multi-compressor racks or standalone condensing units, this Danfoss control is an essential HVACR safety switch for ensuring long-term system reliability.
- Adjustable Differential: Provides a versatile 4.3 to 65 psig setting range to match specific compressor manufacturer requirements.
- Thermal Time Delay: Features a 45-second delay to prevent nuisance tripping during cold starts or transient oil foaming.
- Broad Compatibility: Fully compatible with common refrigerants including R404A, R134a, R407C, and R507A.
- Field-Proven Reliability: Robust bellows design ensures high resistance to system vibrations and mechanical wear.
- Manual Reset: Requires manual intervention after a trip, ensuring a technician inspects the oil system before restarting.
Common Questions
How do I wire the MP55 to the compressor contactor?
The unit uses an SPDT contact system. Typically, terminals L and M are integrated into the control circuit, while terminal S can be used for a remote alarm signal to notify the building management system of an oil pressure trip.
Can this pressure switch be used with ammonia (R717) systems?
No, the 060B205491 is designed for fluorinated refrigerants. For ammonia applications, you must utilize the Danfoss MP 55A series which features stainless steel bellows to prevent corrosion.
What is the purpose of the 45-second delay?
The delay allows the oil pump to establish sufficient pressure upon startup. Without this "buffer" time, the control would trip the compressor immediately before the lubrication cycle could stabilize.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $252.14
-65%$252.14
$88.25Danfoss 060B205491 Pressure Switch
The Danfoss 060B205491 MP55 is a professional-grade oil differential pressure control engineered to protect refrigeration compressors from lubrication failure. As an industry-standard vibration-resistant pressure switch, it monitors the pressure difference between the oil pump discharge and the crankcase. If this differential drops below your defined setpoint, the integrated 45-second thermal time delay relay initiates, allowing for temporary fluctuations during startup before safely shutting down the compressor to prevent catastrophic bearing damage. This model features a wide regulating range of 4.3 to 65 psig and a 36-inch capillary tube for flexible installation in tight mechanical headers. Designed for use with HCFC and non-flammable HFC refrigerants, it provides reliable SPDT contact function and manual reset capability. For technicians servicing multi-compressor racks or standalone condensing units, this Danfoss control is an essential HVACR safety switch for ensuring long-term system reliability.
- Adjustable Differential: Provides a versatile 4.3 to 65 psig setting range to match specific compressor manufacturer requirements.
- Thermal Time Delay: Features a 45-second delay to prevent nuisance tripping during cold starts or transient oil foaming.
- Broad Compatibility: Fully compatible with common refrigerants including R404A, R134a, R407C, and R507A.
- Field-Proven Reliability: Robust bellows design ensures high resistance to system vibrations and mechanical wear.
- Manual Reset: Requires manual intervention after a trip, ensuring a technician inspects the oil system before restarting.
Common Questions
How do I wire the MP55 to the compressor contactor?
The unit uses an SPDT contact system. Typically, terminals L and M are integrated into the control circuit, while terminal S can be used for a remote alarm signal to notify the building management system of an oil pressure trip.
Can this pressure switch be used with ammonia (R717) systems?
No, the 060B205491 is designed for fluorinated refrigerants. For ammonia applications, you must utilize the Danfoss MP 55A series which features stainless steel bellows to prevent corrosion.
What is the purpose of the 45-second delay?
The delay allows the oil pump to establish sufficient pressure upon startup. Without this "buffer" time, the control would trip the compressor immediately before the lubrication cycle could stabilize.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Product Information
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Description
The Danfoss 060B205491 MP55 is a professional-grade oil differential pressure control engineered to protect refrigeration compressors from lubrication failure. As an industry-standard vibration-resistant pressure switch, it monitors the pressure difference between the oil pump discharge and the crankcase. If this differential drops below your defined setpoint, the integrated 45-second thermal time delay relay initiates, allowing for temporary fluctuations during startup before safely shutting down the compressor to prevent catastrophic bearing damage. This model features a wide regulating range of 4.3 to 65 psig and a 36-inch capillary tube for flexible installation in tight mechanical headers. Designed for use with HCFC and non-flammable HFC refrigerants, it provides reliable SPDT contact function and manual reset capability. For technicians servicing multi-compressor racks or standalone condensing units, this Danfoss control is an essential HVACR safety switch for ensuring long-term system reliability.
- Adjustable Differential: Provides a versatile 4.3 to 65 psig setting range to match specific compressor manufacturer requirements.
- Thermal Time Delay: Features a 45-second delay to prevent nuisance tripping during cold starts or transient oil foaming.
- Broad Compatibility: Fully compatible with common refrigerants including R404A, R134a, R407C, and R507A.
- Field-Proven Reliability: Robust bellows design ensures high resistance to system vibrations and mechanical wear.
- Manual Reset: Requires manual intervention after a trip, ensuring a technician inspects the oil system before restarting.
Common Questions
How do I wire the MP55 to the compressor contactor?
The unit uses an SPDT contact system. Typically, terminals L and M are integrated into the control circuit, while terminal S can be used for a remote alarm signal to notify the building management system of an oil pressure trip.
Can this pressure switch be used with ammonia (R717) systems?
No, the 060B205491 is designed for fluorinated refrigerants. For ammonia applications, you must utilize the Danfoss MP 55A series which features stainless steel bellows to prevent corrosion.
What is the purpose of the 45-second delay?
The delay allows the oil pump to establish sufficient pressure upon startup. Without this "buffer" time, the control would trip the compressor immediately before the lubrication cycle could stabilize.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
