The Packard PMR575 is a manual reset high pressure control designed to protect refrigeration and air conditioning systems from damaging over-pressure conditions. When system pressure exceeds the control’s set point, the PMR575 opens the circuit and locks out the compressor, requiring a deliberate manual reset before the system can resume operation. This intentional lockout mechanism ensures that a technician investigates and resolves the root cause of the high-pressure fault before the equipment is restarted — preventing repeat compressor trips, refrigerant loss, and costly equipment damage.
Key Features
- Manual reset operation — requires technician intervention after a high-pressure trip for added safety
- Designed to protect compressors in refrigeration and air conditioning applications
- Opens the control circuit on over-pressure events to shut down the compressor
- Durable construction built to withstand demanding HVAC/R environments
- Straightforward wiring and installation for fast field replacement
Applications
- Commercial refrigeration systems
- Residential and light commercial air conditioning equipment
- Heat pump systems
- Compressor protection in split and packaged HVAC units
Why Choose Manual Reset?
Automatic reset controls can allow a system to cycle on and off repeatedly during a fault condition, masking underlying problems and accelerating equipment wear. A manual reset control like the PMR575 forces a positive service action, making it the preferred choice for critical refrigeration loads, commercial installations, and any application where unattended short-cycling poses a risk to equipment or product integrity.
Product Details
- Brand: Packard
- SKU: PMR575
- Control Type: Manual High Pressure Control
