nVent HOFFMAN 816-10DH

Description

The electronic head pressure control modulates the condenser fan motor speed by varying the air volume through the condenser consequently regulating head pressure for proper heat rejection in low ambient temperature. The control maintains the pressure differential at the expansion valve for proper superheat. It helps preclude evaporator coil freezing and eliminates liquid and oil migration that damages or destroys compressors. The control monitors the head pressure by sensing excessive liquid sub cooling and varies the air volume through the condenser. In other models the fan speed is controlled by a DC input signal. In heat pump installations, the heat pump will override the fan control and allow full speed fan operation.

nVent HOFFMAN Pressure Head Controller, Series: 816, 10 A, 115/208 - 230/460/600 V, 50 - 60 Hz, 1 -Phase, -30 to 160 deg F, 5.56 in L x 3.32 in W x 1-1/4 in H

Features

• Improves system performance while saving energy
• Non-invasive sensor requires no system penetration
• Eliminates compressor slugging (oil migration)
• Sensing is independent of all refrigerant types
• Full voltage start to ensure proper fan rotation
• Cycles fan off after minim flow is obtained
• Simple field calibration
• Microprocessor technology
• 1-control for every application and refrigerant
• A special "range adjust" allows differentiation between TXV and capillary tube/orifice applications for optimum low ambient performance
• Replaces fan cycling controls

Specifications

Documentation