Hoffman Controls 880-90 Applications:
- ECM (brushless dc) Motors
- Variable Frequency Drive (VFD) Motors
Hoffman Controls 880-90 Features:
- Improves system performance while saving energy
- Non-invasive sensor requires no system penetration
- Eliminates compressor slugging
- Sensing is independent of all refrigerant types
- 90mA motor drive capability modulates up to nine typical ECM motors.
- Selectable motor drive output options include adjustable 13-17Vdc peak 80Hz PWM, 0-10Vdc or 10-0Vdc (fail safe) signals.
- Monitor up to three liquid line 10K sensors or up to three selectable pressure transducers with the hottest sensor or highest pressure transducer controlling motor operation.
- Available 0-10Vdc control signal input.
- Adjustable LOW & HIGH temperature, pressure or Vdc set points.
- Pressure input calibrated to accept 0.5-4.5Vdc, 500psi ratiometric pressure transducer. Pressure transducers are market available.
- 24Vdc activated selectable Direct or Reverse acting Heat Pump mode.
- Hard start, self test, set point and motor modulation LED indicator.
- Temperature sensors and pressure transducers not included. 10K temperature sensors are available from Hoffman Controls.
- Commercial A/C
- Computer rooms
- Grocery and convenience stores
- Frozen food storage
- Humidity or temperature sensitive environments
- Cooling tower fans, glycol coolers
- Liquid heat exchangers