Tjernlund Constant Operating Pressure Control For CDB8

The COP2DB is a Constant Operating Pressure Control that incorporates a 120/1/60 Variable Frequency Drive. It modulates the speed of an exhaust fan to maintain a user adjustable negative pressure set point. Use only with Tjernlund Products’ model CDB8 Booster Fan. Pressure is measured in dryer duct at the farthest point from the exhaust fan inlet with the included pressure transducer and sensing tube kit. As exhaust volume increases within the duct, the resulting reduction in measured pressure causes the COP2DB control to increase voltage & frequency to the fan. It speeds the fan up to handle the additional exhaust volume and slows it down when the exhaust volume is reduced, modulating fan speed to maintain optimal dryer exhaust velocity. Changes in wind, temperature and building pressure are automatically compensated for. Product Features Dip switch adjustable exhaust pressure set point: -0.05” WC to -0.53” WC in 0.01” WC increments. Dip switch adjustable acceleration speeds: Fast/10 Seconds, Medium/20 se...