HONEYWELL NON-SPRING RETURN DAMPER ACTUATOR 20/34 Nm (177/300 lb-in) FOR MODULATING CONTROL Model CN7220A2007 20Nm,24Vac/Vdc, Modulating control, Non-Spring return, Voltage Feedback Signal and without aux. Switch CN7234A2008 34Nm,24Vac/Vdc, Modulating control, Non-Spring return, Voltage Feedback Signal and without aux. Switch GENERAL These direct-coupled damper actuators provide modulating control for: • Air dampers • VAV units • Air handlers • Ventilation flaps • Louvers, and • Reliable control for air damper applications with up to 4.6m2 / 50 sq.ft. (20 Nm / 177 lb-in) or 7.8m2 / 85 sq.ft. (34 Nm / 300 lb-in)(seal- less damper blades; air friction-dependent) FEATURES • New self-centering shaft adapter • Access cover to facilitate connectivity • Declutch for manual adjustment • Mechanical end limits (CN7220 only) • Field-installable auxiliary switches • Rotation direction selectable by switch • Mountable in any orientation (no IP54 if upside down) • Mechanical position indicator SPECIFICATIONS Supply voltage 24 Vac ±20%, 50/60 Hz; 24 Vdc -10...+20% Nominal voltage 24 Vac, 50/60 Hz; 24 Vdc All values stated hereinafter apply to operation under nominal voltage conditions. Power consumption CN7220 6 VA / 6 W CN7234 8 VA / 6 W Ambient limits Ambient operating limits -20...+60 ℃ (-5...+140 °F) Ambient storage limits -40...+80 ℃ (-40...+175 °F) Relative humidity 5...95%, non-condensing Safety Protection standard IP54 as per EN 60529 Protection class II as per EN 60730-1 Overvoltage category II Lifetime Full strokes 60000 Repositions 1.5 million Mounting Round damper shaft 10…27 mm (3/8...1-1/16”) Square damper shaft 10...18 mm (3/8...11/16”) 45° steps Shaft length min. 22 mm (7/8”) Control signal 0(2)...10 Vdc 0(4)...20 mA Input impedance 100 kΩ [0...10 V] 500 Ωm [0...20 mA] Feedback signal Limits ± 1 mA at 0...10 V Torque rating CN7220 20 Nm (177 lb-in) CN7234 34 Nm (300 lb-in) Runtime 95 sec (60 Hz) / 110 sec (50 Hz) Rotation stroke 95°± 3° Dimensions see “Dimensions” on page 6 Weight 1.35 kg (3 lbs.) Noise rating 40 dB(A) max. at 1 m
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