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Honeywell Damper Actuators ML7294A1009/U, ML7294A1025/B

Honeywell ML7294 non-spring return direct coupled actuators provide proportioning control of dampers or valves in HVAC applications. It uses a current or voltage signal from an electronic controller to position a damper or valve at any point between fully open/closed.

ML7294A1009/U

2-10 Vdc Actuator-300 lb-in, Non-Spr Ret

Overview

Honeywell ML7294 non-spring return direct coupled actuators provide proportioning control of dampers or valves in HVAC applications. It uses a current or voltage signal from an electronic controller to position a damper or valve at any point between fully open/closed.

Features

 

  • Mount on 1/2- to 3/4-in. round or square shafts; moutn on 1-in. round shafst with appropriate 1-in. insert
  • 300 lb-in. (34Nm) torque
  • Magnetic coupling eliminates mechanical stops or limit switch adjustments by limiting stall torque; nominal stall torque at room temperature of 68F (20C) is 410 lb-in.
  • Ninety-five degree stroke compresses rubber/neoprene gaskets on 90 low leakage dampers
  • Declutch features allows manual adjustment
  • 165-second synchronous timing eliminates need for feedback position indication in closed-loop temperature control applications
  • Standard reverse/direct acting rotation switch on outside cover
  • Both single-point and three-point mounting capatibility
  • Models available with 2-10 Vdc and 4-20 mA inputs; models available with 2-10 Vdc feedback signal

 

Product Specifications

Application
HVAC
Dimensions (in.)
8.46 in high x 4.01 in wide x 3.15 in deep
Dimensions (mm)
215 mm high x 102 mm wide x 80 mm deep
Includes
Mounting bracket, hub insert for 1.06 in. square/round shaft
Weight (lb)
5.4 lb
Weight (kg)
2.45 kg
Materials
Plenum rated plastic housing
Comments
Integral 1/2 in. conduit connection.
Mounting
Direct Coupled
Frequency
50 Hz; 60 Hz
Approvals, Underwriters Laboratories Inc.
UL873, Plenum Rated
Electrical Connections
20 AWG color-coded cable
Operating Humidity Range (% RH)
5 to 95% RH, non-condensing
Supply Voltage
24 Vac ±20%
Power Consumption
Driving-- 6 VA
Shipping and Storage Temperature Range (F)
-30 F to +150 F
Shipping and Storage Temperature Range (C)
-35 C to +65 C
Approvals, Canadian Underwriters Laboratories Inc.
cUL C22.2 No. 24-93
Ambient Temperature Range (F)
-40 F to +140 F
Ambient Temperature Range (C)
-40 C to +60 C
Environmental, Electrical or Ingress Protection Rating
NEMA 1
Internal Auxiliary Switch
0
Maximum Noise Rating
Driving (dB(A) @ 1m)-- 45
Stroke
95 ±3 degrees
Shaft Dimensions (in.)
1/2 to 1 in. round or 1/2 to 3/4 in. square
Actuator Type
Damper
Control Signal
2-10 Vdc (4-20 mA w/500 ohm resistor)
Fail Safe Mode
Non-Spring Return
Torque Rating (lb-in.)
300 lb-in.
Torque Rating (Nm)
34 Nm
Additional Torque Ratings (lb-in.)
Maximum Stall-- 495 lb-in.
Additional Torque Ratings (Nm)
Maximum Stall-- 56 Nm
External Auxiliary Switches Available
No
Rotation to Open
By switch
Timing, Nominal
Driving @ 60 Hz-- 165 sec ±3
Feedback
2-10 Vdc
Shaft Adapter Type
Fixed size Hub, two set screws
Manual operation
Declutch mechanism
Shaft Dimensions (mm)
13 to 25 mm round or 13 to 19 mm square
Input Impedance
100K ohm
Electrical Connections (in.)
36 in.
Electrical Connections (mm)
0.9 m

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