ML4115, ML8115
Fast-Acting, Two-Position
Actuators
FOR FIRE/SMOKE CONTROL APPLICATIONS |
N314 |
The ML4115, ML8115 Fast-Acting, Two-Position Actuators are spring return direct coupled actuators (DCA) with an integral junction box for on/off damper control. The actuator accepts an on/off signal from a single-pole, single-throw (spst) controller. Models are available with clockwise (cw) or counterclockwise (ccw) spring return and are designed to operate reliably in smoke control systems requiring Underwriter’s Laboratories Inc. UL555S ratings up to 350°F.
SPECIFICATIONS
Models:
Model |
Spring Return |
Voltage |
Torque |
Direction |
in Vac |
in lb-in. (N•m) |
|
ML4115A |
ccw |
120 |
30 (3.4) |
|
|
|
|
ML4115B |
cw |
|
|
|
|
|
|
ML4115C |
ccw |
230 |
|
|
|
|
|
ML4115D |
cw |
|
|
|
|
|
|
ML8115A |
ccw |
24 |
|
|
|
|
|
ML8115B |
cw |
|
|
|
|
|
|
Electrical Ratings:
!Power Input:
!ML4115A,B: 120 Vac ±10%, 60 Hz.
!ML4115C,D: 230 Vac ±10%, 50/60 Hz.
!ML8115: 24 Vac +20%, -10%, 50/60 Hz.
!Power Consumption:
!ML4115A,B: Running: 0.18A, 18W. Holding: 0.11A, 9W.
!ML4115C,D: Running: 0.13A, 18W. Holding: 0.10A, 11W.
!ML8115: Running: 16 VA. Holding: 8 VA.
Electrical Connections:
!ML4115A,B, ML8115: Two color coded 16 in. leads; includes ground screw.
!ML4115C,D: 1m appliance cable.
!Three 7/8 in. holes for conduit connections (fittings not included).
Controller Type:
!ML4115A,B: Line voltage (120 Vac), two-position, spst (Series 40).
!ML4115C,D: Line voltage (230 Vac), two-position, spst (Series 40).
!ML8115: Low voltage (24 Vac), two-position, spst (Series 80).
Device Weight:
! 5 lb (2.3 kg).
Noise Rating (Maximum):
!Driving Open: 65 dBA at 1m.
!Holding: 20 dBA at 1m (no audible noise).
SPECIFICATION DATA
FEATURES
•30 lb-in. (3.4 N•m) minimum driving torque at 350°F (176°C).
•Integral spring return ensures level of return torque.
•Stainless steel internal spring.
•Fifteen-second spring return timing.
•No special cycling required during long-term holding.
•No audible noise during holding.
•Patent pending design eliminates need for limit switches to reduce power consumption.
•Models available for 24 and 120 Vac.
•Ninety-five degree angle of rotation.
•Actuator holds rated torque at reduced power level.
•Die-cast aluminum housing.
•Housing design allows flush mounting to damper.
•Integral junction box with three conduit openings eliminates need for separate wiring box.
Temperature Ratings:
!Ambient: 0°F to 130°F (-18°C to 55°C).
!Shipping and Storage: -40°F to 140°F (-40°C to 60°C).
IMPORTANT
The actuator is designed to meet UL555S standards at 350°F (176°C). The actuator must be tested with the damper to achieve this rating.
Humidity Ratings:
! 5% to 95% RH noncondensing.
Stroke:
! 95° ± 3°, mechanically limited.
Torque Rating (at rated voltage):
!Typical Holding (0°F to 350°F): 30 lb-in. (3.4 N•m).
!Typical Driving (0°F to 350°F): 30 lb-in. (3.4 N•m).
!Spring Return: 30 lb-in. (3.4 N•m).
!Stall Maximum: 150 lb-in. (17 N•m).
Timing (At Rated Torque and Voltage):
!Drive Open:
!ML4115: 25 sec maximum, 18 sec typical.
!ML8115: 25 sec maximum, 22 sec typical.
!Spring Close: 15 sec.
Design Life (at Rated Voltage):
! 60,000 full stroke cycles.
Cycling Requirements:
!Prolonged holding period (1 year) testing of these actuators has been performed with no evidence of reduced spring return performance.
Minimum Damper Shaft Length:
! 1-1/2 in. (38 mm).
63-1291—5
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