Honeywell ML8302 - Manual

5-Year

Limited

Warranty

INSTALLATION INSTRUCTIONS

62-0194-3

N314

ML4202, ML4302, ML4702, ML4802,

ML8202, ML8302 Fast-Acting,

Two-Position Actuators

FOR FIRE/SMOKE CONTROL APPLICATIONS

APPLICATION

The ML4202, ML4302, ML4702, ML4802, ML8202, ML8302

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.

APPLICABLE LITERATURE

— Motor/Actuator Selection Guide

for Damper Applications

63-8419

— Engineering Manual of Automatic Control

(also called The Gray Manual)

77-1100

— Direct Coupled Actuator

Quick Selection Guide

63-8553

— Damper Torque Calculator

63-8437

SPECIFICATIONS

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.

Models:

See Table 1.

Dimensions:

See Fig. 1.

Minimum Damper Shaft Length:

1-3/4 in. (45 mm).

Device Weight:

5 lb (2.3 kg).

Stroke:

95° ± 3°, mechanically limited.

Electrical Ratings:

See Table 1.

Electrical Connections:

Two color coded 16 in. leads; includes ground screw.

One 7/8 in. hole for conduit connections (fittings not included).

Mounting:

3/8 to 1/2 in. square or round damper shafts.

Actuator can be mounted with shaft in any position. Secure

hub to shaft with: Two 1/4-28 UNF set screws. Use 1/8 in.

Allen wrench to tighten set screws.

IMPORTANT

Honeywell does not recommend using linkages with

these actuators because side-loading of the output

hub reduces actuator life.

Ambient Ratings:

Operating Temperature: 0 to 130°F (-18 to 55°C).

Shipping/Storage Temperature: -40 to 140°F (-40 to 60°C).

Humidity: 5% to 95% rh, noncondensing.

Torque Rating (at rated voltage):

Typical Holding: 100 lb-in. (11.3 N•m).

Stall Maximum: 150 lb-in. (17 N•m).

Spring Return: 20 lb-in. (2.2 N•m).

350°F Driving: 20 lb-in. (2.2 N•m).

Design Life (at Rated Voltage):

60,000 full stroke cycles.

Noise Rating (Maximum):

Driving Open: 65 dBA at 1m.

Holding: 20 dBA at 1m (no audible noise).

Table 1. Models.

Cycling Requirements:

Prolonged holding-period (1 year) testing of these actuators

has been performed with no spring return failures. The

actuator and the internal spring are designed to require no

special cycling during long-term holding.

Honeywell recommends following all local, state and national

codes for periodic testing of the entire smoke control

system. Refer to National Fire Protection Association

(NFPA) National Fire Codes®: NFPA90A, NFPA92A and

NFPA92B for your application.

NFPA recommends periodic examination of each fire/smoke

damper (semi-annually or annually) to ensure proper

performance.

Timing (At Rated Torque and Voltage):

Drive Open:

ML4202, ML4302, ML4702, ML4802: 25 sec maximum,

18 sec typical.

ML8202, ML8302: 25 sec maximum, 22 sec typical.

Spring Close: 15 sec.

Environmental Protection Ratings:

NEMA1.

Approvals:

See Table 2.

Model

Spring

Return

Direction

Power Consumption

Voltage Input

in Vac

Running

Holding

ML4202

cw

0.18A, 18W 0.11A, 9W

120 ±10%,

60 Hz

ML4302

ccw

ML4702

cw

0.13A, 18W 0.10A, 11W 230 ±10%,

50/60 Hz

ML4802

ccw

ML8202

cw

16 VA

8 VA

24 +20%, -10%

50/60 Hz

ML8302

ccw