Greenheck ML4202 Installation Manual

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).

Model

ML4202 cw 0.18A, 18W 0.11A, 9W 120 ±10%,

ML4302 ccw

ML4702 cw 0.13A, 18W 0.10A, 11W 230 ±10%,

ML4802 ccw

ML8202 cw 16 VA 8 VA 24 +20%, -10%

ML8302 ccw

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.

Spring Return

Direction

5-Year

Limited

Warranty

INSTALLATION INSTRUCTIONS

Table 1. Models.

Power Consumption

Voltage Input

in VacRunning Holding

60 Hz

50/60 Hz

N314

62-0194-3

ML4202, ML4302, ML4702, ML4802, ML8202, ML8302 FAST-ACTING, TWO-POSITION ACTUATORS

Controller Type:

ML4202, ML4302: Line voltage (120 Vac), two-position, spst

(Series 40).

ML4702, ML4802: Line voltage (230 Vac), two-position, spst

(Series 40).

ML8202, ML8302: Low voltage (24 Vac), two-position, spst

(Series 80).

Accessories:

201391 Shaft Adapter for 3/8 in. shafts (not supplied with

actuator). 205649 Mounting Bracket (not supplied with actuator). 32003532-005 Dual Auxiliary Switch Package for high-

temperature applications.

Table 2. Approvals.

ML4202 ML4302

ML4702 ML4802

ML8202 ML8302

UL/cUL XXX UL873 Plenum Rating, File

XXX

No. E4436; Guide No. XAPX. CE X X C-TICK X

WARNING

Electrical Power Hazard. Line voltage can cause death or serious injury and short equipment circuitry.

Disconnect power supply before installation.

1 (25)

5/8 (17)

6-3/8 (161)

7-1/2

(192)

4 (102)

2 (51) 3-5/16 (84)

1/16 (

7/8 (22)

Fig. 1. ML4202, ML4302, ML4702, ML4802, ML8202,

ML8302 dimensional drawing in in. (mm).

CAUTION

Electrical Shock or Equipment Damage Hazard. Low voltage can shock individuals or short equipment circuitry.

Disconnect power supply before installation.

CAUTION

Equipment Damage Hazard. Tightly securing actuator to damper housing can damage actuator.

Mount actuator to allow it to float along its vertical axis.

CAUTION

Actuator Damage Hazard. Using actuator as shaft bearing causes device damage.

Use actuator only to supply rotational torque. Avoid any side loads to actuator output coupling bearings.

IMPORTANT

1. All wiring must comply with local electrical codes, ordinances and regulations.

2. Voltage and frequency of transformer used with ML8202 and ML8302 must correspond with the characteristics of power supply and actuator.

3. Use wires rated for at least 75°C (167°F).

4. For actuators with a product date code before 0527, a power break of less than two seconds can cause the actuator to spring-return 5 degrees or less and remain in place until a power break of longer duration. For actuators with a product date code of 0527 or after, a power break of any duration will cause the actuator to spring-return and be able to drive immediately when power is reapplied.

62-0194—3 2

( )

M17585A

M17589A

M17588A

24 VAC

( )

120 VAC

( )

230 VAC

( )

RED

BLACK

Fig. 2. Typical 24 Vac wiring.

BLACK

WHITE

Fig. 3. Typical 120 Vac wiring.

BROWN

BLUE

Fig. 4. Typical 230 Vac wiring.

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