Schneider Electric MK2-3000 Series, MK4-3000 Series Data Sheet

Page 1

APPLICATION

Proportional pneumatic actuator with 8 in.2 (52 cm2) effective area used to control dampers, mixing boxes, air valves, etc., in heating, ventilating and air conditioning systems, MK2-31X1 used for high temperatures.

SPECIFICATIONS

Construction:

Housing, Die cast aluminum. Diaphragm, Beaded molded neoprene. MK2-31X1 only -

Beaded molded silicone.

Stroke: See Table 2. Start Point: Adjustable on most models ± 1 psi, see T a ble 2. Spring: Retracts actuator shaft on loss of air pressure. Maximum Air Pressure: 30 psig (207 kPa). Ambient Temperature Limits:

Shipping, -40 to 160°F (-40 to 71°C). Operating, -20 to 160°F (-29 to 71°C).

MK2-31X1 only,

Shipping, -40 to 250°F (-40 to 121°C). Operating, -20 to 250°F (-29 to 121°C), for 30 minute

exposure 450°F (232°C).

Air Connections: 1/8” FNPT. Mounting: In any position. Mounting bracket (except

MK-3300 Series end mounting) and connector for 5/16" (8 mm) diameter push rod included with actuator. Dimensions: 12" high x 5-7/8" wide x 5-1/2" deep (305 mm x 143 mm x 140 mm)

ACCESSORIES

AK-42309-500 Positive positioner and linkage, do not use with AM-111 Crank arm for 5/16" diameter damper shaft

AM-112 Crank arm for 3/8" diameter damper shaft AM-113 Crank arm for 1/2" diameter damper shaft AM-115 Crank arm for 7/16" diameter damper shaft AM-122 Linkage connector straight type AM-123 Damper clip AM-125 5/16" x 20" damper rod AM-125-048 5/16" x 48" damper rod AM-132 Ball joint connector AM-161-3 Damper linkage kit AM-301 90° mounting bracket for pivot mounting AM-530 Crank arm for 1/2" diameter damper shaft holes

AM-532 Bolt-on frame lug and damper blade clip kit AM-533 Actuator shaft extension AM-534 Pivot stud for pivot mounting AM-535 Clevis for pivot mounting AM-536 Mounting plates for pivot mounting on ducts or

AM-545 Rod end connector for 5/16" (10 mm) dia. rods TOOL-95 Pneumatic calibration tool kit

MK2-3100 series

for 3-1/2

" and 4-1/2" stroke

damper frame

MK-3000 Series, MK2-3000

Series, MK4-3000 Series

Pneumatic Damper Actuators

General Instructions

Table-1 Nominal Damper Area For Proportional Control

Actuator Part

Number

MK-3101

MK-3101-108

MK2-3101 MK4-3101

MK-3111

MK2-3111

MK-3121-109

MK-3121

MK2-3121

MK-3141

MK4-3141

MK-3151

MK-3161

MK-3201 MK-3211

MK-3221 MK-3311-109 MK-3321-102

MK-3801

MK4-3801

MK-3811

MK-3821

MK-3841

MK4-3841

MK4-3111 MK4-3811

MK4-3121 MK4-3821

For two-position control use proportional rating of the same actuator with positive positioner. Damper ratings are nominal and based on standard (not low leakage) dampers at 1" (25.4 mm) W.C. static pressure and 2000 fpm (10 m/s) velocity.

Requires 20 psi be available to the actuator .

Requires minimum 15 psi be available to the actuator.

Proportional control with positioner (8-13 spring, 20 psi supply).

c c

d d

Parallel Blades Opposed Blades

11.6 1.07 15 1.39

23.2 2.15 30 2.79

34.8 3.23 45 4.18

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Table-2 Specifications.

Maximum Force

Return

Part Number

Nominal

Operating

Range

Starting

Pressure

Nominal

Stroke

Based on

1.5 psi

(10 kPa)

Pressure

Actuator

15 psi

(103 kPa)

Supply

Dual Press.

System

psig kPa psig kPa in. (mm) lb. N lb. N lb. N lb. N lb-in. N-m lb-in. N-m lb-in. N-m

3 (76)

MK-3101-108 3-7.2 21-50 3 ± 1 21 ± 7

MK-3101

MK2-3101

MK4-3101

MK-3111

MK2-3111

3-8 21-55 3 ± 1 21 ± 7

3-8 21-55 3 ± 1 21 ± 7 12 53 44 196 56 249 96 427 21 2.37 21 2.37 21 2.37

5-10 34-69 5 ± 1 3 ± 7 28 125 28 125 40 178 80 356 21 2.37 21 2.37 21 2.37

MK4-3111 5-10 34-69 5 ± 1 34 ± 7 28 125 28 125 40 178 80 356 49 5.54 49 5.54 49 5.54

MK-3121

MK-3121-109

MK2-3121

8-13 55-90 8 ± 1 55 ± 7 52 231 4 18 16 71 56 249 7 79 21 2.37 21 2.37

Adjustable

2 to 4 (51

to 102)

3 1/2 (89)

Adjustable

2 to 4 (51

to 102)

12 53 50 226 62 276 102 454 18 2.03 18 2.03 18 2.03

12 53 44 196 56 249 96 427 21 2.37 21 2.37 21 2.37

MK4-3121e8-13 55-90 8 ± 1 55 ± 7 52 231 4 18 16 71 56 249 7 79 28 3.16 91 10.28

MK-3141

MK4-3141

MK-3151

MK-3161

11-17

3-13 21-90

3-6

21-41

9-12

62-83

3-6

21-41

76-117

MK-3201 3-8 21-55 3 ± 1 21 ± 7 90o MK-3211 5-10 34-69 5 ± 1 34 ± 7 28 125 28 125 40 178 80 356 21 2.37 21 2.37 21 2.37

MK-3221 8-13 55-90 8 ± 1 55 ± 7 52 231 4 18 16 71 56 249 7 .79 21 2.37 21 2.37

MK-3311-109 5-10 34-69 5 ± 1 34 ± 7 3-1/2 (89)

MK-3321-102 8-13 55-90 8 ± 1 55 ± 7 52 231 4 18 16 71 56 249 7 .79 21 2.37 21 2.37

MK-3801

MK4-3801

3-8 21-55 3 ± 1 21 ± 7

MK-3811 5-10 34-69 5 ± 1 34 ± 1 28 125 28 125 40 178 80 356 21 2.37 21 2.37 21 2.37

MK4-3811 5-10 34-69 5 ± 1 34 ± 1 28 125 28 125 40 178 80 356 49 5.54 49 5.54 49 5.54

MK-3821 8-3 55-90 8 ± 1 55 ± 1 52 231 4 18 16 71 56 249 7 79 21 2.37 21 2.37

MK4-3821e8-13 55-90 8 ± 1 55 ± 1 52 231 4 18 16 71 56 249 7 79 28 3.16 91 10.28

MK-3841

MK4-3841

Factory setting required for published operating range.

Force and torques based on factory set stroke and starting pressure.

Nominal torque for actuators without positive positioner is based on 1.5 psi pressure change at the actuator.

Adjust pressure reducing valve so that listed pressures are available at the actuator.

Factory installed positive positioner (AK-42309-500) start point adjustable 2 to 10 psi with range adjustable 2 to 10 psi.

3-13 21-90

non-adj

3-6

non-adj

21 to

non-adj

2-3/4 (70)

Adjustable

2 to 2-3/4 (51 to 70)

Rotation Typical,

Adjustable

1.2 to 4.4

(30 to 111)

Adjustable

2 to 4 (51

to 102)

3-1/2 (89)

Adjustable

2 to 4 (51

to 102)

12 53 4 18 16 71 56 249 7 79 21 2.37 21 2.37

12 53 12 53 24 107 64 285 21 2.37 21 2.37 21 2.37

12 53 0 0 0 0 24 107 0 0 0 0 21 2.37 12 53 44 196 56 249 96 427 21 2.37 21 2.37 21 2.37

28 125 28 125 40 178 80 356 21 2.37 21 2.37 21 2.37

12 53 44 196 56 249 96 427 21 2.37 21 2.37 21 2.37

12 53 4 18 16 71 56 249 7 79 21 2.37 21 2.37

Power Stroke

15 psi

(103 kPa)

Supply

Single Press.

System

20 psi

(138 kPa)

Supply

Single or

Dual Press.

System

15 psi

(103 kPa)

Supply Dual

Press.

System

Nominal Torque

Proportional Control

15 psi

(103 kPa)

Supply

Single Press.

System

20 psi

(138 kPa)

Supply

Single or

Dual Press.

System

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Figure-1 MK-3100 Series Dimensions.

Mounting plate for MK-3101-108 and MK-3300-102 Series Actuators

Figure-2 MK-3200 Series Dimensions.

Figure-3 MK-300 Series Dimensions2.

All dimensions shown in the Instruction Sheet are in inches.

Figure-4 MK-3800 Series Dimensions.

Typical Model shown. Linkage, and air connection details may vary from

Model to Model.

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MK-3100 Series Typical Mounting

Accessories Required for Mounting Per Figure 5

1 — AM-113 Crank arm. 1 — AM-122-0-0-2 or AM-132-0-0-2 ball joint. 1 — AM-125 link rod 5/16-inch x 20 inches. To mount proceed as follows. Refer to Figure 5.

1. Measure a minimum of 8 inches from damper shaft in the direction of actuator location.

2. Hold actuator up to duct with actuator shaft approximately 1-1/2 inches above (N.C.) or below (N.O.) damper shaft and mark mounting holes.

3. With drill or punch, pierce holes marked in Step 2.

4. Mount actuator to duct.

5. Attach ball joint to crank arm at approximately 2-1/2 inches from center of shaft hole.

6. Attach crank arm to damper shaft at approximately 45° angle, from vertical, toward actuator with damper in the normal actuator retracted position.

7. Connect actuator ball joint to crank arm ball joint with 5/16-inch diameter rod. Cut off excess rod.

8. Refer to Checkout.

Figure-5 MK-3100 Series Typical Mounting.

MK-3300 Series Typical Mounting

Note: MK-3300 Series Models are designed for Mixing Box applications. Mounting, Linkage, and air connection details vary among Models. See Actuator Selection Sheet F-13795 for more information.

Figure-6

MK-3200 Series Typical Mounting

Accessories Required for Mounting Per Figure 7 2 — AM-113 crank arm. 2 — AM-122-0-0-2 or AM-132-0-0-2 ball joint. 1 — AM-125 link rod 5/16-inch x 20 inches. To mount proceed as follows. Refer to Figure 7.

1. Locate actuator on a surface perpendicular to the damper shaft, with the actuator rotary shaft approximately in line with the damper shaft.

2. Hold actuator up to duct and mark mounting holes.

3. With drill or punch, pierce holes marked in Step 2.

4. Mount actuator to duct.

5. Attach crank arm to actuator shaft at approximately 45° angle.

6. Attach ball joint to crank at approximately 2-1/2 inches from center of shaft hole.

7. Attach crank arm to damper shaft an approximately 45° angle, from vertical, toward actuator with damper in the normal actuator retracted position.

8. Attach ball joint to crank arm at approximately 2-1/2 inches from center of shaft.

9. Connect actuator ball joint to crank arm ball joint with 5-1/6-inch diameter rod. Cut off excess rod.

10. Refer to Checkout.

Accessories Required for Mounting Per Figure 8

1 — AM-125 link rod 5/16-inch x 20 inches. 1 — Connector as required for connection to driven device. To mount proceed as follows. Refer to Figures 6 and 8.

1. Drill holes in mounting surface as shown in Figure 6.

2. Mount actuator.

3. Connect actuator.

4. Refer to Checkout.

Figure-7 MK-3200 Series Typical Mounting.

Page 5

Figure-8 MK-3300 Typical Mounting.

MK-3800 Series Typical Mounting

Accessories Required for Mounting of Actuator Per Figure 9 through 11

1— AM-532 bolt-on frame bracket kit.

Note: Bracket kit includes the frame bracket, leaf connector, and necessary screws or bolts and nuts.

To install the actuator proceed as follows:

1. Prepare the damper by drilling necessary holes, etc. See Figures 11 and 15 for bolt-on bracket.

2. Attach bracket and leaf connector to damper.

3. Attach actuator mounting plate to damper bracket.

4. Install pivot stud to actuator mounting plate.

5. Install actuator to pivot stud and connect clevis to blade connector.

Note: Adjust clevis as needed to align clevis and leaf connector.

Figure-10 MK-3800 Series Typical Mounting,

Normally Closed.

Preparing Damper for Frame Mounting of Actuator

Refer to Figures 11 and 15 for required holes, etc. for AM-532.

Figure-11 Typical Bolt-On Bracket Mounting.

Accessories Required for Mounting of Actuator Per Figure 12

1 — AM-530 crank arm. To install proceed as follows:

1. Attach mounting plate to duct or wall with damper shaft protruding through locator hole in mounting plate. If this is

Figure-9 MK-3800 Series Typical Mounting, Normally Open.

not possible, additional shaft extensions may be used to allow locating the actuator farther from the damper shaft. Each extension provides 4 inches of extension to the actuator shaft and may be used in multiples.

2. Install the pivot stud to the mounting plate.

3. Install actuator on pivot stud.

4. Install crank arm on damper shaft at approximately 45° angle from vertical toward actuator.

Page 6

Note: Figure 12 shows position for normally closed.

5. Manually position damper to full retracted actu ator position and tighten crank arm in position described in Step 4.

6. Connect clevis to crank arm in hole closest to damper shaft. If necessary adjust clevis and/or extensions.

7. Refer to Checkout.

Figure-12 MK-3800 Typical External Pivot Mounted.

Figure-13 Mk-3800 Series Mounting Plate.

Figure-14 MK-3800 Series Clevis.

Figure-15 AM-532 Bolt-On Frame Bracket.

Page 7

CHECKOUT

After installation, the actuator should be checked to insure proper damper operation. To check the actuator and linkage, proceed as follows:

1. Check the linkage with the actuator in the retracted position for proper return force. The actuator should be linked so that on a normally closed application, the damper is closed with no more than 1/16-inch compression of the spring. (The actuator shaft would return an additional 1/16-inch if the linkage were disconnected.) For a normally open application, the actuator should be linked with the actuator fully retracted.

2. Apply air pressure to the actuator or pilot port of a positioner and check the linkage as follows. On a normally closed application, the damper should be just full open when the actuator piston reaches the stops in the actuator. On a normally open application, the damper should reach the closed position with no more than 1/16-inch stroke remaining to reach the actuator stops.

3. The above can be obtained through adjustment of the ball joint in the crank arms or by adjustment of the actuator stops. The amount of thread engagement of the actuator ball joint or extension shaft may also be used to assist in proper linking.

Connection of Air Line: On pivot mounting arrangements, Figures 9, 10 and 12, control air lines MUST be terminated at the actuator with at least 6 inches of flexible tubing to allow for pivoting of the actuator. On mounting arrangements, Figures 5, 7 and 8, control air lines may be connected directly with either copper or plastic tubing, as required by application.

Caution: On MK2-31X1 Series, metal connectors and tubing must be used.

Adjustable Starting Pressure: Actuators are available with adjustable starting pressure. To adjust the starting pressure, turn adjusting nut supporting the spring clockwise to increase and counterclockwise to decrease the starting pressure. Each rotation of the adjusting nut changes the starting pressure .04 psi (.28 kPa).

Adjustable Stroke Length: Stroke length is determined by the two stops located on either side of the actuator. Stops are set for 3-1/2-inch stroke. mark this point and measure toward the diaphragm end of the actuator to reduce the stroke or away from the diaphragm end to increase the stroke. Maximum stroke length is 4 inches. By increasing the stroke length, the force available to resist an opposing force is decreased while decreasing the stroke length increases this force.

Diaphragm Replacement: If the actuator diaphragm should leak, it may easily be replaced by removing the four screws holding the top power housing. Make sure that shaft swivel joint is in place on the end of the shaft. Remove the screws and old diaphragm. Roll the new diaphragm inside out and install over the piston making sure the circular bead is facing up. Put the top power housing back in place making sure the bead on the diaphragm is in the housing groove and the screw holes are lined up. Tighten housing screws.

UNITS WITH FACTORY MOUNTED POSITIVE POSITIONERS

Figure-16 Typical Factory Mounted Positioner.

For Actuators with Positioners:

Note: If actuator is frame pivot mounted, the actuator must be mounted to the left-hand frame. If actuator is mounted external, Figure 12 must be on right-hand side of duct.

Install fittings required in Ports 2 and 3.

ADJUSTMENTS

Refer to Figure 16. Range Adjustment: Adjustable 2 to 10 psig (14 to 69 kPa).

Factory set at 5 psig (34 kPa). Range is the pressure change required to produce full actuator stroke.

If adjustment is required (see Figure 16), with a small screwdriver loosen screw on range slider approximately 1/2 turn.

Move the graduated range slider until desired pressure mark lines up with center of screw and tighten screw.

Start Point: Adjustable 2 to 10 psig (14 to 69 kPa). S tart point is the pressure at which the actuator just begins to extend. See Figure 16.

Connect main air supply to Port 3 and a variable air supply to Port 2.

1. Adjust variable air supply on Port 2 to desired start point pressure.

2. Adjust the start point screw with small screwdriver until actuator just starts to extend.

3. Gradually raise pressure on Port 2 until actuator is fully extended, and readjust range slider to obtain desired range if further adjustment is necessary.

4. Remove variable air supply from Port 2 and connect to controller output.

Page 8

On Octo ber 1st, 2009, TAC became the Buil ding s business of i ts parent c om pany Sch neider Electric. This document reflects the visual ident ity of Schneider El ectric, ho wever the re rema ins ref erences to TAC as a co r p or ate br and in the body copy. As each document i s updated, the body co py will be cha nged to reflec t appropriate

Figure-17 Typical Piping Diagram with Factory Mounted Positive

Note: If slave damper actuators are to be controlled, tee into the tubing from Port 1 to the actuators. All dampers must be mechanically interconnected.

Positioner.

corpo rate br a nd ch a nges.

Copyright 2010, Schneider Electric All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained within this document is subject to change without notice.

F-12586-11