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MEP-7xxx Direct-Coupled Actuators (up to 320 in-lb.) 

Applications Guide, AN1113A Rev. D

Torque Requirements for Dampers

Introduction

This application guide gives torque selection, ac-

cessory, master/slave wiring, troubleshooting, and 

other related information.
For help choosing the best model for an application, 

see 

Models on page 4

 and also the 

KMC Actua-

tors Selection Guide

.

For 

specifications and other information

, see the 

MEP-7500/7800 Series Data Sheet

.

For 

general mounting, connections, and configura

-

tion

, see the 

MEP-7200/7500/7800 Series Installation 

Guide

.

For possible proportional heating/cooling 

applica-

tions using the CTE-5202 electronic thermostat,

 see 

the 

CTE-5202 Applications Guide

.

For 

valve applications

, see information on:

• 

VEB-53 Series

 

Two

-Way, Flanged 

Ball

 Valves (4 

to 6")

• 

VEB-56 Series 

Three

-Way, Flanged 

Ball

 Valves 

(4 to 6")

• 

VEF-53 Series

 

Two

-Way, Rubber-Lined, 

Butter

-

fly

 Valves (2 to 6")

• 

VEF-56 Series

 

Three

-Way, Rubber-Lined, 

But-

terfly

 Valves (2 to 6")

The latest 

support files are always available on the 

KMC Controls web site (

www.kmccontrols.com

)

.

Important Notices

The KMC logo is a registered trademark of KMC 

Controls, Inc. All rights reserved. No part of this 

publication may be reproduced, transmitted, tran

-

scribed, stored in a retrieval system, or translated 

into any language in any form by any means with-

out the written permission of KMC Controls, Inc.

The material in this document is for information 

purposes only. 

The contents and the product it de

-

scribes are subject to change without notice.

 KMC 

Controls, Inc. makes no representations or warran-

ties with respect to this document. In no event shall 

KMC Controls, Inc. be liable for any damages, direct 

or incidental, arising out of or related to the use of 

this document.

Damper manufacturers should provide information 

about the required minimum actuator torque. If 

that information is not available, use the following 

Damper Type

Opposed Blades Without Seals

Parallel Blades Without Seals

Opposed Blades With Seals

Parallel Blades With Seals

Up to 1000 FPM

3 in-lb. per square foot

4 in-lb. per square foot

5 in-lb. per square foot

7 in-lb. per square foot

1000 to 2500 FPM

4.5 in-lb. per square foot

6 in-lb. per square foot

7.5 in-lb. per square foot

10.5 in-lb. per square foot

2500 to 3000 FPM

6 in-lb. per square foot

8 in-lb. per square foot

10  in-lb. per square foot

14 in-lb. per square foot

general guidelines to calculate the required mini-

mum torque.

Содержание MEP-7 Series

Страница 1: ...roduction 2 Torque Requirements for Dampers 2 Models 3 Accessories 4 Auxiliary Switches and End Stops 4 Transformers 4 Enclosure Cord Grip and Wiring Kits 4 Thermostat 4 Mounting Brackets and Crank Arm Kit 5 Master Slave Wiring 6 All Master Slave Combinations 6 MEP 7802 7852 Proportional Actuators 6 MEP 7801 7803 Tri State Actuators 7 MEP 7851 7853 Tri State with Fail Safe Actuators 7 ...

Страница 2: ...D Specifications design and operation are subject to change without notice Configuration 8 Troubleshooting 8 Auxiliary Switch Does Not Work 8 Fail Safe Does Not Work 8 Feedback Does Not Work 8 No Rotation 8 Rotation in Wrong Direction 9 Stroke Range Is Wrong 9 Wiring Issues 9 Index 9 ...

Страница 3: ...ademark of KMC Controls Inc All rights reserved No part of this publication may be reproduced transmitted tran scribed stored in a retrieval system or translated into any language in any form by any means with out the written permission of KMC Controls Inc The material in this document is for information purposes only The contents and the product it de scribes are subject to change without notice ...

Страница 4: ...500 series x 5 7800 series x 8 4 MEP 7x02 4 4 MEP 7x03 4 4 MEP 7x51 4 4 MEP 7x52 4 4 4 MEP 7x53 4 4 4 The MEP 72xx series 120 in lb has been discontinued Use the MEP 75xx series 180 in lb or if less torque is required an MEP 48xx 80 in lb non fail safe or MEP 49xx 90 in lb fail safe instead To replace the MEP 70xx series 150 in lb use MEP 75xx series 180 in lb To replace the MEP 77xx series 300 in...

Страница 5: ...tuators from inclement conditions See also the HMO 4521 cord grip For sample proportional heating cooling applica tions using the CTE 5202 electronic thermostat see the CTE 5202 Applica tions Guide An HMO 4521 liquid tight cord grip threads into con duit fittings on MEP 7xxx actuators when an ingress protection rating of IP54 is required The HMO 4521 accepts 0 18 to 0 40 diam eter cables See also ...

Страница 6: ... arm kit is used when direct mounting of the actuator is impractical One HMO 4535 non rotation bracket is provided with each actuator It can span an open distance or be formed bent into a shape that increases the dis tance between the mounting surface and the actua tor Mounting Brackets and Crank Arm Kit ...

Страница 7: ...unt e g on KMC s flanged globe valves CW CCW Switches Fail Switches MEP 7852 only Unavailable Options Opposite Positions Opposite Positions 4 20 mA input and Auto Mapping MEP 7802 7852 Proportional Actuators MEP 7802 7852 Dual Triple or Quad Actuators 0 10 or 2 10 VDC STACKED Mount e g on KMC s butterfly valves CW CCW Switches Fail Switches MEP 7852 only Unavailable Options Same Positions Same Pos...

Страница 8: ...r In CW CCW SLAVE MASTER MASTER SLAVE MEP 7802 7852 Opposite Mount 0 10 VDC Input MEP 7802 7852 Stacked Mount 0 10 VDC Input MEP 7851 7853 Opposite Mount MEP 7801 7803 Opposite Mount MEP 7851 7853 Stacked Mount 24 VAC VDC Power In MEP 7x52 Only 0 10 VDC Control Signal 0 5 or 0 10 VDC Feedback Signal Control Signal Common MEP 7x52 Only MASTER SLAVE 24 VAC VDC Power In CW CCW SLAVE MASTER 24 VAC VDC...

Страница 9: ...ld the gear disengagement lever and manually rotate the shaft Check for a tripped circuit breaker to the trans former or power supply Check polarity and strength of input signal Check for proper supply voltage from the trans former or power supply and that it has enough capacity VA for all connected devices See their respective data sheets and Tips for Connecting 24 Volt Power Application Note AN0...

Страница 10: ...he wiring at the connected devices Use a voltmeter and ohmmeter to check the terminals for expected values See Tips for Connecting 24 Volt Power Applica tion Note AN0604D NOTE Wiring must be adequate to avoid exces sive voltage drop on long runs Allow plenty of cushion in measurements A meter may be too slow to register tran sient dips or peaks during startup Index Symbols 0 5 0 10 vs 1 5 2 10 VDC...

Страница 11: ...Selection Guide Actuator 3 4 Torque 3 Slave Wiring 7 Stacked Mount Master Slave 7 8 Stop Kit End 5 Stroke Range 10 Support Files 3 Switch Auxiliary 9 Fail Safe Direction 7 8 10 Feedback Voltage 9 Rotation Direction 7 8 10 T Thermostat 5 Torque Selection 3 Tri State 8 10 Troubleshooting 9 V Valve Applications 3 VEB 5x Series Ball Valves 3 VEF 5x Series Butterfly Valves 3 W Weather Shield Enclosure ...

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