Johnson Controls Y20EBD Series Manuale di servizio

FANs 121, 125

Technical Bulletin

Issue Date 0493

Part No. 34-420-6, Rev. A

Code No. LIT-121775

lntroduction 3

•

Application Details 3

•

Glossary 4

Installation Procedures 5

•

Tools Needed 5

•

Kit Includes 5

•

Installation Overview 6

•

Configuration and Mounting 7

•

Actuator and Linkage 13

•

Travel Limits 16

Checkout Procedure 22

Replacement Parts 23

Y20EBD Valve Linkage

for M100 Motor Actuators

2 M Motor Actuators—Y20EBD Valve Linkage for M100 Motor Actuators

MMotor Actuators—Y20EBD Valve Linkage for M100 Motor Actuators 3

lntroduction

The Y20EBD Valve Linkage converts the rotary motion of an M100

Series Motor Actuator to a linear movement in order to operate several

types of valves.

A rack and pinion drive mechanism provides the linear movement. The

rack assembly contains a spring that, when compressed by over travel, will

maintain valve close off to rated values. The pinion gear may be reversed

for manual operation with a 3/8 inch socket drive extension for service of

controlled equipment.

Table 1: Selection Table--Actuators and Linkages

Linkage

Number Spring

Return

Actuator

Non-spring

Return

Actuator

Valve Seating Load, lb (n)

Y20EBD-1 M130 M120 75 (334) Green

Y20EBD-2 --- M140 150 (607) Yellow

Y20EBD-3 --- M150 270 (1201) Red

Y20EBD-5 M110 --- 40 (178) Orange

Y20EBD-6 M130 M120 100 (449)

Note: The Y20EBD linkage kit can be used on Barber-Colman

1-1/2 to 2 inch valves. Use the grooved adapter bushing provided

with the linkage kit for V-90 Series and the mid-bracket position.

Larger Barber-Colman valves can mount onto the Y20EBD yoke

directly; however, adding locally purchased large washers under

the linkage bracket to prevent paint damage is recommended.

A selection of models are available to adapt M100 Motor Actuators to

several types of valves.

A Y20EBD-4 linkage is available to enable an M150 Motor Actuator to

operate S91 auxiliary switches for automatic heating/cooling changeover

applications. The Y20EBD-4 allows additional over travel after valve

close off for switch operation. See Y20 Series Linkage Kits Product

Bulletin for a complete description.

Y20EBA valve linkage kits are available to adapt the M100 Series

Actuators to valves made by other manufacturers. See Y20 Series Linkage

Kits Product Bulletin for more information.

Refer to the technical bulletin provided with the motor actuator for

information on wiring the motor actuator and related adjustments.

Application

Details

4 M Motor Actuators—Y20EBD Valve Linkage for M100 Motor Actuators

The following terminology is used in these instructions:

CW--Clockwise refers to the direction of rotation of the actuator shaft as

seen from the load end.

Zero Position--The fully counterclockwise position of the actuator

shaft--the de-energized position of a spring return actuator.

Stem Up--The initial position of the stem is up before operating the valve.

Stem Down--The initial position of the stem is down before operating the

valve.

Push/Drive Down to Open--Pushing or driving the stem down opens

the valve.

Push/Drive Down to Close--Pushing or driving the stem down closes

the valve.

Pull/Drive Up to Open--Pulling or driving the stem up opens the valve.

Pull/Drive Up to Close--Pulling or driving the stem up closes the valve.

Stem Up/Drive Down--The stem is initially in the up position and the

motor actuator through the linkage will drive the stem down.

Stem Down/Drive Up--The stem is initially in the down position and the

motor actuator through the linkage will drive the stem up.

Three Way Mixing Valve--A valve with two inlets and one outlet. Valve

seats on both stem up and stem down travel.

Three Way Diverting Valve--A valve with one inlet and two outlets.

Valve seats on both stem up and stem down travel.

Glossary

MMotor Actuators—Y20EBD Valve Linkage for M100 Motor Actuators 5

Installation Procedures

•screwdriver, small blade

•screwdriver, medium blade

•pliers

•wrench, adjustable, medium

•socket wrench, 3/8 inch drive

2/3

5/6

Y20D1-01

Item Description Quantity Item Description Quantity

1Mounting Bracket Assembly 1 8Washer (High Temp) 4

2Valve Bushing, 3/4 in. Not

Grooved 19Hex Nut, 1/4-20 4

3Valve Bushing, 1 in. Grooved 1 10 Valve Stem Connector 1

4Yoke Nut 1 11 Rack Subassembly 1

5Hex (Jam) Nut, 1/4-28 1 12 Gear Subassembly 1

6Hex (Jam) Nut, 3/8-20 1 13 Washer, Black 2

7Hex Cap Screw 4 14 Screw 2

Figure 1: Kit Components

Tools Needed

Kit Includes

6 M Motor Actuators—Y20EBD Valve Linkage for M100 Motor Actuators

Upright mounting of the motor actuator is recommended.

When valve mounting, do not mount below the horizontal plane of the

valve piping to prevent damage to the motor actuator if the valve leaks or

develops condensation.

Do not install the motor actuator in atmospheres with explosive vapors or

escaping gases, or where vapors having deteriorating properties might

attack the actuator’s metal parts.

Do not install where the ambient temperature of the surrounding area falls

below -40°F (-40°C) for non-spring return motor actuators, or

-35°F (-37°C) for spring return motor actuators. The maximum ambient

temperature of the surrounding area of the motor actuator should not

exceed 125°F (52°C).

Valve medium temperatures above 250°F (121°C) are permissible only if

the maximum ambient temperature at the motor actuator is less than 105°F

(41°C).

Use insulating washers furnished with the linkage kit for valve medium

temperature applications over 250°F (121°C).

Locate the motor actuator where the shaft and wiring terminals are

accessible.

The non-spring return M100 Actuator will hold its position if power is

removed. The spring return actuator will return to its zero position if

power is removed. Both types will hold their current position if the

control signal is satisfied.

Note: The spring return is intended only as a safety feature to drive the

actuator to its zero position in the event power is interrupted or

turned off.

There are three sections to the installation of the Y20EBD valve linkage

kit:

1. Configure and mount the yoke on the valve.

2. Mount the actuator and linkage assembly to the yoke and connect to

the valve.

3. Adjust the travel limits to actuate the over travel spring and seat the

valve.

Installation

Overview

MMotor Actuators—Y20EBD Valve Linkage for M100 Motor Actuators 7

The information obtained in the following steps will be used for the travel

adjustments later. The reason that these measurements are here is that it is

easier to take the measurements prior to installing the linkage and actuator

than after.

For valves with various lift requirements, the actuator will require a

change in travel by 15°for each additional 0.1 inch (2.54 mm) of lift

required.

To determine the lift required:

Valve Stem

Full Up

Valve Stem

Full Down

Figure 2: Stem Travel Measurement

1. Measure the valve stem length in the full down position as shown in

Figure 2.

2. Measure the valve stem length in the full up position as shown in

Figure 2.

3. Subtract the full down position from the full up position, this will

provide the valve lift.

4. Divide the valve lift by 0.1 inch.

5. Multiply the result by 15°.

6. Provide additional 15°rotation on 2-way valves and 30°additional

rotation on 3-way valves for over travel seating.

Note: Maximum actuator rotation is 270°, which allows up to 1.7 inches

lift on 2-way valves and 1.6 inches lift on 3-way valves.

Note: VT valves have only 5/16 inch lift which requires a reduction of

actuator travel by 25°from factory setting.

Record the value for use with the travel adjustments.

Configuration

and Mounting

Valve Lift

8 M Motor Actuators—Y20EBD Valve Linkage for M100 Motor Actuators

When configuring the yoke, two areas have to be considered:

•the distance the actuator will be from the valve (height)

•the direction of drive the actuator is going to provide to the valve

To determine the height:

Yoke

Mounting

Surface

Valve Stem

Full Up

Valve Stem

Full Up

Figure 3: Height Measurement

1. Raise the valve stem to its full up position.

2. Measure from the yoke mounting surface to the top of the stem.

Brackets

Yoke

High

Low

Medium

Y20A1-04

Figure 4: Linkage Bracket Positions

The linkage brackets can be mounted to the yoke in one of three positions:

low, medium, or high.

•Low position for stem lengths from 2 inches up to 3 inches

(50.8 to 76.2 mm) in full up position. Johnson brass valves up to

2 inch (50.8 mm) pipe size.

•Medium position for stem lengths from 3 inches to 4 inches

(76.2 to 101.6 mm) in full up position. Johnson iron valves from

2-1/2 inches (63.5 mm) pipe size and larger. V90BA valves up to

2 inch (50.8 mm) and V90CA valves up to 3 inch (76.2 mm) pipe

sizes.

Configuring Yoke

Height

MMotor Actuators—Y20EBD Valve Linkage for M100 Motor Actuators 9

•High position for stem lengths from 4 inches to 5-7/8 inches

(101.6 to 147.2 mm) in full up position. V90CA valves from 4 inch

through 6 inch (101.6 through 152.4 mm) pipe sizes.

LOAD ENDLOAD END

Y20A1-05

Figure 5: Long and Short Stem Valve Bodies

The left side of Figure 5 shows a Y20EBD Valve Linkage in the high

position connecting a 3-way valve body with a long stem to a M100 Motor

Actuator for stem up operation.

The right side of Figure 5 shows a Y20EBD Valve Linkage in the low

position connecting a 2-way valve body with a short stem to a M100

Motor Actuator for stem up operation.

Except for M100C (reverse acting) and M100H models, with an increasing

signal, the actuator always operates Clockwise (CW) from its zero

mechanical position. This clockwise rotation can be used to drive the

valve stem up or down, depending on the way the gear housing is attached

to the actuator.

To determine the direction of actuator drive:

LOAD END

Directionof

Drive Rotation

Y20D1-06

Figure 6: Motor Actuator and Valve

Direction

10 M Motor Actuators—Y20EBD Valve Linkage for M100 Motor Actuators

1. With the motor actuator next to the valve, view the motor actuator

from the load end.

2. Determine the type of valve being used and the direction that will be

required to drive the stem from its initial position.

•Stem Up Two Way Valve--Drive Down to Close

•Stem Up Two Way Valve--Drive Down to Open

•Stem Down Two Way Valve--Drive Up to Open

•Stem Down Two Way Valve--Drive Up to Close

•Stem Up Three Way Valve

•Stem Down Three Way Valve

Load End Load End

Y20A1-07

Figure 7: Stem Up/Drive Down and Stem Down/Drive Up

3. For valves with the stem in the initial up position, the hole in the yoke

will be to the right of center when facing the load end as shown in the

left illustration of Figure 7.

For valves with the stem in the initial down position, the hole in the

yoke will be to the left of center when facing the load end as shown in

the right illustration of Figure 7.

The brackets are assembled at the factory in the low position and for stem

up/drive down valve application with the hole in the yoke to the right of

center as shown in the left illustration of Figure 7.

For any other application, the yoke and brackets must be disassembled and

reassembled for the specific application as described below.

Screw

Left Side

Bracket Right Side

Bracket

Nut

Washer/

Yoke

Y20D1-O8

Figure 8: Bracket Components

Changing Yoke

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