FLAME SAFEGUARn CONTRULS phần 10 doc

TABLE Vi-USUAL COMBINATIONS OF FLUID POWER ACTUATORS AND V5055 INDUSTRIAL GAS VALVES

.~GAS

FLUIO VALVES LOW PRESSURE￾HIGH

PRESSUREb

POWER

ACTUATORS V5055A V5055B V5055C V5055D V5055E

TYPE· MODEL ON-OFF

CHARACTERIZED

GUIOEc vsor d ON-OFF VSOl d

---, -

A X X

V4D55 B X

On-Off D X

E X

V4062 A X

Off-Lo-Hi D X

V9055 A X

Mcdulating 0 X

as psi differential and 15 psi close-off (ell:cept 3 psi differential for 4 inch V50558).

b25 psi differential and 75 psi close-off for 1 through Hf2 inch valves; 15 psi differential and 45 psi close-off lor

valves 2 inches and over.

c Val...e guide has notches to determine vaive liO'N characteristics; provides predictable relationship between stem

trayel and gas llow,

dValye Seal Overtravel Interlock. Valve has 2 seais and actuator has a valve-closed indication switch.

MOlIllWlll

AUTO."'I( SUllY SHUTOff Ynus

.... v_.o Off-lO-HI Hi'RlSSURE

_---'~-ir..&~::R.~nA'uO

_" Gu'DE

v5115H

H"RU5IJR~

,---"..*i~.."..."1t O~ERfuvH '~TUl<XR _

FIG. 55- HONEYWELL FAMILY OF AUTOMATIC

SAFETY SHUTOFF VALVES.

tuator is energized, and closes wnen p::lwer is removed.

When closed, it seals off against the rated close-off pres￾sure with no power awJiad.

The actuator determines the method Of f1ring-a V4055

is used for on-off tiring, a V4062 tor high-low tiring, ard a

V9055 for modulated tiring. The V9055 Actuator can be

controlled directly from a series 90 controller (except Ihe

T991 family), just like the M941 Modutrol Motor. The

V9055 has a solid state balancing relay, so it is not sensi￾tive to normal burner vibration. Valvalactuator corrtlina￾tions providing a Valve Seal Overtrallel Interlocl< are

available to meet certain Underwriters Laboratories Inc.

and Faclory Mulual requirements. Nole that high fJlessure

valves and actuators are normally used only for on--off

firing.

7H7558·1

APPENDIX A-INSTALLING LINKAGES

ON M941 MODUTROL MOTORS

0605 DAMPER LINKAGE

ThE! Q1505 Damper Uttkage is used \0 connect an M941

MociJtrol Motor to a damper. Mocleis are available for

mounling the motc:'5r either inside or outsIde the duct.

WheABYer possible, mount the motor outside the ducl.

This will make lhe linkaQEI setup and adjustment easler

an:! will also facililale maintenance,

When used in a moclilaling system, besl control is 0b￾tained when the linkage (s adjusted for a ma:w:imum dam!>

er'op9Qing of 60 degrees. Up to this poinl, airtlow IhrOlJ\tl

a parallel ,blade damper is nearly prcp:lrtiona1 to damper

opening Qn angular degrees). Further c:pening 01 the

damper will pass only a small addilional amount at air.

ThE! motor shaft and damper shaft shouldtle alleasl14

inches 1355 mm] apart. If they are closer, ~he linkaQEI may

be difficullio adjust. If they are more than 3 or 4 teet [about

1 metre] apart, the long connecting rod may lack stiffness.

The 0605 Damper Unkage may be used 10 q::lerate

ellher parallel or opposed blade dampers (Fig. 56).

I

)

,

PARAllEl BLADE OPPOSED BLADE

ACTION ACTION

""

FIG. 56- PARALLEL AND OPPOSED BLADE

DAMPERS.

INSTALLATION AND ADJUSTMENT

After mounting the molor, CorJ'l)Iel8 the foliowinQ steps

10 install am adjust the Q605 Damper linkage. For further

detalls, reter \0 the Q605 instruclion sheet. form 60-2003.

STEP 1

Align the motor shaft holes in 'he crank arm and crank

trI..b. Place the crank arm assembly on the molor shaft

(FiQ. 57). TIghlen the motor crank arm screws only IhurT'b￾light, as further adjustments will be required.

FIG. 57-INSTALLING THE CRANK ARM ON

THE MOTOR SHAFT.

STEP2

Slip the damper crank arm on the damper shaft. Do not

tiQhten !he setscrews. The damper blades must be in the

position corresponding 10 the de-eneq;Ji2ed motor

position.

STEP 3

Install one ball}oint at the Innermost position of the m0­

tor crank am and another at lhe desired angular degree&

of·lravel mark on the damper arm. See Fig, 58.

(Remember that, with 90 degree molors, damper crank

arm travel will be ab;)uI half that indicated on the crank

arm, On noncalitw'ated damper arms, awro:w:imate the po￾silions shown in Fig. 59 or 50, and adjust by energizing the

moJor laler,J

STEP 4

With both the molor and the damper closed, slide the

pushrcx:.t throu~ the 2 ball pints. nghtan lhe ball }Dints

only thumb-ti~1.

STEP 5

Run the motor through its full stroke and check 10r

pfq)9r damper and linkage operation. Adjust. il neces￾sary, and li~ten the ball joints.

NOTES:

11 the crank arms (motor and damper) are on lhe same

side of their respective shafts, the shafts will turn in the

same direction (FiQ. 59). 11 the crank arms are on opJXlSite

328

FIG. 60- Q605 INSTALLATION WITH CRANK

ARMS ON OPPOSITE SIDES OF THEIR

SHAFTS. (DAMPER ROTATES IN

OPPOSITE DIRECTION FROM

MOTOR.)

FIG. 58- POSITIONING THE BALL JOINT ON THE

DAMPER CRANK ARM.

'0.'. ,.,

k.

I

,

'O~1T10" CD

PO"TIO" (j)

K'''TIO'' (i) ~IN'~H OF HROKE

FIG. 59- Q605 INSTALLATION WITH BOTH

CRANK ARMS ON THE SAME SIDE OF

.TAEIR SHAF(S. (DAMPER ROTATES IN

SAME DIRECTION AS MOTOR.)

sides at the shafts, the shatls will turn in q:posite direc￾tions (Fig. 60).

Q1008 LINKAGE

The 01008 Unkage is used to connecC an M941

Moclutrol Motor 10 a V51 E 8utterfly Gas Valve. The moIor

must b8 set for a 90 degree stroke only.

INSTALLATION

Special parts needed for the basic assen'Oly are fur￾nished in bag assemblies. For adapting the 01008 Unk·

age 10 operate dampers. auxiliary valves. or other

equipment, see the burner manuiacturer's ircslructiorls.

Install the molar and linkage on the valve as follows (rater

to Fig. 61):

1. Mount the plate on the stop bracket with three No. 10

screws and lock washers.

329

The angular position of the dalT'4'Elr arm on the shan

must never permit the arm to reach a near.oea(l.center p0­

sition at either end at its stroke.

CHECKOUT AND SERVICE

CheCk Ihe linkage for the following poinfs:

1. There should be nothing (such as pipes, wcts. or

concluitsl to ObStruct the movement of the molar. linkage.

or damper. The motor must be tree 10 run through its entire

stroke to prevenl damage 10 it.

2. All ball joints and olher connections should be t"trt

and show no sign at Sliwa-ge.

3. 1ll& darrp:lr should operate smoothly andpresent no

unusual load 10 the motor and linkage.

2. Mount the motor on the plate with four 1(4 Inch

screws. lock washers, and ools.

3. Make sure the molar Is In the • closed~ position (the

position assumed when motor terminals are shorted Red￾tOWhlle). Install the motor crank arm and lig,ten the

clamp screw securely.

4. Inslall the valv& actuating arm.

5. Slide the linkage rod through the ~r and k:Mer

ball joinlS. and prOCeed with adjustments.

ADJUSTMENTS

1. Loosen the Allen head salscrews In the ball

joinl 10 allow the linkage rocl to slide treely. l..Dosen 1h&

71-97558-1