flame safeguard control phần 6 ppsx

R4075E DUAL INDUSTRIAL FLAME

SAFEGUARD CONTROL (FIG. 63)

The R4075E consIsts 01 2 controls on 1 chassis 10 pro￾vide Independer1t ~rvislon of 2 indusUial burners. 11

can al$O be used for redundanl safely conlrol systems or

for l1JaI·fuel applications. With 2 controls on' chassis, the

mOUFllinQ space r9QJlred Is only hatf (hal previously

.-.

Each control is similar to the R4075C, and thus is

ac:lapled for the 'Same family of plug-in name sIgnal amplifi·

ers developed for the R4140. Any ccrrt>inalion 01 standard

and/or sal1·checking flame detection system can be used

by mi;ling or matching the amplifiers. For BKample, a flame

red can be used 10 delecl Ihe pilot, and a self-checking

C7012E or F Ultraviolet Flame Deleclor can be used for

the main burner flame. Since all amplifiers are plug-in, Ihe

detection rJ'\C:lClI3'can be changed anytime after Jnstallation.

Because terminal designations for lhe R4075E are

unlQJ9, II requires a special Q295A1054 Wiring Subbase.

The R4075E is available in 120 and 220 voll models.

SEQUENCE OF OPERATION FOR THE R4075E

(FIG. 64)

The q:>eration of the 120 volt model o1lhe R4075E will

be described. The sequence 01 operalion for the 220 voll

model is the same; it just has 2 addilionallransforrners to

provide 120 volts for the shullers on C7012E or F Purple

Peeper Ullraviolet Flame Detectors. The schematic ill

Fig. 64 shows all relay conlacls in the de-enerQized posl￾lion. Refer 10 file 8eq.Jence 01 {)peralion on the following

2 pages.

TIlANSo

50ECTIDN A FORMER

T[R"INA~

STII.IP ON;_-:- SUIBASE￾P~UG·IN

~~~~IEF~~~:"'~''---'''''~

CHASSIS

II.ETAINING

SCREW

.... FIG. 63- R4075E INSTALLEO ON A Q295A1054

SUBBASE.

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SEQUENCE OF OPERATION FOR THE R4075E

lRe R4075E consists of 2 identical sections. A and B. This sequence of operation is tor one section. The operalion 01

the olher section is identical.

NOTE: Italics denote special applications.

NORMAL OPERATION

OPERATOR ACTION R407SE OPERATION SYSTEM OPERATION

TO START;

1. Reset an limits. O:ls:e the master

_h on' the .~ silencing

swilch (If used).

1TI0>t

Cb ret push in the srART

buttm' _before the rna_

_ itch 18 COITIpletely cbsed.

1. a.

b.

Poo¥9r iI5 applied to terminalS thrtJUgh

the Ifllits, alarm sll&ncing switch, and

STOP station; the plug-in amplifier is

energized.

Power Ie applied to terminal 7 (through

the alarm silencing switCh}. Ilnd to tar￾minal 8 ('through 11<2).

,. 11..

b.

Standby to start.

The alarm is energized.

2. Push in 1t'Ie START button on Itll~

S445A and I1:lld it in.

2. a. Power is appliell Ie the ignition trans￾former and to termiN.I 3 through thE!

limits, alarm silenCing ~h. STOP

6't!ltion, imernal jlmper in trnI S445,A,.,

and START S'tlltion.

2. a. Th. ignition transformer on' pibt

vaJve (or 1st stage oil valYe) afe ener·

glzad. The pilot valve opens and the pi￾bt is ignited. The flame detector de­

(ects the pilot flame

b. Relay 1K pUll$ in lIlrough 2K2 (sale

6't!lrt contacl) Contact 1Kl eto$MI. by·

passing 2~: 1K2 opens on' 'KJ

clo!l9S.

b The alarm i$ dlHlnerglzed.

,. If M R7247C Dynanjc Sdf Check Am￾pMer is used, power is applied from ler￾c. It a C70f2E rx F Purpfe Peeper Ultra·

viciel Flame Derectrx ('wI~h se/f<;heck·

3. Release 1I1e START button.

4. ~.n manual mol' vaJve{s} "''' used}.

TO STOP'

S. Push in the STOP button on the

S4'SA ,,' "''' •;, until the

.larm is energized.

e. ~pen the alarm silencing _h

used).

7. Open the master switCh.

mihal3 through the sciid stare switch ih

I the amplifier (be/ween amplifier term!·

nals 16 Md ll). /0 terminal 12.

,. When the pibt flarne is d6t9Ct8d, relay

2K pulls in. Contact 2K1 closes, by￾pusing lIlll START station fran ter.

mil'\8.l 6, lIlroullh 2Kl and 110, 10 ter·

minal 3. Contset 2K2 opens ContaCl

2K3 closes: power is applied Irem ter·

minal 3111rough 1K1 anO 21<3 to tsrm~

nal S.

3. Normal operation. including setl-chec:k￾ing or the flarntl detectioo sysiem frf a sell·

checking system is used)

• Normal operation.

S. a._. ,~, -I&rminal o.

This removes fran terminals 3,

S. and 12. The plug-in amplifier is de￾energized and relay 2K drops out.

b. Relay 1K drops out: 11<2 closes.

,. All relay ronlecle are rasat lor the nelCl

startup.

o. Power is removed fran lermjnals 7 end 8.

7. None.

ing leattore) i$ used, the shutter is el"lEW"­

gized.

,. Tho automatic main fuel vatve(s} ;,

energizeo. The valve(s) opens lind lila

main bumer;$ ignited. Tha system i$ in

th, ,", condition, (If • mMLIally

opened valve is used, the maoil burl"lEW"

will nol be ignited unlil step 4 is com￾pleled.)

3. The igntfun 1rlinstormer is de-energized.

• The main burner is ignited. The system 1$

in the run concjtion.

S. a. The pilot valVe (or 1st stage ell valVe)

and 1t'Ie main fu&t VIltve(S) are de-ener·

giZed. The valves clo6e and the pilot

anI:! main burner flames go Out.

b. The alarm is energiz80

,. N~.

0 The alarm is d&-energized.

7. The SyStem is de-energizad.

18'