Sterling STT 300 User Manual

Op er ating In struc tions

De hu mid ified Air Dryer
STT 300
with Simens con trol unit

516-2MS

Ster ling Ma te rial Pro cess ing

Please note that our address and phone information has changed.
Please reference this page for updated contact information.

These manuals are obsolete and are provided only for their technical information, data and capacities.
Portions of these manuals detailing procedures or precautions in the operation, inspection, maintenance
and repair of the products may be inadequate, inaccurate, and/or incomplete and shouldn’t be relied
upon. Please contact the ACS Group for more current information about these manuals and their
warnings and precautions.

Parts and Service Department

The ACS Customer Service Group will provide your company with genuine OEM quality parts manufactured to engineering
design specifications, which will maximize your equipment’s performance and efficiency. To assist in expediting your phone
or fax order, please have the model and serial number of your unit when you contact us. A customer replacement parts list
is included in this manual for your convenience. ACS welcomes inquiries on all your parts needs and is dedicated to
providing excellent customer service.

For immediate assistance, please contact:

• North, Central and South America, 8am – 5pm CST [phone] for drying, conveying, heating and cooling
and automation. For size reduction: [phone].
North America, emergencies after 5pm CST [phone]

North America email: [e-mail]

• Mexico, Central & South America
Email: [e-mail]

• Europe, Middle East & Africa [phone]

Email: [e-mail]

• India [phone]

Email: [e-mail]

• Asia/Australia [phone]

Email: [e-mail]

Sales and Contracting Department

Our products are sold by a worldwide network of independent sales representatives. Contact our Sales Department for the
name of the sales representative nearest you.

Let us install your system. The Contract Department offers any or all of these services: project planning; system packages
including drawings; equipment, labor, and construction materials; and union or non-union installations.

For assistance with your sales or system contracting needs please Call:

North, Central and South America [phone] or [phone] Monday–Friday, 8am–5pm CST

Europe/Middle East/Africa [phone]
India [phone]
Asia/Australia [phone]

Facilities:

ACS offers facilities around the world to service you no matter where you are located. For more information, please visit us at
www.acscorporate.com

United States:

ACS Schaumburg – Corporate Offices

1100 E. Woodfield Road
Suite 588
Schaumburg, IL 60173
Phone: + 1 847 273 7700
Fax: + 1 847 273 7804

ACS New Berlin – Manufacturing Facility

2900 S. 160th Street
New Berlin, WI 53151
Phone : [phone]
Fax: + 1 262 641 8653

Asia/Australia:

ACS Suzhou

109 Xingpu Road SIP
Suzhou, China 215126
Phone: + 86 8717 1919
Fax: [phone]

Europe/Middle East/Africa:

ACS Warsaw

Ul. Działkowa 115
02-234 Warszawa
Phone: + 48 22 390 9720
Fax: [phone]

India

ACS India

Gat No. 191/1, Sandbhor Complex
Mhalunge, Chakan, Tal Khed,
Dist. Pune 410501, India
Phone: [phone]
Fax: + 91 20 40147576

Ster ling Ma te rial Pro cess ing

5200 West Clinton Ave.

Mil wau kee, WI 53223

Tele phone: [phone]
Fax: [phone]

www.sterlco.com

Ser vice de part ment:
Tele phone: [phone]

Edi tion: 05/02
Or der con fir ma tion num ber: _ _ _ _ _ _ _ _ _ _ _

STT 300

These op er at ing in struc tions are for:*

(* Plea se fill in per so nal ly)

Se ri al num ber:

Built in:

Date of de li very:

Num ber of de li very:

Date of com mis sio ning:

Lo ca ti on:

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Group of ma chi nes:

2

STT 300

Ster ling Ma te rial Pro cess ing re tains all rights to change the in for ma tion in these
op er at ing in struc tions at any time with out no tice.

We as sume no li a bil ity for any er rors or di rect or in di rect dam age re sult ing in con ­text with these op er at ing in struc tions.

Copy ing, trans la tion or pub li ca tion in any form ex cept for per sonal use of pur -

516-2MS

chaser re quires ap proval from Ster ling Ma te rial Pro cess ing.

All rights re served.

3

STT 300

TA BLE OF CON TENTS

1. Gen eral In for ma tion ...............................................1-1

1.1. Warn ings and sym bols.............................................1-2

1.2. Ex pla na tions and in for ma tion .......................................1-3

1.3. Le gal ba sis ......................................................1-3

1.4. Fields of ap pli ca tions ..............................................1-3

1.5. Notes on Us age ..................................................1-3

2. Safety in struc tions ................................................2-1

2.1. For your safety ...................................................2-2

2.2. For the safety of the de vices ........................................2-5

3. Start-up ..........................................................3-1

3.1. Con trol sys tem ...................................................3-2

3.1.1. Key as sign ment .........................................3-2

3.1.2. Flow chart..............................................3-3

3.2. Switching on the dryer .............................................3-4

3.2.1. Op er a tion sta tuses.......................................3-4

3.3. Viewing the soft ware-ver sion........................................3-5

3.4. Pass words.......................................................3-5

3.5. Ba sic pa ram e ters .................................................3-7

3.5.1. Turn ing the de vices on/off .................................3-7

3.5.2. En tering dryer val ues.....................................3-9

3.5.3. En tering hop per val ues ..................................3-11

3.5.4. Ob serving pro cess ing sta tus..............................3-13

3.5.5. Set ting date and time....................................3-14

3.5.6. Viewing/chang ing lan guage and con trast ...................3-15

3.5.7. Changing pa ram e ters ...................................3-16

3.5.8. Set ting the timer ........................................3-17

3.6. Starting con tin u ous op er a tion ......................................3-18

3.7. Viewing sys tem runtime ...........................................3-19

3.8. Switching the dryer off ............................................3-20

4. Er ror and er ror cor rec tion ..........................................4-1

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STT 300

5. Main te nance .....................................................5-1

5.1. Main te nance in ter vals .............................................5-3

5.2. Cleaning/re new ing the air fil ters .....................................5-4

5.3. Ten sioning the V-belts .............................................5-8

5.4. Dis posing of the dry ing agent ......................................5-10

5.5. Ser vicing the ac ces so ries .........................................5-10

5.6. Changing the bat tery of the con trol sys tem ...........................5-11

5.6.1. Re setting the con trol val ues ..............................5-13

6. Func tional de scrip tion .............................................6-1

6.1. Dryer ...........................................................6-2

6.2. Drying hop per (op tional) ...........................................6-3

6.3. Re turn air cooler (op tional) .........................................6-4

6.4. Hop per heat ers (op tional) ..........................................6-5

6.5. Au to matic mo tor flaps (op tional) .....................................6-5

6.6. Con nec tion to a pneu matic con vey ing sys tem (op tional) .................6-5

7. Trans port, As sem bly and Stor age ...................................7-1

7.1. Trans port and Packing .............................................7-2

7.2. As sem bly........................................................7-4

7.3. Stor age .........................................................7-4

8. As sem bly in struc tions .............................................8-1

8.1. Mount ing of the suc tion de vice for re gen er a tion ex haust air ..............8-2

8.2. Con nec tion of the air cool ers (op tional) ...............................8-2

8.3. Elec tri cal con nec tion ..............................................8-3

9. Tech ni cal Data ....................................................9-1

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STT 300

10. Spare parts list .................................................10-1

10.1. Switching Cab i net and Op er ating Unit ..............................10-4

11. Elec tri cal manual ................................................11-1

o Con nec tion di a gram no.: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

o Cur rently not avail able; will be de liv ered at a later date!

12. Ac ces so ries ....................................................12-1

o En tering val ues on the OP 7 / 17

o Flap con trol with Fuzzy-Logic

o Elektror High-pres sure blower with fre quency con verter op er a tion

o Elektror High-pres sure blower

o _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

o _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

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6

1. Ge ne ral In for ma ti on

The se ope ra ting in struc tions are ad dres sed to all users of the de vi ce.

De hu mi di fied Air Dry er

»

The se ope ra ting in struc tions must be used by every per son char ged with
work on the unit.

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Ge ne ral In for ma ti on 1-1

De hu mi di fied Air Dry er

1.1. War nings and sym bols

The fol lo wing war nings and sym bols are used in the se ope ra ting in struc tions:

This sym bol in di ca tes dan ger to life! Fa tal or se ri ous in ju ry is pos si ble if the
cor re spon ding in struc tions, re gu la tions or war nings are not ob ser ved.

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L

F

&

$

This sym bol in di ca tes that se ri ous in ju ry is pos si ble if the cor re spon ding
in struc tions, re gu la tions or war nings are not ob ser ved.

This sym bol in di ca tes that ex ten si ve da ma ge to equip ment is pos si ble if
the cor re spon ding in struc tions, re gu la tions or war nings are not ob ser ­ved.

This sym bol in di ca tes in for ma ti on im por tant for be co ming fa mi li ar with
the equip ment, i.e. tech ni cal cor re la tions.

This sym bol in di ca tes that a tech ni cal term is ex plai ned at this point.

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Ge ne ral In for ma ti on 1-2

De hu mi di fied Air Dry er

1.2. Ex pla na tions and in for ma ti on

Va ri ous terms and de sig na tions are used in the se ope ra ting in struc tions to en su re cla ri ty. The re ­fo re plea se note that the terms used in the text stand for the cor re spon ding ex pla na tions lis ted be ­low.

Equip ment

•

”Equip ment” can mean an in di vi du al unit, a ma chi ne or an in stal la ti on.

Ope ra ting per son nel

•

The ”ope ra ting per son nel” are per sons ope ra ting the equip ment on their own re spon si bi li ty or ac ­cor ding to in struc tions.

Ope ra tor

•

The ”ope ra tor” of the equip ment (pro duc ti on ma na ger, fo re man, etc.) is the per son re spon si ble for
all pro duc ti on se quen ces. The ope ra tor in structs the ope ra ting per son nel of what is to be done.

Ope ra ting in struc tions

•

The ”ope ra ting in struc tions” des cri be the in ter ac ti on of the equip ment, pro duc ti on se quen ces or
me thods. The ope ra ting in struc tions must be com pi led by the ope ra tor of the equip ment.

Equip ment fo re man

•

When se ve ral ope ra ting per son nel work on one ma chi ne, the ”equip ment fo re man” coor di na tes
the se quen ces. The equip ment fo re man must be ap poin ted by the ope ra tor.

Trai ned per son nel

•

”Trai ned per son nel” are per sons who, due to their trai ning, are aut ho ri zed to car ry out the re qui red
work.

1.3. Le gal ba sis

See “Ma nu fac tu rer’s Cer ti fi ca te” resp. “Cer ti fi ca te of Con for mi ty”.

1.4. Fields of ap pli ca tions

For the dry ing of ther mo plas tic gra nu les and re grind be fo re pro ces sing in or der to re mo ve all re ­mai ning moi stu re from the gra nu les both in si de and out, in de pen dent of cli ma te or am bient air
con di tions.

1.5. No tes on Usa ge

Ex pe rien ced ope ra tors can be gin di rect ly with the chap ter on “Start-up” if the unit has been pro -

•

per ly in stal led.

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If the unit has not been in stal led yet, ob ser ve the in struc tions in the chap ter on “As sem bly In struc -

•

tions” and “Trans port, As sem bly and Sto ra ge”.

Ge ne ral In for ma ti on 1-3

2. Sa fe ty in struc tions

The se sa fe ty in struc tions ap ply to all per sons wit hin the ran ge of ac ti on of the
equip ment.

»

Plea se in form all per sons wit hin the ran ge of ac ti on of the equip ment of the
di rect and in di rect ha zards con nec ted with the equip ment.

The se ope ra ting in struc tions are to be used by all per sons as sig ned ac ti vi ­ties con nec ted with the equip ment.

Knowled ge of the En glish langua ge is pre re qui si te.

En su re in each case that the ope ra ting per son nel are fa mi li ar with the ope ra ­ting in struc tions and the functi on of the equip ment.

De hu mi di fied Air Dry er

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Sa fe ty in struc tions 2-1

De hu mi di fied Air Dry er

2.1. For your sa fe ty

Ge ne ral

The ope ra ting per son nel of this equip ment must be at least 16 ye ars old.

Plea se read the se ope ra ting in struc tions ca re ful ly be fo re ta king into ope ra ti on for the first time.
Con tact us should que stions ari se. This avoids in ju ry and da ma ge to equip ment!

The se ope ra ting in struc tions must be kept avai la ble at all ti mes at the pla ce of ope ra ti on of the
equip ment. Im pro per ope ra ti on re sults in dan ger of ac ci dents!

Plea se note that, for rea sons of cla ri ty, not all con cei va ble ca ses re gar ding ope ra ti on or main ten ­an ce of the equip ment can be co ver ed in the se ope ra ting in struc tions.

Plea se ob ser ve all sa fe ty in struc tions and war nings on the equip ment. This avoids in ju ry and da ­ma ge to equip ment!

All work on the equip ment is to be car ried out by per sons who se qua li fi ca tions are spe ci fied in the
per tai ning chap ters of the ope ra ting in struc tions. Im pro per ope ra ti on re sults in dan ger of ac ci ­dents!

The pro per wor king clot hes are to be worn du ring any work on the equip ment. This avoids in ju ry!

The lo cal re gu la tions and re qui re ments per tai ning to this equip ment must be ob ser ved.

Dis con nect elec tri cal com po nents from the mains supp ly be fo re work is car ried out on the se com ­po nents Cau ti on: Dan ger to life through elec tri cal shock!

Com pi le de tai led ope ra ting in struc tions ba sed on the se Ope ra ting in struc tions for the se quen ce
of pro ce du res to be car ried out on this equip ment. Im pro per ope ra ti on re sults in dan ger of ac ci ­dents!

Ob ser ve that the con trol sys tem is still un der vol ta ge even when the main switch is swit ched off.
Cau ti on: Dan ger to life through elec tri cal shock!

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Sa fe ty in struc tions 2-2

De hu mi di fied Air Dry er

As sem bly

Com pa re the con nec ted lo ads with tho se of the mains supp ly. Dan ger of in ju ry through elec tri cal
shock!

When using lif ting gear, plea se ob ser ve the per tai ning re gu la tions. Cau ti on: Dan ger of ac ci dents!

Do not mo di fy, add ot her equip ment or chan ge the de sign of the equip ment wit hout the ap pro val
of the ma nu fac tu rer. Cau ti on: Dan ger of ac ci dents!

At tach ments not supp lied by Sterlingmust be ma nu fac tur ed in ac cor dan ce with sa fe ty re gu la ti on
EN 294. Dan ger of ac ci dents!

The equip ment may only be ope ra ted when all the as so cia ted com po nents are pro per ly con nec ­ted up and in ac cor dan ce with the re le vant re gu la tions. This avoids in ju ry and da ma ge to equip ­ment!

Ope ra te the de vi ce only if all its com po nents are groun ded. Dan ger: ac ci dent through elec tri cal
shock!

Plea se note for in stal la ti on that the equip ment is top-he avy. Dan ger exists that it may topp le over!

Take care that the de vi ce is not stan ding on the mains ca ble. This will pre vent dan ger to peo ple
and ma te ri al!

Ope ra ti on

Ap point an equip ment fo re man to be re spon si ble for the equip ment.

En su re that the ope ra ting per son nel are pro vi ded de tai led in struc ti on in the ope ra ti on of the
equip ment. Im pro per ope ra ti on re sults in dan ger of ac ci dents!

When the main switch is swit ched off for rea sons per tai ning to sa fe ty, it must be se cu red against
un aut ho ri zed ac ti vat ion. Cau ti on: Dan ger of ac ci dents!

Re pair work may be car ried out by trai ned per son nel only. Cau ti on: Dan ger of ac ci dents!

Ne ver ope ra te the equip ment when parti al ly dis mant led! Dan ger! Limbs may be caught in ma chi ­ne ry! Elec tric shock!

In case of mal functi on, shut down the equip ment im me di ate ly. Have mal functions cor rec ted im ­me di ate ly. Dan ger of ac ci dents!

The ma chi ne is in ten ded only for the dry ing of gra nu la ted plas tics. Any ot her or ad di tio nal use is
con tra ry to spe ci fi ca tions.

This equip ment is not suit ab le for food pro ces sing.

The sa fe ty in struc tions of the con nec ted ma chi nes must be fol lo wed.

Plea se note that sound le vels ex cee ding 85 db(A) may in the long term da ma ge your he alth. Use
the ap pro pria te ear muffs. This avoids im pair ment of hea ring!

Plea se note that the dry ing cells, dry ing hop pers and air pi pings grow hot du ring use. Avoid tou ­ching any of the se parts! Dan ger: In ju ry through burns!

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Ne ver ope ra te the dry er wit hout side pa nels. Dan ger: Limbs may be caught in ma chi ne ry! In ju ry
through burns!

Sa fe ty in struc tions 2-3

De hu mi di fied Air Dry er

When dry ing plas tics which emit ga ses dan ge rous for hu man he alth, take care that the re ge ne ra ­ti on ex haust air is dis po sed of wit hout pol lu ting the en vi ron ment. This will pre vent dan ger to peo ­ple and ma te ri al!

Op er ate the dryer only if there is at least one dry ing hop per op er at ing. This will pre vent dam age of
ma te rial!

Main ten an ce

Be fo re star ting main ten an ce work, ap point a su per vi sor.

In form the re spon si ble per son nel be fo re main ten an ce work on the sys tem is start ed. Cau ti on:
Dan ger of ac ci dents!

Dis con nect the equip ment from mains supp ly be fo re star ting main ten an ce pro ce du res to en su re
that it can not be swit ched on un in ten tio nal ly. Cau ti on: Dan ger of ac ci dents!

All pi pes, ho ses and scre wed con nec tions should be che cked re gu lar ly for le aks and da ma ge.
Any faults which ari se should be cor rec ted im me di ate ly. Dan ger of ac ci dents!

De pres su ri se all com pres sed air pi ping be fo re star ting main ten an ce work. Dan ger of ac ci dents!

The air fil ters should only be clea ned/re pla ced when the the main switch is off and the blo wer has
stop ped. This avoids in ju ry and da ma ge to equip ment!

Any main ten an ce work on the equip ment should only be start ed when the the main switch is off
and the blo wer has stop ped. This avoids in ju ry and da ma ge to equip ment!

Check the v-belts of the blo wer only when the main switch is swit ched off and the blo wers have
stop ped. Cau ti on: Dan ger of ac ci dents!

Open dry ing hop pers only if they are com ple te ly emp ty. Dan ger of ac ci dents!

Ne ver open dry ing hop pers whi le the de vi ce is in ope ra ti on. Dan ger: Iin ju ry through burns!

Open dry ing hop pers only if they have been coo led down suf fi cient ly. Dan ger: In ju ry through
burns!

Be fo re star ting main ten an ce work wait un til the dry ing cells, dry ing hop pers and air pi pings have
been coo led down suf fi cient ly. Avoid tou ching any of the se parts! Dan ger: In ju ry through burns!

Re mo ve any gra nu les re mai ning on the ground. Dan ger of ac ci dents!

Ar rest the wheels af ter in stal la ti on if the dry er is moun ted on a mo va ble fra me. This will pre vent
dan ger to peo ple and ma te ri al!

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Sa fe ty in struc tions 2-4

De hu mi di fied Air Dry er

2.2. For the sa fe ty of the de vi ces

Ne ver chan ge set tings wit hout ca re ful ly as ses sing the con se quen ces.

Use only ori gi nal Sterlingspare parts.

Ob ser ve the main ten an ce in struc tions.

Keep a re cord of all main ten an ce works and re pairs.

Plea se note that elec tro nic com po nents can be da ma ged by sta tic disch ar ge.

Be fo re in iti al ope ra ti on and in re gu lar in ter vals, make sure that no elec tri cal con nec tions are loo ­se.

Ne ver re ad just sen sors wit hout ex act ly kno wing their functions.

Plea se en su re that the per mit ted sto ra ge tem pe ra tu re lies bet ween -20 and +55 °C
(-4 to +131 °F).

Plea se en su re that the per mit ted ope ra ti on tem pe ra tu re lies bet ween 0 and +45 °C
(32 to +113 °F).

Check the di rec ti on of ro ta ti on of the blo wers af ter the elec tri cal con nec tions have been made
(see ro ta tio nal di rec ti on ar row).

Cle an the dry ing hop pers be fo re the first fil ling.

Note the in struc tions of the ma te ri al ma nu fac tu rer for the ma xi mum dry ing tem pe ra tu re.

Note the dry ing in struc tions of the ma te ri al ma nu fac tu rer.

Take care that the dry ing hop pers are al ways com ple te ly fil led and that the re ten ti on pe ri od is re ­spec ted if con ti nu al re mo val is ta king pla ce.

Note that too lar ge amounts ta ken from the dry ing hop per lead to in suf fi cient dry ing of the ma te ri ­al.

Clo se the air stop val ves of dry ing hop pers which are emp ty or have not been used.

Note down all data which you have en te red into the con trol sys tem.

The pass word is to be en trus ted to aut ho ri sed per son nel only.

Plea se note that the tem pe ra tu re of the dry er hea ting sys tem must al ways be set lo wer than that of
the supp le men ta ry hea ters.

When you dis po se of dry ing agents, ob ser ve all of fi ci al ru les.

Note that dry ing cells are re pla ced or re fil led by Ster ling only if they are emp ty.

The ma te ri al le vel may not fall be low 40 % in the dry ing hop per, when ma te ri al is con ti nu ous ly re ­mo ved from the dry ing hop per, but no ma te ri al is con ti nu ous ly fed into the dry ing hop per (batch
dry ing). Clo se the thrott le val ves.

Read the ope ra ting ma nu als of the con nec ted de vi ces.

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Sa fe ty in struc tions 2-5

3. Start-up

Version: 64.10-8266GB01 05/02

This chap ter is di rec ted at the ope ra tors of the equip ment.

STT 300

»

F

This chap ter as su mes ge ne ral skills in dea ling with dry ing sys tems and SPS
(PLC) con trol units.

This chap ter as su mes that the functio nal des crip ti on has been read and un ­ders tood.

It should be en su red in each and every case that the ope ra tors have the re le ­vant skills.

Note down all set values of the control system.

Make sure that the cooling appliance is connected to the mains socket in
the electrical cabinet (if present, optional).

Make sure that any condensate penetrating from the cooling appliance
(optional) does not get inside the dryer or the control box.

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If the in side tem per a ture of the switch cab i net is above +50°C(122°F),
the dryer is switched off af ter 30 min utes if it is op er ated with a cool ing ap ­pli ance (op tional).

Start-up 3-1

STT 300

3.1. Control system

The control system is switched on at the main switch. The control system is operated via a
”selection window” and the keyboard of the operator panel.

The facility’s control system is factory-programmed. Nevertheless, you have to set specific
values (basic parameters) which are dependent on the processed material, for instance.

The values entered are stored in the control system and remain so, even after the unit is switched
off or in the event of a power cut. All messages are displayed in plain text.

In describing this start-up, we have assumed that the various sub-menus are selected from the
”table of contents”.

This structure of the description has been selected since, in most cases, you will only work on one
item in the ”submenu”.

If you want to work on several ”submenu” items in succession, you can select the individual items
directly by means of the arrow keys.

3.1.1. Key assignment

F1-key: Leads to the table of contents.

ENTER-key: Confirms the entries.

ESC-key: Goes back one step in the menu.

ACK-key: Activates an alarm message; to unblock the control system.

Arrow keys: Move the cursor bar;

switch the appliances on or off in combination with the SHIFT key;
for scrolling forward or backward in a menu.

SHIFT-key: Switches on the secondary functions of the keys,

when the SHIFT-key has been pushed, the LED “SHIFT” is on.

HELP-key: Viewing additional texts,

when additional texts can be viewed the LED “HELP” is on.

LED “ALARM”: flas hes in case of an er ror;

is on if the er ror has been ack nowled ged but not yet
eli mi na ted; is off if the re are no er rors

&

LED = light emitting diode

An additional alarm device (horn or lamp) can be connected (optional).

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Start-up 3-2

3.1.2. Flow chart

STT 300

3

2 1
2

3

1 Indicator lamp
2 Valve system
3 Drying chamber
4 Drying blower
5 Return air filter
6 Drying hopper
7 Drying heater
8 Regeneration heater
9 Regeneration blower
10 Regeneration air filter

Indicator lamp messages:

Green continous light: in process
Red continous light: alarm

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Start-up 3-3

3.2. Switching on the dryer

Switch on the system by means of the main switch.

STT 300

&

The control system carries through a self-test; after that, the name of the
dryer and the operation status of the unit are displayed.

Unblock the control system:
Keep the ACK key pressed until the LEDs of the keys K1 - K4 light up.

F

3.2.1. Operation statuses

The following operation statuses can be displayed:

system is off

•

system is on

•

blower runs on

•

valve block

•

regeneration will be finished in x min.

•

516-2MS

Start-up 3-4

3.3. Vie wing the soft wa re-ver si on

Press the “±”-key.

STT 300

&

3.4. Passwords

The entry of a password prevents unauthorised persons from having access to the data entered
into the control system. Important data can then be entered or modified only after the password
has been entered.

If you make no entries for more than 10 minutes, the access is blocked and you have to re-enter
the password.

password level 6: 79 21 54

•

The soft wa re-ver si on will be dis play ed.

Tell the password only to authorised persons.

F

Press the ”Shift”-key and the ”K4”-key.

Press 3 x the “â” key.

Press the ”F3”-key.

516-2MS

Start-up 3-5

Login

Press the key “F2".
En ter the pass word.
Press the ENTER key.

STT 300

&

Press the ESC key.

Logout
Press the key “F3".

&

Press the “â“ key.

Edit

Press the key “F2".

If the pass word has been en tered cor rectly, the cor re spond ing pass word
level is dis played.

You can now en ter data into the con trol sys tem or mod ify data which have
al ready been en tered.

Only data for which no pass word is nec es sary (= pass word level 0) can
now be en tered into the con trol sys tem or mod i fied.

&

Press the ”F1"-key.

516-2MS

This func tion is avail able only for pass word level 9.
Pass words and pass word lev els can be mod i fied or en tered.
Con firm your en tries by means of the ENTER key.

Start-up 3-6

3.5. Basic parameters

Press the ”F1"-key.

3.5.1. Turning the devices on/off

Select ”Main menu”.
Acknowledge with the ENTER-key.

or

Press the ”F2”-key.

Dryer on/off

”on” = turn dryer on, ”off” = turn dryer off.
Acknowledge with the ENTER-key.

Timer on/off

Press the SHIFT-key and choose with the arrow-keys the desired operation:
”internal” = operation with timer (operation at OP7, see chapter timer),
“external” = operation with timer (if present),
”off” = operation without timer.
Acknowledge with the ENTER-key.

STT 300

&

Press the “â” key.

&

Re turn air coo ler on/off

“on” = ope ra ti on with re turn air coo ler, “off” = ope ra ti on wit hout re turn air coo ler
Ack nowled ge with the EN TER-key.

Press the “â” key.

516-2MS

The timer is only operating, when the dryer is switched on.

If the unit ope ra tes with a re turn air coo ler (op tio nal):

Start-up 3-7

Hop per X on/off (X = num ber of the dry ing hop per)

“on” = re lea sing dry ing hop per X, “off” = bloc king dry ing hop per X
Ack nowled ge with the EN TER-key.

Hop per hea ter X on/off (X = num ber of the hop per hea ter)
“on” = switch on hop per hea ter X, “off” = switch off hop per hea ter X
Ack nowled ge with the EN TER-key.

Press the ”F1"-key.

STT 300

516-2MS

Start-up 3-8

STT 300

3.5.2. Entering dryer values

Select ”Dryer”.
Acknowledge with the ENTER-key.

or

Press the ”F3”-key.

Regeneration Heater Act.

The regenerated heat temperature will be displayed.

Used air Act.
The current temperature of the used air will be displayed.

Press the “â” key.

Dew point max.

En ter the max i mum per mis si ble (worst al lowed) dew point tem per a ture (-35 to 28 °C) (-31 to

82.4°F).
Ac knowl edge with the EN TER-key.

Dew point Act.

The cur rent dew point tem pe ra tu re will be dis play ed.

&

Press the “â” key.

516-2MS

If there is a ca ble break “+0 °C” (32°F) is dis played.

Start-up 3-9

STT 300

&

Re turn air cooler Tar get
En ter the max. per mis si ble re turn air tem per a ture (65 °C max.) (149°F). Higher tem per a tures are
not al lowed. Ac knowl edge with the EN TER-key.

Return air cooler Act.
The current return air temperature will be displayed.

&

If the unit ope ra tes with a re turn air coo ler (op tio nal):

The cooling effect of the return air cooler is highly dependent on the
cooler circuit.

The lower the value chosen for the return air temperature, the better the
efficiency of the drying cells.

Plan the size of the coolant circuit accordingly.

F

Press the ”F1"-key.

516-2MS

Start-up 3-10

STT 300

3.5.3. Entering hopper values

Select ”Hopper”.
Acknowledge with the ENTER-key.

or

Press the ”F4”-key.

Hopper entry X Target

(X = number of the drying hopper)
Enter the drying temperature for hopper flap X (when operating with supplementary heating).

Acknowledge with the ENTER-key.

Hopper entry X Act.

(X = number of the drying hopper)
The current temperature at the feed opening of hopper flap X will be displayed.

&

F

Press the “â” key.

If there is a ca ble break “+0 °C” (32°F) is dis played.

The lowest drying temperature setting of the hopper flap must be the
same as or higher than the drying temperature.

516-2MS

Start-up 3-11

STT 300

&

Gran ules X
target: _ % = _ °C

(X = num ber of the dry ing hop per)
En ter the ma te rial tem per a ture at which the flap (op tional) on the dry ing hop per X should close.
Con firm with the ENTER key.

&

Gran ules X
act.: _ °C

(X = num ber of the dry ing hop per)
The cur rent ma te rial tem per a ture in the dry ing hop per X is dis played in °C (op tional, if there is a
flap).

If the unit ope ra tes with mo tor flaps (op tio nal):

This value is en tered in per cent of the tem per a ture on the hop per in let.

The ma te rial tem per a ture cal cu lated by the con trol sys tem for clos ing the
flap on the dry ing hop per X is dis played in °C.

Press the ”F1"-key.

516-2MS

Start-up 3-12

3.5.4. Observing processing status

Select ”Status”.
Acknowledge with the ENTER-key.

or

Press the ”K1”-key.

STT 300

&

Press the “F1"-key.

The current operation status of individual assembly parts is displayed:

e.g.: valve block moved in/moved out/error

“moved in” = The upper drying cells are within the drying circuit; the lower
ones are regenerated.
“moved out” = The upper drying cells are regenerated; the lower ones are
within the drying circuit.
“error” = An error has occurred.

Other operation statuses:
“on” = in operation,
“off” = out of operation,
“open” = opened,
“shut” = closed.

516-2MS

Start-up 3-13

3.5.5. Setting date and time

STT 300

&

Press the “K3"-key.
Enter the password if requested.

Date

Press the SHIFT key.
By means of the arrow keys, select the desired week-day.
By means of the arrow keys, select the shown date.
Press the SHIFT key.
Enter the desired date.
Press the ENTER key.

Time

Enter the desired time.
Press the ENTER key.

Press the ”F1”-key.

This function is password protected.

516-2MS

Start-up 3-14

3.5.6. Viewing/changing language and contrast

STT 300

&

Press the “K4"-key.
Enter the password if requested.

Contrast

Press the SHIFT key.
By means of the arrow keys, select the adjustment which suits you best.
Press the ENTER key.

&

Language

Press the SHIFT key.
By means of the arrow keys, select the desired language (if present).
Press the ENTER key.

This function is password protected.

Depending on the outside temperature, the brightness of the screen may
vary.

Press the “F1"-key.

516-2MS

Start-up 3-15

3.5.7. Changing parameters

Select ”Parameters”.
Acknowledge with the ENTER-key.

or

Press the SHIFT-key and the ”K1”-key.

Run on time
dry ing blower

-- 300 sec.

Stan dard set ting: 300 sec onds, changes only af ter con tact ing SterlingService.

Press the “â” key.

Pa ra me ters

STT 300

The values in this menu may only be changed after contacting
SterlingService.

F

Press the ”F1"-key.

516-2MS

Start-up 3-16

3.5.8. Setting the timer

Select ”Timer”.
Acknowledge with the ENTER-key.

or

Press the SHIFT-key and the ”F1”-key.

XX ON 00:00 OFF 00:00 (XX = day Mo-Su)

Enter for each day the switching on time and the switching off time.
Acknowledge with the ENTER-key.

STT 300

&

Press the ”F1"-key.

Ex am ple:

Fr ON 08:00 OFF 23:59
Sa ON 00:00 OFF 23:59
Su ON 20:00 OFF 08:00
Mo ON 00:00 OFF 00:00

The dry er starts on Fri day at 08:00 in the mor ning, runs through wit hout
in ter rup ti on un til sun day at 08:00 and swit ches off. At 20:00 the dry er
starts again and swit ches off on Mon day at 00:00.

516-2MS

Start-up 3-17

STT 300

3.6. Starting continuous operation

When you have carried through all basic settings, you can start with continuous operation.

Make sure that hoppers which are not in use are separated from the
dehumidified air supply.

F

Make sure that the set drying temperatures are suited for the materials in
the hoppers.

After first filling, do not process the material until after the dwelling time.

If a return air cooler is installed, switch on the coolant circuit of the return
air cooler.

Make sure that the cooling appliance is connected to the mains socket (if
present, optional).

Check setting of the timer.

Select ”Main menu”.
Acknowledge with the ENTER-key.

or

Press the ”F2”-key.

Select ”Dryer on”.

Acknowledge with the ENTER-key.

516-2MS

Start-up 3-18

3.7. Viewing system runtime

Select ”System runtime”.
Acknowledge with the ENTER-key.

or

Press the SHIFT-key and the ”F2”-key.

Sys tem runtime
PLC X.XX h
r.-blwr. X,XX h
m.-blwr. X.XX h

STT 300

&

The runtime of the blowers and the PLC (SPS) is shown in hours.

516-2MS

Start-up 3-19

3.8. Switching the dryer off

Select ”Main menu”.
Acknowledge with the ENTER-key.
or
Press the ”F2”-key.

Select ”Dryer off”.
Ack nowled ge with the ENTER-key.

STT 300

L

F

Wait until the regeneration phase is finished and the blower has come to
a standstill.

Switch off the dryer at the main switch.

Disconnect the power supply.

Never switch off the dryer directly at the main switch.

516-2MS

Start-up 3-20

4. Er ror and er ror cor rec ti on

This chap ter is di rec ted at the ope ra tors of the equip ment.

De hu mi di fied Air Dry er

»

This chap ter as su mes ge ne ral skills in dea ling with dry ing sys tems and SPS
(PLC) con trol units.

This chap ter as su mes that the “start-up” des crip ti on has been read and un ­ders tood.

It should be en su red in each and every case that the ope ra tors have the re le ­vant skills.

516-2MS

Er ror and er ror cor rec ti on 4-1

De hu mi di fied Air Dry er

&

F

Alarm mes sa ges are dis play ed in plain langua ge on the screen of the
ope ra tor de vi ce.

The dis play of alarm mes sa ges in the ope ra tor de vi ce can only be era sed
by pres sing the ”ACK” key. The fai lu re is not re pai red.

A fai lu re is gi ven by flas hing of the LED “alarm”. If the alarm mes sa ge is
ack nowled ged by pres sing of the “ACK” key, but the fai lu re is not yet eli ­mi na ted, the flas hing chan ges to stea dy light.

If a coo ling ap pli an ce is pre sent: If the tem pe ra tu re in si de the switch box
is hig her than +50 °C, the lamp ”alarm - tem pe ra tu re in si de switch box”
goes on. If the tem pe ra tu re is still too high af ter 30 mi nu tes, the dry er is
swit ched off.

Fai lu res must be re pai red im me di ate ly.

LED “ALARM”:
flas hes in case of an er ror;
is on if the er ror has been ack nowled ged but not yet eli mi na ted;
is off if the re are no er rors

Press the ”K2"-key.

516-2MS

Er ror and er ror cor rec ti on 4-2

De hu mi di fied Air Dry er

View

Press the ”F2"-key.

All alarm mes sa ges with their num bers (see Texts), date, time and the supp le ment ”K”, ”G”, or ”Q”
are dis play ed.

&

Press the ESC-key.

Print (Op tio nal)

&

”K” = co ming (a fai lu re oc cu red)
Pres sing the “à”-key dis plays the alarm mes sa ge in plain text.

”G” = going (the re sent for the fai lu re has gone)

”Q” = re set (the dis play of the alarm mes sa ge in the ope ra tor
de vi ce has been era sed by pres sing the ”ACK”-key)

This functi on is pass word pro tec ted.

Make sure that a prin ter is con nec ted and swit ched on.

F

Press the ”F3"-key.

The alarm mes sa ges are prin ted.

Press the “â”-key.

516-2MS

Er ror and er ror cor rec ti on 4-3

Num ber
Press the ”F2"-key.

To tal mes sa ges

The num ber of all alarm mes sa ges is dis play ed.

Wai ting mes sa ges

The num ber of cur rent alarm mes sa ges is dis play ed.

Press the ESC-key.

De le te
Press the ”F3"-key.

De hu mi di fied Air Dry er

&

Press the EN TER-key for de le ting the mes sa ges.

Press the ESC-key.

Press the “â”-key.

This functi on is pass word pro tec ted (Sterlingservice).

516-2MS

Er ror and er ror cor rec ti on 4-4

Over flow
Press the ”F2"-key.

De hu mi di fied Air Dry er

&

Over flow war ning On/Off

Press the SHIFT-key.
By me ans of the ar row keys, se lect ”on” if a war ning mes sa ge is to be gi ven.
By me ans of the ar row keys, se lect ”off” if no war ning mes sa ge is to be gi ven.

Press the EN TER-key.

If the re are more cur rent alarm mes sa ges than can be sa ved, a war ning
mes sa ge (= re si du al buf fer rea ched) may be gi ven.

This functi on is pass word pro tec ted (Sterlingservice).

If the over flow war ning mes sa ge is gi ven, press the ACK-key. De le te the
alarm mes sa ges.

F

Press the ESC-key.

516-2MS

Er ror and er ror cor rec ti on 4-5

De hu mi di fied Air Dry er

Text

Press the ”F3"-key.

All pos si ble alarm mes sa ges are dis play ed with their num bers (see Vie wing).

For vie wing the pos si ble alarm mes sa ges, press the ar row keys:

PLC (= SPS) Bat te ry is Emp ty

Re pla ce the SPS bat te ry.

Main Switch is Off

The main switch has been pla ced in the off po si ti on.
The sa fe ty tem pe ra tu re li mi ter of the dry ing or the re ge ne ra ti on hea ter, re spec ti ve ly, has been ac ­ti vat ed.
The sa fe ty tem pe ra tu re li mi ter of a hop per hea ter has been ac ti vat ed.
Er ror val ve block.

Check the sa fe ty tem pe ra tu re li mi ter.
Check the po si ti on of the val ve block.

A Sa fe ty Tem pe ra tu re Li mi ter has been Ac ti vat ed

Check the sa fe ty tem pe ra tu re li mi ter of the dry ing, re ge ne ra ti on, or hop per hea ter, re spec ti ve ly.

Fil ter Door is Open
The side pa nels to the air fil ters are open.

As sem ble side pa nels.

The Sa fe ty Switch Re ge ne ra ti on Blo wer Has Been Ac tua ted

Check the blo wer.
Check the fu ses.
Short cir cuit check of the blo wer.

Va cu um Re ge ne ra ti on Blo wer

The re ge ne ra ti on blo wer does not pro du ce suf fi cient pres su re.

Check the blo wer.
Va cu um sen sor de fec ti ve.

The Sa fe ty Switch Dry ing Blo wer Has Been Ac tua ted

Check the blo wer.
Check the fu ses.
Short cir cuit check of the blo wer.

Va cu um Dry ing Blo wer

516-2MS

The dry ing blo wer does not pro du ce suf fi cient pres su re.

Er ror and er ror cor rec ti on 4-6

Check the blo wer.
Va cu um sen sor de fec ti ve.

Tem pe ra tu re Mea su re ment Re ge ne ra ti on Hea ter De fec ti ve

Check the ca bles and the sen sor.
Check the po wer supp ly.
Short cir cuit check.

Ex cess Tem pe ra tu re Re ge ne ra ti on Hea ter

The re ge ne ra ti on tem pe ra tu re is too high.

Check the sa fe ty tem pe ra tu re li mi ter.
SterlingService.

In suf fi cient Tem pe ra tu re Re ge ne ra ti on Hea ter

The re ge ne ra ti on tem pe ra tu re is too low.

Check the re ge ne ra ti on hea ter.

The Sa fe ty Switch Re ge ne ra ti on Hea ter Has Been Ac tua ted

Check the hea ter.
Check the fu ses.
Short cir cuit check of the hea ter.

De hu mi di fied Air Dry er

Er ror By pass Flap

The by pass flap does not clo se or clo ses too slowly.

Check the by pass flap.

Er ror Val ve Block

The val ve block has not rea ched the pro per po si ti on. The main switch is pla ced in the off po si ti on.

Check the po si ti on of the val ve block. Press the “ACK” key and put the main switch in the on po si ti ­on im me di ate ly. If the val ve block has not rea ched the cor rect po si ti on wit hin 1 mi nu te, the main
switch is again pla ced in the off po si ti on.

SterlingService.

Tem pe ra tu re Mea su re ment Out going Air De fec ti ve

Check ca bles and sen sor.

Tem pe ra tu re Mea su re ment Re turn Air De fec ti ve

Check ca bles and sen sor.

Ex cess Tem pe ra tu re Re turn Air

516-2MS

Check ca bles and sen sor.
Check the re turn air coo ler.

Er ror and er ror cor rec ti on 4-7

Tem pe ra tu re Mea su re ment Dry ing Hea ter De fec ti ve

Check ca bles and sen sor.
Check the po wer supp ly.
Short cir cuit check.

Ex cess Tem pe ra tu re Dry ing Hea ter

The dry ing tem pe ra tu re is too high.

Check the sa fe ty tem pe ra tu re li mi ter.
SterlingService.

In suf fi cient Tem pe ra tu re Dry ing Hea ter

The dry ing tem pe ra tu re is too low.

Check the dry ing hea ter.

Sa fe ty Switch Dry ing Hea ter

Check the hea ter.
Check the fu ses.
Short cir cuit check of the hea ter.

De hu mi di fied Air Dry er

Tem pe ra tu re Mea su re ment Hea ter De fec ti ve Hop per X

(X = num ber of the dry ing hop per)
Check ca bles and sen sor.
Check the po wer supp ly.
Short cir cuit check.

Ex cess Tem pe ra tu re Hea ter Hop per X

(X = num ber of the dry ing hop per)
The tem pe ra tu re of the hop per hea ter is too high.

Check the sa fe ty tem pe ra tu re li mi ter.
SterlingService.

In suf fi cient Tem pe ra tu re Hea ter Hop per X

(X = num ber of the dry ing hop per)
The tem pe ra tu re of the hop per hea ter is too low.

Check the hop per hea ter.

Sa fe ty Switch Hea ter Hop per X

(X = num ber of the dry ing hop per)
Check the hea ter.
Check the fu ses.

516-2MS

Short cir cuit check of the hea ter.

Er ror and er ror cor rec ti on 4-8

Tem pe ra tu re Mea su re ment Gra nu les De fec ti ve Hop per X

(X = num ber of the dry ing hop per)
Check ca bles and sen sor.
Check the po wer supp ly.
Short cir cuit check.

Ex cess Tem pe ra tu re Gra nu les Hop per X

(X = num ber of the dry ing hop per)
The ma te ri al tem pe ra tu re is too high.

Check the hea ter.
Check the thrott le val ve.

Val ve Er ror Hop per X
(X = num ber of the dry ing hop per)
The thrott le val ve does not clo se or clo ses too slowly.

Check the thrott le val ve.

Press the “F1"-key.

De hu mi di fied Air Dry er

516-2MS

Er ror and er ror cor rec ti on 4-9

5. Main ten an ce

This chap ter is in ten ded for per sons with skills in elec tri cal and me cha ni cal
are as due to their trai ning, ex pe rien ce and re cei ved in struc tions.

»

Per son nel using the in struc tions in this chap ter must be in struc ted of the re ­gu la tions for the pre ven ti on of ac ci dents, the ope ra ting con di tions and sa fe ty
re gu la tions and their im ple men ta ti on.

En su re in each case that the per son nel are in form ed.

For main ten an ce work ta king pla ce at heights of over ap prox. 6 feet
(1829mm), use only lad ders or si mi lar equip ment and wor king plat forms in ­ten ded for this pur po se. At grea ter heights, the pro per equip ment for pro tec ­ti on against fal ling must be worn.

Use only suit ab le lif ting gear which is in pro per wor king or der and load sus ­pen si on de vi ces with suf fi cient car ry ing ca pa ci ty. Do not stand or work un der
sus pen ded lo ads!

STT 300

En su re that the elec tric mo tors/switch ca bi nets are suf fi cient ly pro tec ted
against moi stu re.

Use only suit ab le work shop equip ment.

Be fo re star ting main ten an ce work, ap point a su per vi sor.

In form the re spon si ble per son nel be fo re main ten an ce work on the sys tem is
start ed.

Ne ver ope ra te the equip ment when parti al ly dis mant led.

All main te na ce and re pair work not des cri bed in this chap ter, may only be
car ried out by Ster ling ser vice per son nel or aut ho ri zed per son nel (ap poin ted
by Ster ling).

L

516-2MS

Dis con nect the equip ment from mains supp ly be fo re star ting main ten an ­ce pro ce du res to en su re that it can not be swit ched on un in ten tio nal ly.

De pres su ri ze all com pres sed air pi ping of the equip ment be fo re star ting
main ten an ce work.

Main ten an ce 5-1

Plea se ob ser ve the main ten an ce sche du le.

STT 300

F

Be fo re star ting main ten an ce work, cle an the equip ment of oil, fuel or lu ­bri cants.

En su re that ma te ri als and in ci den tals re qui red for ope ra ti on as well as
spa re parts are dis po sed of pro per ly and in an en vi ron men tal ly sound
man ner.

Use only ori gi nal Ster ling spare parts.

Keep re cord of all main ten an ce and re pair pro ce du res.

516-2MS

Main ten an ce 5-2

5.1. Main ten an ce in ter vals

Dai ly: Check war ning signs on equip ment for good

le gi bi li ty and com ple te ness

Cle an re turn air fil ter and hou sing
(de pen ding on amount of dust col lec ted)

Lamp test: if you press the ”+/-”-but ton lon ger than
2 se conds all LED’s must light up

Wee kly: Check functi on of the main switch

Cle an fil ter of the elec tri cal ca bi net
(de pen ding on amount of dust col lec ted)

Month ly: Check V-belt ten si on of blo wer

Every three months: Cle an fil ter of the re ge ne ra ti on blo wer

(de pen ding on amount of dust col lec ted)

Every six months: Ex chan ge re turn air fil ter

(de pen ding on amount of dust col lec ted)

Ex chan ge fil ter of the elec tri cal ca bi net
(de pen ding on amount of dust col lec ted)

STT 300

Check all elec tri cal and me cha ni cal con nec tions for tight fit.

Ye ar ly: Ex chan ge fil ter of the re ge ne ra ti on blo wer

(de pen ding on amount of dust col lec ted

&

F

This main ten an ce sche du le is cal cu la ted for 3-shift ope ra ti on.

The gi ven main ten an ce in ter vals are aver age va lu es.

Check whet her in your in di vi du al case the main ten an ce in ter vals must be
shor te ned.

516-2MS

Main ten an ce 5-3

5.2. Clea ning/re ne wing the air fil ters

Press the ”F2”-key.

Se lect ”Dry er off”.

Ack nowled ge with the EN TER-key.

STT 300

L

F

&

Wait un til the blo wers have stop ped tur ning.

Switch off the dry er at the main switch.

Dis con nect the po wer supp ly.

Open the up per panel by me ans of the pro vi ded switch ca bi net key.

Clog ged fil ters re du ce the vo lu me of cir cu la ting air to a sub stan ti al de ­gree and re sult in de crea sed dry er ef fi cien cy. In ad di ti on, the hea ting ele ­ments may be da ma ged due to clog ged fil ters.

516-2MS

Main ten an ce 5-4

Re turn air fil ter

Loo sen the se cu ring nut on the re turn air fil ter hou sing
and re mo ve the hou sing lid.

Re mo ve the re turn air fil ter.

Cle an the re turn air fil ter with com pres sed air from in ­si de to out or re new the fil ter. Ne ver knock the re turn
air fil ter on the floor.

Cle an the re turn air fil ter hou sing. Use lint-free clea ­ning rags.

Re-in stall the clea ned/new re turn air fil ter.

Mount the lid and fas ten the se cu ring nut.

Clo se the pa nel.

STT 300

Re turn air fil ter Re gen er a tion air fil ter

Fil ter of the elec tri cal cab i net

F

&

STT 300

Ne ver ope ra te the dry er wit hout re turn air fil ter.

The dry er can’t be put into ope ra ti on if the pa nel is not re pla ced.

Or der num ber re turn air fil ter if ope ra ted

with re turn air coo ler: ID 88226

wit hout re turn air coo ler: ID 86378

516-2MS

Main ten an ce 5-5

STT 300

Re ge ne ra ti on air fil ter

Loo sen the se cu ring nut on lid of the re ge ne ra ti on air fil ter.

Re mo ve the lid and re ge ne ra ti on air fil ter hou sing.

Loo sen the two wing nuts.

Re mo ve the cir cu lar grid.

Re mo ve the fil ter mat.

Blow through the fil ter mat with com pres sed air from the in si de to the out si de, or re new the fil ter.

Re-in stall the clea ned/new fil ter.

Re pla ce the cir cu lar grid.

Fas ten the two wing nuts on.

Re pla ce the re ge ne ra ti on air fil ter hou sing and the lid of the re ge ne ra ti on air fil ter.

Fas ten the se cu ring nut onto the re ge ne ra ti on air fil ter.

Clo se the pa nel.

Ne ver ope ra te the dry er wit hout re ge ne ra ti on air fil ter.

F

&

516-2MS

The dry er can’t be put into ope ra ti on if the pa nel is not re pla ced.

Or der num ber fil ter mat: ID 93686

Main ten an ce 5-6

STT 300

Fil ter of the elec tri cal ca bi net

Re mo ve the lid of the fil ter.

Re mo ve the fil ter mat.

Blow through the fil ter mat with com pres sed air from in si de to out si de or re new the fil ter mat.

Cle an the fil ter hou sing. Use lint-free clea ning rags.

Re-in stall the clea ned/new fil ter mat.

Re pla ce the lid of the fil ter.

Ne ver ope ra te the dry er wit hout fil ter mat.

F

&

Or der num ber fil ter mat: ID 87491

516-2MS

Main ten an ce 5-7

5.3. Ten sio ning the V-belts

Press the ”F2”-key.

Se lect ”Dry er off”.

Ack nowled ge with the EN TER-key.

Wait un til the blo wers have stop ped tur ning.

L

Switch off the dry er at the main switch.

Dis con nect the po wer supp ly.

STT 300

blower ”re gen er a tion heater”

blower ”dry ing heater”

F

&

STT 300

Open the up per panel by me ans of the pro vi ded switch ca bi net key.

Or der num ber V-belts blower

”re gen er a tion heater”: ID 93741

”dry ing heater”: ID 94211

516-2MS

Main ten an ce 5-8

Blo wer ”re ge ne ra ti on hea ter” / Blo wer ”dry ing hea ter”

1 2 3

6 5 4 3

STT 300

Re mo ve the pro tec ti ve grid of the blo wer (po si ti on 3).

Loo sen the nut (po si ti on 1).

Loo sen and re mo ve the screw (po si ti on 2).

Sli de mo tor with car rier flan ge pla te (po si ti on 6) to wards the car rier flan ge hou sing (po si ti on 4).

Re mo ve de fec ti ve V-belts (po si ti on 5), put on new ones.

At ten ti on should be gi ven to ex act alignment of the V-belt pul leys.

F

Ad just belt ten si on by screw (po si ti on 2) in ac cor dan ce with the in for ma ti on sti cker.

Tighten the nuts on threa ded bolt (po si ti on 1) again.

Mount the pro tec ti ve grid of the blo wer (po si ti on 2).

Mount the side pa nels.

516-2MS

Main ten an ce 5-9

High-pres su re blo wers with fre quency con ver ter ope ra ti on

Blo wers work wit hout V-belts!

F

5.4. Dis po sing of the dry ing agent

En su re that dry ing cells are ex chan ged by Sterlingor re fil led only when emp ty.

Dry ing agents must be dis po sed of in ac cor dan ce with all of fi ci al re gu la ­tions.

STT 300

Used dry ing agents are to be dis po sed of as ha zar dous was te, as it may
be con ta mi na ted with fo reign sub stan ces from the ma te ri als dried in the
sys tem.

Used dry ing agents or dry ing cells con tai ning used dry ing agent can not
be re tur ned to Ster ling.

F

5.5. Ser vi cing the ac ces so ries

The ope ra ting in struc tions must be fol lo wed.

F

516-2MS

Main ten an ce 5-10

STT 300

5.6. Chan ging the bat te ry of the con trol sys tem

This work may be car ried through only by qua li fied per son nel trai ned in the
field of elec tri cal en gi nee ring.

»

The bat te ry may be chan ged only with the con trol sys tem swit ched on.

F

Open the con trol box by means of the con trol box key which is part of the sup ply.

Open the front door of the CPU.

Pull the ba ckup bat te ry with ca ble out of the com part ment.

Plug the con nec tor of the new ba ckup bat te ry into the cor re spon ding so cket in the bat te ry com part ment of
the CPU.

&

Pla ce the ba ckup bat te ry into the bat te ry com part ment on the CPU.

Clo se the front door of the CPU

Clo se the con trol box.

516-2MS

The notch on the bat te ry con nec tor must point to the left!

Main ten an ce 5-11

STT 300

L

&

Sto re ba ckup bat te ries in a dry and cool pla ce.
Ba ckup bat te ries can be sto red for ap prox. 5 ye ars.
If ba ckup bat te ries are not trea ted pro per ly, they can ig ni te, ex plo de and
cau se se ve re bur ning.

Or der num ber bat te ry: ID 83809

Bat te ries must be dis po sed of in kee ping with the re le vant na tio nal en vi ­ron ment pro tec ti on re gu la tions/gui de li nes.

516-2MS

Main ten an ce 5-12

5.6.1. Re set ting the con trol va lu es

This elec tri cal work is in ten ded to be car ried out only by trai ned per son nel.

»

STT 300

&

Open the con trol box with the switch box key which is part of the supp ly.

Turn the key to the STOP po si ti on.

Turn the key to the MRES po si ti on.

Hold the key in this po si ti on un til the STOP-LED co mes on for the se cond time and re mains on
(this ta kes 3 se conds).

Turn the key to the STOP po si ti on.

Wit hin 3 se conds you must turn the switch back to the MRES po si ti on.

Hold the key un til the STOP-LED flas hes.

&

Clo se the con trol box.

Af ter chan ging the bat te ry or the PLC the con trol va lu es should be re set ­ted.
All con trol va lu es are set back to the stan dard set tings.

When the CPU has com ple ted the re set, the STOP-LED stops flas hing
and re mains lit.

516-2MS

Main ten an ce 5-13

6. Functio nal des crip ti on

This functio nal des crip ti on is in ten ded for all ope ra ting per son nel of the
equip ment.

»

Pre re qui si te for this functio nal des crip ti on is ge ne ral knowled ge of dry ers
and SPS (PLC) sys tems.

En su re in each case that the ope ra ting per son nel are suf fi cient ly in form ed.

STT 300

516-2MS

Functio nal des crip ti on 6-1

STT 300

6.1. Dry er

The dry er ope ra tes with de hu mi di fied air, i.e. the air is not only hea ted but also de hu mi di fied be fo ­re flo wing into the dry ing hop per. This prin ci ple al lows plas tic gra nu les to be dried to a re si du al
moi stu re con tent as low as 0.002 % (PET gra nu la te).

The dry er ope ra tes con ti nu ous ly, i.e. de hu mi di fied and, if ne ces sa ry, hea ted air is pro du ced con ­ti nu ous ly.

The dry er is de sig ned for con ti nu ous ope ra ti on.

F

The dry er ope ra tes with 2 dry ing cells; one of the se cells is al ways in the dry ing cy cle whi le the ot ­her is being re ge ne ra ted (chan ge-over af ter 3 hours).

If a mal functi on oc curs in the dry ing cy cle du ring the pro gram run, re ge ne ra ti on is not in ter rup ted,
but con ti nu es un til the pro gram end has been rea ched. This gua ran tees that 1 re ge ne ra ted dry ing
cells is al ways avai la ble.

The air in si de the switch ca bi net is coo led by a coo ling ap pli an ce for the pro tec ti on of tem pe ra tu ­re-sen si ti ve com po nents (if pre sent, op tio nal).

With the di gi tal ti mer the dry er can be swit ched on and off at set ti mes.

Dew point de pen dent re ge ne ra ti on switch (op tio nal)

The dew point tem pe ra tu re is mo ni to red con ti nu ous ly. The val ve sys tem swit ches to the freshly
re ge ne ra ted dry ing cells only af ter the se lec ted dew point tem pe ra tu re has been rea ched. The hu ­mid dry ing cells are then re ge ne ra ted. Af ter the coo ling time the dry ing cells are rea dy for ope ra ti ­on again. The val ve sys tem swit ches to the freshly re ge ne ra ted dry ing cells only af ter the moi stu ­re con tent of the dry ing cells which are in the dry ing cy cle have rea ched the set point va lue.

516-2MS

Functio nal des crip ti on 6-2

STT 300

6.2. Dry ing hop per (op tio nal)

The ma te ri al is dried in the dry ing hop per. The de hu mi di fied air is for ced through the ma te ri al in
the hop per, col lec ting moi stu re in the pro cess. The dry ing hop per must be di men sio ned ac cor ­ding to its in ten ded use to en su re that the fi nal moi stu re con tent is at tai ned. When the hop per is fil ­led for the first time or at the start of a dry ing pro ce du re, the ma te ri al in the hop per must be dried
com ple te ly be fo re ma te ri al can be re mo ved from the hop per for the first time.

When ma te ri al is con ti nu ous ly re mo ved from the hop per, ma te ri al must also be con ti nu ous ly fed
into the dry ing hop per. The new (moist) ma te ri al is fed into the dry ing hop per from the top and
slowly mo ves downward to ward the ma te ri al suc ti on box. As the ma te ri al mo ves up ward, it is
dried un til its fi nal moi stu re con tent is at tai ned.

To en su re pro per con ti nu ous dry ing, we re com mend that the dry ing hop per al ways is kept com ­ple te ly fil led. Au to ma tic con vey ors, such as the mo dels in clu ded in our de li very pro gram, op ti mi ze
the au to ma ti on of the ma te ri al flow.

When ma te ri al is con ti nu ous ly re mo ved from the hop per, but no ma te ri al
is con ti nu ous ly fed into the dry ing hop per (batch dry ing), the ma te ri al le -

F

vel may not fall be low 40 %.
Clo se the thrott le val ves.

516-2MS

Functio nal des crip ti on 6-3

6.3. Re turn air cooler (op tional)

A re turn air cooler is gen er ally re quired in cases in which the re turn air
tem per a ture is over 65 °C (149°F).

F

A re turn air coo ler im pro ves the ef fi cien cy of the dry ing cells.

The re turn air coo ler re du ces the re turn air tem pe ra tu re to a de fi ned va lue.
The re turn air tem pe ra tu re is set at the ope ra ti on pa nel.

STT 300

&

Re turn air tem pe ra tu re is con ti nu ous ly mo ni to red; the re turn air coo ler is ac ti vat ed only when nee ­ded. If the re turn air tem pe ra tu re ex ceeds the set va lue (e.g. due to in ter rup ti on in the coo ling wa ­ter supp ly or soi ling), an alarm mes sa ge is gi ven.

The re turn air coo ler can be con nec ted to a coo lant cir cuit or to the wa ter mains net work.

The lower the value cho sen for the re turn air tem per a ture, the better the
ef fi ciency of the dry ing cells.

The dryer is au to mat i cally switched off if tem per a ture ex ceeds 80 °C
(176°F).

516-2MS

Functio nal des crip ti on 6-4

STT 300

6.4. Hop per hea ters (op tio nal)

If dif fe ring dry ing tem pe ra tu res are re qui red in the dif fe rent dry ing hop pers, hop per hea ters must
be in stal led on the dry ing hop pers. The dry ing tem pe ra tu re of each dry ing hop per can be set cen ­tral ly at the dry er.

6.5. Au to ma tic mo tor flaps (op tio nal)

Au to ma tic mo tor flaps cut off the dry ing hop per from the dry ing cir cuit as soon as the ma te ri al is
com ple te ly dried. The supp le men ta ry hea ting sys tem is also swit ched off. De hu mi di fied air flows
into the dry ing hop per only af ter new, moist ma te ri al is ad ded to the hop per. This en su res that the
ma te ri al is not da ma ged, and sa ves a con si de ra ble amount of ener gy.

Tem pe ra tu re pro bes at the feed ope ning of the dry ing hop per and in si de the dry ing hop per en ab le
com pa ri son of feed ope ning and ma te ri al tem pe ra tu re, from which the dry ing de gree of the ma te ­ri al can be cal cu la ted.

If the dry ing hop per is to be clea ned or blo cked, the mo tor flap can be clo sed via the dry er. The
supp le men ta ry hea ting sys tem is then au to ma ti cal ly swit ched off.

6.6. Con nec ti on to a pneu ma tic con vey ing sys tem (op tio nal)

The dry er ope ra tes most ef fec ti ve ly in con juncti on with a pneu ma tic con vey ing sys tem. This com ­bi na ti on of dry er and con vey ing sys tem en su res that suf fi cient ma te ri al is al ways fed into the dry ­ing hop per.

Only the amount of ma te ri al re qui red for the pro ces sing ma chi nes used is re mo ved from the hop ­per. This gua ran tees that the fi nal dry ing re sult re mains cons tant.

Sterlingdrying hop pers are avai la ble equip ped with the cor re spon ding flan ge for con nec ti on of a
Sterlingpneumatic con vey or di rect ly ex works.

Suc ti on bo xes can also be de li ver ed with the re qui red num ber of suc ti on tu bes. The se suc ti on bo ­xes were de ve lo ped spe ci al ly for this hop per to pre vent dust and fo reign par ti cles from being aspi ­ra ted into the sys tem.

A de vi ce for con nec ti on to the de hu mi di fied air supp ly line is also avai la ble. Plea se note that the
functi on of this com bi na ti on is dif fe rent from that of the con ven tio nal Ster ling suc tion bo xes.

516-2MS

Functio nal des crip ti on 6-5

7. Trans port, As sem bly and Sto ra ge

This chap ter is in ten ded for all ope ra ting per son nel of the equip ment.

De hu mi di fied Air Dry er

»

Per son nel using the se in struc tions must be in struc ted in the re gu la tions for
the pre ven ti on of ac ci dents, the ope ra ting con di tions and sa fe ty re gu la tions
and their im ple men ta ti on.

En su re in each case that the ope ra ting per son nel are suf fi cient ly in form ed.

Plea se in form all per sons wit hin the ran ge of ac ti on of the equip ment of the
di rect and in di rect ha zards con nec ted with the equip ment.

Plea se ob ser ve all sa fe ty re gu la tions for the ope ra ti on of lif ting equip ment.

516-2MS

Trans port, As sem bly and Sto ra ge 7-1

De hu mi di fied Air Dry er

7.1. Trans port and Pac king

Plea se en su re ade qua te car ry ing ca pa ci ty of the lif ting equip ment.
Note that the dry er sys tem is top-he avy. Risc of topp ling!

»

The equip ment pass a ri go rous ope ra ting test in the fac to ry and are pa cked ca re ful ly to avoid
trans port da ma ge.

Plea se check pac king on de li very for trans port da ma ge.

The in let and disch ar ge flan ges are sea led with plugs, so that no dirt can en ter du ring trans port.
Plugs must be re mo ved be fo re as sem bly.

Pac king ma te ri als should be dis po sed of ac cor ding to en vi ron men tal laws or reu sed.

Only use for trans port of the equip ment a suit ab le lif ting de vi ce (e. g. a fork lift truck or a work shop
cra ne).

Fas ten the trans port ca bles to the eye lets of the con trol ca bi nets.

Trans port must be shock-proo fed and free from vi brat ions.

with a fork lift truck

Push the forks up to the dry er hou sing.

Check that the forks re ach com ple te ly un der the dry er hou sing.

Trans port with a fork lift truck

516-2MS

Trans port, As sem bly and Sto ra ge 7-2

De hu mi di fied Air Dry er

with a work shop cra ne

Check if the eye lets are in stal led on the dry er hou sing.

If this con di ti on is met, fas ten the trans port ca bles to the eye lets.

If this con di ti on is not met, mount the eye lets and then fas ten the trans port ca bles to the eye lets.

Dis as sem ble the eye lets af ter set-up.

Trans port with a work shop cra ne

516-2MS

Trans port, As sem bly and Sto ra ge 7-3

7.2. As sem bly

De hu mi di fied Air Dry er

Plea se en su re ade qua te car ry ing ca pa ci ty of the lif ting equip ment.

»

A spe ci al foun da ti on is not re qui red for in stal la ti on.

The dryer must be in stalled on a level sur face, and may not be ex posed to ex ces sive hu mid ity.
Max i mum per mis si ble am bi ent tem per a ture of the con trol sys tem is 45 °C (113°F).

To fa ci li ta te ser vi cing, in stall the dry er such that it is ac ces si ble from 3 si des. Make sure that the
air fil ters can be chan ged wit hout pro blems. The rear of the dry er can be pla ced against a wall.

To con ser ve ener gy, keep the dis tan ces bet ween dry er, hop per and pro ces sing ma chi ne as short
as pos si ble.

The lo ca ti on of the con trol unit should be cho sen so that a cle ar view of the se pa ra tors is gua ran ­teed from the con trol unit. Thus any mal functions which ari se can be cor rec ted more ea si ly.

Fas ten the trans port ca bles to the eye lets of the con trol ca bi nets. Du ring trans port do not con tact
or push against ot her com po nents with the con trol pa nels.

Check the car ry ing ca pa ci ty of the point of in stal la ti on, par ti cu lar ly if in stal led
on a plat form.

The pla ce se lec ted for in stal la ti on should be as free of vi brat ions as pos si ble.

The main switch must be free ly ac ces si ble.

Ground the equip ment against elec tro sta tic char ging.

7.3. Sto ra ge

The con trol sys tem may only be sto red at tem pe ra tu res from -25 to +55°C (-13 to +131 °F).

Bet ween de li very and ma chi ne com mis sio ning the equip ment should be sto red in a dry, dust-free
and vi brat ion-free room.

516-2MS

Trans port, As sem bly and Sto ra ge 7-4

8. As sem bly in struc tions

Ver si on: 64.10-8248GB01 04/02

These in stal la tion in struc tions are in tended for per sons with skills in elec tri ­cal and me chan i cal ar eas due to their train ing, ex pe ri ence and re ceived in -

»

struc tions.

Per son nel us ing these in stal la tion in struc tions must be in structed in the reg ­u la tions for the pre ven tion of ac ci dents, the op er at ing con di tions and safety
reg u la tions and their
im ple men ta tion.

En sure in each case that the per son nel are in formed.

The in stal la tion in struc tions pro vided in the cor re spond ing op er at ing in struc ­tions ap ply for all con nected equip ment.

Ob serve safety reg u la tions with re gard to lift ing gear han dling

All in stal la tion work must be car ried out with the equip ment dis con nected
from elec tri cal power and com pressed air sup ply.

De hu mi di fied Air Dry er

L

For in stal la ti on work ta king pla ce at heights of over ap prox. 6 feet (1829
mm), use only lad ders or si mi lar equip ment and wor king plat forms in ten ­ded for this pur po se. At grea ter heights, the pro per equip ment for pro tec ­ti on against fal ling must be worn.

Use only suit ab le lif ting gear which is in pro per wor king or der and load
sus pen si on de vi ces with suf fi cient car ry ing ca pa ci ty. Do not stand or
work un der sus pen ded lo ads!

Use suit ab le work shop equip ment.

In stall the equip ment such that all parts are ea si ly ac ces si ble; this fa ci li ­ta tes main ten an ce and re pair work.

F

516-2MS

As sem bly in struc tions 8-1

De hu mi di fied Air Dry er

8.1. Moun ting of the suc ti on de vi ce for re ge ne ra ti on ex haust air

When plas tics are dried which pro du ce ha zar dous ga ses, en vi ron men tal ly sound dis po sal of the
re ge ne ra ti on ex haust air must be pro vi ded. The throughput of the re ge ne ra ti on blo wer may not be
chan ged.

It must be ta ken into con si de ra ti on when in stal ling a dis po sal sys tem (e.g. ex haust sys tem) that
re ge ne ra ti on ex haust air is ex tre me ly hu mid. This may re sult in con den sa ti on wa ter which must
not en ter the dry er again un der any cir cums tan ces.

8.2. Con nec ti on of the air coo lers (op tio nal)

A re turn air cooler is gen er ally re quired in cases in which the re turn air
tem per a ture is over 65 °C (149°F).

F

The re turn air coo ler can be con nec ted to a coo lant cir cuit or the wa ter mains net work.

Ob ser ve the wa ter flow with con nec ti on to wa ter mains net work. The coo lant cir cuit must be di ­men sio ned acccor ding ly.

Re mo ve the side pa nel of the dry er.

Con nect the coo lant in ta ke line and coo lant re turn line to the re turn air coo ler.

Obes er ve the flow di rec ti on of the coo lant through the re turn air coo ler.

Check the con nec tions for le aks.

Mount the side pa nel.

516-2MS

As sem bly in struc tions 8-2

8.3. Elec tri cal con nec ti on

Ob ser ve the ru les of the lo cal elec tri ci ty board.

De hu mi di fied Air Dry er

»

L

F

Check that the supp ly vol ta ge and the po wer fre quen cy are in ac cor dan ce
with the data on the name pla te of the de vi ce.

The elec tri cal con nec ti on may only be car ried through or as sig ned by Ster ­ling ser vice staff or by qua li fied staff aut ho ri zed by Ster ling.

Ot her per sons are not per mit ted to car ry through the elec tri cal con nec ti on.

The main switch must be free ly ac ces si ble.

Ground the equip ment against elec tro sta tic char ging.

Ob ser ve that the con trol sys tem is still un der vol ta ge even when the
mains switch is swit ched off.

Re gu lar ly make sure that none of the elec tri cal or screw con nec tions are
loo se.

Im me di ate ly af ter con nec ti on, check the di rec ti on of ro ta ti on of the blo ­wers (see ro ta tio nal di rec ti on ar row on the blo wers).

The di rec ti on of ro ta ti on should be swit ched in the supp ly line only.

The ope ra ti on vol ta ge is 400 V/3AC/PEN/50 Hz.
Spe ci al ope ra ti on vol ta ges are pos si ble.

516-2MS

As sem bly in struc tions 8-3

STT 300

9. Tech ni cal Data

Ba sic Equip ment

· Cen tral ly mo ni to red Mitsubishi dry ing con trol sys tem with ope ra tor pa nel OP 7

· Cen tral tem pe ra tu re con trols for all hea ting ele ments to en su re cons tant tem pe ra tu re le vels

· Sa fe ty tem pe ra tu re li mi ter for all hea ters

· De sig ned for op ti mal re ge ne ra ti on time due to cons tant mo ni to ring of the moi stu re le vel in the

dry ing cells or de sic cant beds.

· Main ten an ce free air valves

· Au to ma tic alarm clock or ti mer

· Op ti cal alarm indication

· Functi on con trol with flow dia gram

Op tio nal Equip ment

· Dew point dis play

· Re turn air coo ler for high pro ces sing tem pe ra tu res

· Pre-air fil ter

· Spe ci al co lor

· Spe ci al vol ta ge

· Prin ter in ter fa ce

· Fuz zy Lo gic con trol for au to ma tic air dis tri bu ti on

· Con den sa ti on col lec ti on cham ber

· High-pres su re blo wers with fre quency con ver ter ope ra ti on

Per for man ce

· Ma xi mum air dry ing ca pa ci ty of 500 m

3

/h (10,620 cu.ft./hr)

· Ope ra tes with 400 V +/-10%, 3AC, 50 Hz vol ta ge

Spe ci al vol ta ge pos si ble 480/3/60

· 16 kW con nec ted load + max. 24 kW hop per heatings

· Noi se le vel: 83 dB (A)

516-2MS

· Weight ap prox. 500 kg (1102.39 lbs)

Tech ni cal Data 9-1

Di men si on sheet

STT 300

All di men sions are in mm (in). Sub ject to al te ra ti on.

516-2MS

Tech ni cal Data 9-2

10. Spa re parts list

This spa re parts list is in ten ded to be used only by trai ned per son nel.

STT 300

»

&

Ot her per sons are not per mit ted to mo di fy or re pair the equip ment.

ID-num bers for units with spe ci al vol ta ge, for ex. blo wers, only on re ­quest.

516-2MS

Spa re parts list 10-1

STT 300

2

1

3 4

12

Pos. ID-num ber De scrip tion

1 87788 High-pres su re blo wer HRD 1/2, 0,5 kW, 400 V/50 Hz

93741 V-belt

97762 Si li con hose
95819 Pull-but ton

2 95828 Tu bu lar hea ting ele ment 230 V, 3 kW (dry ing, op tio nal)

85276 Tem pe ra tu re li mi ter STB 160-250 °C (dry ing, op tio nal)

3 86363 Spind le mo tor 24 V

4 87094 Tu bu lar heat ing el e ment 230 V, 3 kW (re gen er a tion)

93795 Tu bu lar heat ing el e ment 230 V, 2450 W (re gen er a tion)
85275 Tem per a ture lim iter STB 360-500 °C (680-932°F) (re gen er a tion)

12 83986 Moi stu re sen sor

516-2MS

Spa re parts list 10-2

STT 300

PE

11

10

9

5 6

7

8

Pos. ID-num ber De scrip tion

5 86378 Fil ter car trid ge (if no re turn air coo ler is in use)

6 93687 Fine-mesh fil ter with fil ter mat (com ple te)

93686 Fil ter mat for fine-mesh fil ter

7 14208 Dry ing cell, com ple te

96196 Dry ing agent

8 05190 Val ve stem, com ple te

85682 Mi cro-switch

9 84156 Fan

84157 Fil ter unit com ple te
87491 Spa re fil ter mat

10 87787 High-pres su re blo wer HRD 1/5, 1,1 kW, 400 V/50 Hz

94211 V-belt

Op ti onal:

516-2MS

97762 Si li con hose
95819 Pull-but ton

S82524 High-pres su re blo wer HRD 1TFU, with fre quen cy con ver ter ope ra ti on
83023 Fre quen cy con ver ter
83022 Ope ra ting unit

11 84157 Fil ter unit com ple te

87491 Spa re fil ter mat

Spa re parts list 10-3

Ac ces so ries

85241 Di gi tal ti mer (ex tern, op tio nal)

86371 Mul ti plier Pt 100 (3 m) (9.84 ft)

89846 Mul ti plier Pt 100 (6 m) (19.79 ft)

93303 Mul ti plier Pt 100 (9 m) (29.53 ft)

86387 Mul ti plier Pt PT 100 (12 m) (39.47 ft)

83015 Mul ti plier Pt 100 (15 m) (49.21 ft)

Re turn air co ler (op tio nal)

29787 Re turn air co ler

87099 So le noid val ve 24 V

84503 Tem pe ra tu re con ver ter

88226 Fil ter car trid ge, tem pe ra tu re-pro of (if a re turn air coo ler is in use)

Flaps (op tio nal)

STT 300

16522 Mo tor flap NW150, com ple te

16517 Mo tor flap NW80, com ple te

86376 Mo tor ope ra tor 24 V, AD/DC, 50-60 Hz

18232 Air con trol flap

84492 Ther mo me ter

Hop per hea ters (op tio nal)

85343 Ra di ator (1,5 kW)

85338 Ra di ator (3 kW)

85363 Ra di ator (6 kW)

85651 Ra di ator (9 kW)

85652 Tem per a ture lim iter STB hopper heat ers

10.1. Swit ching Ca bi net and Ope ra ting Unit

&

516-2MS

Ob ser ve spa re parts list in the elec tri cal ma nu al.

Spa re parts list 10-4

11. E lec tri cal ma nu al

This electrical manual is intended to be used only by Ster ling ser vice
personnel and trained personnel authorized by Ster ling.

Other persons are not permitted to modify or repair the equipment.

¨ Con nec ti on dia gram no.: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

¨ Cur rent ly not avai la ble; will be de li ver ed at a la ter date!

De hu mi di fied Air Dry er

516-2MS

E lec tri cal ma nu al 11-1

12. Ac ces so ries

¨ En te ring va lu es on the OP 7 / 17

¨ Flap con trol with Fuz zy-Lo gic

¨ Elek tror High-pres su re blo wer with fre quen cy con ver ter ope ra ti on

¨ Elek tror High-pres su re blo wer

¨ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

¨ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

De hu mi di fied Air Dry er

516-2MS

Ac ces so ries 12-1

Ac ces so ries

En te ring va lu es on the OP 7 / 17

BG10/20

Ster ling Ma te rial Pro cess ing

1

OP7, OP17
09/96

3.3 Entering Values

In input fields, values can be entered on the OP and transferred to the PLC.
To do this, proceed as follows:

Step Procedure

1 Branch initially to the screen you

require and then to the corresponding screen entry.

2 Using the arrow keys, select the input field you require within the

screen entry.

3 Then enter your value. Depending on how the field has been con-

figured, values may be input as

inputs of numerical values (refer to section 3.3.1),

inputs of alphanumeric values (refer to section 3.3.2),

inputs of symbolic values (refer to section 3.3.3).

4

Confirm your input with

You can cancel any incorrect
input by pressing

The original value is then automatically reinserted in
the field. Insert the correct value and then enter the
corrected value by pressing

ESC

5 Position the cursor in the next input field, insert the next value

etc.

You can also use the arrow keys to move the cursor to the left or
right to the previous input field to insert a different value in it.

6

Close the screen by pressing

ESC

General procedure

General Operation

2

OP7, OP17

09/96

3.3.1 Entering Numerical Values

In fields that allow the operator to enter a numerical value, you enter the nu­merical value character by character using the keypad on the system key­board.

If there is a value in the field already, it is cleared completely from the field
when the first character is entered. Once input has been started, you cannot
exit from the field until the input has been entered or canceled.

In numerical fields, input initially is normally right-justified. Digits that have
already been entered are moved to the left (pocket-calculator format).

Exception:

Input fields for variables in KM format – for instance, when calling the PU
functions STATUS/FORCE VAR – are changed to left-justified . When input
begins, the old value does not disappear from the display completely but its
bit pattern is overwritten one character at a time. You move the cursor in this
type of field by pressing

or with activated Shift Lock mode.

You can configure limit values for numerical input fields. In this type of
field, a limit-value check takes place, i.e. the entered values are applied only
if they lie within the configured limits. If a value outside these limits is en­tered, a system message is displayed and, after it has been canceled, the old
value is restored in the field.

If a numerical field has been configured with a certain number of decimal
places and too many have been entered, they are ignored; if too few have
been entered, the field is padded with zeroes.

Input using numer­ical keypad

Changing the
value

Right-justified
input

Limit-value check

Decimal places

General Operation

3

OP7, OP17
09/96

3.3.2 Entering Alphanumeric Values

With the input of alphanumeric values, digits and letters are mixed.

For the numerical components of the input, proceed as described in section

3.3.1. If, however, you wish to enter a letter at the current cursor position,
you must enable the corresponding alphanumeric font. In this instance, you
move the cursor with activated Shift Lock mode with

and .

A to F characters can be entered directly with activated Shift Lock mode
using numeric keys 1 to 6. If you want to enter digits again after the letters,
Shift Lock mode must be de-activated. To enter the alphanumeric string
7FEB53, for example, proceed as follows:

Step Procedure

1 Press

7

2 Press

Shift-LED is on.

\

3 Press in succession

F

6

E

5

B

2

4 Press

Shift-LED goes out.

\

5 Press in succession

E

5

C

3

6 Confirm by pressing

\b

Mixed input of
digits and letters

Entering A to F
characters

General Operation

4

OP7, OP17

09/96

If the characters available on the keypad are not sufficient for the alphanu­meric input, you can select additional letters and special characters from the
extended character set. The extended character set is available for all KC
type fields.

To enter the string 18OKT61, for example, proceed as follows:

Step Procedure

1 Press in succession

A

1

8

2 Press

Shift-LED is on.

The extended character set is available.

\

3 Scroll with the arrow

keys through the extended
character set.

4 Select O and, using the

arrow key, move right
one position.

The character you selected is applied by moving the cursor.

5 Select K and, using the

arrow key, move right
one position.

6 Select T and, using the

arrow key, move right
one position.

7 Press

Shift-LED goes out.

\

8 Press in succession

F

6

A

1

9 Confirm by pressing

\b

Extended charac­ter set

General Operation

5

OP7, OP17
09/96

3.3.3 Entering Symbolic Values

When you enter a symbolic value, text is displayed instead of the value. If a
field has to be filled by entering symbolic values, take the value from a list of
options. To do so, proceed as follows:

Step Procedure

1 In the input field press

Shift LED is on.

The list of options with its configured symbolic inputs
is activated.

\

2 Select the value you require using the arrow keys.

3 Enter the value you

selected by pressing

Shift Lock mode is de-activated automatically.

\b

Text instead of a
value

General Operation

Acces so ries

Flap con trol
with Fuzzy-Lo gic

BG00/01

Ster ling Ma te rial Pro cess ing

Flap con trol with Fuz zy-Lo gic

01 201 2

Obser ve that the hop per is not swit ched off af ter the flap has clo sed.

F

Con trol unit “flap”

Switch po si tion:

0 = “Quick clo sing”

flap clo ses quick

1 = “Slow clo sing”

flap clo ses con tro lled

2 = “Au to ma tic con trol”

flap ope ra tes pul sed
(ope ning/clo sing)

Tur ning hop per off: see chap ter “start-up, tur ning the de vi ces on/off”.

BG00/01

2