Operating Instructions
Dehumidified air dryer
STT 110
STT 160
Sterling Material Processing
STT 110 / STT 160
Sterling Material Processing
5200 West Clinton Ave.
Milwaukee, WI 53223
Telephone: (414) 354-0970
Fax: (414) 354-6421
Technical service:
Service department
Telephone: (800) 423-3183
Edition: 04/02
These operating instructions are for*:
(* Please fill in personally)
Serial number:
Year of manufacture:
Date of delivery:
Number of delivery:
Date of commissioning:
Location:
Group of machines:
2
STT 110 / STT 160
Sterling Material Processing retains all rights to change the information in these
operating instructions at any time without notice.
We assume no liability for any errors or direct or indirect damage resulting in con-
text with these operating instructions.
Copying, translation or publication in any form except for personal use of purcha-
ser requires approval from Sterling Material Processing.
All rights reserved.
3
STT 110 / STT 160
Table of contents
1. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.1. Warnings and symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.2. Explanations and information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.3. Legal basis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.4. Fields of applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.5. Notes on Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2. Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1. For your safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2. For the safety of the devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
3. Start up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1. Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.1.1. Switching on the Dryer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2. Continuous Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3.2.1. Switching the Dryer on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3.2.2. Setting the Drying Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.3. Switching the Dryer off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
4. Error and error correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
5. Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.1. Maintenance schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.2. Cleaning or Replacing the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.2.1. Cleaning or Replacing the Return Air Filter . . . . . . . . . . . . . . . . . . . . . 5-5
5.3. Disposing of Drying Agents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.3.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.3.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.3.3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.3.4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.3.5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.3.6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.3.7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.3.8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.3.9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.4. Cleaning the Drying Hopper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
6. Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
4
STT 110 / STT 160
6.1. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6.2. Drying Hopper (Optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
6.2.1. Hopper Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
6.3. Connection to a Pneumatic Conveying System (Optional) . . . . . . . . . . . . . . . . 6-7
6.4. Return Air Cooler (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
7. Transport, Assembly and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.1. Tansport and Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
7.2. Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
7.3. Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
8. Assembly instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.1. Installation of the exhauster fan for regeneration of exhaust air. . . . . . . . . . . . 8-2
8.2. Grounding the equipment against electrostatic charging . . . . . . . . . . . . . . . . . 8-2
8.3. Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
8.4. Connection of Return Air Cooler (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
9. Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
9.1. STT 110. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
9.2. STT 160. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
9.3. Dimension Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
10. Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
11. Electrical manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
o Connection diagram no.: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
o Currently not available; will be delivered at a later date !
12. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
o Basic setting thermo regulator
o Digital timer
o _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
o _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
o _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
5
STT 110 / STT 160
1. General Information
These operating instructions are addressed to all users of the device.
These operating instructions must be used by every person charged with
work on the unit.
»
General Information 1-1
STT 110 / STT 160
1.1. Warnings and symbols
The following warnings and symbols are used in these operating instructions:
This symbol indicates danger to life! Fatal or serious injury is possible if the
corresponding instructions, regulations or warnings are not observed.
»
L
This symbol indicates that serious injury is possible if the corresponding
instructions, regulations or warnings are not observed.
This symbol indicates that extensive damage to equipment is possible if
the corresponding instructions, regulations or warnings are not obser-
ved.
F
This symbol indicates information important for becoming familiar with
the equipment, i.e. technical correlations.
&
This symbol indicates that a technical term is explained at this point.
$
General Information 1-2
STT 110 / STT 160
When disposing of drying agents / batteries / oil, observe all official rules.
Caution: High noise pollution !
For all work on the equipment, hearing protection should be worn.
Avoids impairment of hearing!
Caution: Danger of crushing !
Disconnect the equipment from mains supply before starting
mainenance procedures. All compressed air pipes on the equipment
should be depressurised before starting maintenance work.
Caution: Danger of hot surface !
Before starting any work wait until all parts have been cooled down suffi-
ciently. Avoid touching any of these parts!
Caution: Danger of skidding !
Remove any granules remaining on the ground.
Caution: Danger to life through electrical shock !
Observe that the control system is still under voltage even when the main
switch is switched off.
General Information 1-3
CTT 110 / CTT 160
1.2. Explanations and information
Various terms and designations are used in these operating instructions to ensure clarity. There-
fore please note that the terms used in the text stand for the corresponding explanations listed be-
low.
Equipment
”Equipment” can mean an individual unit, a machine or an installation.
•
Operating personnel
The ”operating personnel” are persons operating the equipment on their own responsibility or ac-
cording to instructions.
•
Operator
The ”operator” oftheequipment(production manager, foreman, etc.)is theperson responsible for
allproductionsequences. Theoperatorinstructstheoperatingpersonnelofwhatistobedone.
•
Operating instructions
The ”operating instructions” describe the interaction of the equipment, production sequences or
methods. The operating instructions must be compiled by the operator of the equipment.
•
Equipment foreman
When several operating personnel work on one machine, the ”equipment foreman” coordinates
the sequences. The equipment foreman must be appointed by the operator.
•
Trained personnel
”Trained personnel” are persons who, due to their training, are authorized to carry out the required
work.
•
1.3. Legal basis
See “Manufacturer’s Certificate” resp. “Certificate of Conformity”.
1.4. Fields of applications
For the drying of thermoplastic granules and regrind before processing in order to remove all re-
maining moisture from the granules both inside and out, independent of climate or ambient air
conditions.
1.5. Notes on Usage
Experienced operators can begin directly with the chapter on “Start-up” if the unit has been pro-
perly installed.
•
If the unit has not been installed yet, observe the instructions in the chapter on “Assembly Instruc-
tions” and “Transport, Assembly and Storage”.
•
General Information 1-4
STT 110 / STT 160
2. Safety instructions
These safety instructions apply to all persons within the range of action of the
equipment.
»
Please inform all persons within the range of action of the equipment of the
direct and indirect hazards connected with the equipment.
These operating instructions are to be used by all persons assigned activi-
ties connected with the equipment.
Knowledge of the English language is prerequisite.
Ensure in each case that the operating personnel are familiar with the opera-
ting instructions and the function of the equipment.
Safety instructions 2-1
STT 110 / STT 160
2.1. For your safety
General
The operating personnel of this equipment must be at least 16 years old.
Please read these operating instructions carefully before taking into operation for the first time.
Contact us should questions arise. This avoids injury and damage to equipment!
These operating instructions must be kept available at all times at the place of operation of the
equipment. Improper operation results in danger of accidents!
Please note that, for reasons of clarity, not all conceivable cases regarding operation or mainten-
ance of the equipment can be covered in these operating instructions.
Please observe all safety instructions and warnings on the equipment. This avoids injury and da-
mage to equipment!
All work on the equipment is to be carried out by persons whose qualifications are specified in the
pertaining chapters of the operating instructions. Improper operation results in danger of acci-
dents!
The proper working clothes are to be worn during any work on the equipment. This avoids injury!
The local regulations and requirements pertaining to this equipment must be observed.
Disconnect electrical components from the mains supply before work is carried out on these com-
ponents Caution: Danger to life through electrical shock!
Compile detailed operating instructions based on these Operating instructions for the sequence
of procedures to be carried out on this equipment. Improper operation results in danger of acci-
dents!
Observe that the control system is still under voltage even when the main switch is switched off.
Caution: Danger to life through electrical shock!
Safety instructions 2-2
STT 110 / STT 160
Assembly
Compare the connected loads with those of the mains supply. Danger of injury through electrical
shock!
When using lifting gear, please observe the pertaining regulations. Caution: Danger of accidents!
Do not modify, add other equipment or change the design of the equipment without the approval
of the manufacturer. Caution: Danger of accidents!
Attachments not supplied by Sterling must be manufactured in accordance with safety regulation
EN 294. Danger of accidents!
The equipment may only be operated when all the associated components are properly connec-
ted up and in accordance with the relevant regulations. This avoids injury and damage to equip-
ment!
Operate the device only if all its components are grounded. Danger: accident through electrical
shock!
Please note for installation that the equipment is top-heavy. Danger exists that it may topple over!
Take care that the device is not standing on the mains cable. This will prevent danger to people
and material!
Operation
Appoint an equipment foreman to be responsible for the equipment.
Ensure that the operating personnel are provided detailed instruction in the operation of the
equipment. Improper operation results in danger of accidents!
When the main switch is switched off for reasons pertaining to safety, it must be secured against
unauthorized activation. Caution: Danger of accidents!
Repair work may be carried out by trained personnel only. Caution: Danger of accidents!
Never operate the equipment when partially dismantled! Danger! Limbs may be caught in machi-
nery! Electric shock!
In case of malfunction, shut down the equipment immediately. Have malfunctions corrected im-
mediately. Danger of accidents!
The machine is intended only for the drying of granulated plastics. Any other or additional use is
contrary to specifications.
This equipment is not suitable for food processing.
The safety instructions of the connected machines must be followed.
Please note that sound levels exceeding 85 db(A) may in the long term damage your health. Use
the appropriate ear muffs. This avoids impairment of hearing!
Please note that the drying cells, drying hoppers and air pipings grow hot during use. Avoid tou-
ching any of these parts! Danger: Injury through burns!
Never operate the dryer without side panels. Danger: Limbs may be caught in machinery! Injury
through burns!
Safety instructions 2-3
STT 110 / STT 160
Operate the dryer only if there is at least one drying hopper operating. This will prevent damage of
material!
When drying plastics which emit gases dangerous for human health, take care that the regenera-
tion exhaust air is disposed of without polluting the environment. This will prevent danger to peo-
ple and material!
Maintenance
Before starting maintenance work, appoint a supervisor.
Inform the responsible personnel before maintenance work on the system is started. Caution:
Danger of accidents!
Disconnect the equipment from mains supply before starting maintenance procedures to ensure
that it cannot be switched on unintentionally. Caution: Danger of accidents!
All pipes, hoses and screwed connections should be checked regularly for leaks and damage.
Any faults which arise should be corrected immediately. Danger of accidents!
Depressurize all compressed air piping before starting maintenance work. Danger of accidents!
The air filters should only be cleaned/replaced when the the main switch is off and the blower has
stopped. This avoids injury and damage to equipment!
Any maintenance work on the equipment should only be started when the the main switch is off
and the blower has stopped. This avoids injury and damage to equipment!
Check the v-belts of the blower only when the main switch is switched off and the blowers have
stopped. Caution: Danger of accidents!
Open drying hoppers only if they are completely empty. Danger of accidents!
Never open drying hoppers while the device is in operation. Danger: Injury through burns!
Open drying hoppers only if they have been cooled down sufficiently. Danger: Injury through
burns!
Before starting maintenance work wait until the drying cells, drying hoppers and air pipings have
been cooled down sufficiently. Avoid touching any of these parts! Danger: Injury through burns!
Remove any granules remaining on the ground. Danger of accidents!
Arrest the wheels after installation if the dryer is mounted on a movable frame. This will prevent
danger to people and material!
Safety instructions 2-4
STT 110 / STT 160
2.2. For the safety of the devices
Never change settings without carefully assessing the consequences.
Use only original Sterling spare parts.
Observe the maintenance instructions.
Keep a record of all maintenance works and repairs.
Please note that electronic components can be damaged by static discharge.
Before initial operation and in regular intervals, make sure that no electrical connections are loo-
se.
Never readjust sensors without exactly knowing their functions.
Please ensure that the permitted storage temperature lies between 0 and +55 °C
(32 to +131 °F).
Please ensure that the permitted operation temperature lies between 0 and +45 °C
(32 to +113 °F).
Check the direction of rotation of the blowers after the electrical connections have been made
(see rotational direction arrow).
Clean the drying hoppers before the first filling.
Note the instructions of the material manufacturer for the maximum drying temperature.
Note the drying instructions of the material manufacturer.
Take care that the drying hoppers are always completely filled and that the retention period is re-
spected if continual removal is taking place.
Note that too large amounts taken from the drying hopper lead to insufficient drying of the materi-
al.
Close the air stop valves of drying hoppers which are empty or have not been used.
Note down all data which you have entered into the control system.
The password is to be entrusted to authorised personnel only.
Please note that the temperature of the dryer heating system must always be set lower than that of
the supplementary heaters.
When you dispose of drying agents, observe all official rules.
Note that drying cells are replaced or refilled by Sterling only if they are empty.
The material level may not fall below 40 % in the drying hopper, when material is continuously re-
moved from the drying hopper, but no material is continuously fed into the drying hopper (batch
drying). Close the throttle valves.
Read the operating manuals of the connected devices.
Safety instructions 2-5
STT 110 / STT 160
3. Start up
This chapter is addressed to the operators of the machine.
This chapter assumes general skills with drying equipment.
»
This chapter assumes that the functional description has been read and un-
derstood.
It must be ensured that the operators have the required experience.
Make sure that the main switch is at “0" position.
Check the drying hopper for cleanliness.
F
Check to see whether the adhesive film on the drying hopper has be re-
moved.
If there is a return air cooler, switch on its coolant circuit.
If there is a timer clock (optional), adjust it. Read the operating manual of
the timer clock.
Check whether the release switch “Timer” and the release switches
“Hopper” (ST1 - ST6) are at ”0" position.
The signal lamp “trouble” may flash shortly while the valve block is chan-
ged.
&
Start up 3-1
STT 110 / STT 160
3.1. Initial Operation
Check whether the inlet of the drying hopper is closed by a blind lid, or whether a conveyor unit
(optional) is installed.
If not, manufacture a suitable blind lid and install it on the inlet of the drying hopper or install the
conveyor unit (optional).
Attachments which are not supplied by Sterling must be manufactured
according to the safety regulation European Standard 294.
F
Check whether the coolant circuit of the return air cooler is turned on (if a return air cooler is instal-
led).
3.1.1. Switching on the Dryer
Switch on the main switch of the dryer.
The signal lamp “power” goes on.
&
For operation with timer clock (optional):
Turn the release switch “Timer” at position:
For operation without timer clock:
Turn the release switch “Timer” at position:
The blower is running.
&
If the dryer has not been in use for several months it must be operated for
about 2 hours without material.
F
Start up 3-2
STT 110 / STT 160
Turn the release switches “Hopper” (ST1 - ST6) at “I” position.
Turn the thermo regulator to +80 °C (176°F) for the drying temperature.
Press the “PGM” key.
Set by means of the arrow keys the drying temperature to “80".
After 2 seconds the display flashes and the value is stored.
Press the “EXIT” key (the setpoint value and the actual value
of the drying temperature are displayed).
EXIT
After 2 hours turn the release switches “Hopper” (ST1 - ST6) at “0” position.
Turn the release switch “Timer” at position:
Wait until the blower has stopped.
The run on time of the blower is 10 minutes.
L
If there is a return air cooler installed, switch off its coolant circuit.
Switch off the main switch of the dryer.
The signal lamp “power” goes off.
&
Start up 3-3
STT 110 / STT 160
3.2. Continuous Operation
Fill at least half of the drying hopper with material.
F
3.2.1. Switching the Dryer on
Switch on the main switch of the dryer.
The signal lamp “power” goes on.
&
For operation with timer clock (optional):
Turn the release switch “Timer” at position:
For operation without timer clock:
Turn the release switch “Timer” at position:
The blower is running.
&
Start up 3-4
STT 110 / STT 160
3.2.2. Setting the Drying Temperature
Turn the release switches “Hopper” (ST1, ST2) at “I” position.
For each drying hopper, set the required drying temperature (= desired value) by means of the re-
spective thermo regulator.
Check whether the set drying temperature is appropriate for the materials which have been filled
in.
Observe the instructions of the material manufacturer.
After the first filling, process the material only after the retention period is over.
Observe the instructions of the material manufacturer.
Press the “PGM” key.
By means of the arrow keys select the desired value for
the drying temperature.
After 2 seconds the display flashes and the value is stored.
EXIT
Press the “EXIT” key (the setpoint value and the actual value
of the drying temperature are displayed).
After a change of materials, immediately check and correct the set drying
temperature.
F
Start up 3-5
STT 110 / STT 160
Optimizing the thermo regulator
Press the “EXIT” key for at least 2 seconds.
EXIT
60
K1 K2
“tunE” flashes. The optimization can take several minutes.
K3
tunE
PGM
EXIT
60
tunE
If “tunE” stops flashing, the optimization is finished.
PGM
EXIT
Press the “EXIT” key.
EXIT
Start up 3-6
STT 110 / STT 160
3.3. Switching the Dryer off
Set the release switch “Timer” at position:
Wait until the blower has stopped.
The run on time of the blower is 10 minutes.
L
If there is a return air cooler installed, switch off its coolant circuit.
Switch off the main switch of the dryer.
The signal lamp “power” goes off.
&
Start up 3-7
STT 110 / STT 160
4. Error and error correction
This chapter is directed at the operators of the equipment.
This chapter assumes general skills in dealing with drying systems.
»
This chapter assumes that the “start-up” description has been read and un-
derstood.
It should be ensured in each and every case that the operators have the rele-
vant skills.
Faults must be eliminated before the control system can again start oper-
ating.
F
An alarm is indicated by steady light of the signal lamp “trouble”.
When the fault has been eliminated, the signal lamp “trouble” goes off.
&
Error and error correction 4-1
STT 110 / STT 160
The following errors can lead to an alarm:
Blower
The pressure of the blower is too low.
Check the blower.
Vacuum sensor defective.
Regeneration heater 1
The safety temperature limiter of the regeneration heater 1 has been activated.
Check the safety temperature limiter.
Sterling Service.
Regeneration heater 2
The safety temperature limiter of the regeneration heater 2 has been activated.
Check the safety temperature limiter.
Sterling Service.
Hopper heater
The safety temperature limiter of the hopper heater has been activated.
Check the safety temperature limiter.
Sterling Service.
Error and error correction 4-2
STT 110 / STT 160
5. Maintenance
This chapter is intended for persons with skills in electrical and mechanical
areas due to their training, experience and received instructions.
»
Personnel using the instructions in this chapter must be instructed of the reg-
ulations for the prevention of accidents, the operating conditions and safety
regulations and their implementation.
Ensure in each case that the personnel are informed.
For maintenance work taking place at theights of over approx. 1829 mm (6
ft.), use only ladders or similar equipment and working platforms intended for
this purpose. At greater heights, the proper equipment for protection against
falling must be worn.
Use only suitable lifting gear which is in proper working order and load sus-
pension devices with sufficient carrying capacity. Do not stand or work under
suspended loads!
Ensure that the electric motors/switch cabinets are sufficiently protected
against moisture.
Use suitable workshop equipment.
Before starting maintenance work, appoint a supervisor.
Inform the responsible personnel before maintenance work on the system is
started.
Never operate the equipment when partially dismantled.
Any maintenance and repair work NOT described here may only be carried
out by Sterling service personnel or by specialised staff authorised by
Colortronic.
Disconnect the equipment from mains supply before starting
mainenance procedures to ensure that it cannot be switched on uninten-
tionally.
L
All compressed air pipes on the equipment should be depressurised be-
fore starting maintenance work.
Maintenance 5-1
STT 110 / STT 160
Please observe the maintenance schedule.
Before starting maintenance work, clean the equipment of oil, fuel or lu-
bricant.
F
Ensure that materials and incidentals required for operation as well as
spare parts are disposed of properly and in an environmentally sound
manner.
Use only original Sterling spare parts.
Keep record of all maintenance and repair procedures.
Maintenance 5-2
STT 110 / STT 160
5.1. Maintenance schedule
Daily:
Check warning signs on equipment for good
legibility and completeness
Clean return air filters and casing (depending
on dust build-up)
Weekly:
Check main switch for proper function
Check the signal lamps for proper functioning
Every six months:
Change return air filters (depending on dust build-up)
Clean air filter of the suction box
All electrical and mechanical connections
should be checked to see if they fit securely
Annually:
Dewpoint should be checked (only by
Sterling service personnel)
Whenever the
material is changed:
The drying hopper and suction box must be cleaned
The service intervals refer to a 3-shift operation.
&
The given maintenance intervals are average values.
Check whether in your individual case the maintenance intervals must be
shortened.
F
Maintenance 5-3
STT 110 / STT 160
5.2. Cleaning or Replacing the Air Filter
Set the release switch “Timer” at position:
Wait until the blower has stopped.
The run on time of the blower is 10 minutes.
L
If there is a return air cooler installed, switch off its coolant circuit.
Switch off the main switch of the dryer (the signal lamp “power” goes off).
Interrupt the mains supply so that the device cannot be switched on unin-
tentionally.
L
Clogged filters substantially reduce the amount of circulating air and lead
to a production lag of your dryer. Clogged filters may also damage the
heating elements.
&
Maintenance 5-4
STT 110 / STT 160
5.2.1. Cleaning or Replacing the Return Air Filter
STT 110 / STT 160
Detach the nut on the housing of the return
air filter and remove the housing cover.
Air filter
Remove the nut of the filter cartridge.
Remove the filter cartridge.
Clean the inside of the return air filter hous-
ing. Use non-fibrous cleaning cloths or an
industrial type vacuum cleaner.
Blow compressed air from the inside out
through the clogged filter cartridge or re-
place the filter cartridge.
Re-install the cleaned/new filter cartridge.
Mount the nut.
Install the lid of the return air filter
housing.
Fix the nut.
STT 110 / STT 160
Never operate the dryer without return air filter.
F
Purchase order numbers return air filter
when operating without return air cooler: ID 88366
&
when operating with return air cooler:
ID 88628
Maintenance 5-5
STT 110 / STT 160
5.3. Disposing of Drying Agents
Please note that drying cells are replaced or refilled by Sterling only if they are empty.
When disposing of drying agents, observe all official rules.
Since used drying agents may contain impurities from the dried materi-
als, treat them as special waste.
It is not possible for Sterling to take back the used drying agent or drying
cells with used drying agents.
&
5.3.1.
5.3.2.
5.3.3.
5.3.4.
5.3.5.
5.3.6.
5.3.7.
5.3.8.
5.3.9.
Maintenance 5-6
STT 110 / STT 160
5.4. Cleaning the Drying Hopper
Set the release switch “Timer” at position:
Wait until the blower has stopped.
The run on time of the blower is 10 minutes.
L
If there is a return air cooler installed, switch off its coolant circuit.
Switch off the main switch of the dryer (the signal lamp “power” goes off).
Interrupt the mains supply so that the device cannot be switched on unin-
tentionally.
L
Clean the drying hopper each time you are changing the materials.
Make sure that the drying hopper has cooled down sufficiently.
Make sure that the drying hopper is completely empty.
Remove any granules remaining on the ground.
F
Maintenance 5-7
STT 110 / STT 160
ST 25
Open the toggle-type fasteners (A) at the hopper lid
and fold the hopper lid upwards (if in use: remove be-
fore the single conveyor).
A
Clean the drying hopper.
Close the hopper lid and close the toggle-type fasten-
ers (A) (if in use: re-mount the single conveyor).
TT 25
Remove any granules remaining in the cleaning opening.
F
Maintenance 5-8
STT 110 / STT 160
ST 60 - ST 1600
Open the cleaning opening of the drying hopper: Lift and turn the handle (A) to open the lock, if in
use: remove before the single conveyor (ST 400 - ST 1600: 2 handles).
Clean the drying hopper.
Close the cleaning opening of the drying hopper: Turn the handle (A) until the cleaning opening is
locked and then close the handle (if in use: re-mount the single conveyor).
Remove any granules remaining in the cleaning opening.
ST 1200 and ST 1600: Clean the bead.
F
Maintenance 5-9
STT 110 / STT 160
6. Functional description
This functional description is addressed to the operators of the equipment.
This functional description assumes general familiarity with drying equip-
ment.
»
It should be verified that the operators do indeed have the appropriate skills.
Functional description 6-1
STT 110 / STT 160
6.1. General Information
The dehumidified air dryers were developed for drying plastic granules. Due to their compact con-
struction, they can be employed next to the processing machine (drying hopper on the processing
machine) or with one or more drying hoppers as a movable facility (compact facility).
The dryers work according to the dehumidified air principle, i.e., the air is not only heated but also
dehumidified before it flows through the drying hopper.
In this manner, plastic granules can be dried down to a very small residual moisture content.
The drying temperature can be adjusted, if necessary, up to a maximum of +180 °C (356°F) (up-
per limit). Due to the heat that is released during water absorption in the drying cells, the lower
limit of the dehumidified air temperature is approx. +60 °C (140°F).
The drying takes place continuously, i.e., there are no rest periods due to regeneration of the dry-
ing agent.
The dryer is rated for continuous operation.
The dryer may only be put into operation if the drying hopper is filled.
F
Functional description 6-2
STT 110 / STT 160
All function sequences are fully automatic.
The dryer is equipped with two drying cells. One drying cell is part of the drying cycle; the other
drying cell is regenerated simultaneously.
Part of the dehumidified air is used for regenerating the moist drying cell. At the beginning of rege-
neration, it is heated by the regeneration heater. After the end of the heating period, the drying cell
is cooled off by means of dehumidified air. After the switch-over time is reached, the regenerated
drying cell is included in the drying cycle, and the cycle starts again.
1
2
3
4
5
6
7
8
9
Drying cell
Regenerating heater
Drying hopper
Diaphragm
Return air filter
Blower
Valve
Drying heater
Suction box
Functional diagram
Functional description 6-3
STT 110 / STT 160
A digital display of the current dew point temperature can be supplied as additional equipment.
As an option, a timer clock can be supplied which switches the dryer on or off at preselected times.
Read the operating manual of the timer clock.
F
1
2
3
4
8
7
6
5
1 = release switch “hopper” ST1-ST6
2 = dew point display (optional)
3 = signal lamp “power”
4 = signal lamp “trouble”
5 = main switch
6 = release switch “Timer”
7 = timer clock (optional)
8 = thermo regulator “drying hopper” ST1-ST6
Operating unit
Functional description 6-4
STT 110 / STT 160
6.2. Drying Hopper (Optional)
The material is dried in the drying hopper.
The dehumidified air is conducted through
the material in the drying hopper and takes
up moisture. Drying hoppers must have the
appropriate dimensions for their specific use
so that the desired final moisture content is
reached. When refilling a drying hopper, the
material must first be dried completely before
material can be taken out for the first time.
If material is taken out continuously, there
must also be a continual addition of material
into the drying hopper (continuous drying
process). New (moist) material is conducted
into the upper opening of the drying hopper
and slowly reaches the material outlet at the
lower end. On its way from the upper to the
lower end, the material is dried down to the fi-
nal moisture content.
In order to guarantee a continuous drying
process, we recommend that you always
keep the drying hopper filled completely.
Drying Hopper
Functional description 6-5
STT 110 / STT 160
6.2.1. Hopper Heater
Each drying hopper has its own hopper heater. The temperature of the dehumidified air is adjus-
ted by means of the thermo regulator. The setting range is from +60 - +180 °C. The current tempe-
rature can be read off the digital display (= actual value).
The thermo regulator is factory-programmed. Nevertheless, you have to
set specific values which are dependent on the processed material.
F
Process display
drying temperature
60
Setpoint display
K1 K2
drying temperature
K3
180
“PGM” key,
Selecting operating level
or parameter selection
“EXIT” key,
Aborting the input
PGM
EXIT
reducing setpoint value
increasing setpoint value
Thermo regulator
Functional description 6-6
STT 110 / STT 160
6.3. Connection to a Pneumatic Conveying System (Optional)
Your drying facility works best in combination
with a pneumatic conveying system. In this
way, your drying hopper will always be supp-
lied with sufficient material.
The facility will only take as much material as
is required by the processing machines. The-
refore, the drying result will always be the
same.
Sterling drying hoppers are equipped with a
suitable flange for adding a Sterling pneuma-
tic conveyor.
A
Suction boxes with one or three suction tu-
bes can be supplied as well (optional). These
suction boxes are developped specifically for
this type of hopper.
The loading of the conveying line with materi-
al is adjusted by closing or by opening of the
control cover (A).
Suction box
6.4. Return Air Cooler (Optional)
A return air cooler must be employed if the return air temperature is
higher than +65 °C (149°F).
F
A return air cooler improves the efficiency of the drying cells.
The lower the return air temperature, the better the efficiency of the dry-
ing cells.
&
The return air cooler can be connected to a coolant circuit or to the water mains network.
Functional description 6-7
STT 110 / STT 160
7. Transport, Assembly and Storage
This chapter is intended for all operating personnel of the equipment.
Personnel using these instructions must be instructed in the regulations for
the prevention of accidents, the operating conditions and safety regulations
and their implementation.
»
Ensure in each case that the operating personnel are sufficiently informed.
Please inform all persons within the range of action of the equipment of the
direct and indirect hazards connected with the equipment.
Please observe all safety regulations for the operation of lifting equipment.
Transport, Assembly and Storage 7-1
STT 110 / STT 160
7.1. Tansport and Packing
Please ensure adequate carrying capacity of the lifting equipment.
Note that the dryer system is top-heavy. Risc of toppling!
»
The machine must not be tilted or laid on its side.
F
The equipment pass a rigorous operating test in the factory and are packed carefully to avoid
transport damage.
Please check packing on delivery for transport damage.
The inlet and discharge flanges are sealed with plugs, so that no dirt can enter during transport.
Plugs must be removed before assembly.
Packing materials should be disposed of according to environmental laws or reused.
The dryer or the compact unit is delivered on a pallet.
The dryer should only be moved by means of the appropriate lifting equipment (e. g. a fork lift
truck or a workshop crane).
Fasten the transport cables to the eyelets of the control cabinets.
Transport must be shock-proofed and free from vibrations.
Transport, Assembly and Storage 7-2
STT 110 / STT 160
7.2. Assembly
Please ensure adequate carrying capacity of the lifting equipment.
Check the carrying capacity of the point of installation, particularly if installed
on a platform.
»
The place selected for installation should be as free of vibrations as possible.
The main switch must be freely accessible.
Ground the equipment against electrostatic charging.
The machine must not be tilted or laid on its side.
F
Because of its compact construction the dryer can be installed directly beside the processing ma-
chine (drying hopper on the processing machine) or with one or more drying hoppers as a mov-
able facility (compact facility).
Special foundations are not necessary for installation.
The dryer must be installed on a level surface and must not be exposed to excessive humidity.
The maximum permissible ambient temperature is 45 °C (113°F).
To facilitate servicing, the dryer should be installed in such a way that that it is accessible from
3 sides. Make sure that the air filters can be changed without problems.
To conserve energy, keep the distance between dryer, hopper and processing machine as small
as possible.
The wheels of the compact unit should be locked to ensure stable installation.
The foil should be removed from the drying hopper.
7.3. Storage
The control system may only be stored at temperatures from 0 to +55°C (32 to +131 °F).
Between delivery and machine commissioning the equipment should be stored in a dry, dust-free
and vibration-free room.
Transport, Assembly and Storage 7-3
STT 110 / STT 160
8. Assembly instructions
These installation instructions are intended for persons with skills in electri-
cal and mechanical areas due to their training, experience and received in-
structions.
»
Personnel using these installation instructions must be instructed in the reg-
ulations for the prevention of accidents, the operating conditions and safety
regulations and their implementation.
Ensure in each case that the personnel are informed.
The installation instructions provided in the corresponding operating instruc-
tions apply for all connected equipment.
Observe safety regulations with regard to lifting gear handling.
All installation work must be carried out with the equipment disconnected
from electrical power and compressed air supply.
For installation work taking place at heights of over approx. 6 feet (1829
mm), use only ladders or similar equipment and working platforms in-
tended for this purpose. At greater heights, the proper equipment for pro-
tection against falling must be worn.
L
Use only suitable lifting gear which is in proper working order and load
suspension devices with sufficient carrying capacity. Do not stand or
work under suspended loads!
Use suitable workshop equipment.
Install the equipment such that all parts are easily accessible; this facili-
tates maintenance and repair work
F
Assembly instructions 8-1
STT 110 / STT 160
8.1. Installation of the exhauster fan for regeneration of exhaust air
When plastics are being dried that release harmful gases during the drying process, care must be
taken that the regeneration exhaust air is disposed of in an environmentally sound way. At the
same time the throughput of the regeneration blower must not be altered. It should be noted when
assembling a disposal system (e.g. an exhauster system) that the regeneration exhaust air is very
humid. Thus condensation may form, which must not under any circumstances return to the dryer.
8.2. Grounding the equipment against electrostatic charging
Considerable electrostatic charging may occur in the equipment during processing of the various
materials. For this reason, all components must be sufficiently grounded, see grounding bolt
dryer (A) and drying hopper (B).
Ensure that the regulations of the local electric supply company are observed.
A
B
Grounding the equipment
Assembly instructions 8-2
STT 110 / STT 160
8.3. Electrical Connection
The electrical connection of the dryer and of the hopper heaters may only be
carried through or assigned by Sterling service staff or by qualified staff au-
thorized by Sterling.
»
Other persons are not permitted to carry through the electrical connection.
Observe the rules of the local electricity board.
The main switch must be freely accessible.
Ground the equipment against electrostatic charging.
Regularly make sure that none of the electrical or screw connections are
loose.
F
Make sure that the main switch is at “0" position before the electrical con-
nection is carried out.
The operating voltage is 480/3/60
Special voltages can be supplied on request.
The connected loads* are
STT 110 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approx. 3.2 kW;
STT 160. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approx. 3.6 kW.
*If hopper heaters are installed, the value of each hopper heater must be added to these con-
nected loads (max. 9.0 kW).
The fuse protection must have 32 A.
Assembly instructions 8-3
STT 110 / STT 160
8.4. Connection of Return Air Cooler (Optional)
A return air cooler must be employed if the return air temperature is
higher than +65 °C (149°F).
F
You can connect the return air cooler to a coolant circuit or to the water mains network.
The water flow rate in the water mains network* is for:
STT 110. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approx. 0.35 m /h (12.46 cf/h)
3
3
STT 160 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approx. 0.48 m /h (17.05 cf/h)
(*water temperature: +6 °C) (42.8°F)
Rate your coolant circuit accordingly.
Connect the coolant in- and outlets to the return air cooler.
Observe the flowing direction of the coolant.
Check the tightness of the connections.
Connection of the return air cooler
STT 110 / STT 160
Assembly instructions 8-4
STT 110 / STT 160
9. Technical Data
9.1. STT 110
3
amount of dehumidified air:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 110 m /h (3,8846.1 cf/h)
operating voltage:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 V/3 AC/50 Hz
special voltages can be supplied on request
connected load: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 kW
calorific output (drying)*: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 9.0 kW
*depending on the equipment with hopper heaters
calorific output (regenerating):. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 kW
driving power (drying, regenerating): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.75 kW
drying temperature: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. +180 °C(356°F)
width: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 mm (35.5 in.)
depth:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666 mm (26.2 in.)
height: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1320 mm (52.0 in.)
weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approx. 180 kg (396.83 lbs.)
noise: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approx. 66 dB (A)
options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . timer clock
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . dew point display
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . return air cooler
Return Air Cooler
3
water flow rate in the water mains network*:. . . . . . . . . . . . . . . approx. 0.35 m /h (12.46cf/h)
(*water temperature: +6 °C) (42.8°F)
Ø pipe connection:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/2” (0.5 in.)
Technical Data 9-1
STT 110 / STT 160
9.2. STT 160
3
amount of dehumidified air:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 160 m /h (5,650.35 cf/h)
operating voltage:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 V/3 AC/50 Hz
special voltages can be supplied on request
connected load: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6 kW
calorific value (drying)*:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 9.0 kW
*depending on the equipment with hopper heaters
calorific value (regenerating):. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 2.4 kW
driving power (drying, regenerating): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 kW
drying temperature: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. +180 °C (356°F)
width: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 mm (35.46 in.)
depth:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666 mm (26.2 in.)
height: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1320 mm (52.0 in.)
weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approx. 195 kg (432.10 lbs.)s
noise: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approx. 72 dB (A)
options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . timer clock
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . dew point display
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . return air cooler
Return Air Cooler
*
water flow rate in the water mains network : . . . . . . . . . . . . . . . approx. 0.48 m /h(17.05 cf/h)
3
(*water temperature: +6 °C) (42.8°F)
Ø pipe connection:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/2” (0.5 in.)
Technical Data 9-2
STT 110 / STT 160
9.3. Dimension Sheet
Dimensions and data without obligation. Dimensions in mm. (in.) Specifications may be subject to alterations.
Technical Data 9-3
STT 110 / STT 160
10. Spare parts list
This spare parts list is intended to be used only by trained personnel.
Other persons are not permitted to modify or repair the equipment.
»
Spare parts list 10-1
STT 110 / STT 160
STT 110 / STT 160
1
2
6
2
4
5
2, 3
7
Pos.
ID-number
Description
blower STT 110
blower STT 160
sealing
1
85677
85367
94233
85323
96196
23918
88366
88628
85819
85820
2
3
4
5
6
diffusor
desiccant
sealing
filter cartridge, when operating without return air cooler
filter cartridge, when operating with return air cooler
guide roll with fixing device
7
guide roll
Spare parts list 10-2
STT 110 / STT 160
Return air cooler (optional)
29786
83972
return air cooler
hose
Hopper heater
85343
84512
85652
radiator 1,5 kW
thermal breaker
temperature limiter
85338
84510
85652
radiator 3,0 kW
thermal breaker
temperature limiter
85363
84509
85652
radiator 6,0 kW
thermal breaker
temperature limiter
85651
84508
85652
radiator 9,0 kW
thermal breaker
temperature limiter
86371
89846
93303
86387
Pt 100 (3 m)
Pt 100 (6 m)
Pt 100 (9 m)
Pt 100 (12 m)
18232
84492
06925
air control flap
thermometer
flow indicator
Spare parts list 10-3
STT 110 / STT 160
Operating unit
5
4
3
2
6
7
1
Pos.
ID-number
Description
1
2
82368
main switch
82394
82393
82495
LED element, green
cap
fixing adapter
3
82494
82392
82495
LED element, white
cap
fixing adapter
4
5
26207
dew point display (optional)
82395
82490
selector switch actuator
contact element
6
7
87454
thermo regulator TT1 - TT6
85241
83646
timer clock (optional)
sealing
Spare parts list 10-4
STT 110 / STT 160
Control unit
86376
85675
95819
87440
83975
85275
88914
87933
83647
88907
99815
84982
84983
83624
84512
84511
84159
motor
radiator 2.4 kW
pull-button
contact element
controller
temperature limiter
contactor
power supply
cut-out
terminal
fuse
relay holder
relay
terminal
thermal breaker STT 110
thermal breaker STT 160
auxiliary switch
Spare parts list 10-5
STT 110 / STT 160
11. Electrical manual
This electrical manual is intended to be used only by Sterling service person-
nel and trained personnel authorized by Sterling.
»
Other persons are not permitted to modify or repair the equipment.
o Connection diagram no.: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
o Currently not available; will be delivered at a later date !
Electrical manual 11-1
STT 110 / STT 160
12. Accessories
o Basic setting thermo regulator
o Digital timer
o Spare parts list Drying Hoppers ST 25 - ST 6400
o _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
o _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Accessories 12-1
STT 110 / STT 160
Basic setting thermo regulator
This information is intended to be used only by Sterling service personnel
and trained personnel authorized by Sterling.
»
Settings, if temperature is displayed in C°
Other persons are not permitted to modify or repair the equipment.
Settings, if temperature is displayed in F°
Code
Code
C111
C112
C113
C114
SPL
0
2
0
1
0
0
0
0
5
0
0
1
0
0
3
0
4
4
0
0
4
1
0
0
C111
C112
C113
C114
SPL
0
2
0
1
0
0
0
0
5
0
1
2
0
3
3
0
0
8
0
0
4
1
4
4
SPH*
SPH*
* with return air cooler in use: 0 1 8 0
* with return air cooler in use: 0 3 5 6
Parameter
AL1
Parameter set 1
Parameter
AL1
Parameter set 1
20.0
1
68.0
1
HYS1
HYS1
rASd
5.0
rASd
19.0
Accessories 12-2
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