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Sterling
manual Operation Instructions, Dehumidified air dryer STT40 STT70
Models:
STT40
STT70
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Troubleshooting
Install
Parts list
Functional diagram of STT40 / STT70
Dimension
Maintenance
Symptoms of Worn Desiccant
Assembly
Error and error correction
For operation with the optional timer clock
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Operation Instructions
Dehumidified air dryer STT40
STT70
Sterling Material Processing
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Contents
Dehumidified air dryer STT40 STT70
Operation Instructions
Sterling Material Processing
Sterling Material Processing
Technical service Service department
5200 West Clinton Ave Milwaukee, WI
Telephone
STT40 / STT70
Table of contents
STT40 / STT70
1.1. Warnings and symbols
1. General Information
Caution High noise pollution
1.3. Legal basis
1.2. Explanations and information
1.4. Field of application
1.5. Notes on Usage
Safety instructions
2. Safety instructions
STT40 / STT70
2.1 General
2.1.2. Operation
2.1.1. Assembly
2.1.3. Maintenance
2.2. For the safety of the device
STT40 / STT70
3. Start up
Start up
3.1. Initial Operation
3.1.1. Switching on the Dryer
Wait until the blower has stopped
The “power” signal lamp turns off
For operation with the optional timer clock
3.2.1. Switching the Dryer on
For operation without timer clock
3.2. Continuous Operation
3.2.2. Setting the Drying Temperature
If “tunE” stops flashing, Autotuning is finished
Autotuning the temperature controller
Press the “EXIT” key for at least 2 seconds
Press the “EXIT” key
The “power” signal lamp turns off
3.3. Switching the Dryer off
Wait until the blower has stopped
Error and error correction
4. Error and error correction
STT40 / STT70
Regeneration heater
The following errors can cause an alarm Blower
Regeneration heater
Hopper heater
5. Maintenance
Please observe the maintenance schedule
Photocopythis page for your maintenance records
5.1. Maintenance schedule
System model #
Serial #
5.2.1. Servicing Process Air Filters
5.2. Preventative Maintenance
DO NOT clean/wash filter with water
Figure 1 Air Filter Location & Disassembly
when operating without return air cooler ID
when operating with return air cooler ID
The sensor will be destroyed
5.2.3. Servicing the Dew Point Monitor
5.3.1. Symptoms of Worn Desiccant
5.3. Corrective Maintenance
FIRST AID
5.3.2. Replacing Worn Desiccant
Figure 2 Desiccant Bed Location and Disassembly
DESICCANT BEDS ARE HOT DURING OPERATION
Remove Hose Clamps Remove Clamp
Figure 3 Required Desiccant Amounts
5.4. Disposing of Drying Agents
5.5. Replacing the Process Heater
Figure 4 Process Heater Location and Disassembly
Figure 5 Cooling Coil Location and Disassembly
5.5.1.Replacing/Cleaning the Cooling Coils
Hazardous electrical current present
5.5.2. Replacing the regeneration heating coil
Figure 6 Heating Coil Location and Disassembly
Hazardous electrical current present
Heating Coil
5.6. Cleaning the Drying Hopper
Figure 8 STT 60 - STT
Figure 7 STT
STT
STT40 / STT70
6. Functional description
Functional description
The dryer is rated for continuous operation
6.1. General Information
➅➄ ➃
Figure 9 Functional diagram of STT40 / STT70
Figure 10 Operating unit
Read the timer clock operating manual
Figure 11 Drying Hopper
6.2. Drying Hopper Optional
6.2.1. Hopper Heater
Figure 12 Temperature controller
PARAMETERS THAT ARE CHANGED IN TESTING AREA
DEFAULT SETTINGS FOR JUMO TEMP. CONTROLLER
PARAMETERS THAT ARE NOT CHANGED FACTORY DEFAULTS
Contact information
Figure 13 Suction Box
6.4. Return Air Cooler Optional
Transporting, Assembly and Storage
7. Transporting, Assembly and Storage
STT40 / STT70
7.1. Transporting and Packing
7.3. Storage
7.2. Assembly
8. Assembly instructions
8.1.Installation of the exhaust fan for regeneration of exhaust
STT40 max. 1.1 kW, STT70 max. 2.0 kW
8.3. Electrical Connection
The fuse protection must have STT40 16 A
STT70 16 A
8.4. Connection of Return Air Cooler Optional
Problem
9. Troubleshooting
9.1. Introduction
Possible cause
Process heaters are faulty
Problem
Possible cause
Corrective action
Possible cause
Problem
Corrective action
Using a Platinum Resistance Thermometer
Using a Thermocouple
Problem
Possible cause
10.1. STT40
10. Technical data
10.2. STT70
Return Air Cooler optional
10.3. Dimension Sheet
Spare parts list
11. Spare parts list
STT40 / STT70
ID-number
STT40
Description
Return air cooler optional
ID-number
STT70
Description
Return air cooler optional
ID-number
Operating unit
Description
Hopper heater
Control unit STT40
Control unit STT70
Hopper heater
STT40 / STT70
12. Electrical manual
Electrical manual
Accessories
13. Accessories
STT40 / STT70
Code
Basic temperature controller settings STT40
Parameter
Parameter set
Code
Basic temperature controller settings STT70
Parameter
Parameter set
14.1. for STT 40 Dryer
14. Quick Start Guides
OFF On with timer
On without timer
5.Turn the hopper heater switch to position “I”
Position “O” Position “I”
Process Display LED “Status” LED Ramp/Program
Set Point PGM Arrow down
EXIT Arrow up
Note Due to the following circumstances
Page
Position “O” Position “I” OFF
14.2.Proper Shut-downGuide for STT 40 Dryer
OFF On with timer
On without timer
Main power High Temp Safety
14.3. Quick Start Guide for STT 70 Dryer
Position “O” Position “I”
EXIT
Set Point PGM Arrow down
Process Display LED “Status” LED Ramp/Program
initial dryer start-up
Note Due to the following circumstances
Position “O” Position “I” OFF
14.4. Proper Shut-downGuide for STT 40 Dryer
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Sales Department
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