Sterling SCD 10 User Manual
SCD 10 Compressed Air Dryer
Part Number: 882.00280.00
Bulletin Number: DH1-625.1
Effective: 04/28/08
Write Down Your Serial Numbers Here For Future Reference:
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We are committed to a continuing program of product improvement.
Specifications, appearance, and dimensions described in this manual are subject to change without notice.
DCN No. ____________
© Copyright 2008
All rights reserved.
Shipping Info
Unpacking and Inspection
You should inspect the equipment for possible shipping damage.
Thoroughly check the equipment for any damage that might have occurred in transit, such as
broken or loose wiring and components, loose hardware and mounting screws, etc.
In the Event of Shipping Damage
According to the contract terms and conditions of the Carrier, the responsibility of the
Shipper ends at the time and place of shipment.
Notify the transportation company’s local agent if you discover damage.
Hold the damaged goods and packing material for the examining agent’s inspection. Do not
return any goods before the transportation company’s inspection and authorization.
File a claim with the transportation company. Substantiate the claim by referring to the
agent’s report. A certified copy of our invoice is available upon request. The original Bill of
Lading is attached to our original invoice. If the shipment was prepaid, write us for a
receipted transportation bill.
Advise customer service regarding your wish for assistance and to obtain an RMA (return
material authorization) number.
If the Shipment is Not Complete
Check the packing list as back-ordered items are noted on the packing list. You should have:
; Compressed air dryer
; Bill of lading
; Packing list
; Operating and Installation packet
; Component instruction manuals
Re-inspect the container and packing material to see if you missed any smaller items during
unpacking.
If the Shipment is Not Correct
If the shipment is not what you ordered, contact the shipping department immediately at
[262] 641-8610. Have the order number and item number available. Hold the items until you
receive shipping instructions.
Returns
Do not return any damaged or incorrect items until you receive shipping instructions from the
shipping department.
10 CFM Compressed Air Dryer ii
Table of Contents
CHAPTER 1: SAFETY ...............................................................5
1-1 How to Use This Manual.............................................................................................5
Safety Symbols Used in this Manual.....................................................................5
1-2 General Safety Regulations ........................................................................................6
1-3 Responsibility..............................................................................................................6
1-4 Warnings and Precautions..........................................................................................7
CHAPTER 2: FUNCTIONAL DESCRIPTION ............................8
2-1 Models Covered in This Manual..................................................................................8
2-2 General Description.....................................................................................................8
2-3 Typical Features and Components .............................................................................8
2-4 Options........................................................................................................................8
2-5 Safety Features...........................................................................................................9
Safety Circuit Standards........................................................................................9
High Temperature Safety System .........................................................................9
Airflow monitoring Safety System..........................................................................9
Line Cord Plug (115/1/60 units only).....................................................................9
2-6 Drying Hopper Air Trap ...............................................................................................9
2-7 Remote Membrane Dryer for Low-Dewpoint Operation (Optional)...........................10
2-8 Microprocessor Controls ...........................................................................................11
Identifying the Controller’s Buttons and Indicators..............................................12
Understanding the Controller’s Parameters ........................................................13
2-9 Restoring Factory Default Settings............................................................................14
CHAPTER 3: INSTALLATION.................................................15
3-1 Uncrating the Equipment...........................................................................................15
3-2 Connecting a Hopper-Mount Dryer to a Hopper........................................................15
3-3 Connecting a Floor-Mount Dryer to a Hopper...........................................................16
3-4 Making Electrical Connections..................................................................................16
3-5 Making Compressed Air Connections.......................................................................17
3-6 Installing the Remote-Mount Membrane Dryer (Optional).........................................18
CHAPTER 4: OPERATION......................................................19
4-1 Auto-tuning the Dryer................................................................................................19
4-2 Setting the Alarm Value.............................................................................................19
4-3 Start-up......................................................................................................................20
4-4 Shut-down.................................................................................................................20
CHAPTER 5: MAINTENANCE.................................................21
5-1 Preventative Maintenance Schedule.........................................................................21
5-2 Cleaning and Replacing the Filters ...........................................................................21
5-3 Replacing the Process Heater...................................................................................21
CHAPTER 6: TROUBLESHOOTING.......................................22
10 CFM Compressed Air Dryer iii
CHAPTER 7: APPENDIX.........................................................25
7-1 Returned Material Policy...........................................................................................25
7-2 Technical Assistance………………………………………………………………………26
7-3
Technical Specifications............................................................................................27
Dryer Operating Parameters ...............................................................................28
Dimensions..........................................................................................................29
7-4 Spare Parts List........................................................................................................30
10 CFM Compressed Air Dryer iv
Chapter 1: Safety
1-1 How to Use This Manual
Use this manual as a guide and reference for installing, operating, and maintaining your
dryer. The purpose is to assist you in applying efficient, proven techniques that enhance
equipment productivity.
This manual covers only light preventative maintenance. No other maintenance should be
undertaken without first contacting a service engineer.
The Functional Description section outlines models covered, standard features, and safety
features. Additional sections within the manual provide instructions for installation, preoperational procedures, operation, and preventive maintenance.
The Installation chapter includes required data for receiving, unpacking, inspecting, and setup
of the dryer. We can also provide the assistance of a factory-trained technician to help train
your operator(s) for a nominal charge. This section includes instructions, checks, and
adjustments that should be followed before commencing with operation of the dryer. These
instructions are intended to supplement standard shop procedures performed at shift, daily,
and weekly intervals.
The Operation chapter includes a description of electrical and mechanical controls, in
addition to information for operating the dryer safely and efficiently.
The Maintenance chapter is intended to ensure that your dryer provides excellent, long
service.
The Troubleshooting chapter serves as a guide for identification of most common problems.
Potential problems are listed, along with possible causes and related solutions.
The Appendix contains technical specifications, drawings, schematics, parts lists, and
available options. A spare parts list with part numbers specific to your machine is provided
with your shipping paperwork package. Refer to this section for a listing of spare parts for
purchase. Have your serial number and model number ready when ordering.
Safety Symbols Used in this Manual
The following safety alert symbols are used to alert you to potential personal injury hazards.
Obey all safety messages that follow these symbols to avoid possible injury or death.
DANGER! DANGER indicates an imminently hazardous situation that, if not avoided,
will result in death or serious injury.
WARNING! WARNING indicates a potentially hazardous situation or practice that, if
not avoided, could result in death or serious injury.
Caution! CAUTION indicates a potentially hazardous situation or practice that, if
not avoided, may result in minor or moderate injury or in property damage.
10 CFM Compressed Air Dryer Chapter 1: Safety 5 of 30
1-2 General Safety Regulations
Read and follow the instructions in this manual before installing, operating or maintaining
any equipment. Additional copies are available from the manufacturer.
Install, operate, and maintain this equipment according to applicable work and safety codes
for your location. This includes OSHA, CE, NEC, CSA, SPI, and many other local, national,
and international regulations. Only qualified persons should work on or with this equipment.
Work only with approved tools and devices.
Before removing, adjusting, or replacing parts on a machine, remember to turn off all air and
electric supplies and all accessory equipment at the machine. You must also disconnect and
lock out electrical and pneumatic power and attach warning tags to the disconnect switch and
air shut off valve.
When you need to perform maintenance or repair work on a dryer above floor level, use a
solid platform or a hydraulic elevator. If there is a permanently installed catwalk on your
dryer, use it. The work platform should have secure footing and a place for tools and parts.
Do not climb on dryers, machines, or work from ladders.
If you need to repair a large component, use appropriate handling equipment. Before you use
handling equipment (portable “A” frames, electric boom trucks, fork trucks, overhead
cranes), be sure the load does not exceed the capacity of the handling equipment or cause it to
become unstable. Carefully test the condition of lifting cables, chains, ropes, slings, and
hooks before using them to lift a load.
Be sure that all on-current carrying parts of electrical apparatus, electrical enclosures, and the
dryer frame are correctly connected to earth ground with an electrical conductor that complies
with current codes Install in accordance with national and local codes, which apply.
When you have completed the repair or maintenance procedure, check your work, remove
your tools, rigging, and handling equipment. Do not restore power to the dryer until all
persons are clear of the area. Do not start and run the dryer until you are sure all parts are
functioning properly.
1-3 Responsibility
These machines are constructed for maximum operator safety when used under standard
operating conditions and when recommended instructions are followed in the maintenance
and operation of the machine.
All personnel engaged in the use of the machine should become familiar with its operation as
described in this manual.
Proper operation of the machine promotes safety for the operator and all workers in its
vicinity.
Becoming familiar with materials, inspection, and maintenance and total user responsibility
will assist you in learning potential areas in need of observation for danger.
Each individual must take responsibility for observing the prescribed safety rules as outlined.
All caution, warning and danger signs must be observed and obeyed. All actual or potential
danger areas must be reported to your immediate supervisor.
10 CFM Compressed Air Dryer Chapter 1: Safety 6 of 30
1-4 Warnings and Precautions
Our equipment is designed to provide safe and reliable operation when installed and operated
within design specifications, following national and local safety codes.
To avoid possible personal injury or equipment damage when installing, operating, or
maintaining this dryer, use good judgment and follow these safe practices:
; Never place your hands or any part of your body in any dangerous location.
; Never operate, service, or adjust the dryer without appropriate training and first
reading and understanding this manual.
; Never try to pull material out of the dryer with your hands while it is running.
; Before you start the dryer, remove all objects (tools, nuts, bolts, clamps, bars) from
the hopper area.
; If your dryer has been inoperative or unattended, check all settings before starting the
unit.
; At the beginning of your shift and after breaks, verify that the controls and other
auxiliary equipment are functioning properly.
; Keep all safety guards in place and in good repair. Never attempt to bypass, modify,
or remove safety guards. Such alteration is not only unsafe, but will void the
warranty on your equipment.
; When changing control settings to perform a different mode of operation, be sure
selector switches are correctly positioned. Locking selector switches should be
adjusted only by authorized personnel, and the keys removed after setting.
; Report unsafe operation, unsafe conditions, unusual dryer action, leakage, and
improper maintenance immediately.
; Never stand or sit where you could slip or stumble into the dryer while working on it.
; Do not wear loose clothing or jewelry, which can be caught while working on a
dryer. In addition, cover or tie back long hair.
; Clean the dryer and surrounding area daily, and inspect the machine for loose,
missing, or broken parts.
; Shut off power to the dryer when it is not in use. Turn the switch to the off position,
or unplug it from the power source.
; Never attempt to move the dryer while it is in operation.
; Always allow time for the dryer to cool off before moving it or servicing the fuse or
air filter.
We have long recognized the importance of safety and have designed and manufactured our
equipment with operator safety as a prime consideration. We expect you, as a user, to abide
by the foregoing recommendations in order to make operator safety a reality.
10 CFM Compressed Air Dryer Chapter 1: Safety 7 of 30
Chapter 2: Functional Description
2-1 Models Covered in This Manual
This manual provides instructions for installing and operating your 10 cfm compressed air
dryer.
2-2 General Description
Mini compressed air dryers are designed to generate heated, dehumidified air at carefully
controlled temperatures for use in plastic drying systems. Drying systems are sized to meet
specific requirements stated by the purchaser at the time of purchase.
Moisture removal from hygroscopic (moisture attracting) plastic pellets is an essential step in
the manufacture of high-quality plastic products. This dehumidifying dryer is used to
generate very low dew point air, heated to a controlled temperature for drying plastic pellets
and regrind.
Many variables were considered in the selection of your drying system, including type of
materials, residence time, throughput of the extruder or injection molding machine. Should
your operating environment change, the manufacturer can advise you on necessary equipment
and process time and temperature modifications required for your system.
2-3 Typical Features and Components
Electrical solenoid valve
Compressed air filter, regulator, and gauge
Drying temperature range of 120ºF to 400ºF
Display of process temperature set point and actual settings
Process thermocouple located in the process air stream just before the hopper inlet
Nema 1 control enclosure:
a. Fusing
b. Power On light
c. IEC process heater contactor
d. Solid state relay
e. Alarm light
f. High temperature safety system
g. Airflow detection system
2-4 Options
Options can tailor your dryer to meet the exact requirements of the drying task being
performed.
Floor-mount configuration
Membrane compressed air dryer for low dew point operation
220/1/50 operation
230/1/60 operation
10 CFM Compressed Air Dryer Chapter 2: Functional Description 8 of 30
2-5 Safety Features
This section includes information on safety devices and procedures that are inherent to the 10
cfm compressed air dryer. This manual is not intended to supersede or alter safety standards
established by the user of this equipment. Instead, the material contained in this section is
recommended to supplement these procedures in order to provide a safer working
environment.
Safety Circuit Standards
Safety circuits used in industrial systems protect the operator and maintenance personnel
from dangerous energy. They also provide a means of locking out or isolating the energy for
servicing equipment.
Various agencies have contributed to the establishment of safety standards that apply to the
design and manufacture of automated equipment. The Occupational Safety and Health
Administration (OSHA) and the Joint Industrial Council (JIC) are just a few of the
organizations that have joined with the plastics industry to develop safety standards.
Every effort has been made to incorporate these standards into the design of the dryer;
however, it is the responsibility of the personnel operating and maintaining the equipment to
familiarize themselves with the safety procedures and the proper use of any safety devices.
High Temperature Safety System
A high temperature safety system will disable the dryer if the process temperature is too hot.
The high temperature safety is designed so that if it fails, the failure causes a “safe”
condition, and the dryer will not run. The compressed air continues flowing to cool down the
system.
Airflow monitoring Safety System
If the airflow source to the compressed air dryer is below 35 PSI, the unit will shut down and
not run. This is an indication that there is not enough pressure and flow for proper operation
of the unit.
Line Cord Plug (115/1/60 units only)
The line cord plug allows the operator or maintenance personnel to unplug the dryer from its
power source and tag it out. This plug may be tagged with any number of approved electrical
lockout tags. These tags are available at most electrical supply stores. Always disconnect
power before servicing or moving this unit.
DANGER! At no time should anyone remove the lockout or reconnect the twist plug,
other than the person who installed the lockout or who unplugged the twist
plug.
2-6 Drying Hopper Air Trap
Refer to the drying hopper Operation and Installation manual for proper operation of the
drying hopper.
10 CFM Compressed Air Dryer Chapter 2: Functional Description 9 of 30
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