Dri-Air Industries AHM 2-4 User manual

1
Contents
HM DRYERS...................................................................................................................2
INSTALLATION PROCEDURE.......................................................................................5
QUICK START-UP GUIDE..............................................................................................5
DRYER OPERATION TROUBLE SHOOTING................................................................7
PART LIST......................................................................................................................9
ADVANCED DRYER CONTROLS GUIDE....................................................................11
MAIN OPERATING SCREEN: ......................................................................................11
MENU INSTRUCTIONS:...............................................................................................11
TO START DRYER:......................................................................................................12
TO SET TEMPERATURE:............................................................................................12
MAIN MENU SELECTIONS..........................................................................................13
MAIN MENU SELECTIONS..........................................................................................14
MENU DEFINITIONS:...................................................................................................17
OTHER FEATURES:.....................................................................................................19
SETTINGS:...................................................................................................................20
ERROR MESSAGES:...................................................................................................21
TEMPERATURE SETBACK THEORY..........................................................................22
Hopper Ban
ADC ADVANCED DRYER CONTROL –AHM 2-4
OPERATING MANUAL

2
HM DRYERS
FEATURES:
The HM series dryers are a fully assembled dryer and hopper combination where the dryer is
mounted on the hopper to be positioned on top of molding machines. They are ideal where floor
space is not available and material changes are infrequent. The HM dryer series utilize the
ARID-X dual bed design that provides a constant supply of dry air to the material hopper.
Arid-X Two Bed Design
While one bed is removing moisture from the process air the other is regenerating by heating
the desiccant to a high temperature. Once the regenerated bed cools down, the Zone Valve
switches the airflow, and the newly regenerated bed is used to desiccate the process air stream.
The saturated bed is now regenerated in the same manner, completing the regeneration cycle
The airflow design of the ARID-X dryers makes the regeneration cycle more efficient because
we utilize a small amount of the desiccated process air rather than ambient air to regenerate the
desiccant bed. This reduces the impact of the high moisture content of the ambient air, which
would contaminate the desiccant bed, and allows the dryer to attain a lower dew point. Please
see the Air Flow Schematic on Page 4.
Dryer process operating temperatures are 140 degrees F (minimum) to 325 degrees F
(maximum) with an accuracy of +/- 3 degrees. When the drying temperature is 275 degrees F
or higher, it is necessary to install a water-cooled heat exchanger on the return hose of the dryer
to ensure maximum dryer efficiency. If you do not have a heat exchanger and will be operating
275 degrees F or higher, please contact the factory for heat exchanger pricing.
Hopper Design
Dri-Air’s “all stainless” hopper design utilizes a stainless-steel inner shell surrounded by a
stainless-steel jacketed insulation layer. The easily removable stainless steel spreader cone
promotes proper material flow to ensure that the material is dried efficiently and no dried
material is left at the hopper bottom that needs to be fed out prior to operating. You must ensure
that your hopper is adequately sized for your usage rate and is kept filled, to ensure that you
have sufficient time to dry the material.

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ADC Advanced Dryer Controls
The ARID-X series can be supplied with the Advanced Dryer Control (ADC).
The new ADC (Advanced Dryer Control) was introduced for optimum operation of the dryer and
is as user friendly as possible. The easy-to-see alphanumeric display indicates all operating
parameters and leads the operator through a menu driven program for all settings and
information. All fault conditions are shown on the display in a format that is easy to understand.
As with earlier designs, the ADC is driven by thermocouples strategically located in the towers,
hoses to the hoppers, and other locations to properly control the operation of the dryer. Other
inputs monitor the performance of the dryer for safe and efficient operation.

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5
INSTALLATION PROCEDURE
Electrical Connection:
Open electrical access door on the front of the machine by turning the disconnect off and
turning the lower clamping screw 1/2 turn counterclockwise. Locate the disconnect by following
the operating handle down to the electrical panel.
Insert the incoming power cable or conduit through the hole provided on the side of the
machine. Wire incoming power to the top of the disconnect as shownin the diagramsbelow.
« use approved
wire and fastening
means «
3 PHASE DRYER INSTALLATION CHECK FOR CORRECT MOTOR ROTATION
BEFORE RUNNING DRYER
To check motor rotation.......
Turn on the power to the dryer and press the ON/ START touch pad and then immediately press
the OFF/STOP touch pad. Observe the cooling fan on the top of the blower motor and verify the
fan is turning clockwise. If the motoris not turning clockwise, switch any two adjacent supply
wires.
QUICK START-UP GUIDE
Operating this unit is very simple. Once the dryer is connected to the facility power supply, the
unit can be started by turning the disconnect handle located in the upper right-hand corner of
the electrical panel enclosure to the ON position and pressing the POWER button on the
Control Panel Key Pad. To shut the dryer off, simply push the POWER button on the Control
Panel Key Pad.
Setting the process air temperature is done using the Digital Controller.
For a more detailed explanation, please refer to the ADC control section later in this manual.

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Temperature:
Set the process temperature by either pressing the “TEMP SET” button or “MENU” button.
High Temp Alarm Delta:
Press the “MENU” button and then arrow down to the ALARM MENU. Press enter to access
setting. Enter a new delta using the keypad and press ENTER. Remember this setting is a delta
above the set temperature and not an actual temperature.
Temperature Setback:
Going to the “SETBACK MENU” and pressing enter can actuate the temperature setback
feature. The display will indicate how to turn on or off this feature. The setback delta is factory
set for 30 degrees F based on field experience. If this value needs to be changed, go to the
“SETBACK MENU” and arrow down to SETBACK DELTA. A new value can then be entered. All
other variables are located in the FACTORY SETTINGS and will require assistance by our
servicemen to make any changes.
Selection Of Degrees F or C:
This setting is located in the menu section “SYSTEM SETUP”.
Seven-Day Timer:
Select the “SEVEN-DAY TIMER” menu. Press enter to access the days of the week and
ENTER again to set the times. Only one start and stop time per day is allowed. All times are in
Military time. See the section on menu selection for more detail.

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DRYER OPERATION TROUBLE SHOOTING
The Advanced Dryer Controls were designed for quick diagnosis of problems. .The following
steps should be done before proceeding with other diagnostic steps. Alarm codes that occur on
the ADC controls are further detailed in the controls section of this manual.
Check the Power Circuit:
1. Incoming fuses or circuit breaker
2. Check secondary fuses or circuit breakers.
3. Is power supplied to the unit?
4. Check heater continuity using a volt ohmmeter.
Compressed Air:
For those models that require compressed air.
5. Is compressed air connected with at least 60 PSI
6. Check water separator and drain if necessary
7. Pressure gage should read 60 PSI
Air Flow Circuit:
8. Ensure Zone Valve position is correct. Remove the hoses from the top of the
desiccant towers and compare the airflow to that in the provided airflow diagram in this
manual.
9. Make sure that all hoses are connected, not crushed, and free from obstructions.
10. Inspect filter and make sure cover is tight and the filter is clean and in good condition.
Control Circuit:
11. Using the ADC motherboard indicator lights as a guide for the dryer regeneration
cycle, check that all inputs/outputs are proper for the part of the regeneration cycle
that the machine is in.
12. Monitor the ADC output lights to ensure the corresponding LED on the power solid
state relay is illuminated and there is an output voltage to the heater.
Operating Conditions:
13. Check the process temperature. It should not be set below 140° F (60° C) because
the unit will go into high temp alarm.

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If the temp exceeds the set point check the following:
1. Remove the hose from the top of the hopper to check air flow. There should be air flow
out of the hopper with a suction on the hose. If there is little or no flow, check the inlet
hose.
2. Inspect the filter to make sure that it is clean and not affecting the air flow.
3. Check to see if one of the solid-state relays has failed on. Using an ammeter or
voltmeter on the output to the heater, see if there is power when the LED is not lit
which will indicate a failed relay.
4. Check the valve position.
The Dri-Air valve is designed to provide very little flow restriction and no leakage. It
incorporates high temperature spool for years of trouble-free service. The electrical
controls are built into the end of the valve for long lasting performance.
DO NOT PUT FINGERS INTO VALVE WITH POWER ON
Check all electrical connections to make sure they are tight.
Contact factory with the serial number of the dryer for a replacement valve.

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PART LIST
Voltage
208V
230V
400V
480V
575V
Cone
83342
83373
83982
83374
84235
Process
82343
82343
84204
82319
84065
Description
Part #
Amount
Valve Zone STC 24V Assembly
Smart touch
89167
1
Blower 25CFM 3PH
86867
1
Sensor RH ADC Control for
84936 RH Board Assembly
85374
1
Gasket 6” for 18-35 towers
81028
4
Filter Element 25-35 CFM
Dryers
81055
1
Thermocouple 1/8” x 6” Female
Type J
82174
4
Switch Pressure Ultra Low 1.5”
for ADC Blower Rotation
86155
1
Thermocouple 1/8” x 3” Female
Type J
87361
1

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Description
Part #
Amount
Contactor 12A 600V 4P 24VDC
LS
85355
1
Overload .4-.63 Amp
Overload .63-1 Amp
–LS Interchangeable w/ Carlo
Gavazzi
85358
85359
1
Relay SS 40A 480V 2P 15-32
VDC
85364
1
Switch Disconnect 40A (Handle,
Shaft, Switch)
85365
1
Relay 1P DT 24VDC 6A card
wago
89384
1
ADC Display Board
84930-1
1
ADC Keypad Membrane
85197
1
Mother Board ADC Rev3A
ADC/HMI
85584-1
1
Power Supply 24VDC 30W STC
89259
1

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ADVANCED DRYER CONTROLS GUIDE
MAIN OPERATING SCREEN:
Indicates Dryer is on..............................................................
*Indicates Setback is Turned On
Indicates Dryer is operating at 180 °F......................................
Indicates Dryer is in setback mode
with a new setting of (180 °F).............................................
Indicates a dewpoint of –45 °F and
Z1D indicates the status of the dryer mode.
Zone 1 is in regeneration healing mode........................................................................
MENU INSTRUCTIONS:
To make settings or view conditions within the dryer requires accessing the proper menu.
Process temperature settings can easily be changed using the TEMP/SET button.
To access the proper menu, press the MENU button.
Using the up and down arrows, go to the screen for the setting you want to make.
Press the ENTER button.
You can access the level within the menu selection using the up and down arrows.
After making changes, press the ENTER button.
To return to the operating screen at any time, press the CLEAR button
This will happen automatically after a 15 second Delay in any screen.
Dryer *ON
Process 180F
Setpoint (180)
Dewpoint -45 Z1H
Dryer *ON
Process 180F
Setpoint (180)
Dewpoint -45 Z1H
Dryer *ON
Process 180F
Setpoint (180)
Dewpoint -45 Z1H
Dryer *ON
Process 180F
Setpoint (180)
Dewpoint -45 Z1H

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TO START DRYER:
Turn power on using disconnect.
Screen will show: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Check for correct day and time.
Press Start
Dryer is checking the rotation.
If everything is proper- tests passed.
If a defect is detected, screen will indicate fault.
Running screen
*Indicates setback is activated
(180) Indicates setback temperature
Z1D Indicates dryer status
TO SET TEMPERATURE:
Press “Set Temp” button.
Set Temperature...................................................................................................
Initializing Dryer
Please Wait . . .
Tests Passed
Dryer *ON
Process 300F
Setpoint (180F)
Dewpoint -49F Z1DH
Initializing Dryer
Please Wait . . .
Testing Heaters
Dri-Air Industries
Dryer is
OFF
Time: Mon 09:42:05
Process Temp = 180F
Key in new value
Enter key to accept
or Clear to Exit

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MAIN MENU SELECTIONS
Set temperature at hopper..........................................................
Enable or disable temperature setback
Adjust delta
Adjust setback temperature inhibit time......................................
Set /Start and /Stop time per day.
Set time on clock.......................................................................
Set day of week.
Set high temperature alarm........................................................
Enable/disable dewpoint alarm.
Select °F for °C.
Current check ON/OFF.
Temperature calibration....................................................................
Dewpoint calibration.
Loader on time.
Loader Delay.
Factory settings............................................................................
(Factory use only)
View event log. View temperatures......................................................................
Main Menu
System Setup
↑ or ↓ to Scroll
Use Enter to select
Main Menu
Setback Setup
↑ or ↓ to Scroll
Use Enter to select
Main Menu
Seven Day Timer
↑ or ↓ to Scroll
Use Enter to select
Main Menu
Alarm Setup
↑ or ↓ to Scroll
Use Enter to select
Main Menu
Factory Settings
↑ or ↓ to Scroll
Use Enter to select
Main Menu
Diagnostics
↑ or ↓ to Scroll
Use Enter to select
Main Menu
Set Process Temp
↑ or ↓ to Scroll
Use Enter to select

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MAIN MENU SELECTIONS
Main Menu
Set Process Temp
↑ or ↓ to Scroll
Use Enter to select
Main Menu
Setback Setup
↑ or ↓ to Scroll
Use Enter to select
Process Temp = ___
Key in new value
Enter key to accept
or Clear to Exit
Enter password
Then press Enter
Password = 1285

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MAIN MENU SELECTIONS (cont.)
Main Menu
Seven Day Timer
↑ or ↓ to Scroll
Use Enter to select
Main>7Day Menu
Setup Sunday
↑ or ↓ to Scroll
Use Enter to select
Main>7Day Menu
Setup Saturday
↑ or ↓ to Scroll
Use Enter to select
Main>7Day Menu
Set Clock-Day
↑ or ↓ to Scroll
Use Enter to select
Main>7Day Menu
Set Clock-Time
↑ or ↓ to Scroll
Use Enter to select
Start Time Stop
Time
0000 0000
Enter Day 1=Sun
2=Mon 3=Tues 4=Wed
5=Thurs 6=Fri 7=Sat
Enter New Time _ _ _ _
Main>Alarm Menu
Set Temp Alarm
↑ or ↓ to Scroll
Use Enter to select
Main>Alarm Menu
Dewpt Alarm On-Off
↑ or ↓ to Scroll
Use Enter to select
Main>Alarm Menu
Dewpt Alarm Level
↑ or ↓ to Scroll
Use Enter to select
Main>Alarm Menu
Low Temp Alarm On-Off
↑ or ↓ to Scroll
Use Enter to select
Alarm Delta = ___
Key in new value
Enter key to accept
or Clear to Exit
Dewpoint Alarm
Press 1 to turn On
Press 2 to turn OFF
or Clear to exit
Low Temp Alarm
Press 1 to turn On
Press 2 to turn OFF
or Clear to exit
Alarm Level = ___
↑ or ↓ to Change
Enter key to accept
or Clear to Exit
Main Menu
Alarm Setup
↑ or ↓ to Scroll
Use Enter to select

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MAIN MENU SELECTIONS (cont.)
Main Menu
System Setup
↑ or ↓ to Scroll
Use Enter to select
Main Menu
Diagnostics
↑ or ↓ to Scroll
Use Enter to select
Main>System Menu
Degrees F or C,
↑ or ↓ to Scroll
Use Enter to select
Main>System Menu
Current Test On-Off
↑ or ↓ to Scroll
Use Enter to select
Main>System Menu
Temp Calibration
↑ or ↓ to Scroll
Use Enter to select
Main>System Menu
Dewpoint Calibration
↑ or ↓ to Scroll
Use Enter to select
Main>System Menu
Loader On Time
↑ or ↓ to Scroll
Use Enter to select
Main>System Menu
Loader Delay
↑ or ↓ to Scroll
Use Enter to select
Main>System Menu
Loader Cycles
↑ or ↓ to Scroll
Use Enter to select
Loader Cycles _
Key in Cycles
Enter key to accept
or Clear to Exit
Loader Delay _
Key in Seconds
Enter key to accept
or Clear to Exit
Loader On Time _
Key in Seconds
Enter key to accept
or Clear to Exit
Set DPoint Cal + 0
↑ or ↓ to Change
Enter key to accept
or Clear to Exit
Set Temp Cal + 0
↑ or ↓ to Change
Enter key to accept
or Clear to Exit
Current Test
Press 1 to turn On
Press 2 to turn OFF
or Clear to exit
Select F or C
Press 1 to turn F
Press 2 to turn C
or Clear to exit
Main>Diag Menu
View Event Log
↑ or ↓ to Scroll
Use Enter to select
Main>Diag Menu
View Temperatures
↑ or ↓ to Scroll
Use Enter to select
This will show the
Dryer’s last event
Temperatures -
Z1 Bottom = 75
↑ or ↓ to Scroll

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MENU DEFINITIONS:
1. Set Process Temp
This screen allows the operator to easily change the process temperature.
2. Setback Setup
For those dryers with the setback option, this screen allows the operator to activate
the setback option and to enter the setback delta from the process temperature for
the setback temperature. Remember this setting is a delta rather than the actual
setback temperature. For example, if the process temperature is 250 °F and the
delta is set for 30, the actual setback temperature will be 220 °F. This option
eliminates over drying of the resin if for any reason the process is interrupted for a
period of time. The dryer cannot be set with a setback delta equal to or greater than
the high temp alarm delta.
3. Seven-Day TIMER
The dryer can be automatically started and stopped once per day using this feature.
In this menu, the operator can select the day of the week and time of day to turn the
dryer on and off. The days of the week are specified as Sunday, Monday, etc. and
the time is set in Military time. Each day can be set to start and stop, start only, stop
only, or have no events. A setting of 9999 means there is no time set.
4. Alarm Setup
The high temperature alarm is factory set for a 50 °F delta above the set
temperature. Again, this is a delta setting, so a setting of 50 means the high
temperature alarm will activate at 50 ° above the set temperature. While this setting
does not normally have to be changed, this screen is used to make changes. The
dewpoint alarm can be turned on or off within this menu also. The high temperature
alarm also shuts the dryer down and cannot be de-activated.
5. System Setup
This section is used to configure the dryer for various parameters.
• Selection of degrees F or C
• Temperature offset for calibration
• Dewpoint offset for calibration
• Closed loop loader fill time (With optional closed loop loader)

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• Loader Delay time (With optional closed loop loader)
6. Factory Setup
This section is reserved for factory settings and can only be accessed by a
password. If settings need to be changed in the field, consult one of our servicemen
to make the necessary changes.
7. Diagnostic Menu
The diagnostic menu is used primarily for trouble-shooting assistance. It allows our
servicemen and qualified repair personnel to view a history of events and other
pertinent information to locate the problem in a shorter period of time. Z1 indicates
Zone 1 and Z2 indicates Zone 2 in all displays. Included in this section:
• View Event Log - The last 128 events are stored in this area and can be
reviewed to spot any anomalies of operation. The last event is displayed first with
the prior events visible by pressing the down button.
• View Temperatures - All internal temperatures can be viewed in this section
while the dryer is running. Many factors of operation can be determined based on
the various temperatures.

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OTHER FEATURES:
Blower Error
If for any reason the phasing of the incoming power is incorrect, the blower will run in the
wrong direction causing the dryer to malfunction. If the blower direction is not correct, the
dryer will shut down and an error will be displayed. This condition can occur upon
installation or when moved within the plant.
Automatic Restart
In the event of a power failure, the dryer will not operate. If the power is restored within
30 seconds, the ADC control will check the status of the dryer and any alarms and
restart the dryer if all tests pass. This feature eliminates having to manually start our
dryers for a short duration power outage.
Loop Break Alarm (indicated as “LOOP” in an alarm)
This feature checks all actual temperatures compared to their set values to see if they
are approaching the set value. If the temperature does not reach its set value, the dryer
is shut down and the heater in question is displayed. One of the main reasons for this
feature is to locate a problem before it can cause any damage. One such condition
would be if the process thermocouple were to be removed from the input port of the
hopper resulting in an incorrect temperature and possible melt down of the resin.
Open Thermocouple Protection
All thermocouples are constantly monitored for correct operation. If one should fail, the
dryer will stop and an alarm indicating the failed thermocouple will be displayed.
Temperature Setback (optional)
This option prevents material from being over dried if the process is interrupted for a
period of time. When activated, the return temperature is compared to the set
temperature. If they are within certain specifications for a period of time, the process
temperature will be set back to a level where continued drying will not take place. This
setback condition is displayed by () parenthesis around the set temperature on the
display.

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SETTINGS:
Temperature:
Set the process temperature by either pressing the “TEMP SET” button or
“MENU” button.
High Temp Alarm Delta:
Press the “MENU” button and then arrow down to the ALARM MENU. Press
enter to access setting. Enter a new delta using the keypad and press ENTER.
Remember this setting is a delta above the set temperature and not an actual
temperature.
Temperature Setback: Password = 1285
Going to the “SETBACK MENU” and pressing enter can actuate the temperature
setback feature. The display will indicate how to turn on or off this feature. The
setback delta is factory set for 30 degrees F based on field experience. If this
value needs to be changed, go to the “SETBACK MENU” and arrow down to
SETBACK DELTA. A new value can then be entered. All other variables are
located in the FACTORY SETTINGS and will require assistance by our
servicemen to make any changes.
Selection Of Degrees F or C:
This setting is located in the menu section “SYSTEM SETUP”.
Seven-Day Timer:
Select the “SEVEN-DAY TIMER” menu. Press enter to access the days of the
week and ENTER again to set the times. Only one start and stop time per day is
allowed. All times are in Military time. See the section on menu selection for more
detail.