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P550W Series Air Dryers
User’s Guide
Models covered:
P550W
P550WH
P550WLP
P552W
P552WH
P552WLP
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
1. Welcome & Congratulations
Congratulations on your purchase of a new PUREGAS P550W Series Air Dryer! We
here at PUREGAS are very proud of our products and we are committed to providing you
with the best value and service possible.
We are sure that you will be satisfied with your new air Dryer and would like to thank
you for choosing PUREGAS for your air Dryer requirements. We also hope that you will
continue to choose us for your future air pressure and related product purchases.
For information about this and other PUREGAS products, please visit us on the web at:
www.puregas.com
2. Introduction
PLEASE READ THIS USER’S GUIDE THOROUGHLY AND SAVE FOR
FUTURE REFERENCE.
This User’s Guide is provided for the benefit of our customers and contains information
and direction specific to the PUREGAS P550W Series Air Dryers. Models covered
include P550W, P550WH, P550WLP, P552W, P552WH, and P552WLP. This guide
covers topics including: safety, specifications, installation, registration, operation, testing,
maintenance, replacement parts, service, and troubleshooting issues. Observation and
compliance with this User’s Guide will ensure the maximum life and efficiency of your
air Dryer.
This User’s Guide should be read thoroughly prior to installing, operating, or servicing
the air Dryer in order to become familiar with the recommended procedures. This will
minimize the possibility of personal injury or damage to the unit due to improper
operation or handling.
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P550W Series Air Dryers User’s Guide
3. Table of Contents
8.14 Connecting via Web Browser......................43
1. Welcome & Congratulations............................... 3
8.15 Using the Status Screen...............................45
8.16 Using the Config Screen .............................48
2. Introduction.......................................................... 3
8.17 Using the Event Screen ...............................51
8.18 Using the Alarm Screen ..............................52
3. Table of Contents ................................................. 4
8.19 Using the Firmware Screen .........................53
4. Safety & Warning Information .......................... 6
8.20 Connecting via SNMP.................................55
5. Overview & Specifications .................................. 8
9. Testing Your Dryer ............................................56
5.1 Product Description ........................................ 8
9.1 Safety & Warning Information......................56
5.2 Key Features ................................................... 8
9.2 Measuring Compressor Amp Draw...............57
5.3 P550W Series Air Dryer Models .................... 8
9.3 Measuring Compressor Voltage ....................58
5.4 Technical Specifications ................................. 9
9.4 Measuring Incoming Voltage........................60
5.5 Dryer Function Overview ............................. 10
9.5 Measuring Voltage from AC Step-Down
Transformer.........................................................61
6. Installing Your Dryer ........................................ 11
9.6 Testing Consistent Heatless Dryer Cycling...62
6.1 Safety & Warning Information ..................... 11
9.7 Testing Unloader Valve ................................64
6.2 Before You Begin ......................................... 12
9.8 Measuring Heatless Dryer Solenoid Voltage 65
6.3 Included Contents ......................................... 13
9.9 Testing Air Dryer Fan ...................................66
6.4 Required Tools and Materials....................... 13
9.10 Testing Compressor ON/OFF Cycling ........66
6.5 Installation Steps........................................... 14
9.11 Testing High Compressor Last Run Time
6.6 Installation Checklist .................................... 22
Alarm ..................................................................68
9.12 Testing Humidity Alarm and System
7. Registering Your Dryer..................................... 23
Shutdown ............................................................69
8. Operating Your Dryer....................................... 24
9.13 Testing High Outlet Pressure Alarm ...........71
8.1 Safety & Warning Information ..................... 24
9.14 Testing Low Outlet Pressure Alarm ............72
8.2 Connecting Air Supply Lines to the Dryer ... 25
9.15 Testing Air Fittings & Hoses for Leaks.......73
8.3 Depressurizing the Dryer .............................. 26
8.4 Powering the Dryer ON & OFF.................... 26
10. Maintaining Your Dryer..................................74
10.1 Safety & Warning Information....................74
8.5 Using the Front Panel Display ...................... 27
10.2 Six Month Maintenance ..............................76
8.6 Identifying Dryer Alarms.............................. 29
10.3 8,000 Hour Maintenance .............................77
8.7 Adjusting & Resetting Dryer Set Points ....... 31
8.8 Open Panel.................................................... 39
11. Replacement Parts & Accessories ...................78
8.9 Setting the System Pressure.......................... 39
8.10 Setting the Static Pressure........................... 40
8.11 Setting the Outlet Pressure.......................... 40
8.12 Connecting to Common Alarm Terminals.. 41
11.1 Dryer Parts ..................................................78
11.2 Dryer Parts cont...........................................79
11.3 Heatless Dryer Assembly Parts ...................80
11.4 Accessories for Your Dryer.........................81
8.13 Connecting to Power Fail Alarm Terminals 42
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P550W Series Air Dryers User’s Guide
13.16 Compressor Excessive AMP Draw ...........91
11.5 Ordering Parts from PUREGAS ................. 82
13.17 High Compressor Last Run Time Alarm...92
12. Service & Repair.............................................. 83
13.18 Can’t Create a High Compressor Last Run
12.1 Services Offered ......................................... 83
Time Alarm .........................................................92
12.2 Initiating a Service Transaction .................. 83
13.19 Compressor Rapid ON/OFF Cycling ........93
13.20 Contacting PUREGAS Technical Support 93
13. Troubleshooting Your Dryer .......................... 84
13.1 Before You Call PUREGAS....................... 84
14. Appendix ...........................................................94
13.2 Safety & Warning Information ................... 84
14.1 Wiring Diagram ..........................................94
13.3 Air Dryer Won’t Power ON........................ 85
14.2 Set Point Limits and Defaults......................95
13.4 Display Screen Not Functioning................. 86
14.3 SNMP Parameters .......................................96
13.5 High Outlet Pressure Alarm........................ 86
13.6 Can’t Create a High Pressure Alarm........... 86
15. Limited Warranty Agreement.........................97
13.7 Low Outlet Pressure Alarm ........................ 87
Registration Reminder ........................................97
13.8 Can’t Create a Low Pressure Alarm ........... 87
13.9 High Humidity ............................................ 88
16. Contacting PUREGAS .....................................98
13.10 Can’t Create a High Humidity Alarm /
16.1 General ........................................................98
Shutdown............................................................ 89
16.2 Sales ............................................................98
13.11 High Flow Rate Alarm.............................. 89
16.3 Service.........................................................98
13.12 High Cabinet Temperature Alarm............. 89
16.4 Technical Support .......................................98
13.13 Inconsistent Heatless Dryer Cycling......... 90
17. Notes ..................................................................99
13.14 Compressor Doesn’t Operate.................... 90
13.15 Compressor Won’t Build Pressure............ 91
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P550W Series Air Dryers User’s Guide
4. Safety & Warning Information
This section contains general information about safety and warning points to consider and
adhere to during installation, operation, and maintenance of your air Dryer. PLEASE
READ THIS SECTION BEFORE PERFORMING ANY OPERATION OR
PROCEDURE ON YOUR AIR DRYER.
Additional warnings specific to an operation or procedure will also be presented
throughout the following sections. These will include the
symbol as well as a label of
“WARNING!”, “CAUTION!”, or “IMPORTANT!”. Please be sure to pay close
attention for these warnings and read them as you encounter them.
WARNING!
For your safety, all the information in this User’s Guide must be
followed to minimize the risk of electrical shock, and prevent
property damage or personal injury.
WARNING!
Extreme care should be exercised to avoid contact with live
electrical circuits. Many procedures performed during installation,
operation, testing, and maintenance of this air Dryer require the
equipment to be running, creating a situation for potential electrical
shock. It is highly recommended that you remove all jewelry before
performing any procedures.
WARNING!
Internal surfaces may be hot. Use care when coming into contact
with internal components as there is a potential for some of these
components to become hot when in operation or standby.
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P550W Series Air Dryers User’s Guide
CAUTION!
Proper Installation & Maintenance as outlined in this User’s Guide is
extremely important to ensure the reliability and longevity of the
equipment as well as prevent damage or personal injury.
CAUTION!
Depressurizing the air Dryer may be necessary before performing
certain procedures. NEVER remove pressure sensing tubes from the
Control Board without depressurizing the air Dryer first, or damage to
the Control Board will occur.
CAUTION!
Incoming power to Dryer must be:

15 amp service recommended

10 amp slow blow fuse

110 - 125 VAC, 50/60 Hz for P550W models

208 - 253 VAC, 50/60 Hz, 1 Phase for P552W models
IMPORTANT!
Performing routine maintenance as outlined in the Maintaining Your
Dryer section will ensure optimal performance over the lifecycle of
your air Dryer.
IMPORTANT!
Performing procedures not described in this User’s Guide or installing
components not supplied by PUREGAS is NOT RECOMMENDED
AND MAY VOID THE WARRANTY.
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P550W Series Air Dryers User’s Guide
5. Overview & Specifications
5.1 Product Description
The P550W Series Air Dryers from PUREGAS are designed to intake wet ambient
air and remove the moisture for delivery to applications requiring a constant, ondemand source of dry, pressurized air. This process is fully automatic and will
remain consistent with minimal required periodic maintenance. These dryers are
designed specifically for indoor use.
The P550W Series Air Dryers employ a fully digital operating platform offering the
most accurate readings of Dryer variables, removable access panel allowing easier
access for adjustment and maintenance, and ultra quiet compressor with an industry
leading maintenance interval of 8,000 hours.
5.2 Key Features

LCD display of all operating parameters

Solid state microprocessor-based circuitry eliminates costly maintenance

Accurate humidity sensing within 0.1% RH

Quietest Dryer on the market - less than 50 dBA

Oil-less compressors with 8,000 hour maintenance interval
5.3 P550W Series Air Dryer Models
Model
P550W
P550WH
P550WLP
P552W
P552WH
P552WLP
Description
Single Pressure Outlet, 110- 125 VAC, 2-15 PSI
4-Bank Outlet Manifold, 110 - 125 VAC, 2-15 PSI
Low Pressure, Single Pressure Outlet, 110 – 125 VAC, 0.30 – 7.50 PSI
Single Pressure Outlet, 208 - 253 VAC, 2-15 PSI
4-Bank Outlet Manifold, 208 - 253 VAC, 2-15 PSI
Low Pressure, Single Pressure Outlet, 208 - 253 VAC, 0.30 – 7.50 PSI
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P550W Series Air Dryers User’s Guide
5.4 Technical Specifications
P550W
P550WH
Output
Capacity
Power
Requirements
Outlet
Pressure
Range
Outlet Air
Humidity
Compressor
Type
Drying
Method
Operating
Temperature
Range
Noise Level
Alarms
Outlet
Connections
Dimensions
P550WLP
P552W
P552WH
P552WLP
Normal: Up to 350 SCFD continuous
Maximum: 550 SCFD emergency
110 - 125 VAC,
50 / 60 Hz, 7.0 Amps
2 – 15 PSI
208 - 253 VAC, 1 Phase,
50 / 60 Hz, 3.5 Amps
0.30 – 7.50
PSI
2 – 15 PSI
0.30 – 7.50
PSI
Less than 2% RH
Two-cylinder, 1/3 HP, oil-less type
Heatless Desiccant
40 to 85 F (optimal)
51 dBA at 3’, 48 dBA at 10’
Standard alarms – complete readings of all critical measurement points,
individual alarm indication display, including SNMP communication
3/8”
3/8”
Press-toPress-tolock, 4lock, 43/8”
3/8”
O.D.
bank
bank
O.D.
3/8” O.D. tube fitting
tube
manifold
manifold
tube
fitting
with shut
with shut
fitting
off
off
valves
valves
12” D x 17.25” W x 27” H
Net Weight
74 lbs
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P550W Series Air Dryers User’s Guide
5.5 Dryer Function Overview
#
1
2
3
4
5
6
7
8
9
10
11
Component
Compressor
Heatless Dryer
Unloader Valve
Capacity Control Valve
Description
Compresses drawn in ambient air.
Removes moisture from compressed air.
Relieves excess Compressor head pressure.
Regulates System Pressure and prevents air from
bleeding back through the Heatless Dryer.
Humidity Sensor
Measures the Humidity of the compressed air.
Air Tank
Stores dry compressed air.
Static Pressure Regulator Regulates the Static Pressure (17 PSI).
Maintains constant pressure on the Flow Block
for accurate Flow measuring.
Flow Block
Measures the Flow of compressed air.
Outlet Pressure Regulator Regulates the Outlet Pressure.
Pressure Outlet
Outputs the pressure set by the Outlet Pressure
Regulator.
4-Bank Outlet Manifold
Distributes the air into 4 separate outlets.
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PUREGAS, LLC
P550W Series Air Dryers User’s Guide
6. Installing Your Dryer
6.1 Safety & Warning Information
WARNING!
Internal surfaces may be hot. Use care when coming into contact
with internal components as there is a potential for some of these
components to become hot when in operation or standby.
WARNING!
Extreme care should be exercised to avoid contact with live
electrical circuits. Many procedures performed during
installation, operation, testing, and maintenance of this air Dryer
require the equipment to be running, creating a situation for
potential electrical shock. It is highly recommended that you
remove all jewelry before performing any procedures.
CAUTION!
Proper Installation & Maintenance as outlined in this User’s Guide
is extremely important to ensure the reliability and longevity of the
equipment as well as prevent damage or personal injury.
CAUTION!
Incoming power to Dryer must be:

15 amp service recommended

10 amp slow blow fuse

110 - 125 VAC, 50/60 Hz for P550W models

208 - 253 VAC, 50/60 Hz, 1 Phase for P552W models
Page 11 of 99
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
IMPORTANT!
Performing procedures not described in this User’s Guide or
installing components not supplied by PUREGAS is NOT
RECOMMENDED AND MAY VOID THE WARRANTY.
6.2 Before You Begin
6.2.1 Carefully inspect the unit, including the shipping box as well as the air
Dryer, for ANY DAMAGE CAUSED BY SHIPPING. If any shipping
damage is detected, it is important to file a claim with the shipping
company prior to continuing the installation procedures.
6.2.2 Read the entire Installing Your Dryer section to familiarize yourself with
the components and procedures before performing the air Dryer installation.
6.2.3 Verify the installation location of the air Dryer:
6.2.3.1 Well ventilated and free from abrasive dust or chemicals.
6.2.3.2 Ambient temperature is between 40° and 85° F (optimal).
NOTE: Higher temperatures will decrease component lifespan.
6.2.3.3 Meets the following power requirements:

110 - 125 VAC for P550W, P550WH and P550WLP models

208 - 253 VAC, 1 Phase for P552W, P552WH and P552WLP models

All models require 50/60 Hz and minimum 15 amp service with a 10
amp slow blow fuse
6.2.4 Notify the alarm center of the installation and potential for alarms during
the process (as necessary).
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P550W Series Air Dryers User’s Guide
6.3 Included Contents
(1) P550W Series Air Dryer
(1) Installation Guide (not shown)
Package located inside the Dryer:
(1) 120 VAC Power Cord (P550W, P550WH, P550WLP)
(1) 220 VAC Power Cord (P552W, P552WH, P552WLP)
(4) Connector, Male 1/4 MPT (P550WH, P552WH)
(1) Tee Tube Union
(1) Precision Bleed Orifice
(1) User’s Guide (not shown)
(1) Mini CD (not shown)
6.4 Required Tools and Materials

Medium adjustable wrench

Cup of soapy water

Box Cutter

1-inch paint brush
(recommended)
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P550W Series Air Dryers User’s Guide
6.5 Installation Steps
6.5.1 Using a box cutter remove
the Dryer from box and all
shipping materials.
NOTE: If ANY SHIPPING
DAMAGE is detected, file a
claim with the shipping
company prior to continuing
the installation procedures.
6.5.2 Open panel latches and
remove the front panel.
6.5.3 Check for loose parts,
hoses, or wiring.
NOTE: If ANY SHIPPING
DAMAGE is detected, file a
claim with the shipping
company prior to continuing
the installation procedures.
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P550W Series Air Dryers User’s Guide
6.5.4 Remove the ship-loose
contents package.
For P550WH and P552WH dryers:
6.5.5 Install the Outlet Port
Fittings:
6.5.5.1 Remove four (4)
Outlet Port plugs.
6.5.5.2 Install four (4) Outlet
Port Connectors.
6.5.6 Place the Dryer at the desired operating location:

Place the Dryer on a leveled surface

For rack install use Universal Rack Mounting Kit P011674 (section
11.4 )

For wall install use Wall Mounting Kit P011773 (section 11.4 )
6.5.7 Verify that the Dryer is
powered OFF.
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P550W Series Air Dryers User’s Guide
6.5.8 Plug AC Power Cord to Dryer.
6.5.9 Wire or plug the power
cord into:

110 - 125 VAC power
outlet for P550W,
P550WH, and
P550WLP models

208 - 253 VAC, 1 phase, power outlet for P552W, P552WH, and
P552WLP models.
o Line – Black (Brown)
o Neutral – White (Blue)
o Ground – Green (Green/Yellow)
6.5.10 Power the Dryer ON.
NOTE: The compressor and
heatless Dryer will start,
creating air flow through the
Outlet Port.
For P550WH and P552WH dryers:
6.5.11 Open the first Outlet Port
slightly to create a small
amount of air flow.
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P550W Series Air Dryers User’s Guide
6.5.12 Set the System Pressure:
With Compressor running:
6.5.12.1 Pull the Capacity
Control Valve knob out.
6.5.12.2 Turn the knob until
the reading on the
pressure gauge is 50
PSI.
6.5.12.3 Push the knob in to
lock.
6.5.13 Let the Dryer run until the
Humidity drops below 2%.
(may take up to 15 minutes).
NOTE: Press the RESET
button if the Dryer goes into
SHUTDOWN mode.
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P550W Series Air Dryers User’s Guide
6.5.14 Power the Dryer OFF.
For P550W, P550WLP, P552W and P552WLP dryers:
6.5.15 Remove the Precision
Bleed Orifice from the Outlet
Port.
NOTE: Save this orifice for use in
low flow applications.
6.5.16 Connect the air supply line(s):
For P550W, P550WLP, P552W and P552WLP dryers:
6.5.16.1 Connect the air
supply line to the Outlet
Port.
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P550W Series Air Dryers User’s Guide
For P550WH and P552WH dryers:
6.5.16.2 Connect up to four
(4) air supply lines to
the Dryer Outlet Ports.
Open Outlet Ports as
required.
NOTE: For all dryers with minimal flow:
Install the Tee Tube Union
and the Precision Bleed
Orifice to maintain a constant
air flow.
(The orifice was removed in
step 6.5.15 for the W and
WLP dryers or included in
the ship-loose package for the
WH dryers.)
6.5.17 Power the Dryer ON.
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P550W Series Air Dryers User’s Guide
6.5.18 Set the Static Pressure:
6.5.18.1 Pull Static Pressure
Regulator knob out.
6.5.18.2 Turn knob until the
reading on the pressure
gauge is 17 PSI.
6.5.18.3 Push knob in to lock.
6.5.19 Set the Outlet Pressure:
6.5.19.1 Pull the Outlet
Pressure Regulator knob
out (or loosen the
retaining nut – LP
Models).
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P550W Series Air Dryers User’s Guide
6.5.19.2
Turn knob until
Outlet Pressure (OUTP)
reading is at the desired
setting.
6.5.19.3 Push knob in to lock
(or tighten the retaining
nut – LP Models).
6.5.20 Check for air leaks:
NOTE: This is a general procedure that can be applied to any fitting or hose
that has air pressure in it. DO NOT SOAP TEST THE HUMIDITY
SENSOR FITTING. DAMAGE TO THE SENSOR MAY OCCUR.
With Compressor NOT running:
6.5.20.1 Listen for any ‘hissing’ sounds which may indicate a fitting or hose
air leak.
With Compressor running:
6.5.20.2 Use a 1-inch paint
brush to dab soapy water
on the air fitting or hose
connection to be tested.
If air bubbles appear at the
connection, this indicates that
air is leaking from the
connection.
If any leaks are detected, take steps to seal them off (as necessary):

Tighten the fitting

Re-connect the hose end

Replace the fitting / hose / component
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P550W Series Air Dryers User’s Guide
6.5.21 Re-install the front panel.
6.5.22 REGISTER YOUR DRYER. See section 7. for details.
6.6 Installation Checklist
 No shipping damage was detected.
 Dryer location meets the following requirements:
o Well ventilated
o Free from abrasive dust or chemicals
o Ambient temperature is between 40° and 85° F (optimal)
 System Pressure is set to 50 PSI.
 Static Pressure is set to 17 PSI.
 No air leaks are present in the system.
 No alarms are present on the Display Panel.
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P550W Series Air Dryers User’s Guide
7. Registering Your Dryer
Please take a moment to register your PUREGAS P550W Series Air Dryer.
Registering is necessary to activate the Limited Warranty on your product. Once you
register, you are eligible to receive free technical support, as well as updates
concerning your PUREGAS products.
Register Online at
www.puregas.com/registration
Or by Phone
1-800-521-5351 (option 2)
Have the following information available:
Model #:
Serial #:
Company Name:
Location Name:
Shipping Address:
City:
State:
Contact Name:
Zip Code:
Phone #: (
)
-
ext.
Email:
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PUREGAS, LLC
P550W Series Air Dryers User’s Guide
8. Operating Your Dryer
8.1 Safety & Warning Information
WARNING!
Extreme care should be exercised to avoid contact with live
electrical circuits. Many procedures performed during
installation, operation, testing, and maintenance of this air Dryer
require the equipment to be running, creating a situation for
potential electrical shock. It is highly recommended that you
remove all jewelry before performing any procedures.
WARNING!
Internal surfaces may be hot. Use care when coming into contact
with internal components as there is a potential for some of these
components to become hot when in operation or standby.
IMPORTANT!
Performing procedures not described in this User’s Guide or
installing components not supplied by PUREGAS is NOT
RECOMMENDED AND MAY VOID THE WARRANTY.
Page 24 of 99
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P550W Series Air Dryers User’s Guide
8.2 Connecting Air Supply Lines to the Dryer
For P550W, P550WLP, P552W and P552WLP dryers:
8.2.1 Connect the air supply line
to the Outlet Pressure port.
For P550WH and P552WH dryers:
8.2.2 Connect the air supply
line(s) to the Outlet Pressure
port(s).
8.2.3 Open Outlet Ports as
required.
NOTE: For all dryers with minimal flow:
Install the Tee Tube Union
and the Precision Bleed
Orifice to maintain a constant
air flow.
CAUTION: Be careful when removing outlet plugs or connected Air Supply
Lines. System may be pressurized.
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P550W Series Air Dryers User’s Guide
8.3 Depressurizing the Dryer
CAUTION: Be careful when removing air hose. System is pressurized.
8.3.1 Disconnect air hose from
the quick disconnect
connector located on top of
Outlet Pressure Regulator.
8.3.2 To prevent pressure from building back up, power the Dryer OFF (See
section 8.4 ).
8.3.3 Reconnect air hose.
8.4 Powering the Dryer ON & OFF
CAUTION!
Incoming power to Dryer must be:

15 amp service recommended

10 amp slow blow fuse

110 - 125 VAC, 50/60 Hz for P550W models

208 - 253 VAC, 50/60 Hz, 1 Phase for P552W models
8.4.1 POWER Switch - Controls
the main power to the Dryer.
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P550W Series Air Dryers User’s Guide
8.5 Using the Front Panel Display
CAUTION!
The Display Screen is covered by a clear protective layer that
guards against Electrostatic Discharge (ESD). DO NOT REMOVE
THIS LAYER.
8.5.1 ALARM LED – Indicates an alarm is present.
8.5.2 RESET Button – Clears an alarm and allows the system to continue
operating.
8.5.3 HOLD Button – Freezes the current information screen on the display.
When pressed again, it will allow the information screens to begin cycling
again.
8.5.4 Arrow Buttons – Used to access, navigate, and change values in the Set
Point Adjust screens.
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P550W Series Air Dryers User’s Guide
8.5.5 Display Screen - Shows the current Dryer readings. Will cycle between
the following information screens (unless the HOLD button has been
pressed):
8.5.5.1 Tank Screen
TANK – Air Tank pressure - fluctuates between 20 – 50 PSI.
OUTP – Outlet Pressure regulated by the Outlet Pressure Regulator
HUMIDITY – Humidity level of the system.
CABINET – Temperature of the Dryer cabinet compartment.
8.5.5.2 System Stat Screen
SYSTEM STAT - Running Status of the system:

ON RUN – System is Online.

SHUTDOWN – System has been shutdown as a result of either a
Humidity or High Cabinet Temperature alarm.
LAST RUN – How many minutes the compressor ran during the last Air
Tank pressurization cycle.
TTL TIME – How many hours the compressor has run since the last
Comp Run Reset.
FLOW – Air Flow Rate
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8.6 Identifying Dryer Alarms
8.6.1 High Outlet Pressure Alarm Occurs when the Outlet Pressure
(OUTP) rises above the alarm
set point for more than one (1)
minute.
(Default setting is 10.0 PSI for Standard models / 7.50 PSI for LP models)
See section 13.5 for troubleshooting information.
8.6.2 Low Outlet Pressure Alarm –
Occurs when the Outlet Pressure
(OUTP) drops below the alarm
set point for more than one (1)
minute.
(Default setting is 2.0 PSI for Standard models / 0.30 PSI for LP models)
See section 13.7 for troubleshooting information.
8.6.3 High Humidity Alarm –
Occurs when the Humidity level
rises above the alarm set point
for more than one (1) minute.
(Default setting is 10.0%)
If this alarm is present for one (1) minute or more, the air Dryer will go into
SHUTDOWN mode to prevent saturated air from being delivered to the
supply line.
See section 13.9 for troubleshooting information.
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8.6.4 High Cabinet Temperature Alarm Occurs when the temperature in
the cabinet rises above 120°F for
more than ten (10) seconds.
If this alarm is present for three (3) minutes or more, the Compressor will
SHUTDOWN to protect against damage due to overheating. Once the
temperature lowers to 112°F the Compressor will re-start.
See section 13.12 for troubleshooting information.
8.6.5 High Compressor Last Run Time Alarm –
Occurs when the compressor
takes longer to pressurize the air
tank than the set point for the
alarm. (Default setting is 3:00
minutes)
See section 13.17 for troubleshooting information.
8.6.6 Compressor Total Hour Alarm –
Occurs when the compressor has
reached an 8,000 hour
maintenance interval. Perform
the required maintenance.
See section 10.3 for maintenance information.
8.6.7 High Flow Rate Alarm –
Occurs when the Flow Rate
(FLOW) rises above the alarm
set point for more than one (1)
minute. (Default setting is 500 SCFD)
See section 13.11 for troubleshooting information.
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8.7 Adjusting & Resetting Dryer Set Points
Dryer Set Points are simply limits programmed for a specific reading. Once this limit
is reached (or exceeded) this results in an alarm for that reading. Each of these set
points is factory programmed with a default value based on typical usage of the air
Dryer. Many of the set points for Dryer alarms can be modified to levels more
closely based upon your specific application.
NOTE: Reference Appendix Section 14.2 for Limits and Defaults.

Press the Up () Arrow Button to access the Set Point Adjust screens.

Press the Up () & Down () Arrow Buttons to navigate through the available
Set Point Adjust screens.

To change a specific Set Point:
8.7.1 High Flow Rate Alarm Set Point (default setting is 500 SCFD) –
8.7.1.1 Press the Right ()
Arrow Button to access the
Change Value Screen.
8.7.1.2 Press the Right () &
Left () Arrow Buttons to
move the underscore
beneath the digit to change.
8.7.1.3 Press the Up () & Down () Arrow Buttons to change the value of
the selected digit.
8.7.1.4 Press the Right () Arrow Button until the underscore disappears.
8.7.1.5 Press the Right ()
Arrow Button until the
underscore appears under
the correct setting (YES or
NO).
8.7.1.6 Press the Up () Arrow to confirm. This will lock in the new setting
value.
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8.7.2 High Outlet Pressure Alarm Set Point
(default setting is 10.0 PSI for Standard models / 7.50 PSI for LP models) –
8.7.2.1 Press the Right ()
Arrow Button to access the
Change Value Screen.
8.7.2.2 Press the Right () &
Left () Arrow Buttons to
move the underscore
beneath the digit to change.
8.7.2.3 Press the Up () & Down () Arrow Buttons to change the value of
the selected digit.
8.7.2.4 Press the Right () Arrow Button until the underscore disappears.
8.7.2.5 Press the Right ()
Arrow Button until the
underscore appears under
the correct setting (YES or
NO).
8.7.2.6 Press the Up () Arrow to confirm. This will lock in the new setting
value.
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8.7.3 Low Outlet Pressure Alarm Set Point
(default setting is 2.0 PSI for Standard models / 0.30 PSI for LP models) –
8.7.3.1 Press the Right ()
Arrow Button to access the
Change Value Screen.
8.7.3.2 Press the Right () &
Left () Arrow Buttons to
move the underscore
beneath the digit to change.
8.7.3.3 Press the Up () & Down () Arrow Buttons to change the value of
the selected digit.
8.7.3.4 Press the Right () Arrow Button until the underscore disappears.
8.7.3.5 Press the Right ()
Arrow Button until the
underscore appears under
the correct setting (YES or
NO).
8.7.3.6 Press the Up () Arrow to confirm. This will lock in the new setting
value.
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8.7.4 High Humidity Alarm Set Point (default setting is 10.0%) –
8.7.4.1 Press the Right ()
Arrow Button to access the
Change Value Screen.
8.7.4.2 Press the Right () &
Left () Arrow Buttons to
move the underscore
beneath the digit to change.
8.7.4.3 Press the Up () & Down () Arrow Buttons to change the value of
the selected digit.
8.7.4.4 Press the Right () Arrow Button until the underscore disappears.
8.7.4.5 Press the Right ()
Arrow Button until the
underscore appears under
the correct setting (YES or
NO).
8.7.4.6 Press the Up () Arrow to confirm. This will lock in the new setting
value.
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8.7.5 High Compressor Last Run Time Alarm Set Point (default setting is
3:00 minutes) –
8.7.5.1 Press the Right ()
Arrow Button to access the
Change Value Screen.
8.7.5.2 Press the Right () &
Left () Arrow Buttons to
move the underscore
beneath the digit to change.
8.7.5.3 Press the Up () & Down () Arrow Buttons to change the value of
the selected digit.
8.7.5.4 Press the Right () Arrow Button until the underscore disappears.
8.7.5.5 Press the Right ()
Arrow Button until the
underscore appears under
the correct setting (YES or
NO).
8.7.5.6 Press the Up () Arrow to confirm. This will lock in the new setting
value.
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8.7.6 Compressor Total Time Reset –
The Total Time (TTL TIME) is the time the compressor runs measured in
hours since startup or the last time the compressor time counter was reset.
The dryer will display an alarm when this counter has reached 8,000 hours,
signaling is it time for maintenance.
8.7.6.1 Press and Hold the Left
() & Right () Arrow
Buttons to access the
Change Value Screen.
8.7.6.2 Press the Right () &
Left () Arrow Buttons to
move the underscore
beneath the digits to
change to zero (0).
8.7.6.3 Press the Up () & Down () Arrow Buttons to change the value of
the selected digit.
8.7.6.4 Press the Right () Arrow Button until the confirmation screen
appears.
8.7.6.5 Press the Right ()
Arrow Button until the
underscore appears under
the correct setting (YES or
NO).
8.7.6.6 Press the Up () Arrow to confirm. This will lock in the new setting
value.
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8.7.7 Reset to Factory Values –
8.7.7.1 Press the Left () &
Right () Arrow Buttons at
the same time.
8.7.7.2 Press the Right ()
Arrow Button until the
underscore appears under
the correct setting (YES or
NO).
8.7.7.3 Press the Up () Arrow to confirm. This will lock in the new setting
value.
8.7.8 Alarm Delays Set Point The Alarm Delay allows the Dryer to come out of the alarm condition on its
own without signaling an alarm.
ON (default) – waits one (1) minute before signaling alarms
OFF – signals alarms immediately
8.7.8.1 Press the Right ()
Arrow Button to change the
value.
8.7.8.2 Press the Right ()
Arrow Button until the
underscore appears under
the correct setting (OFF or
ON).
8.7.8.3 Press the Up () Arrow to confirm. This will lock in the new setting
value.
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8.7.9 Startup Delay Set Point (default setting is 0 sec) –
The Startup Delay keeps the compressor from turning on immediately when
the dryer is powered on for up to 10 seconds. This allows multiple dryers to
power on in separate intervals in case of a power loss.
8.7.9.1 Press the Right ()
Arrow Button to access the
Change Value Screen.
8.7.9.2 Press the Right () &
Left () Arrow Buttons to
move the underscore
beneath the digit to change.
8.7.9.3 Press the Up () & Down () Arrow Buttons to change the value of
the selected digit.
8.7.9.4 Press the Right () Arrow Button until the underscore disappears.
8.7.9.5 Press the Right ()
Arrow Button until the
underscore appears under
the correct setting (YES or
NO).
8.7.9.6 Press the Up () Arrow to confirm. This will lock in the new setting
value.
8.7.10 Pressure Gauge –
This is an information screen
only and will not time-out,
returning to the cycling
information screens. It also
masks air Dryer alarms while in use. This screen can be used during air
Dryer troubleshooting.
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8.8 Open Panel
8.8.1 Open panel latches and
remove the front panel.
8.9 Setting the System Pressure
With Compressor running:
8.9.1 Open Panel (see section 8.8 ).
8.9.2 Pull the Capacity Control
Valve knob out.
8.9.3 Turn the knob until the
reading on the Pressure
Gauge is 50 PSI.
8.9.4 Push the knob in to lock.
8.9.5 Close Panel.
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8.10 Setting the Static Pressure
8.10.1 Open Panel (see section 8.8 ).
8.10.2 Pull the Static Pressure
Regulator knob out.
8.10.3 Turn knob until the
reading on the Pressure
Gauge is17 PSI.
8.10.4 Push knob in to lock.
8.10.5 Close Panel.
8.11 Setting the Outlet Pressure
8.11.1 Open Panel (see section 8.8 ).
8.11.2 Pull the Outlet Pressure
Regulator knob out (or loosen
the retaining nut – LP
Models).
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8.11.3 Turn knob until Outlet
Pressure (OUTP) reading is
at the desired setting.
8.11.4 Push knob in to lock (or
tighten the retaining nut – LP
Models).
8.11.5 Close Panel.
8.12 Connecting to Common Alarm Terminals
8.12.1 Open Panel (see section 8.8 ).
8.12.2 Locate the external
Common Alarm pins on the
Control Board.
8.12.3 Wire the Common Alarm
wire pair to the Control
Board as required:

COMMON & NO for
CLOSE ON ALARM
operation.

NC & COMMON for
OPEN ON ALARM
operation.
8.12.4 Close Panel.
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8.13 Connecting to Power Fail Alarm Terminals
8.13.1 Open Panel (see section 8.8 ).
8.13.2 Locate the external Power
Fail pins on the Control
Board.
8.13.3 Wire the Power Fail
Alarm wire pair to the
Control Board as required:

PWR FAIL & NO for
CLOSE ON ALARM
operation.

NC & PWR FAIL for
OPEN ON ALARM operation
8.13.4 Close Panel.
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8.14 Connecting via Web Browser
If the Air Dryer IS connected to an IP network:

The Air Dryer must be configured with a valid IP Address, Subnet Mask, and
Gateway Address for the network.

An IP cable is connecting the Air Dryer to the network.

Use a computer that is on the same network as the air Dryer.

Use Internet Explorer (6.0 or newer) or Mozilla Firefox Web Browser.
If the Air Dryer IS NOT connected to an IP network and has not been
configured with IP information:

Use the default IP Address (192.168.1.100) of the air dryer to connect.

Use an IP Cable (may require Cross-over cable) plugged directly into a
Laptop/PC and the other end plugged into the UTP Port on the control board
of the Air Dryer.

Configure the network card on the Laptop/PC to use the IP Address
192.168.1.101. This will make the Laptop/PC compatible with the Air Dryer.

Use Internet Explorer (6.0 or newer) or Mozilla Firefox Web Browser.
8.14.1 Type the IP Address of the P550W Series air Dryer in the Address text
box of the web browser.
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The Web Browser connection offers five (5) screens to the user:

Status Screen - Displays the readings and alarms monitored in the
P550W Series Air Dryer. Provides remote ALARM RESET.

Config Screen - All configurations of Set Points, Setups, and
Keyword can be made in this screen.

Event Screen - Displays all events such as alarms, changes made, and
alarm resets registered by the P550W Series Air Dryer. This screen is
informational only.

Alarm Screen - Displays all the Alarms registered by the P550W
Series Air Dryer. This screen is informational only.

Firmware Screen – Allows the user to upload any software updates or
upgrades to the Air Dryer.
8.14.2 Click on the Menu Bar selection to access a specific screen.
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8.15 Using the Status Screen
Displays the readings and alarms monitored in the P550W Series Air Dryer.
Provides remote ALARM RESET.

Readings are displayed in BLACK unless an alarm is present.

Alarms are displayed in RED next to the parameter in alarm.

Alarm Status will display Alarm if any alarms are present.

Keyword validation is required for ALARM RESET and RESET TOTAL
RUN TIME.
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8.15.1 Resetting an Alarm
8.15.1.1 Click on the ALARM RESET Button to remotely reset Air Dryer
alarms displayed on Status Screen.
8.15.1.2 Enter Keyword (default is 123456)
8.15.1.3 Click on SUBMIT Button when done.
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8.15.2 Resetting Compressor Total Run Time
8.15.2.1 Click on the RESET TOTAL RUN TIME Button to remotely reset
Compressor Total Run Time displayed on Status Screen.
8.15.2.2 Enter Keyword (default is 123456)
8.15.2.3 Click on SUBMIT Button when done.
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8.16 Using the Config Screen
All configuration of Set Points, Setups, and Keyword can be made in this screen.
NOTE: Reference Appendix section 14.2 for Limits, Defaults, and Formats.

Values in BLUE represent the current setting.

The ACCEPT Button is used to change values.

The CHANGE KEYWORD Button allows you to configure a new Keyword.

Keyword validation is required for the following:
o Changing a Set Point value
o Changing the Keyword
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8.16.1 Changing a Set Point or Setup value:
8.16.1.1 Click on the value to change.
8.16.1.2 Type in the new value.
8.16.1.3 Click the ACCEPT Button when done.
8.16.1.4 Enter Keyword (default is 123456)
8.16.1.5 Click on SUBMIT Button when done. This will lock in the new
setting value.
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8.16.2 Changing the Keyword
8.16.2.1 Click on CHANGE KEYWORD Button to change the keyword.
8.16.2.2 Type the Old Keyword.
8.16.2.3 Type the New Keyword.
8.16.2.4 Type the Confirm New Keyword.
8.16.2.5 Click on SUBMIT Button to confirm. This will lock in the new
setting value.
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8.17 Using the Event Screen
Displays all events such as alarms, changes made, and alarm resets registered by
the P550W Series Air Dryers. This screen is informational only.

Click on the column headings to sort data according to that column.

Click the Arrow Buttons to navigate through all the event log pages.
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8.18 Using the Alarm Screen
Displays all the Alarms registered by the P550W Series Air Dryers. This screen is
informational only.

Click on the column headings to sort data according to that column.

Click the Arrow Buttons to navigate through all the event log pages.
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8.19 Using the Firmware Screen
Displays the current firmware version and date of the P550W Series Air Dryers.

Current Version: Displays the current firmware version of the P550W Air
Dryer.

New Version File: Displays the new location and new firmware version
chosen.

The BROWSE Button allows you to locate the new firmware file.

The ACCEPT Button is used to change values.

Keyword validation is required to update firmware.
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8.19.1 Updating the Firmware:
8.19.1.1 Click on BROWSE Button to locate the firmware file.
8.19.1.2 Navigate and Select the correct .bin file. Press the OK Button.
8.19.1.3 Click the ACCEPT Button when done
8.19.1.4 Enter Keyword (default is 123456)
8.19.1.5 Click on SUBMIT Button when done. This will lock in the new
firmware version.
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8.20 Connecting via SNMP
Using SNMP to connect and communicate with the P550W Series Air Dryer is
dependant upon the specific SNMP Management software used on your network.
This software requires a SNMP Definition & Configuration File (MIB file) in order to
properly communicate with the Air Dryer. This file is named “PuregasP550W.mib”
and is located on the Mini CD included with your Air Dryer. It is necessary to import
this file into your SNMP operating software.
NOTE: Reference Appendix section 14.3 for a list of SNMP Parameters including
Limits, Defaults, and Formats.
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9. Testing Your Dryer
9.1 Safety & Warning Information
WARNING!
Extreme care should be exercised to avoid contact with live
electrical circuits. Many procedures performed during
installation, operation, testing, and maintenance of this air Dryer
require the equipment to be running, creating a situation for
potential electrical shock. It is highly recommended that you
remove all jewelry before performing any procedures.
WARNING!
Internal surfaces may be hot. Use care when coming into contact
with internal components as there is a potential for some of these
components to become hot when in operation or standby.
CAUTION!
Depressurizing the air Dryer may be necessary before performing
certain procedures. NEVER remove pressure sensing tubes from
the control board without depressurizing the air Dryer first, or
damage to the control board will occur.
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9.2 Measuring Compressor Amp Draw
WARNING!
Internal surfaces may be hot. Use care when coming into contact
with internal components as there is a potential for some these
components to become hot when in operation or standby.
With the Compressor running:
9.2.1 Open Panel (see section 8.8 ).
9.2.2 Locate wire #5 coming
directly from the compressor.
9.2.3 Use an Amp Meter to
measure the running amps.
With the compressor running, the
running amps should measure
5.0 amps or below.
9.2.4 Close Panel.
If the compressor measures over 5.0 running amps, see section 13.16 for
troubleshooting information.
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9.3 Measuring Compressor Voltage
WARNING!
Extreme care should be exercised to avoid contact with live
electrical circuits. It is highly recommended that you remove all
jewelry before performing any procedures.
9.3.1 Open Panel (see section 8.8 ).
9.3.2 Locate the relay terminal
block on the control board
inside the air Dryer.
9.3.3 Slide off clear plastic
terminal block cover.
With the Compressor running:
9.3.4 Use a Voltmeter to measure
across the board terminals
where wires #5 and #6 are
connected.
The voltage should measure
120 VAC (10%).
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With the Compressor NOT running:
9.3.5 Use a Voltmeter to measure
across the board terminals
were wires #5 and #6 are
connected.
The voltage should measure
0 VAC (10%).
9.3.6 Replace the clear plastic
terminal block cover.
9.3.7 Close Panel.
If any of the voltage measurements are different than indicated above, the Control
Board is defective and should be replaced. See sections 11.1 for part detail and
11.5 for ordering information.
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9.4 Measuring Incoming Voltage
WARNING!
Extreme care should be exercised to avoid contact with live
electrical circuits. It is highly recommended that you remove all
jewelry before performing any procedures.
9.4.1 Open Panel (see section 8.8 ).
9.4.2 Locate the Incoming
POWER connector inside
the Dryer.
9.4.3 Use a Voltmeter to measure
the voltage (inside Dryer):
9.4.3.1 Place the probes
between the Power
connector and terminal
insulation so that they
touch the metal contacts for
BLACK (BROWN) wire
and WHITE (BLUE) wire.
The voltage should measure 110 - 125 VAC for the P550W, P550WH and
P550WLP or 208 - 253 VAC for the P552W, P552WH and P552WLP.
9.4.4 Close Panel.
If the incoming voltage measures less than indicated above, it is recommended
that steps be taken at your facility to increase the power to the recommended level
of voltage.
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9.5 Measuring Voltage from AC Step-Down Transformer
WARNING!
Extreme care should be exercised to avoid contact with live
electrical circuits. It is highly recommended that you remove all
jewelry before performing any procedures.
For P552W, P552WH and P552WLP Dryers:
9.5.1 Open Panel (see section 8.8 ).
9.5.2 Locate the POWER
Switch.
9.5.3 Use a Voltmeter to measure
the voltage (inside Dryer):
9.5.3.1 Place the probes
between the Power
Switch and terminal
insulation so that they
touch the metal contacts
for BLACK (BROWN)
wire #1 and WHITE (BLUE) wire #2.
9.5.4 Close Panel.
The voltage should measure 110 - 125 VAC.
If the voltage at the power switch measures less than 110 VAC and the incoming
power voltage is within specifications, it is recommended that the AC transformer
is replaced. See section 11.5 for ordering information
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9.6 Testing Consistent Heatless Dryer Cycling
WARNING!
Internal surfaces may be hot. Use care when coming into contact
with internal components as there is a potential for some of these
components to become hot when in operation or standby.
With the Compressor running:
9.6.1 Open Panel (see section 8.8 ).
9.6.2 Place a piece of insulating
material over the compressor
for this test (i.e. piece of
cardboard).
9.6.3 Locate the heatless Dryer
purge solenoids inside the air
Dryer
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9.6.4 Place your hand beneath the
purge solenoids to feel for
purging air. Air should:

Purge from Tower 1 side

Purge from Tower 2 side
30 Seconds later

Purge from Tower 1 side
30 Seconds later

…and so on.
9.6.5 Remove insulating material
from top of the compressor.
9.6.6 Close Panel.
If the Heatless Dryer is not cycling consistently as described, see section 13.13
for troubleshooting information.
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9.7 Testing Unloader Valve
With the Compressor running:
9.7.1 Locate the Unloader Valve
on the right side of the
heatless Dryer.
9.7.2 Place your hand over the
Unloader Valve to feel for air
flow.
Air should NOT flow from
this fitting continuously. Air
should only be released in a
short burst when the
compressor shuts off.
If air flows from this valve continuously the Unloader Valve is either defective
and should be replaced. See sections 11.3 for part detail and 11.5 for ordering
information.
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9.8 Measuring Heatless Dryer Solenoid Voltage
With the Compressor running:
9.8.1 Locate the Heatless Dryer
Cycle Timer.
The timer has three (3) sets of
terminals (from left-to-right):
“VALVE” – Left solenoid
“IN” – Incoming power
“VALVE” – Right solenoid
9.8.2 Use a Voltmeter to measure
the DC voltage across each
set of “VALVE” terminals.
Continue to measure for up to
45 seconds if no voltage is
initially measured.
The voltage should measure 53 Volts DC.
If the voltage does not measure 53 Volts DC, this is an indication that the Cycle
Timer is defective and should be replaced. See sections 11.3 for part detail and
11.5 for ordering information.
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9.9 Testing Air Dryer Fan
NOTE: To test the fan, the cabinet temperature must be above 90 F.
9.9.1 Place your hand outside the
Dryer to feel for air being
blown outwards.
NOTE: The fan will turn OFF when the cabinet temperature is below 80 F.
If the fan is not blowing air outwards as described:

Verify the cabinet temperature is above 90 F.

Check for loose wiring. Refer to the Wiring Diagram (section 14.1 )

Replace defective fan (see sections 11.1 for part detail and 11.5 for
ordering information).

Replace defective control board if fan does not respond properly to
temperature changes (see sections 11.1 for part detail and 11.5 for
ordering information).
9.10 Testing Compressor ON/OFF Cycling
9.10.1 When the Unit Screen
(8.5.5.1 ) appears on the
display, press the HOLD
Button on the Front Panel to
freeze that screen.
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With Compressor running:
9.10.2 Verify the compressor
shuts down when the tank
pressure (TANK) reaches
50.0 PSI.
If the tank pressure (TANK) fails
to reach 50 PSI, see section 13.15
for troubleshooting information.
With Compressor NOT running:
CAUTION: Be careful when removing Air hose. System is pressurized.
9.10.3 Depressurize air Dryer (see section 8.3.1 )
9.10.4 Verify the compressor
turns on when the tank
pressure (TANK) falls to
20.0 PSI.
9.10.5 Reconnect air hose.
If the Compressor Cycling fails either test described, it indicates a problem with
the Control Board which will need to be replaced. See sections 11.1 for part
detail and 11.5 for ordering information.
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9.11 Testing High Compressor Last Run Time Alarm
CAUTION: Be careful when removing Air hose. System is pressurized.
NOTE: For this test, allow the Display Screen to cycle through the information
screens.
9.11.1 Start timing when the compressor turns on.
9.11.2 Depressurize air Dryer (see section 8.3.1 )
This prevents the compressor from shutting down.
When the compressor runs
for 3:00 minutes (unless
adjusted to a different Set
Point by the user), a High
Compressor Last Run Time
(LAST RUN) alarm should
appear on the System Screen.
9.11.3 Reconnect air hose.
9.11.4 Press the RESET Button.
If you are unable to create a High Compressor Last Run Time (LAST RUN)
alarm as described, see section 13.18 for troubleshooting information.
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9.12 Testing Humidity Alarm and System Shutdown
CAUTION: Be careful when removing Air hose. System is pressurized.
9.12.1 Power the air Dryer OFF.
9.12.2 Depressurize air Dryer (see section 8.3.1 )
9.12.3 Unscrew and remove the
Humidity Sensor from the
Humidity Block.
9.12.4 Power the air Dryer ON.
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Allow the Humidity reading to rise
over 10.0%.
9.12.5 After three (3) minutes,
verify that a Humidity Alarm
appears and the Dryer goes
into SHUTDOWN mode.
9.12.6 Replace the Humidity
Sensor into the Humidity
Block.
9.12.7 Press the RESET Button
to clear the Humidity alarm.
If you are unable to create a Humidity / Shutdown alarm as described, see section
13.10 for troubleshooting information.
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9.13 Testing High Outlet Pressure Alarm
9.13.1 Make a note of the current
Outlet Pressure (OUTP)
reading.
9.13.2 Pull the Outlet Pressure
Regulator knob out (or loosen
the retaining nut – LP
Models).
9.13.3 Turn knob clockwise until
Outlet Pressure (OUTP)
reading climbs over 10.0 PSI
(over 7.50 PSI - LP Models).
After one (1) minute, the High Pressure Alarm should appear on the display.
9.13.4 Turn Outlet Pressure
Regulator knob counterclockwise until Outlet
Pressure (OUTP) reading
lowers to the reading
recorded in step 9.13.1
9.13.5 Push knob in to lock (or
tighten the retaining nut – LP Models).
9.13.6 Press the RESET Button.
If you are unable to create a High Outlet Pressure Alarm as described, see
section 13.6 for troubleshooting information.
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9.14 Testing Low Outlet Pressure Alarm
9.14.1 Make a note of the current
Outlet Pressure (OUTP)
reading.
9.14.2 Pull the Outlet Pressure
Regulator knob out (or loosen
the retaining nut – LP
Models).
9.14.3 Turn knob counterclockwise until Outlet
Pressure (OUTP) reading
drops below 2.0 PSI (below 0.30 PSI – LP Models).
After one (1) minute, the Low Pressure Alarm should appear on the display.
9.14.4 Turn Outlet Pressure
Regulator knob clockwise
until Outlet Pressure (OUTP)
reading rises to the reading
recorded in step 9.14.1
9.14.5 Push knob in to lock (or
tighten the retaining nut – LP Models).
9.14.6 Press the RESET Button.
If you are unable to create a Low Outlet Pressure Alarm as described, see section
13.8 for troubleshooting information.
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9.15 Testing Air Fittings & Hoses for Leaks
NOTE: This is a general procedure that can be applied to any fitting or hose that
has air pressure in it. DO NOT SOAP TEST THE HUMIDITY SENSOR
FITTING. DAMAGE TO THE SENSOR MAY OCCUR.
With Compressor NOT running:
9.15.1 Listen for any ‘hissing’ sounds which may indicate a fitting or hose air
leak.
With Compressor running:
9.15.2 Use a 1-inch paint brush to dab soapy water on the air fitting or hose
connection to be tested.
If air bubbles appear at the
connection, this indicates that
air is leaking from the
connection.
If any leaks are detected, take steps to seal them off (as necessary):

Tighten the fitting

Re-connect the hose end

Replace the fitting / hose / component
Page 73 of 99
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P550W Series Air Dryers User’s Guide
10. Maintaining Your Dryer
In order to ensure that your P550W Series Air Dryer continues to operate efficiently and
reliably, PUREGAS recommends performing the following maintenance procedures at
the specified Six Month and 8,000 Hour intervals.
It is also recommended that you print out the included Six Month Maintenance (section
10.2 ) and 8,000 Hour Maintenance (section 10.3 ) log sheets and record all completed
maintenance for historical tracking and reference purposes.
The log sheets include a Section reference column which indicates the User’s Guide
section containing the information about the specific procedure. Please refer to these
sections for detailed procedural information.
NOTE: When operating at higher ambient temperatures, it is recommended that
maintenance be performed more frequently.
NOTE: After 16,000 hours of run time, PUREGAS recommends sending in your
compressors and heatless dryers for a complete and comprehensive rebuild by our
Service Department technicians. See sections 12.1 and 12.2 for information on
services and contacting PUREGAS.
10.1 Safety & Warning Information
WARNING!
Extreme care should be exercised to avoid contact with live
electrical circuits. Many procedures performed during
installation, operation, testing, and maintenance of this air Dryer
require the equipment to be running, creating a situation for
potential electrical shock. It is highly recommended that you
remove all jewelry before performing any procedures.
Page 74 of 99
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WARNING!
Internal surfaces may be hot. Use care when coming into contact
with internal components as there is a potential for some of these
components to become hot when in operation or standby.
CAUTION!
SHUT DOWN IMMEDIATELY FOR REPAIRS if the air
compressor shows any evidence of overheating or presents
excessive noise.
CAUTION!
Depressurizing the air Dryer may be necessary before performing
certain procedures. NEVER remove pressure sensing tubes from
the Control Board without depressurizing the air Dryer first, or
damage to the Control Board will occur.
IMPORTANT!
Performing routine maintenance as outlined in the Maintaining
Your Dryer section will ensure optimal performance over the
lifecycle of your air Dryer.
IMPORTANT!
Performing procedures not described in this User’s Guide or
installing components not supplied by PUREGAS is NOT
RECOMMENDED AND MAY VOID THE WARRANTY.
IMPORTANT!
After performing any maintenance, always soap test pressure
fittings to check for air leaks. Also, check for any loose or
disconnected wiring.
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10.2 Six Month Maintenance
MODEL:
LOCATION NAME:
SERIAL NUMBER:
ADDRESS:
DATE INSTALLED:
Maintenance Interval (Months)
Procedure
Install Six Month Maintenance Kit P011798
Read & Record Flow Rate (FLOW)
Section
6
12
18
24
30
11.4










8.5.5.2
Measure & Record
9.2
Compressor Amp Draw
Measure & Record Incoming Voltage
(must be 110 - 125 VAC for P550W, P550WH and
9.4
P550WLP models and
must be 208 - 253 VAC for P552W, P552WH and
P552WLP models)
Test High & Low Outlet Pressure Alarms
9.13 &
9.14
Set System Pressure (50 PSI)
8.8





Set Static Pressure (17 PSI)
8.10





Set Outlet Pressure
8.11





Test Consistent Heatless Dryer Cycling
9.6





Test Fan
9.9





Test Compressor ON/OFF Cycling
9.10





Test High Compressor Last Run Time Alarm
9.11





Test Humidity Alarm & System Shutdown
9.12





Test Air Fittings for Leaks
9.15










Visually Inspect Inside & Outside of Unit for Loose
Wiring or Hardware
Maintenance Performed by:
Date of Maintenance:
NOTE: COPY OR PRINT THIS PAGE AND KEEP IT WITH THE AIR DRYER
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10.3 8,000 Hour Maintenance
Under typical operating conditions:
8,000 hours of run time will occur between one (1) and two (2) years of use.
This will be identified by a TTL TIME Alarm on the display.
MODEL:
LOCATION NAME:
SERIAL NUMBER:
ADDRESS:
DATE INSTALLED:
Maintenance Interval (Hours)
Procedure
Install 8,000 Hour Maintenance Kit P011673
Read & Record Flow Rate (FLOW)
Section
8,000
16,000
24,000
32,000
40,000
11.4





8.5.5.2
Measure & Record
9.2
Compressor Amp Draw
Set System Pressure (50 PSI)
8.8





Set Static Pressure (17 PSI)
8.10





Set Outlet Pressure
8.11





Test Consistent Heatless Dryer Cycling
9.6





Test Compressor ON/OFF Cycling
9.10





Test Air Fittings for Leaks
9.15





Reset TTL TIME Reading to Zero
8.7.6










Visually Inspect Inside & Outside of Unit for Loose
Wiring or Hardware
Maintenance Performed by:
Date of Maintenance:
NOTE: COPY OR PRINT THIS PAGE AND KEEP IT WITH THE AIR DRYER
Page 77 of 99
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11. Replacement Parts & Accessories
11.1 Dryer Parts
Description
Power Switch
Fan
Static Pressure Regulator
Part Number
Quantity
M038428
1
P4080
1
P010279
1
Air Tank
Control Board -
Recommend
Spare
1
Standard Pressure
P011816
Low Pressure
P011862
Heatless Dryer Assembly
1
 (1)
See section 11.3 for detail
System Pressure Gauge (0-100 PSI)
P010695
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11.2 Dryer Parts cont.
Description
Part Number
Quantity
Standard Pressure
P010279
1
Low Pressure
P012316
Recommend
Spare
Outlet Pressure Regulator -
Flow Block
Humidity Sensor
Static Pressure Gauge (0-30 PSI)
1
In Kit P011798. See section 11.4
P8345
1
Capacity Control Valve
P010492
1
Air Compressor
P011660
1
Page 79 of 99
 (1)
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11.3 Heatless Dryer Assembly Parts
Description
Part Number
Quantity
Heatless Dryer
P011738
1
Desiccant Chamber
P2004036
2
Cycle Timer
P010530F1
1
P011839
1
Unloader Valve
Solenoid Valve
Recommend
Spare
In Kit P011673. See section 11.4 for detail.
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11.4 Accessories for Your Dryer
Description
Part Number
Recommend
Spare
Six Month Maintenance Kit
Includes air intake filter, compressor
P011798
 (2)
P011673
 (1)
muffler, and humidity sensor.
8,000 Hour Maintenance Kit
Includes heatless Dryer maintenance kit
and compressor maintenance kit.
Universal Rack Mounting Kit
Includes mounting brackets and
P011674
hardware for 19” or 23” racks.
Wall Mounting Kit
Includes mounting brackets and
P011773
hardware.
Cycle Kit
P08033W
Allows multiple dryers to be cycled.
Cycle Kit Interface Kit
Page 81 of 99
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P550W Series Air Dryers User’s Guide
11.5 Ordering Parts from PUREGAS
IMPORTANT!
Instruction for the replacement of individual listed components goes
beyond the scope of this User’s Guide and will not be covered. Please
refer to the information included with the specific replacement part for
this instruction.
Once you have identified your required parts and accessories, contact the PUREGAS
Inside Sales / Service department to order:
(800) 521-5351 (option 2)
Fax – (303) 657-2205
sales@puregas.com
parts@puregas.com
Page 82 of 99
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12. Service & Repair
Only PUREGAS can offer factory direct rebuilds backed by a 6 month factory warranty.

2 week turnaround time

Estimates available upon request

Minimum service charge fee applies
12.1 Services Offered

Piston Compressor Rebuild
o Replace motor bearings, piston rod assemblies, and install a
complete compressor maintenance kit.
o Test air flow, air pressure, and electrical performance

Heatless Dryer Rebuild
o Replace desiccant, o-rings, check valves, springs, and complete
solenoid assembly
o Test proper component operation

Desiccant Tower Repack
o Clean out tower and replace desiccant, filter, and o-ring

Circuit Board Repair (Limited to current model boards only)

Complete Dryer Repair
12.2 Initiating a Service Transaction

Contact our Parts & Service Department at 1-800-521-5351 (option 3)
to obtain a Return Authorization (RA) number.

Carefully package the item(s) to be returned.

Mark the Return Authorization (RA) number on the outside of the
shipping container.

Include the main address and phone number of the individual to contact
for related inquiry and follow-up information.

Include the purchase order number.
Page 83 of 99
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13. Troubleshooting Your Dryer
13.1 Before You Call PUREGAS
PLEASE READ THIS SECTION FIRST. It is important that you use the
following sections in order to diagnose and attempt to fix the problem with your air
Dryer before placing a call to PUREGAS Technical Support.
This troubleshooting guide is intended to simplify the isolation of problems, present
possible causes, provide test procedures for verification, and suggest corrective
actions to restore the air Dryer back to normal operation. Each section begins with
the most likely cause(s) of the issue. Otherwise, they start from the simplest
possibilities and progress to more complicated ones.
This troubleshooting guide is designed to be easy to follow and very effective when
used properly. It is suggested to always start at the beginning of the specific problem
section and continue in sequence, following the procedures indicated.
13.2 Safety & Warning Information
WARNING!
For your safety, all the information in this User’s Guide must
be followed to minimize the risk of electrical shock, and prevent
property damage or personal injury.
WARNING!
Internal surfaces may be hot. Use care when coming into contact
with internal components as there is a potential for some of these
components to become hot when in operation or standby.
Page 84 of 99
P011658 – Rev. M
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P550W Series Air Dryers User’s Guide
WARNING!
Extreme care should be exercised to avoid contact with live
electrical circuits. Many procedures performed during
installation, operation, testing, and maintenance of this air Dryer
require the equipment to be running, creating a situation for
potential electrical shock. It is highly recommended that you
remove all jewelry before performing any procedures.
CAUTION!
Depressurizing the air Dryer may be necessary before performing
certain procedures. NEVER remove pressure sensing tubes from
the Control Board without depressurizing the air Dryer first, or
damage to the Control Board will occur.
CAUTION!
Do not test the Humidity Sensor with an ohm meter or apply
any DC voltage. This will render the Humidity Sensor defective.
IMPORTANT!
Performing procedures not described in this User’s Guide or
installing components not supplied by PUREGAS is NOT
RECOMMENDED AND MAY VOID THE WARRANTY.
13.3 Air Dryer Won’t Power ON
Possible Cause
POWER Switch in
OFF position
No incoming voltage to
air Dryer
Check
Verify POWER switch
is in the ON position
(section 8.4 )
Measure incoming
voltage (section 9.4 )
Page 85 of 99
Corrective Action
Turn POWER switch to
the ON position (section
8.4 )
Troubleshoot facility
power supply to air
Dryer
P011658 – Rev. M
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P550W Series Air Dryers User’s Guide
13.4 Display Screen Not Functioning
Possible Cause
Dryer experienced a
power spike
Check
Ribbon cable
disconnected
Verify ribbon cable
from the decal is
connected at the display
board
Corrective Action
Power the air Dryer
OFF for 15+ seconds.
Power the air Dryer ON.
Reconnect the ribbon
cable properly.
13.5 High Outlet Pressure Alarm
Possible Cause
Outlet Pressure set too
high
High Outlet Pressure
Alarm set point too low
Check
Verify Outlet Pressure
(OUTP) reading
(section 8.5.5.1 )
Verify High Outlet
Pressure Alarm set point
(section 8.7.2 )
Corrective Action
Adjust Outlet Pressure
Regulator (section 8.11 )
Raise High Outlet
Pressure Alarm set point
(section 8.7.2 )
13.6 Can’t Create a High Pressure Alarm
Possible Cause
Defective Outlet
Pressure Regulator
High Outlet Pressure
Alarm set point higher
than default setting
Defective Control Board
Check
Verify that the Outlet
Pressure Regulator can
be adjusted
(section 8.11 )
Verify High Outlet
Pressure Alarm set point
(section 8.7.2 )
Verify that the Outlet
Pressure (OUTP)
reading is higher than
the High Outlet Pressure
Alarm set point (above)
Page 86 of 99
Corrective Action
Replace Outlet Pressure
Regulator if unable to
adjust pressure
(section 11.2 )
Adjust Outlet Pressure
Regulator so that Outlet
Pressure (OUTP)
reading climbs over
verified set point
(section 9.13 )
Replace Control Board
(section 11.1 ) if Outlet
Pressure (OUTP)
reading is over verified
High Outlet Pressure
Alarm set point for more
than 1 minute and fails
to create an alarm.
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
13.7 Low Outlet Pressure Alarm
Possible Cause
Outlet Pressure set too
low
High Flow condition
Low Outlet Pressure
Alarm set point too high
Leak in the air system
Check
Verify Outlet Pressure
(OUTP) reading
(section 8.5.5.1 )
Verify Flow Rate
(FLOW) reading is not
higher than expected
(section 8.5.5.2 )
Verify Low Outlet
Pressure Alarm set point
(section 8.7.3 )
With no outlet flow, test
fittings and hoses for
leaks (section 9.15 )
Corrective Action
Adjust Outlet Pressure
Regulator (section 8.11 )
Troubleshoot High Flow
condition
(section 13.11 )
Lower the Low Outlet
Pressure Alarm set point
(section 8.7.3 )
Tighten any loose
connections as required
13.8 Can’t Create a Low Pressure Alarm
Possible Cause
Defective Outlet
Pressure Regulator
Low Outlet Pressure
Alarm set point lower
than default setting
Defective Control Board
Check
Verify that the Outlet
Pressure Regulator can
be adjusted
(section 8.11 )
Verify Low Outlet
Pressure Alarm set point
(section 8.7.3 )
Verify that the Outlet
Pressure (OUTP)
reading is lower than the
Low Outlet Pressure
Alarm set point (above)
Page 87 of 99
Corrective Action
Replace Outlet Pressure
Regulator if unable to
adjust pressure
(section 11.2 )
Adjust Outlet Pressure
Regulator so that Outlet
Pressure (OUTP)
reading drops below
verified set point
(section 9.14 )
Replace Control Board
(section 11.1 ) if Outlet
Pressure (OUTP)
reading is under verified
Low Outlet Pressure
Alarm set point for more
than 1 minute and fails
to create an alarm.
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
13.9 High Humidity
CAUTION!
Do not test the Humidity Sensor with an ohm meter or apply
any DC voltage. This will render the Humidity Sensor defective.
Possible Cause
Low System Pressure
Check
Verify System Pressure
(section 8.8 )
Low Flow Rate
Verify Flow Rate
(FLOW) reading is low
(section 8.5.5.2 )
High Humidity Alarm
set point too low
Verify High Humidity
Alarm set point
(section 8.7.4 )
Defective Humidity
Sensor
If Flow Rate is low,
allowing a higher alarm
set point (up to 10%)
will allow Dryer to run
within acceptable levels.
Perform the Testing
Humidity Alarm and
System Shutdown test
(section 9.12 )
Heatless Dryer not
cycling between towers
Verify consistent
Heatless Dryer cycling
(section 9.6 )
Defective Control Board
Unplug Humidity
Sensor from Control
Board (see section 11.1
for Board location)
Humidity reading should
drop to 0%
Page 88 of 99
Corrective Action
Adjust System Pressure
to 50 PSI, ± 2 PSI.
(section 8.8 )
Install the Tee Tube
Union and the Precision
Bleed Orifice at output
of the air Dryer
(section 6.5.16 )
Raise High Humidity
Alarm set point
(section 8.7.4 )
Over 10% not
recommended
Troubleshoot Can’t
Create a High Humidity
Alarm / Shutdown
condition
(section 13.10 )
Troubleshoot
Inconsistent Heatless
Dryer Cycling condition
(section 13.13 )
If Humidity did not drop
to 0%, replace Control
Board (section 11.1 )
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
13.10 Can’t Create a High Humidity Alarm / Shutdown
These troubleshooting steps assume that the Humidity Element is removed from
the Humidity Block during the Testing Humidity Alarm and System Shutdown
(section 9.12 ) procedures.
Possible Cause
Humidity Sensor Cable
disconnected
Defective Humidity
Sensor
Defective Control Board
Check
Verify that Humidity
Sensor cable is
connected to the Control
Board
Verify that Humidity
reading fails to climb
higher than 15% or
creates sporadic
readings
Verify that Humidity
reading is over 15% for
more than 1 minute
Corrective Action
Connect Humidity
Sensor cable
Replace Humidity
Sensor (section 11.2 )
Replace Control Board
if no alarm is created
and system does not shut
down (section 11.1 )
13.11 High Flow Rate Alarm
Possible Cause
Air leak in downstream
cable outside of Dryer
Air leak inside of Dryer
High Flow Alarm set
point too low
Check
Verify Flow Rate
(FLOW) reading is not
higher than expected
(section 8.5.5.2 )
Test fittings and hoses
for leaks (section 9.15 )
Verify High Flow Alarm
set point
(section 8.7.1 )
Corrective Action
Fix downstream
problem
Reconnect or replace
bad fitting / hose
Raise High Flow Alarm
set point (section 8.7.1 )
13.12 High Cabinet Temperature Alarm
Possible Cause
Fan Failure
Check
Verify fan is running
(section 9.9 )
High Ambient
Temperature
Verify temperature of
Dryer operating
location. Recommended
ambient temperature is
40°-85°F.
Page 89 of 99
Corrective Action
Check for loose fan
wiring (section 14.1 )
Replace defective fan
(section 11.1 )
Lower the ambient
temperature of the
Dryer’s operating
location
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
13.13 Inconsistent Heatless Dryer Cycling
Possible Cause
Defective Solenoid
Valve
Check
Measure voltage going
to the Heatless Dryer
Solenoid Valves
(section 9.8 )
Defective Cycle Timer
Measure voltage going
to the Heatless Dryer
Solenoid Valves
(section 9.8 )
Corrective Action
If 53 VDC IS present,
replace Solenoid Valves
included in the 8,000
Hour Maintenance Kit
(section 11.4 )
If 53 VDC IS NOT
present, replace the
Cycle Timer
(section 11.3 )
13.14 Compressor Doesn’t Operate
Possible Cause
Defective compressor
Check
Measure compressor
voltage
(section 9.3 )
Defective control board
Measure compressor
voltage
(section 9.3 )
System is in Shutdown
state
On the Display Panel,
verify that the system is
in SHUTDOWN state
Page 90 of 99
Corrective Action
If voltage is good,
replace compressor
(section 11.2 )
or send it in for repair
(section 12. )
If measurements are
incorrect, replace
control board (section
11.1 )
Press the RESET
Button
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
13.15 Compressor Won’t Build Pressure
Possible Cause
Low System Pressure
Check
Verify System Pressure
(section 8.8 )
Defective Unloader
Valve
Test Unloader Valve
operation (section 9.7 )
Leak in air system
If this is continuously
flowing high amounts of
air, the Unloader Valve
is defective.
Check all hoses and
fittings between
compressor and Air
Tank for air leaks
(section 9.15 )
Corrective Action
Adjust System Pressure
to 50 PSI, ± 2 PSI.
(section 8.8 )
Replace Unloader Valve
(section 11.3 )
Connect, tighten, or
replace leaking
component
13.16 Compressor Excessive AMP Draw
Possible Cause
Restriction in air line
Compressor failing
Check
Remove Discharge Hose
from compressor (hose
to the heatless Dryer)
Corrective Action
If measurement is below
the recommended amps,
trace hoses from
compressor to Unloader
Valve looking for
restrictions or kinks
Re-measure Compressor
AMP Draw
(section 9.2 )
Remove Discharge Hose If measurement is still
from compressor (hose
above the recommended
to the heatless Dryer)
amps, replace the
compressor
Re-measure Compressor (section 11.2 )
AMP Draw
or send it in for repair
(section 9.2 )
(section 12. )
Page 91 of 99
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
13.17 High Compressor Last Run Time Alarm
Possible Cause
Low System Pressure
Check
Verify System Pressure
(section 8.8 )
High Flow condition
Verify Flow Rate
(FLOW) reading is not
higher than expected
(section 8.5.5.2 )
Test Unloader Valve
operation (section 9.7 )
If this is continuously
flowing high amounts of
air, the Unloader Valve
is defective.
Verify consistent
Heatless Dryer cycling
(section 9.6 )
If either side is
continuously flowing
high amounts of air, the
Solenoid Valve is
defective.
Measure voltages at
control board
(section 9.3 )
Defective Unloader
Valve
Defective Heatless
Dryer Solenoid Valve
Defective control board
Corrective Action
Adjust System Pressure
to 50 PSI, ± 2 PSI.
(section 8.8 )
Troubleshoot High Flow
condition
(section 13.11 )
Replace Unloader Valve
(section 11.3 )
Replace Solenoid
Valves included in the
8,000 Hour Maintenance
Kit (section 11.4 )
If measurements are
incorrect, replace
control board (section
11.1 )
13.18 Can’t Create a High Compressor Last Run Time Alarm
Possible Cause
High Compressor Last
Run Time Alarm set
point higher that the
default of 3:00 minutes
Defective Control Board
Check
Verify High Compressor
Last Run Time Alarm
set point (section 8.7.5 )
Verify that the
compressor has run
longer than the verified
High Compressor Last
Run Time Alarm set
point (above)
Page 92 of 99
Corrective Action
Allow the compressor to
run longer than the
verified set point
(section 9.11 )
Replace Control Board
(section 11.1 ) if the
compressor runs longer
than the verified High
Compressor Last Run
Time Alarm set point by
1 minute or more and
fails to create an alarm.
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
13.19 Compressor Rapid ON/OFF Cycling
Possible Cause
Defective control board
Check
Measure voltages at
control board
(section 9.3 )
Corrective Action
If measurements are
incorrect, replace
control board (section
11.1 )
13.20 Contacting PUREGAS Technical Support
Please read the Before You Call PUREGAS section (13.1 )
Once you have exhausted all of the potential problems and solutions covered in the
Troubleshooting Your Dryer section, and you still require further assistance to correct
a problem, contact PUREGAS Technical Support:
(800) 521-5351 (option 1)
Have the following information available:
Trouble Ticket # (if following-up on a previous call):
Phone #:
Technician Name:
Model #:
Serial #:
Company Name:
Location Name:
City:
State:
Page 93 of 99
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
14. Appendix
14.1 Wiring Diagram
Page 94 of 99
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
14.2 Set Point Limits and Defaults
14.2.1 System Adjustments
Default
Value
Unit of
Measurement
System Pressure
50
PSI
Static Pressure
17
PSI
Description
Minimum
Value
Maximum
Value
Outlet Pressure
(LP UNITS)
2.0
(0.30)
15.0
(7.50)
Alarm Delay
OFF
ON
ON
Startup Delay
0
10
0
PSI
Seconds
14.2.2 Alarm Set Points
Minimum
Value
Maximum
Value
Default
Value
Unit of
Measurement
0
900
500
SCFD
High Outlet Pressure
Alarm (LP UNITS)
Low Outlet Pressure
Alarm (LP UNITS)
0.6
(0.31)
0.5
(0.30)
20.0
(7.50)
19.9
(7.49)
10.0
(7.50)
2.0
(0.30)
High Humidity Alarm
3
15
10
%
2:00
5:00
3:00
Minutes
120
Deg F
8000
Hours
Default
Value
Unit of
Measurement
Description
High Flow Alarm
High Compressor Last
Run Time Alarm
High Cabinet
Temperature Alarm
Compressor Total Run
Time Alarm
Shutdown
PSI
PSI
YES
YES
14.2.3 System Operations
Description
ON Value
OFF Value
Compressor
20.0
50.0
PSI
90
80
Deg F
Fan
Page 95 of 99
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
14.3 SNMP Parameters
Device Configuration Information
Device ID
Device Model
Device Firmware Version
Current Date/Time
IP Address
Subnet Mask
Gateway Address
SNMP Trap Server Address
Alphanumeric (Defined by Customer)
Alphanumeric (Factory Preset)
Numeric (Factory Preset)
Numeric (mm/dd/yy hh:mm)
Numeric (xxx.xxx.xxx.xxx)
Numeric (xxx.xxx.xxx.xxx)
Numeric (xxx.xxx.xxx.xxx)
Numeric (xxx.xxx.xxx.xxx)
Status Readings (Read-Only)
Outlet Pressure Reading
Tank Pressure Reading
Humidity Reading
Flow Reading
Cabinet Temperature Reading
Compressor Total Run Time Reading
Compressor Last Run Time Reading
System Status
Compressor Status
Fan Status
Heater Status (Outdoor Unit Only)
Numeric (PSI)
Numeric (PSI)
Numeric (%)
Numeric (SCFD)
Numeric (DEG F)
Numeric (Hours)
Numeric (Seconds)
ON / SHUTDOWN
ON / OFF
ON / OFF
ON / OFF
Alarm Readings (Read-Only)
High Flow Alarm
High Outlet Pressure Alarm
Low Outlet Pressure Alarm
High Humidity Alarm
High Cabinet Temperature Alarm
High Compressor Last Run Time Alarm
Maintenance Required Alarm
Total Alarm
OK / Alarm
OK / Alarm
OK / Alarm
OK / Alarm
OK / Alarm
OK / Alarm
OK / Alarm
OK / Alarm
Configuration Settings (Read-Write)
High Flow Alarm Threshold
High Outlet Pressure Alarm Threshold
Low Outlet Pressure Alarm Threshold
High Humidity Alarm Threshold
High Compressor Last Run Time Alarm Threshold
Reset Compressor Total Run Time Reading
Start Up Delay
Alarm Delay
Numeric (SCFD)
Numeric (PSI)
Numeric (PSI)
Numeric (%)
Numeric (Seconds)
Numeric (Hours)
Numeric (Seconds)
ON / OFF
Alarm Traps Sent to SNMP Server
High Flow
High Outlet Pressure
Low Outlet Pressure
High Humidity
High Cabinet Temperature
High Compressor Last Run Time
Maintenance Required
Total Alarm
Page 96 of 99
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
15. Limited Warranty Agreement
PUREGAS products carry a one (1) year warranty against defective workmanship and
material. This period starts at date of shipment. Not included are the components subject
to normal replacement during a year’s operating time.
No claims for labor in replacing defective parts or for consequential damages will be
allowed. Replacement parts will be invoiced in the regular way, with invoices subject to
adjustment after the parts claimed defective are examined at our factory. In addition, no
material or parts will be accepted at our factory for in-warranty repairs or credit without
previous authorization from PUREGAS.
Responsibility for damages incurred in transit will be borne by the user and the user in
turn should file any damage claim against the carrier. All warranty items are F.O.B.
Broomfield, Colorado. Freight charges are the responsibility of the user.
This warranty shall not apply to any PUREGAS product which shall have been repaired
or altered in any way by anyone other than PUREGAS or authorized personnel so as to
affect, in our judgment, its proper functioning or reliability, neither will it apply to any
product which has been subject to misuse, negligence, or accident. The installation of
unauthorized non PUREGAS parts will void the warranty on those PUREGAS products.
Registration Reminder
If you haven’t already done so, please take a moment to register your PUREGAS P550W
Series Air Dryer. Registering is necessary to activate this Limited Warranty on your
product. Once you register, you are eligible to receive free technical support, as well as
updates concerning your PUREGAS products.
See Section 7. for details on Registering Your Dryer.
Page 97 of 99
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
16. Contacting PUREGAS
16.1 General
PUREGAS, LLC
226A Commerce Street
Broomfield, Colorado 80020
(800) 521-5351
(303) 427-3700
Fax – (303) 657-2233
info@puregas.com
www.puregas.com
16.2 Sales
(800) 521-5351 (option 2)
Fax – (303) 657-2205
sales@puregas.com
parts@puregas.com
16.3 Service
(800) 521-5351 (option 3)
Fax – (303) 657-2205
16.4 Technical Support
(800) 521-5351 (option 1)
DON’T FORGET TO REGISTER YOUR DRYER!
See Section 7. for details on Registering Your Dryer.
Page 98 of 99
P011658 – Rev. M
PUREGAS, LLC
P550W Series Air Dryers User’s Guide
17. Notes
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Page 99 of 99
P011658 – Rev. M
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