RFS BD550W Series User manual

100518833 – Rev. B
BD550W Series Air Dryers
User’s Guide
Models covered:
BD550W BD550WLP BD552W BD552WLP

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 3 of 104 100518833 – Rev. B
1. Welcome & Congratulations
Congratulations on your purchase of a new RFS BD550W Series Air Dryer! We here at
RFS 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 RFS 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 RFS products, please visit us on the web at:
www.rfsworld.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 RFS BD550W Series Air Dryers. Models covered include
BD550W, BD550WLP, BD552W, and BD552WLP. 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.

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 4 of 104 100518833 – Rev. B
3. Table of Contents
1. Welcome & Congratulations .......................3
2. Introduction..................................................3
3. Table of Contents..........................................4
4. Safety & Warning Information...................6
5. Overview & Specifications...........................8
5.1 Product Description.................................8
5.2 Key Features............................................8
5.3 BD550W Series Air Dryer Models..........8
5.4 Technical Specifications..........................9
5.5 Dryer Function Overview......................10
6. Installing Your Dryer.................................11
6.1 Safety & Warning Information..............11
6.2 Before You Begin..................................12
6.3 Included Contents..................................13
6.4 Required Tools and Materials................13
6.5 Installation Steps....................................14
6.6 Installation Checklist.............................22
7. Registering Your Dryer..............................23
8. Operating Your Dryer ...............................24
8.1 Safety & Warning Information..............24
8.2 Depressurizing the Dryer.......................25
8.3 Powering the Dryer ON & OFF.............25
8.4 Using the Front Panel Display...............26
8.5 Identifying Dryer Alarms ......................28
8.6 Adjusting & Resetting Dryer Set Points 30
8.7 Open Panel.............................................42
8.8 Setting the System Pressure...................42
8.9 Setting the Static Pressure .....................43
8.10 Setting the Outlet Pressure...................43
8.11 Connecting to Common Alarm
Terminals.....................................................44
8.12 Connecting to Power Fail Alarm
Terminals.....................................................45
8.13 Connecting via Web Browser..............46
8.14 Using the Status Screen .......................48
8.15 Using the Config Screen......................51
8.16 Using the Event Screen........................54
8.17 Using the Alarm Screen.......................55
8.18 Using the Firmware Screen..................56
8.19 Connecting via SNMP.........................58
9. Testing Your Dryer ....................................59
9.1 Safety & Warning Information..............59
9.2 Measuring Compressor Amp Draw .......60
9.3 Measuring Compressor Voltage ............61
9.4 Measuring Incoming Voltage ................63
9.5 Testing Consistent Heatless Dryer
Cycling.........................................................64
9.6 Testing Unloader Valve.........................66
9.7 Measuring Heatless Dryer Solenoid
Voltage.........................................................67
9.8 Testing Air Dryer Fan............................68
9.9 Testing Compressor ON/OFF Cycling ..69
9.10 Testing High Compressor Last Run
Time Alarm..................................................71
9.11 Testing Humidity Alarm and System
Shutdown.....................................................72
9.12 Testing High Outlet Pressure Alarm....74
9.13 Testing Low Outlet Pressure Alarm.....75
9.14 Testing Air Fittings & Hoses for Leaks
.....................................................................76
10. Maintaining Your Dryer..........................77
10.1 Safety & Warning Information............78
10.2 Six Month Maintenance.......................80

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
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10.3 8,000 Hour Maintenance .....................81
11. Replacement Parts & Accessories...........82
11.1 Dryer Parts...........................................82
11.2 Dryer Parts cont...................................83
11.3 Dryer Parts Cont. (Circuit Board
Selection).....................................................84
11.4 Dryer Parts Cont. (Humidity Sensor
Selection).....................................................84
11.5 Heatless Dryer Assembly Parts............85
11.6 Accessories for Your Dryer.................86
11.7 Ordering Parts from ALTEC AIR .......87
12. Service & Repair.......................................88
12.3 Services Offered ..................................88
12.4 Initiating a Service Transaction...........88
13. Troubleshooting Your Dryer...................89
13.3 Before You Call ALTEC AIR.............89
13.4 Safety & Warning Information............89
13.5 Air Dryer Won’t Power ON.................90
13.6 Display Screen Not Functioning..........91
13.7 High Outlet Pressure Alarm.................91
13.8 Can’t Create a High-Pressure Alarm ...91
13.9 Low Outlet Pressure Alarm .................92
13.10 Can’t Create a Low-Pressure Alarm..92
13.11 High Humidity...................................93
13.12 Can’t Create a High Humidity Alarm /
Shutdown.....................................................94
13.13 High Flow Rate Alarm.......................94
13.14 High Cabinet Temperature Alarm......94
13.15 Inconsistent Heatless Dryer Cycling..95
13.16 Compressor Doesn’t Operate.............95
13.17 Compressor Won’t Build Pressure.....95
13.18 Compressor Excessive AMP Draw....96
13.19 High Compressor Last Run Time
Alarm...........................................................96
13.20 Can’t Create a High Compressor Last
Run Time Alarm..........................................97
13.21 Compressor Rapid ON/OFF Cycling.97
13.22 Contacting ALTEC AIR Technical
Support.........................................................98
14. Appendix ...................................................99
14.3 Wiring Diagram...................................99
14.4 Set Point Limits and Defaults ............100
14.5 SNMP Parameters..............................101
15. Limited Warranty Agreement...............102
Registration Reminder...............................102
16. Contacting RFS.......................................103
16.1 General / Sales...................................103
16.2 Service ...............................................103
16.3 Technical Support..............................103
17. Notes.........................................................104

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 6 of 104 100518833 – Rev. B
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.

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 7 of 104 100518833 – Rev. B
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 procedures not described in this User’s Guide or installing
components not supplied by RFS is NOT RECOMMENDED AND
MAY VOID THE WARRANTY.
IMPORTANT!
Performing routine maintenance as outlined in the Maintaining Your
Dryer section will ensure optimal performance over the lifecycle of
your air Dryer.
CAUTION!
Incoming power to Dryer must be:
15-amp service recommended
110 - 125 VAC, 50/60 Hz for BD550W models
208 - 253 VAC, 50/60 Hz, 1 Phase for BD552W models
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.

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 8 of 104 100518833 – Rev. B
5. Overview & Specifications
5.1 Product Description
The BD550W Series Air Dryers from RFS are designed to intake wet ambient air and
remove the moisture for delivery to applications requiring a constant, on-demand
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 BD550W 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 BD550W Series Air Dryer Models
Model Description
BD550W Single Pressure Outlet, 110 - 125 VAC, 2 - 15 PSI (13.8-103.4 KPa)
BD550WLP Low Pressure, Single Pressure Outlet, 110 - 125 VAC, 0.30 - 7.50 PSI
(2
-
52.7 KPa)
BD552W Single Pressure Outlet, 208 - 253 VAC, 2 - 15 PSI (13.8-103.4 KPa)
BD552WLP Low Pressure, Single Pressure Outlet, 208 - 253 VAC, 0.30 - 7.50 PSI

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 9 of 104 100518833 – Rev. B
5.4 Technical Specifications
BD550W
BD550WLP BD552W BD552WLP
Output
Capacity Normal: Up to 350 SCFD (9.9 SCMD) continuous
Maximum: 550 SCFD (15.6 SCMD) emergency
Power
Requirements
110 - 125 VAC,
50 / 60 Hz, 7.0 Amps 208 - 253 VAC, 1 Phase, 50 / 60 Hz, 3.5 Amps
Outlet
Pressure
Range
2 - 15 PSI
(13.8-103.4 KPa) 0.3 - 7.5 PSI (2-52.7 KPa) 2 - 15 PSI (13.8-103.4 KPa) 0.3 - 7.5 PSI (2-52.7 KPa)
Outlet Air
Humidity
Less than 2% RH
Compressor
Type
Two-cylinder, 1/2 HP, oil-less type
Drying
Method
Heatless Desiccant
Operating
Temperature
Range
40to 85F (optimal)
(4.4- 30C)
Noise Level
51 dBA at 3’ (1m), 48 dBA at 10’ (3m)
Alarms
Standard alarms – complete readings of all critical measurement points,
individual alarm indication display,
including SNMP communication
Outlet
Connections
3/8” O.D. tube fitting
Dimensions
12” D x 17.25” W x 27” H
(
30
.5
cm D x
43.815cm W x 68.6cm H
)
Net Weight
74 lbs. (33.6 Kg)

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 10 of 104 100518833 – Rev. B
5.5 Dryer Function Overview
# Component Description
1
Compressor
Compresses drawn in ambient air.
2
Heatless Dryer
Removes moisture from compressed air.
3
Unloader Valve
Relieves excess C
ompressor head pressure.
4 Capacity Control Valve Regulates System Pressure and prevents air from
bleeding back through the
H
eatless
Dryer
.
5
Humidity Sensor
Measures the
H
umidity of the compressed air.
6
Air Tank
Stores dry compressed air.
7 Static Pressure Regulator Regulates the Static Pressure 17 PSI (117 kPa).
Maintains constant pressure on the Flow Block
for accurate
Flow
measuring.
8
Flow Block
Measures the Fl
ow of compressed air.
9
Outlet Pressure Regulator
Regulates the O
utlet
P
res
sure.
10 Pressure Outlet Outputs the pressure set by the Outlet Pressure
Regulator.

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 11 of 104 100518833 – Rev. B
6. Installing Your Dryer
6.1 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!
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
110 - 125 VAC, 50/60 Hz for BD550W models
208 - 253 VAC, 50/60 Hz, 1 Phase for BD552W models

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 12 of 104 100518833 – Rev. B
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° to 85°F (4.4° and 30°C).
NOTE: Higher temperatures will decrease component lifespan.
6.2.3.3 Meets the following power requirements:
110 - 125 VAC for BD550W and BD550WLP models
208 - 253 VAC, 1 Phase for BD552W and BD552WLP models
All models require 50/60 Hz and minimum 15-amp service
6.2.4 Notify the alarm center of the installation and potential for alarms during
the process (as necessary).
IMPORTANT!
Performing procedures not described in this User’s Guide or
installing components not supplied by RFS is NOT
RECOMMENDED AND MAY VOID THE WARRANTY.

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 13 of 104 100518833 – Rev. B
6.3 Included Contents
(1) BD550W Series Air Dryer
(1) Installation Guide (not shown)
Package located inside the Dryer:
(1) 120 VAC Power Cord (BD550W, BD550WLP)
(1) 220 VAC Power Cord (BD552W, BD552WLP)
(1) Tee Tube Union
(1) Precision Bleed Orifice Fitting
(1) User’s Guide (not shown)
6.4 Required Tools and Materials
Medium adjustable wrench
Box Cutter
Cup of soapy water
1-inch paint brush
(recommended)

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 14 of 104 100518833 – Rev. B
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 locking 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.

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 15 of 104 100518833 – Rev. B
6.5.4 Remove the ship-loose
contents package.
For SINGLE Outlet dryers:
6.5.5 Remove the Plug from the Outlet Port by pressing the ferrule down then
pulling the plug upward.
6.5.6 Install the Plug into the
included Precision Bleed
Orifice Fitting and then into
the dryer Outlet Port.
For 4-Port Outlet dryers:
6.5.7 Remove four (4) Outlet Port plugs.
6.5.8 Install four (4) Outlet Port Connectors.
6.5.9 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
11.6 )
For wall install use Wall Mounting Kit P011773 (section 11.6 )

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 16 of 104 100518833 – Rev. B
6.5.10 Verify that the Dryer is powered OFF.
6.5.11 Plug AC Power Cord to Dryer.
6.5.12 Wire or plug the power
cord into:
110 - 125 VAC power outlet for BD550Wand BD550WLP models
208 - 253 VAC, 1 phase, power outlet for BD552W and BD552WLP
models.
oLine – Black (Brown)
oNeutral – White (Blue)
oGround – Green (Green/Yellow)
6.5.13 Power the Dryer ON.
NOTE: The compressor and heatless Dryer will start, creating air flow
through the Outlet Port.

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 17 of 104 100518833 – Rev. B
6.5.14 Set the System Pressure:
With Compressor running:
6.5.14.1 Pull the Capacity
Control Valve knob out.
6.5.14.2 Turn the knob until
the reading on the
pressure gauge is 60
PSI (414 KPa).
6.5.14.3 Push the knob in to
lock.
6.5.15 Let the Dryer run until the Humidity drops below 2%. (may take up to 15
minutes). Press the RESET button if the Dryer goes into SHUTDOWN
mode.
6.5.16 Power the Dryer OFF.

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 18 of 104 100518833 – Rev. B
For SINGLE Outlet dryers:
6.5.17 Remove the Precision
Bleed Orifice fitting from the
Outlet Port by pressing the
ferrule down then pulling the
fitting upward.
NOTE: Save this fitting for use in
low flow applications.
6.5.18 Connect the air supply line(s):
For SINGLE Outlet dryers:
6.5.18.1 Connect a 3/8” air
supply line to the
Outlet Port.
For 4-Port Outlet dryers:
6.5.18.2 Connect up to four
(4) 3/8” air supply lines
to the Outlet Ports.
Open Outlet Ports as
required.

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 19 of 104 100518833 – Rev. B
NOTE: If the downstream system is pressurized prior to installation of
dryer, make reasonable attempts to install the dryer while minimizing system
depressurization. Complete depressurization may result in ambient moisture
being introduced into the system, which may require extended run time and
dryer cycling to reduce or eliminate. Ambient moisture in the downstream
system may result in high humidity alarms and shutdowns.
6.5.19 When connecting to a completely depressurized system, a high
compressor run time alarm may be triggered. This alarm will need to be
manually reset until the system is pressurized and humidity levels have
reached their defined levels.
NOTE: For all dryers with minimal FLOW:
Install the included Precision
Bleed Orifice fitting to
maintain a constant air flow.
6.5.20 Power the Dryer ON.

Radio Frequency Systems BD550W Series Air Dryers User’s Guide
Page 20 of 104 100518833 – Rev. B
6.5.21 Set the Static Pressure:
6.5.21.1 Pull Static Pressure
Regulator knob out.
Turn knob until the reading on the
pressure gauge is 17 PSI (117.2 KPa).
6.5.21.2 Push knob in to
lock.
6.5.22 Set the Outlet Pressure:
6.5.22.1 Pull the Outlet
Pressure Regulator
knob out (or loosen the
retaining nut – LP
Models).
6.5.22.2 Turn knob until
Outlet Pressure
(OUTP) reading is at
the desired setting.
6.5.22.3 Push knob in to lock (or tighten the retaining nut – LP Models)
6.5.23 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.