Altec AIR RAD-0025A-1 User manual

P018425 –Rev. A
Refrigerated Non-Cycling Series
Air Dryers
User’s Guide
Models covered:
RAD-0025 through RAD-0300 RHT-0010 through RHT-0120

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 3 of 42 P018425 –Rev. A
1. Welcome & Congratulations
Congratulations on your purchase of a new ALTEC AIR Refrigerated Non-Cycling
Series Air Dryer! We here at ALTEC AIR 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 ALTEC AIR for your Air Dryer requirements. We also hope that you
will continue to choose us for your future compressed air treatment purchases.
For information about this and other ALTEC AIR products, please visit us on the web at:
www.AltecAIR.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 ALTEC AIR Refrigerated Non-Cycling Series Air Dryers.
Models covered include RAD-0025 through RAD-0300 and RHT-0010 through RHT-
0120. 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 Air Dryer due to improper
operation or handling.

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 4 of 42 P018425 –Rev. A
3. Table of Contents
1. Welcome & Congratulations.............3
2. Introduction.....................................3
3. Table of Contents.............................4
4. Safety & Warning Information..........5
5. Overview & Specifications................7
5.1 Product Description ............................7
5.2 Key Features........................................7
5.3 Refrigerated Non-Cycling Series Air
Dryer Models ............................................8
5.4 Technical Specifications ......................9
5.5 Air Dryer Function Overview.............12
6. Installing Your Air Dryer .................14
6.1 Safety & Warning Information..........14
6.2 Before You Begin...............................15
6.3 Installation Configuration .................17
6.4 Included Contents .............................18
6.5 Required Tools and Materials ...........18
6.6 Installation Steps...............................18
7. Registering Your Air Dryer ..............21
8. Operating Your Air Dryer................22
8.1 Air Dryer Access.................................22
8.2 Refrigerant Manifold Attachment.....22
8.3 Drain Valve Operations .....................23
8.4 Hot Gas Bypass Valve Adjustments
(HGBV) ....................................................24
8.5 Thermostatic Expansion Valve
Adjustments (TXV)...................................25
9. Maintaining Your Air Dryer.............26
9.1 Safety & Warning Information ......... 26
9.2 Regular Maintenance....................... 27
10. Troubleshooting Your Air Dryer ....27
10.1 Before You Call ALTEC AIR.............. 27
10.2 Safety & Warning Information ....... 28
10.3 Air Dryer Not Performing –High
Outlet Dew Point .................................... 29
10.4 Condensate in Piping After Air Dryer
............................................................... 29
10.5 Contacting ALTEC AIR Technical
Support................................................... 30
11. Replacement Parts & Accessories .31
11.1 Air Dryer Diagram, Image, Explosion
w/ Part List ............................................. 31
11.2 Accessories..................................... 36
11.3 Ordering Parts from ALTEC AIR ...... 36
12. Contacting ALTEC AIR ...................37
12.1 General........................................... 37
12.2 Sales ............................................... 37
12.3 Service............................................ 37
12.4 Technical Support........................... 37
13. Appendix .....................................38
13.1 Wiring Diagram .............................. 38
14. Warranty Statement.....................41
Registration Reminder ........................... 41
15. Notes...........................................42

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 5 of 42 P018425 –Rev. A
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 ANSI safety alert symbol as
well as a label of “WARNING!”, “CAUTION!”, or “NOTICE!”. 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!
To avoid electrical overload and shock hazard, incoming power to Air
Dryer must be sized according to Air Dryer specifications –refer to Air
Dryer Electrical Information in Section 5.4.3

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 6 of 42 P018425 –Rev. A
CAUTION!
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.
NOTICE!
Performing routine maintenance as outlined in the Maintaining Your
Dryer section will ensure optimal performance over the lifecycle of
your Air Dryer. Performing procedures not recommended by Altec
AIR or installing components not supplied by Altec AIR is NOT
RECOMMENDED AND MAY VOID THE WARRANTY.
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.

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 7 of 42 P018425 –Rev. A
5. Overview & Specifications
5.1 Product Description
This Refrigerated Air Dryer has been specifically designed, manufactured, and
tested for the purpose of reducing the humidity in compressed air. Any other use
is considered improper. Altec AIR will not be responsible for any problem due to
improper use. The outlet air from this product is not intended for use in breathing,
food, or other sterile applications.
The proper use requires the following to adhere to the installation instructions:
•Main power source voltage and frequency
•Flow rate, pressure, and temperature of the inlet air
•Ambient temperature
•Inlet air quality (dirty air with solid particles not acceptable)
5.2 Key Features
The Refrigerated Non-Cycling Air Dryer Series is designed to meet the demand
of your compressed air system with quality components that are built to last. RAD
series models range from 25 SCFM to 300 SCFM, and RHT models range from
10 SCFM to 120 SCFM.
•Consistent & reliable dry air at 45°F outlet dew point for RAD series, or
50°F outlet dew point for RHT Series Air Dryers
•Compact all-aluminum heat exchanger modules with low pressure drops
•Programmable automatic electronic drains
•Easy-access cabinet design for ease of maintenance & serviceability
•Suction pressure gauges provide simple & reliable monitoring of the Air
Dryer’s refrigeration system
•Top mounted inlet & outlet connections allow for easy installation of Air
Dryer, filters, & bypass valves

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 8 of 42 P018425 –Rev. A
5.3 Refrigerated Non-Cycling Series Air Dryer Models
Model Type:
•RAD: 100°F saturated, 100 PSIG Inlet Air, 45°F Outlet Dewpoint
•RHT: 180°F, 160°F Dew Point, 150 PSIG Inlet Air, 50°F Outlet
Dewpoint
Flow Rating:
•RAD Series Flow Rates: 25 - 300 SCFM
•RHT Series Flow Rates: 10 - 120 SCFM
Cooling Type:
•A: Air Cooled
•W: Water Cooled **
Nominal Voltage/Phase/Frequency:
•1: 115V/1Ph/60Hz
•2: 230V/1Ph/60Hz
•3: 230V/3Ph/60Hz
•4: 460V/3Ph/60Hz
•5: 575V/3Ph/60Hz
Options:
•D: Digital Scroll Compressor **
•P: Programmable Timer
•Z: Zero-Loss Drain **
** Selections may not be available at time of print. Please contact Altec AIR for more information.

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 9 of 42 P018425 –Rev. A
5.4 Technical Specifications
5.4.1 Air Dryer Dimensions
Model
Dimensions
H x W x D
Weight
Air Port
Sizes
(NPT)
Refrigerant
Type
RAD-0025A-1
RHT-0010A-1
23.9 x 18.9
x 16.9
92
1/2
R134a
RAD-0040A-1
RHT-0015A-1
102
1
RAD-0055A-1
RHT-0020A-1
102
RAD-0075A-1
RHT-0030A-1
25.8 x 18.4
x 27.6
160
RAD-0075A-2
RHT-0030A-2
160
RAD-0100A-1
RHT-0040A-1
173
RAD-0100A-2
RHT-0040A-2
173
RAD-0150A-1
RHT-0060A-1
29.3 x 21.9
x 34.1
190
1-1/2
RAD-0150A-2
RHT-0060A-2
192
RAD-0200A-1
RHT-0080A-1
205
RAD-0200A-2
RHT-0080A-2
225
RAD-0250A-3
RHT-0100A-3
35.8 x 23.7
x 34.8
300
R404a
RAD-0250A-4
RHT-0100A-4
300
RAD-0250A-5
RHT-0100A-5
331
RAD-0300A-3
RHT-0120A-3
300
2
RAD-0300A-4
RHT-0120A-4
300
RAD-0300A-5
RHT-0120A-5
345
RHT-0120A-4
300
RHT-0120A-5
345

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 10 of 42 P018425 –Rev. A
5.4.2 Air Dryer Conditions Information
RAD-0025
through
RAD-0200
RAD-0250
through
RAD-300
RHT-0010
through RHT-
0060
RHT-0080
through
RHT-0120
Maximum Inlet Air (F)
140
140
200
200
Max Air Pressure (PSIG)
232
232
232
232
Min Ambient Air (F)
45
45
45
45
Max Ambient Air (F)
120
120
120
120
Min ref. pressure (PSIG)
150
181
150
181
Max ref. pressure (PSIG)
300
450
300
450
Suction pressure (PSIG)
30
70
30
70
Discharge pressure
(PSIG)
115
225
115
225
Drain Port NPT
¼
¼
¼
¼
5.4.3 Air Dryer Electrical Information
Plug Types:
NEMA 5-15P NEMA 5-20P
WARNING!
To avoid electrical overload and shock hazard, incoming power to Air
Dryer must be sized according to Air Dryer specifications –refer to Air
Dryer Electrical Information in Section 5.4.3

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 11 of 42 P018425 –Rev. A
Model
Voltage
RLA
LRA
MCA
MOP
HP
Charge
(oz)
Cord and
Plug Type
RAD-0025-1
RHT-0010-1
115V-1Ph-
60Hz
3.65
29
6.21
15
1/5
9.5
NEMA 5-
15P
RAD-0040-1
RHT-0015-1
115V-1Ph-
60Hz
3.65
29
6.21
15
1/5
9.5
NEMA 5-
15P
RAD-0055-1
RHT-0020-1
115V-1Ph-
60Hz
4.91
27.5
8.38
15
1/4
9.5
NEMA 5-
15P
RAD-0075-1
RHT-0030-1
115V-1Ph-
60Hz
5.82
32
9.83
15
1/3
9.5
NEMA 5-
15P
RAD-0075-2
RHT-0030-2
230V-1Ph-
60Hz
3.03
16
5.18
15
1/3
9.5
Cord Only
RAD-0100-1
RHT-0040-1
115V-1Ph-
60Hz
9.5
48
15.38
25
1/2
17
NEMA 5-
15P
RAD-0100-2
RHT-0040-2
230V-1Ph-
60Hz
4.8
23
7.88
15
1/2
17
Cord Only
RAD-0150-1
RHT-0060-1
115V-1Ph-
60Hz
13.6
56
21.38
35
3/4
16
NEMA 5-
20P
RAD-0150-2
RHT-0060-2
230V-1Ph-
60Hz
7.3
38
12
20
3/4
26
Cord Only
RAD-0200-1
RHT-0080-1
115V-1Ph-
60Hz
13.6
78
24.25
40
1-1/4
22
NEMA 5-
20P
RAD-0200-2
RHT-0080-2
230V-1Ph-
60Hz
11.8
37
19.38
30
1
26
Cord Only
RAD-0250-3
RHT-0100-3
230V-3Ph-
60Hz
10.4
58
9.00
15
1-1/2
25
No Cord or
Plug
RAD-0250-4
RHT-0100-4
460V-3Ph-
60Hz
5.3
30
7.50
15
1-1/2
25
No Cord or
Plug
RAD-0250-5
RHT-0100-5
575V-3Ph-
60Hz
5.3
30
7.50
15
1-1/2
25
No Cord or
Plug
RAD-0300-3
RHT-0120-3
230V-3Ph-
60Hz
10.4
58
9.00
15
1-1/2
25
No Cord or
Plug
RAD-0300-4
RHT-0120-4
460V-3Ph-
60Hz
5.3
30
7.50
15
1-1/2
25
No Cord or
Plug
RAD-0300-5
RHT-0120-5
575V-3Ph-
60Hz
5.3
30
7.50
15
1-1/2
25
No Cord or
Plug
RLA: Rated Load Amps –maximum current the Air Dryer should draw under any
operating conditions
LRA: Locked-Rotor Amperage –The highest current the Air Dryer draws when power is
first applied
MCA: Minimum Circuit Amps –Highest steady-state electrical current
MOP: Maximum Over-Current Protection –Maximum size of over-current protection
device such as circuit breakers or fuses

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 12 of 42 P018425 –Rev. A
5.4.4 RAD Series Correction Factors
5.4.5 RHT Series Correction Factors
5.5 Air Dryer Function Overview
5.5.1 Functional Flow Diagram RAD-0025 through RAD-0055, RHT-0010
through RHT-0020

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 13 of 42 P018425 –Rev. A
5.5.2 Functional Flow Diagram RAD-0075 through RAD-0200, RHT-0030
through RHT-0080
5.5.3 Functional Flow Diagram RAD-0250 through RAD-0300, RHT-0100
through RHT-0120
Component
Description
Condenser & Fan
Cools the hot gas from the compressor into a liquid
Compressor
Draws in refrigerant and compresses it to a gas
Cross-flow Heat Exchanger
Exchanges thermal energy from the air to the refrigerant
Access Port
Ports for adding or removing refrigerant and for refrigerant gauges
Filter Drier
Filters out any particulates in the refrigerant
Hot Gas Bypass (HGB)
Regulates the cooling temperature based on refrigerant pressure
Drain Valve
Drain for condensed water removed from the air in the heat
exchanger
Thermostatic Expansion
Valve (TXV)
Regulates the rate liquid refrigerant flows into the evaporator

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 14 of 42 P018425 –Rev. A
6. Installing Your Air Dryer
6.1 Safety & Warning Information
WARNING!
This appliance is not intended for use by persons (including children)
with reduced physical, sensory, or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for
their safety.
WARNING!
Children must be supervised to ensure that they do not play with the
appliance.
WARNING!
To avoid electrical shock, damaged cords should be replaced by a
qualified individual
WARNING!
To avoid electrical overload and shock hazard, incoming power to Air
Dryer must be sized according to Air Dryer specifications –refer to Air
Dryer Electrical Information in Section 5.4.3

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 15 of 42 P018425 –Rev. A
6.2 Before You Begin
The Air Dryer cannot be tilted on its side or upside-down during shipping.
Upon arrival check the Air Dryer for damage. Inspect the pressure gauge through
the box cutout and ensure the gauge does not read zero. Review data label and
ensure proper electrical circuit to support voltage and amperage of the Air Dryer.
The Air Dryer must be installed in a well-ventilated room that is free from dust,
toxic gases, humidity, or pollution. Ambient temperatures must be at least 45° F
and not exceed 120°F.
All Air Dryers are designed to be installed on a concrete base capable of
supporting the weight and forces from the Air Dryer operation. Install the Air
Dryer by removing the Air Dryer from the shipping pallet.
Air Dryers must be at installed at least three feet away from walls and any other
equipment or walls.
Do not mix inlet and outlet air flow. Pipe diameter should be sized according to
the air flow requirement of the Air Dryer. Do not use the inlet and outlet of the
Air Dryer to support the weight of the air piping.
A complete compressed air filter kit is recommended to protect your Air Dryer
and downstream processes from contaminants found in the compressed air supply.
Oil and particulates can damage the heat exchanger and reduce the Air Dryer
efficiency.
A bypass may also be installed on the Air Dryer outlet, inlet and filtration to allow
for bypassing, depressurizing, maintenance, and servicing of the Air Dryer.

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 16 of 42 P018425 –Rev. A
Tubing used must be secured as the condensate is discharged at the system
pressure. Connect the condensate drain port to a collection point and dispose of
condensate in compliance to local regulations. Condensate may contain oil
particles from the compressor air.
Consult with a licensed technician to ensure the electrical network and protection
is sized properly. Ensure all fuses or breakers are correctly sized based on the data
label information. For electrical data refer to Section 5.4.3
Prior to connecting the Air Dryer to the electrical supply, verify the data
nameplate for the proper electrical information.
Air Dryers are equipped with either a power cord or terminal hookup locations.
Refer to Section 5.4.3 for plug type. Do not use any socket adapters at the main
plug.
Air Dryers without a power cord included must be wired by a licensed technician
according to the model specific wiring diagram as shown in Section 13.1 .

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 17 of 42 P018425 –Rev. A
6.3 Installation Configuration
Wet Air Receiver Tank Set-Up: Recommended for systems that consume less
than or equal to the maximum capacity of the air compressor
Dry Air Receiver Tank Set-up: Recommended for systems where the peak air
consumption exceeds the flow rate of the air compressor. The tank capacity must
be sized to compensate for the peak demand.
Figure 1: Wet Air Receiver Tank Set-Up
Figure 2: Dry Air Receiver Tank Set-Up

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 18 of 42 P018425 –Rev. A
6.4 Included Contents
Items included with the Air Dryer:
(1) Refrigerated Air Dryer
(1) User’s Guide
(4) Latch Keys RAD-0075 through RAD-0300, RHT-0030 through
RHT-0120
6.5 Required Tools and Materials
•Medium adjustable wrench
•Box cutter
•Cup of soapy water
•1-inch paint brush (recommended)
6.6 Installation Steps
6.6.1 Use a box cutter to remove the Air Dryer from the box and shipping
materials
NOTE: If ANY SHIPPING DAMAGE is detected, file a claim with the
shipping company prior to continuing the installation process.
6.6.2 Open Panel Latches and remove one of the Side Panels
6.6.3 Check for loose parts, hoses, wiring, and copper tubing for leaks for cracks
6.6.4 Place the Air Dryer at the desired operating location:
•Place the Air Dryer on a leveled surface
•Ensure Air Dryer is at least three feet away in all directions from other
equipment or walls
6.6.5 Remove the plugs from the Inlet and Outlet Air Ports

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 19 of 42 P018425 –Rev. A
6.6.6 Install plumbing from the Inlet and the Outlet of the Air Dryer to the
proper air compressor setup
6.6.7 Route the Condensate Drain Line to an environmentally approved disposal
system per local regulations.
6.6.8 Verify that the Air Dryer is powered OFF
6.6.9 Verify the main electrical supply voltage matches the voltage on the Data
Label and that proper circuit protection has been installed.
6.6.10 Plug AC Power Cord to Air Dryer or have a qualified individual wire the
correct power to the Air Dryer in accordance to local, state, regional, or
territory codes and requirements.
6.6.11 Power the Air Dryer ON
6.6.12 Use the soapy water and paint brush to check for leaks in the Air Inlet and
Outlet plumbing
6.6.13 Allow the Air Dryer to operate for 15 minutes
6.6.14 Verify the Refrigerant Suction Pressure
•R134a Air Dryers: 28-34 PSIG
•R404a Air Dryers: 72-80 PSIG
6.6.15 Verify the Condenser Fan Motors are operating
6.6.16 Confirm that condensate is discharging from the Condensate Drain based
on Drain Valve time settings

ALTEC AIR, LLC Refrigerated Non-Cycling Series Air Dryers User’s Guide
Page 20 of 42 P018425 –Rev. A
6.6.17 Check the Dew Point of the outlet air
6.6.18 Hook up Refrigerant Gauges
6.6.19 Check the Evaporating Pressure, Suction and Discharge Pressure
6.6.20 Use the wrench to adjust the Hot Gas Bypass a quarter turn at a time to
dial in the Evaporator Temperature to 32-34 degrees Fahrenheit
•After each quarter turn, allow Air Dryer to operate for 5 minutes
6.6.21 Reinstall the Side Panel
6.6.22 REGISTER YOUR AIR DRYER. See section 7 for details.