DESICCANT DRYER USER MANUAL

AEHD Series | Externally Heated | 150 - 3,000 scfm

The information in this manual is current as of its publication date and applies to AEHD Series desiccant air dryers until next revision of this manual.

WARRANTY NOTICE

Failure to follow the instructions

and procedures in this manual, or

misuse of this equipment, will void its

warranty.

WARNING!

Users are required to read the entire

User Manual before handling or using

the product. Keep the User Manual in

a safe place for future reference.

| AEHD Series Manual

Desiccant Air Dryer User Manual

DRYER DATA SHEET

Model Number: Serial Number:

Date of Manufacture:

Ship Date: Installation Date:

Customer Address:

Customer City: State/Zip:

Other:

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Desiccant Air Dryer User Manual

iii

TABLE OF CONTENTS

Section 1: Safety 1

1.1 Introduction 1

1.2 Safety Signal Words 1

1.3 General Safety Procedures 1

1.4 Safe Operating Procedures 2

1.5 Desiccant Safety Precautions 2

1.5.1 Desiccant First Aid Recommendations 2

1.6 Implementation of lockout/tag-out 2

1.6.1 Procedures 3

1.6.2 General Security 3

Section 2: Description 4

2.1 Introduction 4

2.2 System 4

2.2.1 How It Works 4

Section 3: Installation 6

3.1 Inspection on Arrival 6

3.2 Lifting Information 6

3.3 Installation Codes and Procedures 7

3.4 Locating and Installing the Dryer 7

3.5 Preliminary Start-Up Checklist 9

Section 4: Operation 12

4.1 Operating Procedures 12

4.2 Short-Term Shut Down 12

4.3 Short-Term or Long-Term Shut Down 12

Section 5: Controllers 14

5.1 Main Screens 14

5.2 Dryer Operation Screens 16

5.3 Alarm Screen 20

Section 6: Maintenance 22

6.1 Introduction 22

6.2 Maintenance 22

6.2.1 Weekly 22

6.2.2 Semi-Annual 22

6.2.3 Annual 23

Section 7: Troubleshooting 24

7.1 Introduction 24

7.2 AEHD Series Troubleshooting Guide 25

Appendix A: Specifications 26

A.1 Table of Specifications - AEHD Series 36

Appendix B: Material Safety Data Sheets 27

B.1 Activated Alumina Desiccant 27

Service Notes 34

Warranty Information 39

AEHD Series Manual |

Desiccant Air Dryer User Manual

1.1 Introduction

To ensure maximum performance and safe operation of

an Aircel desiccant dryer covered by this manual, everyone

involved with the dryer’s installation, operation, and

maintenance must read and carefully follow the instructions

in this manual.

Misuse or modification of this equipment may result in

personal injury. Do not misuse or modify. The high efficiency

heated regenerative desiccant dryer is used exclusively for

purifying compressed air in non-hazardous locations.

The state-of-the-art system is designed and constructed

in accordance with the rules and regulations regarding

adsorption technology and industrial safety. There are

hazards accompanying this type of product if not operated

for the intended purpose by trained and specialized

personnel.

1.2 Safety Signal Words

Throughout this manual, signal words are present to advise

of safety precautions and/or standard practices. Obey these

signal words as dened below:

DANGER! - Indicates an imminently hazardous situation

which, if not avoided, will result in death or serious injury.

WARNING! - Indicates a potentially hazardous situation

which, if not avoided, could result in death or serious injury.

CAUTION! - Indicates a potentially hazardous situation

which, if not avoided, may result in minor or moderate

injury.

NOTICE - used to address practices not related to personal

injury.

1.3 General Safety Procedures

• Electrical work must conform to the specifications

indicated by Aircel and any local or state laws that may

apply. In the absence of such codes, install unit according

to National Electrical Code, NFPA No. 70 latest edition.

• Personnel must wear appropriate safety gear including

eye and ear protection before working on any electrical

or mechanical aspects of the machine.

• Appropriate tools have to be used for all installation and

maintenance work. If special tools are not available to

the installation crew, contact the factory or your Aircel

representative.

• A copy of the Operation Manual must be made available

to all personnel involved with the installation, operation,

and maintenance of the equipment.

• Before performing any maintenance operations on

the equipment, the unit must be shut down, isolated,

electrical power removed, and completely depressurized.

• To ensure compatibility and continued trouble free

operation, only genuine Aircel parts must be used.

• DO NOT make any constructional changes to the unit.

Only Aircel or its authorized representatives with the

prior approval can perform any constructional work on

the machine.

• DO NOT use foreign parts.

• DO NOT use compressed air from the dryers for

breathing purposes - install a breathing air package to

ensure conformance with OSHA regulations.

• DO NOT disable or disengage any protective equipment

used on the machine.

NOTICE

For optimum performance, use only Aircel replacement

parts.

SECTION 1: SAFETY

CAUTION!

Misuse / modication hazard

Misuse or modication of this equipment may result

in personal injury.

Do not misuse or modify this equipment under any

conditions.

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Desiccant Air Dryer User Manual

1.4 Safe Operating Procedures

• Pressurize and depressurize compressed air SLOWLY!

Always open air valves slowly when pressurizing the airline

system or equipment. Repair air slowly when depressurizing

your air system or equipment.

• Circuit breakers, fusable disconnect, and wiring should

conform to national and/or local electrical codes. Make

certain that qualified electrical personnel perform the

electrical installation for this unit.

• Only use original fuses for the rated voltage and current.

• Shut down the unit in the correct recommended procedure.

• Before any work on system, always depressurize the unit

and remove all electrical power.

• After shut down, put up warning notice to prevent the unit

from being switched “ON” accidentally.

• Inspect all piping, hoses, and connections. Make sure that

all hoses are in good condition and are rated for the correct

working pressure. Do not allow hoses to come into contact

with oils, chemicals, or sharp objects.

• Secure condensate drain lines. Unsecured, flexible drain

lines may whip violently under pressure and may cause

bodily harm.

1.5 Desiccant Safety Precautions

1.5.1 DESICCANT FIRST AID RECOMMENDATIONS

1.5.1.1 INHALATION

Use a contoured dust mask during loading and unloading

operations. If high concentrations are inhaled, immediately

move to fresh air. Keep person calm. If not breathing, give

articial respiration. If breathing is dicult, give oxygen. Call a

physician.

1.5.1.2 SKIN CONTACT

In case of contact, immediately flush skin with plenty of soap

and water for at least 15 minutes.

1.5.1.3 EYE CONTACT

In case of contact, immediately flush eyes with plenty of water

for at least 15 minutes. Call a physician.

1.5.1.4 SPILLS

Clean accidental spills by vacuuming, sweeping, or flushing to a

sewer treated for suspended solids. Avoid creating excess dust.

1.6 Implementation of lockout/tag-out

The energy control procedure denes actions necessary to

lockout a power source of any machine to be repaired, serviced,

or set-up, where unexpected motion, or an electrical or other

energy source, would cause personal injury or equipment

damage. The power source on any machine shall be locked

NOTICE

These dryers do not supply breathing quality air

Aircel AEHD Series dryers do not remove carbon

monoxide and is not safe for human respiration

(breathing). Breathing air must be at least grade

D quality as described in compressed air and gas

association (CAGI) commodity specications 67.1-1966.

User may refer to OSHA 29 CFI 1910.134 for special

precautions and equipment suitable for breathing air

applications. Aircel disclaims any liability what so ever

for loss, injury or damage.

WARNING!

Inhalation, Skin, & Eye Irritant

The desiccant used in this equipment is not considered

hazardous. Contact with and disposal of desiccant

must be in accordance with the relevant MSDS and

all local codes and regulations. The following lists the

more common safety measures to be observed during

loading and unloading operations. Reference the

MSDS in the appendix for complete safety measures.

AEHD Series Manual |

Desiccant Air Dryer User Manual

out by each employee doing the work except when motion is

necessary during setup, adjustment, or troubleshooting.

1.6.1 PROCEDURES

The established procedures for the application of energy

control shall cover the following elements and actions and

shall be initiated only be Authorized Persons and done in the

following sequence:

1. Review the equipment or machine to be locked and tagged

out.

2. Alert operator and supervisor of which machine is to be

worked on, and that power and utilities will be turned o.

3. Check to make certain no one is operating the machine

before turning power o.

4. Turn o the equipment using normal shut-down procedure.

5. Disconnect the energy sources:

a. Air and hydraulic lines should be bled, drained, and

cleaned out. There should be no pressure in these lines

or in the reservoir tanks. Lockout or tag lines or valves.

b. Any mechanism under tension or pressure, such as

springs, should be released and locked out or tagged.

c. Block any load or machine part prior to working under it.

d. Electrical circuits should be checked with calibrated

electrical testing equipment and stored energy and

electrical capacitors should be safely discharged.

6. Lockout and/or tag out each energy source using the

proper energy isolating devices and tags. Place lockout

hasp and padlock or tag at the point of power disconnect

where lockout is required by each person performing work.

Each person shall be provided with their own padlock and

have possession of the only key. If more than one person is

working on a machine, each person shall ax personal lock

and tag using a multi-lock device.

7. Tag-lock devices shall be used only when power sources

are not capable of being locked out by use of padlocks and

lockout hasp devices. The name of the person axing the

tag to power source must be on tag along with date tag was

placed on power source.

8. Release stored energy and bring the equipment to a “zero

mechanical state.”

9. Verify isolation: Before work is started, test equipment to

ensure power is disconnected.

1.6.2 GENERAL SECURITY

1. The lock shall be removed by the Authorized Person who

put the lock on the energy-isolating device. No one other

than the person/persons placing padlocks and lock out

hasps on power shall remove padlock and lockout hasps

and restore power. However, when the authorized person

who applied the lock is unavailable to remove it, her or his

Supervisor may remove padlock(s) and lock out hasp(s) and

restore power only if it is rst:

a. veried that no person will be exposed to danger..

b. veried that the Authorized Person who applied the

device is not in the facility.

c. noted that all reasonable eorts to contact the Authorized

Person have been made to inform her or him that the

lock out or tag out device has been removed.

d. ensured that the Authorized Person is notied of lock

removal before returning to work.

2. Tag out system - Tags are warning devices axed at points

of power disconnect and are not to be removed by anyone

other than the person placing tag on power lockout. Tags

shall never be by-passed, ignored, or otherwise defeated.

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Desiccant Air Dryer User Manual

2.1 Introduction

Aircel AEHD Series dryers are engineered and manufactured

to provide you with many years of trouble free service. To

ensure that you get the get first class service from this

equipment, we recommend you take some time and read

the contents of this manual.

This manual contains information required for installing

and maintaining your new equipment. It also includes the

safety procedures and corresponding drawings. We strongly

suggest that all personnel involved with the machine, read

the entire contents of the manual before proceeding with

the installation or maintenance activities.

The manufacturer reserves the right to make changes

without any prior notification and is not obligated in any

manner. Information in this manual is deemed current at

the time of publication and Aircel disclaims all liability for

any errors resulting in any loss or damage.

2.2 System

The AEHD Series externally heated desiccant air dryer

products cover the flow range listed on the manual front

cover and provides reliable dew point performance. The

heated regenerative desiccant dryer is a continuous-duty

compressed air dryer used in industrial applications to

provide high drying efficiency for large volume airflows.

Continuous duty means no downtime. A switching valve

alternates the desiccant chambers between the drying and

regeneration phases. While one chamber is drying, the

other is regenerating.

The self-contained heated regenerative desiccant dryer

includes a control system, dryer, heater, and silencers.

Untreated compressed air contains many contaminants

such as water, compressor oil, pipe scale and contamination

from ambient air. These contaminants cause excessive

corrosion, erosion, freezing and product contamination to

all components that come in contact with the untreated

compressed air.

A regenerative type dryer system with all recommended

filtration will remove these contaminants to harmless

levels. The end result is that instruments that come in

contact with the dry compressedair stay clean and do not

corrode, therefore lasting much longer. Products that may

come in contact with clean dry compressed air are virtually

unaffected, hence rejection rates are reduced.

Aircel AEHD series externally-heated regenerative desiccant

compressed air dryers dry compressed air to -40°F PDP

(Pressure Dew Point). The compressed air stream is passed

through a desiccant bed, which removes the moisture

through the process of adsorption. Twin towers filled with

activated alumina desiccant alternate between drying and

regeneration. These dryers offer fail-safe design in the

event of power interruption, as air will continue to flow

through the dryer without dead heading and purge exhaust

valves will close, preventing loss of air pressure.

An LCD display provides operation information and tower

operating status. The highest quality non-lubricated air/gas

valves are used to ensure reliable operation for many years

to come.

2.2.1 HOW IT WORKS

The Aircel model AEHD is an externally-heat reactivated

desiccant compressed air dryer system, with two vessels

each loaded with activated alumina desiccant to adsorb

moisture from the inlet moisture-laden air stream.

While one vessel is drying (removing) moisture vapor from

the inlet air, the other vessel is regenerating (desorbing)

moisture from desiccant media that was adsorbed onto

the desiccant surfaces during the drying cycle to enable the

regenerated desiccant to dry the inlet air again.

During the regeneration process, a small portion of dry

outlet air is heated to a temperature of 400°F to regenerate

(remove) the moisture from the desiccant bed.

The drying and regenerating process is repeated

continuously between the two towers every 4 hours to

provide an uninterrupted continuous clean, dry airflow to

the customer process.

The inlet moisture-laden, dirty, compressed air is filtered

as it passes through the standard high-efficiency inlet

coalescing pre-filter where moisture and possible oil-mist

are coalesced into larger droplets. These droplets are then

removed via an automatic drain before the filtered air

enters the dryer.

NOTE: The dryer is designed to remove moisture in vapor

form only - liquid moisture and oil is detrimental to the

dryer system.

The inlet moisture-vapor laden compressed air continues to

the inlet valve and is directed to the bottom of the on-line,

pressurized drying desiccant vessel. The air stream is dried

by the vessel desiccant media and exits the top of the vessel

to the outlet valves (typically check valves), then directed to

the standard outlet high temperature particulate after filter

to remove particulates from the dry outlet air stream before

entering the downstream customer process.

The standard EMS (Energy Management System) control

system continually monitors the mid-bed humidity level

SECTION 2: DESCRIPTION

AEHD Series Manual |

Desiccant Air Dryer User Manual

Pre-Filter

Tower 1 Tower 2

Heater

After Filter

FIGURE 2-1: TYPICAL SCHEMATIC FLOW DIAGRAM

AEHD Series 150 - 3,000 scfm rated model

in the on-line drying vessel. At the end of the drying cycle, if

the moisture level is below the set level, the drying cycle will

continue on the same vessel for an extended time until the

moisture level reaches the set point. The EMS control system

saves energy by extending the drying cycle, thus reducing the

overall average process air consumption used for regeneration,

as well as reducing overall heater on-time in periods of low load

demand.

While one vessel is drying the inlet moisture-laden compressed

air, the other vessel is regenerating the desiccant bed.

During the regenerating cycle, the regenerating vessel is first

depressurized slowly to atmospheric pressure through a purge

exhaust valve and muffler to ambient. A small portion of the

outlet dried compressed air flows through a purge adjustment

valve to an orifice to reduce the regenerating airflow.

The regeneration purge air flows to the heater at near

atmospheric pressure where the regeneration air temperature

is heated to a temperature of 400°F. The air then passes

through the regeneration heater check valve on the upper

line and into the regenerating vessel where the moisture is

desorbed (removed) from the vessel desiccant bed.

The hot, moist regeneration air then flows from the bottom of

the vessel to the purge exhaust valve and muffler to ambient.

Dryer system operation is performed automatically by the APC

(Aircel Programmable Controller) control system. The standard

drying and regeneration time cycle is an 8 hour NEMA cycle.

While one vessel is drying incoming compressed air for 4 hours,

the other vessel is (1) depressurizing for 2 minutes, (2) heat

regenerating/purging for 3 hours, (3) cooling/regenerating/

purging for 55 minutes, (4) repressurizing the vessel to the line

pressure for 3 minutes before (5) switching over to the other

vessel, any finally, (6) just before the end of the repressurization

period the EMS system checks the moisture level in the drying

vessel.

If the EMS senses moisture levels are below the set point,

the drying vessel will remain online, drying for an extended

time and the regenerated vessel will be in standby and

repressurized. When the drying vessel reaches the set moisture

level, the vessels will switch. Switching from one vessel to the

other vessel is performed only when both desiccant towers are

at line pressure to prevent line surge and to minimize desiccant

abrasion.

The dryer system process is fully automatic and continuous,

typically switching vessels every 4 hours, alternating between

drying and regenerating.

NOTE: The EMS (Energy Management System) control system

will extend drying mode for longer than the 4 hour period.

| AEHD Series Manual

Desiccant Air Dryer User Manual

3.1 Inspection on Arrival

All heated regenerative desiccant dryers are tested and

operated before shipment. However, shipping vibration may

cause damage such as loosening of certain parts. To ensure

smooth installation, it is recommended that immediately upon

receipt of the unit, the system is checked for the following:

1. Inspect unity on delivery.

2. Report any damage to the delivery carrier.

3. Request a written inspection report from the Claims

Inspector to substantiate the claim.

4. File claims with the delivery carrier.

5. Compare unit received with description of product ordered.

Check the serial plate label and make sure that it is the

correct Model was ordered. Note the equipment Capacity

and Power Supply requirements and ensure that they are in

accordance with your specifications. The rated conditions

of the dryer are indicated on the serial plate label. If there

is any discrepancy, contact your representative listed on

the manual back cover.

6. Vibration during shipping can loosen the connections.

Inspect all pipe and tubing and make sure they are all

tightened and secured.

7. Report incomplete shipments to the delivery carrier and

your service representative.

3.2 Lifting Information

1. Use all lifting points provided. Special care must be used

when lifting the dryer to prevent tip-over.

2. Use clevis connectors, not hooks, on lifting slings.

3. Only lift unit under support frame/base by using the fork

lift openings provided. Do not lift by piping.

4. Check the approximate weight provided on the specification

control drawing to ensure adequate lift truck capacity.

5. Allow only qualified operators to lift the equipment.

6. Refer to applicable OSHA regulations and local codes when

using cranes, forklifts, and other lifting equipment.

SECTION 3: INSTALLATION

WARNING!

Lifting Hazard

Failure to lift the unit correctly can result in severe

personal injury or property damage.

• Use appropriate lifting equipment and adopt

all safety precautions needed for moving and

handling the equipment.

• A forklift, or crane is recommended for unloading

and installation.

• Lift unit by lifting lugs and frame only. Do not lift

by piping.

AEHD Series Manual |

Desiccant Air Dryer User Manual

3.3 Installation Codes and Procedures

• Safe and efficient operation of the unit depends on proper

installation.

• Authorities with jurisdiction should be consulted before

installing to verify local codes and installation procedures.

In the absence of such codes, install unit according to the

National Electric Code and NFPA No. 70-latest edition.

• A qualified installation and service agent versed in all

regulatory codes must complete installation of this unit.

• All shipping materials, including shipping covers, must be

removed from the unit prior to, or during, unit installation.

3.4 Locating and Installing the Dryer

1. Locate unit on a level foundation. Dryer should be mounted

on a suitably structured flat and level floor or base that is

free from vibration. Special care must be used when lifting

the dryer to prevent tip-over.

2. Bolt dryer skid to the foundation using the bolt holes

provided in the frame. The frame(s) must be securely

bolted to the foundation to prevent movement resulting

from earth tremors and induced piping vibration.

3. Make certain all shipping materials have been removed

such as crating, plastic wrap, fitting covers, etc.

4. Install unit to provide adequate clearance for maintenance

services. Dryer and accompanying filters should be installed

with at least three (3) feet clearance from the adjoining

walls to provide easy access for routine maintenance and

adequate air flow.

5. Unit should be located in a weather protected area with a

temperature range between 70 - 100°F.

7. Install flanges, fittings, and piping on system using the

correct pipe size and pressure rating.

7.1 Outlet piping and components should be rated for a

minimum of 250°F

7.2 Connect inlet piping and shutoff valve of the dryer to the

moist air from the compressor/receiver/inlet filter.

7.3 Connect outlet piping with outlet shutoff valve.

8. A block and bypass valve system can be installed around

dryer system to keep the downstream air supply pressurized

during repair or maintenance of the dryer system.

WARNING!

Electric Shock Hazard

This machine is connected to high-voltage power,

which can cause severe electrical shock and injury.

• Follow proper lock out/tag out procedures before

performing service or maintenance work.

• Electrical installation must be performed by a

qualied electrician and comply with all applicable

national and local codes.

CAUTION!

High Heat Hazard

During vessel switchover, the dryer outlet line and lter

may become extremely hot (250°F) for approximately

20 minutes.

Dew point spike may be a longer duration if airow

through the dryer is lower than the rated ow. In an

upset condition, outlet temperature could exceed

400°F.

CAUTION!

Moisture contamination hazards

Air supplied while the regenerative desiccant dryer is

bypassed will be wet and saturated. Some downstream

processes may not tolerate this air supply due to the

risk of contamination of sensitive equipment.

WARNING!

High heat hazards

Ensure the bypass valve(s) are rated for a minimum of

250°F. An upset condition could exceed 400°F.

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Desiccant Air Dryer User Manual

9. Compressed air piping must be at least the same size as

that of the inlet and outlet connections of the dryer. If

necessary, larger pipe sizes can be used with reducers.

10. Provide adequate power supply. See rating and

specification information on dryer data label and drawing

package information. Make certain dryer system is properly

grounded.

11. A back pressure regulator can be installed at the air outlet

of the dryer to keep the dryer at a constant pressure

regardless of downstream demand. This prevents the

dryer media bed from fluidizing (lifting/moving) due to a

high downstream demand and high pressure loss in the

dryer system. This fluidization causes high velocity in the

media bed and leads to fluidization of the media, affecting

dryer performance and reducing the life of the desiccant

bed media.

12. The dryer relief valves are designed and sized to relieve

excess pressure resulting from the thermal expansion

of air trapped in the vessels in the event the vessels are

subjected to heat, such as in a conflagration. Valves are set

to relieve at the maximum design pressure of the desiccant

vessels.

13. In the event that mufflers have been shipped loose, install

and secure to the back of the desiccant towers.

14. Ensure the dryer towers are filled with desiccant. Larger

dryers may have desiccant shipped separately; in which

case, the media has to be filled into the pressure vessels

from the desiccant fill ports at top of each vessel. Care

must be taken when filling the media and must be done

gradually to prevent powdering.

15. Install the Aircel inlet compressed air particulate pre-

filter drain to an open drain system for safety and to

prevent puddling of water at dryer system area. Piping

should be secured and angled slightly downward to drain

condensate. Drain system must have a vented air gap to

prevent a pressurized condition.

16. If you intend to vent your exhaust with additional piping,

the discharge piping from the exhaust should not be piped

upward without an arrangement for removing trapped

condensate. Make sure that you do not apply a back

pressure on this exhaust system. If exhaust piping is to be

extended, stay within 15 to 20 feet and use larger diameter

piping.

17. The automatic drain can be piped to an open drain system

if allowed, or to a condensate treatment system, then to

an open drain system. Make sure the piping is secured and

rated for the pressure and temperature of the application,

WARNING!

Unsafe personnel conditions hazard

Keep personnel safely away from desiccant dryer relief

valves. In the event of discharge, the relief valves can

cause an unwanted condition or hazard to personnel.

Some discharge ports could be piped to a safe location.

Drain

Valve

Air or Water

Cooled

Condenser

Air

Compressor

Drain

Valve

Dry Air

to Plant

Drain

Valve

Drain

Valve

After Filter

Pre-Filter

Separator

FIGURE 3-1: Typical Installation Setup

AEHD Series Manual |

Desiccant Air Dryer User Manual

and can be removed if filter bowl (in some systems) needs

to be removed for servicing.

18. Make all electrical connections to the system as shown on

the wiring diagram. Special care must be taken in connecting

the proper voltage as indicated on the specification sheet

and wiring schematic. It is recommended to supply power

to the dryer system through a customer supplied fused

disconnect switch to remove all power to the system.

19. If proper system pressure cannot be maintained in the

adsorption vessel during drying, install a system back

pressure valve downstream of the dryer to protect the

dryer from high velocity resulting from low service pressure.

Failure to maintain the correct operating pressure will

cause elevated dew point and premature failure of the

desiccant.

20. If there are any changes in the operating conditions of

the system from those published in this manual, contact

Technical Support at the number published on the back of

this manual.

3.5 Preliminary Start-Up Checklist

In addition to the below notes, cautions and warnings, refer

to the previous sections on General Safety Procedures, Safe

Operating Procedures and any safety procedures required by

end user.

1. Check the inlet and outlet connections are the correct size,

pressure rating, and tightened securely.

2. Ensure the wet inlet air line is connected to the inlet pre-

CAUTION!

Follow local codes

Before connecting condensate to open drainage

system make certain this is allowed, user or local

codes may require treatment before discharging into

drain system.

WARNING!

Electric Shock Hazard

This machine is connected to high-voltage power,

which can cause severe electrical shock and injury.

• Follow proper lock out/tag out procedures before

performing service or maintenance work.

• Electrical installation must be performed by a

qualied electrician and comply with all applicable

national and local codes.

Aircel LLC is not liable for any code violations,

component damage, downtime or consequential

damage related to customer supplied electrical

components and connections.

WARNING!

• Tower/vessel relief valves are set from

manufacturer. DO NOT adjust these valves.

• Always pressurize and depressurize the system

slowly.

• This system must be operated or serviced by

qualied persons familiar with pressurized

systems and electrical controls.

• Before servicing any component make certain the

system is depressurized and de-energized.

• Hearing protection is recommended for personnel

protection when the system is in operation and/

or pressurized in order to protect from any loud

bursts of pressurized air to atmosphere. This can

occurs through the depressurization and purge

exhaust muers, vent ports, and lter drain ports.

• Eye protection safety glasses are recommended

for personnel protection when the system is in

operation and/or pressurized in order to protect

from possible ying debris expelled from the

purge exhaust muers during tower, vent, or

drain depressurization or any other possible ying

debris.

• Do not use the dryer without the inlet lter

element or outlet lter element.

• Do not use the dryer without the vessel desiccant

media in place.

| AEHD Series Manual

Desiccant Air Dryer User Manual

filter with automatic drain valve (typically, the inlet piping

flows from inlet pre-filter to bottom of vessels).

3. Ensure the dry outlet air is connected to the outlet after

filter with the manual drain valve which is piped from top

of vessels to outlet after filter.

4. Check that the correct power supply is connected to the

desiccant air dryer system with an adequate disconnect

switch.

5. Check that all manual valves are in correct open and

closed positions and that compressed air is available to be

supplied to the desiccant air dryer system.

a. Dryer system block and bypass valving (if applicable):

Outlet isolation block valve should be closed, inlet

isolation block should be open, and the bypass valve

should be open.

b. Inlet coalescing pre-filter automatic drain isolation valve

should be open.

c. If a manual vent/drain valve is used near the inlet

coalescing pre-filter automatic drain valve to ambient,

this valve should be closed. (This inlet pre-filter manual

drain valve is used in some systems in case of automatic

drain valve failure.)

d. Outlet particulate after filter manual drain/vent valve

should be in closed position.

e. Any filter differential pressure gauge isolation valves

should be in open position.

f. Any pressure gauge isolation valves should be in open

position.

g. Control air isolation valve, to be open position and

set to 100 psi, adjustable via the control air pressure

regulator located near the electrical enclosure.

6. With the customer-supplied compressed air to the system,

OPEN the inlet valve slowly (two to three minutes) to

gradually pressurize the system. Do not open valve too

quickly. Opening valve and suddenly pressurizing the

system can cause damage to the dryer heat exchanger and

other components. One vessel will pressurize slower than

the other; if one vessel does not pressurize, open the purge

adjustment valve to pressurize.

7. Check the complete dryer system for leaks. Use soap and

water to test all joints and fittings. If found, immediately

depressurize the system, repair all leaks, and re-test.

8. Turn the dryer system on via the power on/off switch.

9. After the dryer is on and operating, one tower will

depressurize to atmospheric pressure. The purge

adjustment valve can now be adjusted to 50-55 psig read

on the purge pressure gauge (located at back of dryer).

Increase or decrease purge pressure via purge adjustment

valve. The heater outlet temperature should reach at least

375 - 400°F after approx. 20-30 minutes; if temperature is

too low, start closing the purge adjustment valve in small

increments. If temperature is too high, open the purge

adjustment valve in small increments until temperature

is stable and the heater does not cycle on and off

continually. The heater should stay on almost continuous

during the heating mode. NOTE: Typical purge pressure

setting is 50 - 55 psig.

10. Refer to the system screenshots and descriptions for

additional information. The controls have an advancing

feature to check operation quicker if required and allows

the operator to make certain the dryer operates correctly

in each step in a shorter time period.

11. Open the outlet block valve slowly, then close the bypass

valve (if bypass valve was not initially closed.

12. When unit is in operation, the display on the enclosure

door will show the dryer status and any alarm conditions.

13. When a common shutdown alarm condition is active, the

system will display the shutdown alarm condition active in

the alarm screen area. Common shutdown alarms include

temperature alarms and incorrect pressure alarms (or

failure to switch), which stop dryer operation and require

manual reset. After alarm problem has been corrected

the system will need to be manually reset. The common

shutdown alarm red light will be on, and the common

shutdown alarm relay inside the enclosure will de-energize.

NOTE: High humidity could be displayed in the alarm

screen even though an actual shutdown alarm is active.

This occurs because of how the alarms overlap on the

display. The only alarm with automatic reset is the high

humidity alarm, which does not activate the common

shutdown alarm light and relay. A number of dry common

shutdown alarm contacts for remote indication are

available inside the enclosure. See electrical drawings for

terminal numbers.

14. Heater temperature control settings are factory set. The

typical setting is as follows:

a. Heat Control: 400°F

b. Heater Mid-Range: 850°F

c. Heater High Limit: 1,000°F

d. Purge Air High Limit: 500°F

CAUTION!

Some downstream systems may take a long time period

to pressurize. Make certain dryer pressure remains

at normal operating pressure while pressurizing

downstream system.

AEHD Series Manual |

Desiccant Air Dryer User Manual

15. If the system has an optional outlet dew point readout

with high humidity, the outlet dew point will be displayed

on the system display. Verify the needle valve prior to the

dew point sensor is fully open, the valve after the sensor is

slightly open with a slight amount of air at the end of the

exhaust coiled tube to ambient. These adjustments will set

up the airflow for the dew point sensor.

16. The optional dew point control setting are recommended

to be set at the following levels:

a. PDP: -50

b. Humidity Alarm: 10°F

These settings can be changed as necessary. The dew

point control adjustment should be within -20 to -70 PDP.

17. Verify the mid-bed RH sensor exhaust valve (part of the

standard Energy Management System on the AEHD series

dryers) is adjusted properly. This valve is located near

electrical enclosure. A small rectangular block of aluminum

houses the mid-bed RH sensor and has a needle valve

attached to it. The needle valve should be slightly opened

until a small amount of air is exhausted to ambient. This

will set up the flow of air for the mid-bed RH sensor to

operate the Energy Management System.

18. Dryer cycle times are as follows:

Drying: 4 hours

Depressurizing: 2 minutes

Heating: 180 minutes

Cooling: 55 minutes

Repressurizing: 3 minutes

19. Check drain valve for proper operation and discharge of

liquids (filters and separators, etc.). If automatic drain valve

has a drain isolation valve, make certain the valve is open

so condensate can be properly drained.

20. Verify the purge exhaust valves open slowly within a 5-8

second time period to depressurize the vessel at a slower

rate. Some adjustment of the flow control valve attached

to the actuator may be required; after adjustment, tighten

down the locking collar.

21. Verify complete dryer operation. Do not allow system to

operate unattended until satisfied the dryer system is

operating correctly.

22. After the initial start-up, the dryer operation is completely

automatic.

| AEHD Series Manual

Desiccant Air Dryer User Manual

4.1 Operating Procedures

After the initial startup, the dryer operation is completely

automatic. To understand the details of the operation, see

Figure 2-1: Typical Schematic Flow Chart on page 5.

4.2 Short-Term Shut Down

(For Maintenance)

The desiccant air dryer system can be shut down at any time.

Some systems may have a customer supplied bypass valve.

This can be slowly opened to allow air downstream.

1. Slowly close the outlet shut off valve (customer supplied).

2. Slowly close the inlet shut off valve (customer supplied).

3. Next, turn on power off/on switch to off position at the

dryer system electrical enclosure.

4. Disconnect main electrical power supply to dryer system.

5. Open vent valve located on bottom of the outlet after filter

to depressurize the system.

6. The system is now able to be serviced.

4.3 Short-Term or Long Term

Non-Usage Period Shut Down

SECTION 4: OPERATION

WARNING!

Electric Shock Hazard

This machine is connected to high-voltage power,

which can cause severe electrical shock and injury.

• Follow proper lock out/tag out procedures before

performing service or maintenance work.

• When the system is shutdown and power removed,

lock out power supply and depressurize system

before performing maintenance or service work

to avoid injury to personnel or property damage.

WARNING!

Electric Shock Hazard

This machine is connected to high-voltage power,

which can cause severe electrical shock and injury.

• Follow proper lock out/tag out procedures before

performing service or maintenance work.

• When the system is shutdown and power removed,

lock out power supply and depressurize system

before performing maintenance or service work

to avoid injury to personnel or property damage.

WARNING!

This type of dryer operates best if left on with air

supplied to the unit whenever possible.

This unit can be left pressurized after the dryer is

switched o.

WARNING!

Non-purified/moist bypass air could damage

sensitive downstream equipment components. Some

operations may not tolerate the contaminated air.

In these situations, do not utilize a bypass valve.

AEHD Series Manual |

Desiccant Air Dryer User Manual

For best purity, the system is best left isolated and pressurized.

Some systems may have a customer supplied bypass valve.

This can be slowly opened to allow air downstream.

1. Slowly close the outlet shut off valve (customer supplied).

2. Slowly close the inlet shut off valve (customer supplied).

3. Next, turn on power off/on switch to off position at the

dryer system electrical enclosure.

4. If an optional outlet dew point sensor is included int he

system, ensure the outlet needle valve attached to the

sample cell is closed. The needle valve is located closest

to the exhaust coil to ambient. No airflow should be felt at

end of coiled tube.

5. The system should now be isolated and pressurized.

WARNING!

This type of dryer operates best if left on with air

supplied to the unit whenever possible.

This unit can be left pressurized after the dryer is

switched o.

WARNING!

Non-purified/moist bypass air could damage

sensitive downstream equipment components. Some

operations may not tolerate the contaminated air.

In these situations, do not utilize a bypass valve.

| AEHD Series Manual

Desiccant Air Dryer User Manual

5.1 Main Screens

This is the screen where extended drying can be selected or

turned off. To select, press the OK button twice then press

the up or down arrow to highlight the appropriate selection.

Press OK to make the selection then press ESC back to the

main menu. The check mark will indicate which selection has

been made.

Fixed Time Cycles. With Energy Management selected, the

unit has the ability to save energy when regenerating is not

needed. In Energy Management, the deciding factors are the

dew point setting and the relative humidity setting. These

can be changed on the Settings Screen. Once both values

have been met, the unit will go into savings mode labeled

Extended Drying.

SECTION 5: CONTROLLERS

FIGURE 5-1: Alarm Screen

No alarm is when there are no active alarms. During this

state, the alarm relay contact will be active. (Normally open

contact will be closed/normally closed contact will be open).

This allows the remote alarm to trip when power is lost to

the unit.

For more detailed alarm screens, refer to section 5.3.

This screen allows the user to change the set point for the

failure to shift alarm. It is not recommended to change this

setting without first contacting the Aircel Service Department.

FIGURE 5-3: Control Menu Screen

FIGURE 5-2: Failure To Shift Entry Screen

FIGURE 5-4: Main Screen

5.1.1 Alarm Screen

5.1.3 Control Menu Screen

5.1.2 Failure to Shift Entry Screen

5.1.4 Main Screen

AEHD Series Manual |

Desiccant Air Dryer User Manual

The settings menu allows you to make changes to the set points

of the relative humidity, dew point and high humidity control

set points. These set points are used to control the unit for

energy savings.

The high humidity set point is to alert the user of high dew

point that could possibly lead to moisture downstream of the

dryer. To make changes to the set points, press the OK button

twice.

Next press the up or down arrows to highlight the setting to

be changed, then press the OK button again. The individual

numbers should now be flashing. Press the left or right arrows

to move to the particular number that needs to be changed

and press the up or down arrow to make the change. Once

the changes are made to the selection, press the OK button to

confirm the change.

Once all selections have been completed, press the ESC button

to return to the main menu.

The analog screen allows the user to view the sensor outputs. The total hours of operation and total hours of energy

savings can be viewed from this screen.

FIGURE 5-5: Analog Screen

FIGURE 5-7: Settings Screen FIGURE 5-8: Settings Screen

FIGURE 5-6: Operation Hours Screen

5.1.5 Analog Screen

5.1.7 Settings Screen

5.1.6 Operation Hours Screen

| AEHD Series Manual

Desiccant Air Dryer User Manual

5.2.2 STEP TWO: Regenerating

Step 2 is the regeneration step. In this step, vessel 2 will

be heated then cooled to help regenerate the media. The

heating/cooling step is 235 minutes (3hrs, 55mins).

To advance from heating to cooling, press and hold the up

arrow button for approx. 6 seconds then release. If not

released within another 6 seconds, the cooling step will also

be skipped. To skip the cooling mode, press the up arrow

again for up to 12 seconds.

5.2 Dryer Operation Screens

5.2.1 STEP ONE: Depressurizing

Step 1 is the depressurization step. In this step, Vessel 2

depressurizes to allow for regeneration of that tower. This

step is 120 seconds (2 minutes).

FIGURE 5-9: Step One

FIGURE 5-10: Step One

FIGURE 5-11: Step Two Heating

FIGURE 5-12: Step Two Cooling

AEHD Series Manual |

Desiccant Air Dryer User Manual

5.2.3 STEP THREE: Repressurizing

Vessel 2 is preparing for regeneration and Vessel 1 is drying

the inlet air.

The PLC control system energizes Solenoid SOL6, opening

purge exhaust valve K4.

Vessel 1 regeneration valve K3 and depressurization valve V1

should all be closed.

Depressurization valve V2 and Vessel 1 inlet valve K1 should

be open.

5.2.4 STEP FOUR: Extended Drying

Step 4 is the extended drying step, which is determined

by several features. Extended drying is controlled from the

controller menu screen.

On this screen, you can select either Energy Management or

Fixed Time Cycles. With Energy Management selected, the

unit has the ability to save energy when regenerating is not

needed. In Energy Management, the deciding factors are the

dew point setting and the relative humidity setting. These

can be changed on the Settings Screen. Once both values

have been met, the unit will go into savings mode labeled

Extended Drying.

FIGURE 5-13 Step Three FIGURE 5-15: Step Four

FIGURE 5-14: Step Three FIGURE 5-16: Step Four

| AEHD Series Manual

Desiccant Air Dryer User Manual

5.2.5 STEP FIVE: Depressurization

Step 1 is the depressurization step. In this step, Vessel 1

depressurizes to allow for regeneration of that tower. This

step is 120 seconds (2 minutes).

5.2.6 STEP SIX: Heating

Step 2 is the regeneration step. In this step, vessel 1 will

be heated then cooled to help regenerate the media. The

heating/cooling step is 235 minutes (3hrs, 55mins).

To advance from heating to cooling, press and hold the

up arrow button for approx. 6 seconds then release. If not

released within another 6 seconds, the cooling step will also

be skipped. To skip the cooling mode, press the up arrow

again for up to 12 seconds.

FIGURE 5-17: Step Five FIGURE 5-19: Step Six Heating

FIGURE 5-18: Step Five FIGURE 5-20: Step Six Cooling

AEHD Series Manual |

Desiccant Air Dryer User Manual

5.2.7 STEP SEVEN: Repressurization

Vessel 1 is preparing for regeneration and Vessel 2 is drying

the inlet air.

5.2.6 STEP EIGHT: Extended Drying

Step 8 is the extended drying step, which is determined

by several features. Extended drying is controlled from the

controller menu screen.

On this screen, you can select either Energy Management or

Fixed Time Cycles. With Energy Management selected, the

unit has the ability to save energy when regenerating is not

needed. In Energy Management, the deciding factors are the

dew point setting and the relative humidity setting. These

can be changed on the Settings Screen. Once both values

have been met, the unit will go into savings mode labeled

Extended Drying.

FIGURE 5-21: Step Seven FIGURE 5-23: Step Eight

FIGURE 5-22: Step Seven FIGURE 5-24: Step Eight

| AEHD Series Manual

Desiccant Air Dryer User Manual

5.3 Alarm Screens

5.3.1 No Alarm

No alarm is when there are no active alarms. During this

state, the alarm relay contact will be active. (Normally open

contact will be closed/normally closed contact will be open).

This allows the remote alarm to trip when power is lost to

the unit.

5.3.3 Failure to Shift

The fail to shift alarm trips if one of the vessels has not

re-pressurized, depressurized or has lost pressure during

any of the operations. Once the pressure has been restored,

the alarm will need to be manually reset to resume operation.

To do this, press the down arrow on the alarm screen.

5.3.2 High Purge Temperature

The high purge temp alarm trips when the heater outlet

temperature reaches 500°F. This causes the heater contactor

to kick out until the temperature drops down below the

alarm setting. Once the temperature comes back down, the

alarm must be reset to resume operation.

5.3.4 Heater High Limit

The heater high limit alarm trips when the heater sheath

temperature reaches 1000°F. Once the temperature falls

below the setting, the alarm will need to be manually reset

to resume operation. To do this, press the down arrow on

the alarm screen.

FIGURE 5-25: No Alarm

FIGURE 5-27: Failure to Shift

FIGURE 5-26: High Purge Temperature

FIGURE 5-28: Heater High Limit

AEHD Series Manual |

Desiccant Air Dryer User Manual

5.3.5 Bad RH Probe

The bad RH probe alarm trips when the Relative Humidity

sensor is out of range. This can be high (above 98%) or low

(below 1%). Once the probe has reached a number in the

range of the sensor, the alarm will automatically reset.

5.3.7 High Humidity

The high humidity alarm will trip when the dew point range is

higher than the high dew point setting on the settings screen.

Once the dew point falls below the setting, the alarm will

automatically reset.

5.3.6 Dew Point

The dew point probe alarm will trip when the sensor is out of

range. This can be high (above 67°F) or low (below -155°F).

Once the probe has reached a range that the sensor can

read, the alarm will automatically reset.

FIGURE 5-29: Bad RH Probe

FIGURE 5-31: High Humidity

FIGURE 5-30: Dew Point

| AEHD Series Manual

Desiccant Air Dryer User Manual

6.1 Introduction

To reach a field service technician or for technical support,

please call the number on the manual back cover.

6.2 Maintenance

Desiccant air dryers require regular maintenance for satisfactory

operation. Optimum performance can be expected if the

following routine maintenance steps are taken.

6.2.1 WEEKLY

• Check the operating conditions inlet flow, inlet temperature,

inlet pressure, and outlet dew point are in accordance with

system design parameters.

• Check all drain valves and separators.

• Check the pressure differential indicators (Delta-P) on the

pre-filter and after filter. If red or above 7 psi, replace the

filter elements. Verify the pre-filter drain is operating.

• For standard normal operation, verify the following settings:

• Control air pressure: 100 psig

• Purge air pressure: 50 - 55 psig

• EMS control setting: 7

• Verify the after-filter vent valve is closed and the inlet pre-

filter drain isolation ball valve is open.

• Verify the dew point sensor is achieving the correct dew

point and needle valves are set correctly, if applicable.

• Verify all temperature settings are correct.

• Verify no alarms are present. Refer to Section 5 for screen

shots and descriptions if necessary.

• Check mufflers. Clean or replace as needed. After first 2-3

weeks of operation, change the exhaust mufflers; after

that, replace as necessary.

• Verify EMS RH sensor needle is set correctly and exhausting

a slight amount of air to ambient.

6.2.2 SEMI-ANNUAL

• Repeat all weekly inspections and record data in the

Maintenance Log in this manual.

• Verify the system is operating properly in each sequence or

step of operation (Refer to Section 5 for more information)..

• Verify the operation of all pressure gauges, temperature

indicators, and outlet dew point sensor.

• Verify the system is free of leaks, fix any air leaks as needed.

• Remove and inspect all filters for excessive particulate

loading and physical damage. If required, replace elements

SECTION 6: MAINTENANCE

WARNING!

Electric Shock Hazard

Ensure power is disconnected from the dryer prior

to performing maintenance on the electrical or

mechanical system..

• Follow proper lock out/tag out procedures before

performing service or maintenance work.

• Prior to performing any maintenance on the dryer,

all personnel are strongly advised to familiarize

themselves with the equipment by reading the

entire contents of this operation manual.

• Follow all safety procedures prior to performing

any maintenance activity on the dryer.

CAUTION

If you notice anything unusual at any point during

the maintenance process, contact your Aircel

representative or the factory at once.

WARNING!

Refer to shutdown procedures for maintenance in

Section 3 prior to starting any maintenance on the

dryer system

AEHD Series Manual |

Desiccant Air Dryer User Manual

on pre-filters, after filters, and pilot air filters.

• Check desiccant condition. Powder in the mufflers is an

indication of the status of the desiccant.

• Check tightness of high and low voltage terminations.

• Check all solenoid valves - check valve seating, coil

condition, and control circuit.

6.2.3 ANNUAL

• Repeat all weekly and semi-annual inspections.

• Replace all filter elements including pre-filter, after filter,

and pilot air filter.

• Replace purge exhaust mufflers.

• Verify the operation of all pressure gauges and temperature

indicators.

• Verify system is leak-free

• Verify the system is operating properly in each sequence

or step of operation (refer to Section 5 for screen shots and

descriptions if necessary).

WARNING!

Power must be o and locked-out

| AEHD Series Manual

Desiccant Air Dryer User Manual

SECTION 7: TROUBLESHOOTING

7.1 Introduction

The following section briefly discusses the various faults that

can occur in the desiccant air dryer, the reason of the fault, and

how it can be rectified. If you do not find the solution to your

problem, contact your Aircel representative or the factory. All

necessary safety and precautionary steps must be followed

before attempting to perform any of the recommended

measures to resolve any faults in the air dryer.

If at any time, you notice anything unusual that can not be

resolved through this troubleshooting guide, contact your

Aircel representative or the factory at the phone number found

at the back of this manual.

Do not assume these are the only problems that may occur. All

available data concerning a problem should be systematically

analyzed before undertaking any repairs or component

replacement procedures.

WARNING!

Electric Shock Hazard

This machine is connected to high voltage power,

which can cause severe electrical shock and injury.

• Follow proper lock out/tag out procedures before

performing service or maintenance work.

• Prior to performing any maintenance on the dryer,

all personnel are strongly advised to familiarize

themselves with the equipment by reading the

entire contents of this operation manual.

• Follow all safety procedures prior to performing

any maintenance activity on the dryer.

• Some troubleshooting may have to be done while

system is pressurized and energized. Use extreme

caution.

WARNING!

Pressure Hazard

This machine contains contents under low to medium

pressure, which can cause injury.

• To avoid possible hazard or injury, the operator

should be fully familiar with the refrigerated dryer

system and its operation.

• When the system is shutdown and power removed,

lock out power supply and depressurize system

before performing maintenance or service work

to avoid injury to personnel or property damage.

CAUTION

Inappropriate Tools Hazard

Using inappropriate tools for installation or

maintenance work can lead to personal injury or

property damage.

Appropriate tools must be used for all installation and

maintenance work.

WARNING!

In addition to the below notes and warnings,

refer to general safety procedures, safe operating

procedures, and any safety procedures required by

end user.

AEHD Series Manual |

Desiccant Air Dryer User Manual

7.2 AEHD Series Troubleshooting Guide

Problem Probable Cause Remedy

High Dew Point

High inlet air ow • Reduce inlet air ow

Inlet air temperature above design

specication

• Reduce inlet air temperature to design specication

Poor inlet pre-ltration • Check pre-lter element(s); replace as needed

Inlet air pressure below design

specication

• Increase pressure to dryer

Purge ow shut o or not properly

adjusted

• Set purge ow to correct setting using purge adjustment valve

Back pressure in regenerating

chambers

• Muer(s) are clogged, install new muer(s). Desiccant bed

screen(s) are clogged, clean screens.

Inlet pre-lter drain not working • Clean or replace drain

Exhaust valve(s) not fully opening or

closing

• Clean and/or replace exhaust valve or actuator

Outlet check valve leaking • Clean and/or replace check valve

Purge check valve leaking • Clean and/or replace check valve

Low heater temperature or heater not

working

• Check heater temperature controller; adjust if necessary.

Check thermocouples.

Check PLC.

Check fuses.

Adjust purge adjustment valve if needed.

High Pressure

Drop

High inlet ow rate • Reduce inlet ow rate to meet dryer specication

Inlet pre-lter dirty • Inspect and replace as needed

Low inlet pressure • Increase inlet pressure to design specication

Desiccant dusting • High inlet ow velocities due to high ow

| AEHD Series Manual

Desiccant Air Dryer User Manual

APPENDIX A: SPECIFICATIONS

A.1 Dryer specifications - AEHD Series

For dimensions, weights, and connection sizes, see the drawing of the dryer model provided at purchase.

Type of dryer: Desiccant

Power supply: 460 VAC, 3 Ph, 60 Hz

Desiccant type: Premium grade activated alumina

AEHD Series Manual |

Desiccant Air Dryer User Manual

APPENDIX B: MATERIAL SAFETY DATA SHEETS

Composition/information on ingredients

CAS Number

Content (W/W)

Chemical name

1333-84-2

>= 94.0 - <= 100.0 %

Aluminum oxide (Al2O3), hydrate

Hazard identification

Emergency overview

CAUTION: MAY CAUSE EYE, SKIN AND RESPIRATORY TRACT IRRITATION

May cause difficulty breathing

Prolonged or repeated contact may result in dermatitis

Contact with the eyes or skin may cause mechanical irritation

Contains material which may indicate/cause the possibility of sensory and pulmonary irritation

Avoid contact with the skin, eyes and clothing

Avoid inhalation of dusts

Use with local exhaust ventilation

Wear a NIOSH-certified (or equivalent) particulate respirator

Wear safety glasses with side-shields

Wear chemical resistant protective gloves

Wear protective clothing

Eye wash fountains and safety showers must be easily accessible

Potential health effects

Primary routes of exposure

Routes of entry for solids and liquids include eye and skin contact, ingestion and inhalation

. Routes of entry for

gases include inhalation and eye contact

Skin contact may be a route of entry for liquified gases

First-aid measures

If inhaled:

Keep patient calm, remove to fresh air

If necessary, give oxygen

If not breathing, give artificial respiration

Seek medical attention if necessary

Page: 1/5

(30286124/MDS_GEN_US/EN)

Company

BASF CORPORATION

100 Campus Drive

Florham Park, NJ 07932, USA

Safety data sheet

F200

Revision date : 2009/12/04

Version: 3.0

Substance/preparation and company identification

24 Hour Emergency Response Information

CHEMTREC: 1-800-424-9300

BASF HOTLINE: 1-800-832-HELP

B.1 Activated Alumina Desiccant

| AEHD Series Manual

Desiccant Air Dryer User Manual

C.1 Activated Alumina Desiccant

Accidental release measures

Cleanup:

Vacuum up spilled product

Place into suitable container for disposal

Handling and storage

Handling

General advice:

Avoid dust formation in confined areas

Avoid contact with the skin, eyes and clothing

Ensure adequate

ventilation

Storage

General advice:

Keep container tightly closed in a cool, well-ventilated place

Storage stability:

Keep container dry.

Exposure controls and personal protection

Components with workplace control parameters

Aluminum oxide (Al2O3),

OSHA

PEL 5 mg/m3 Respirable fraction ; PEL 15 mg/m3 Total

hydrate

dust ;

ACGIH

TWA value 1 mg/m3 Respirable fraction ;

Safety data sheet

F200

Revision date : 2008/12/04

Version: 3.0

Page: 2/5

(30286124/MDS_GEN_US/EN)

If on skin:

After contact with skin, wash immediately with plenty of water and soap

Consult a doctor if skin irritation

persists

If in eyes:

In case of contact with the eyes, rinse immediately for at least 15 minutes with plenty of water

Immediate

medical attention required

If swallowed:

No hazards anticipated

If large quantities are ingested, seek medical advice.

Fire-fighting measures

Flash point:

Additional information:

Use extinguishing measures to suit surroundings

Hazards during fire-fighting:

No particular hazards known

Non-flammable.

Protective equipment for fire-fighting:

Wear self-contained breathing apparatus and chemical-protective clothing

NFPA Hazard codes:

Health : 0 Fire: 0

Reactivity: 1

Special:

AEHD Series Manual |

Desiccant Air Dryer User Manual

C.1 Activated Alumina Desiccant

Advice on system design:

Provide local exhaust ventilation to control dust

Provide local exhaust ventilation to maintain recommended

P.E.L

Personal protective equipment

Respiratory protection:

Wear a NIOSH-certified (or equivalent) particulate respirator

Observe OSHA regulations for respirator use (29

CFR 1910.134)

Wear appropriate certified respirator when exposure limits may be exceeded

Hand protection:

Wear chemical resistant protective gloves., Consult with glove manufacturer for testing data

Eye protection:

Safety glasses with side-shields

Body protection:

Body protection must be chosen based on level of activity and exposure

Physical and chemical properties

Safety data sheet

F200

Revision date : 2008/12/04

Version: 3.0

Page: 3/5

(30286124/MDS_GEN_US/EN)

Form:

Odour:

Colour:

pH value:

Melting point:

Boiling point:

Vapour pressure:

Density:

Bulk density:

Partitioning coefficient

n-octanol/water (log Pow):

Viscosity, dynamic:

Solubility in water:

Stability and reactivity

powder, granules, pellets, balls

odourless

off-white

9.4 - 10.1

2,050 °C

No data available

approx

650 kg/m3

38.0 - 52 lb/ft3

( 68 °F)

No data available

insoluble

Substances to avoid:

water

Hazardous reactions:

The product is chemically stable

Addition of water leads to increase in temperature

Toxicological information

Oral:

Information on: Aluminum oxide

LD50/rat: > 5,000 mg/kg (OECD Guideline 401)

----------------------------------

| AEHD Series Manual

Desiccant Air Dryer User Manual

C.1 R-134a Refrigerant

June 10, 2015 (rev. 1)

SAFETY DATA SHEET R-134a

7. HANDLING AND STORAGE

NORMAL HANDLING: Always wear recommended personal protective equipment.

Avoid breathing vapors and liquid contact with eyes, skin or clothing. Do not puncture or drop cylinders, expose

them to open flame or excessive heat. Use authorized cylinders only. Follow standard safety precautions for

handling and use of compressed gas cylinders. R-134A should not be mixed with air above atmospheric pressure

for leak testing or any other purpose.

STORAGE RECOMMENDATIONS:

Store in a cool, well-ventilated area of low fire risk and keep out of direct sunlight. Protect cylinder and its fittings

from physical damage. Storage in subsurface locations should be avoided. Close valve tightly after use and when

empty. Cylinder temperatures should not exceed 52° C (125° F).

8. EXPOSURE CONTROLS / PERSONAL PROTECTION

ENGINEERING CONTROLS: Provide local ventilation at filling zones and areas where leakage is probable.

Mechanical (general) ventilation may be adequate for other operating and storage areas.

PERSONAL PROTECTIVE EQUIPMENT

SKIN PROTECTION: Skin contact with refrigerant may cause frostbite. General work clothing and

gloves (leather) should provide adequate protection. If prolonged contact with the liquid or gas is

anticipated, insulated gloves constructed of PVA, neoprene or butyl rubber should be used. Any

contaminated clothing should be promptly removed and washed before reuse.

EYE PROTECTION: For normal conditions, wear safety glasses. Where there is reasonable

probability of liquid contact, wear chemical safety goggles.

RESPIRATORY PROTECTION: None generally required for adequately ventilated work situations.

For accidental release or non-ventilated situations, or release into confined space, where the concentration

may be above the PEL of 1,000 ppm, use a self-contained, NIOSH- approved breathing apparatus or

supplied air respirator. For escape: use the former or a NIOSH-approved gas mask with organic vapor

canister.

ADDITIONAL RECOMMENDATIONS: Where contact with liquid is likely, such as in a spill or leak,

impervious boots and clothing should be worn. High dose-level warning signs are recommended for areas

of principle exposure. Provide eyewash stations and quick-drench shower facilities at convenient locations.

For tank cleaning operations, see OSHA regulations, 29 CFR 1910.132 and 29 CFR 1910.133.

EXPOSURE GUIDELINES

INGREDIENT NAME

ACGIH TLV OSHA PEL OTHER LIMIT

1,1,1,2-Tetrafluoroethane None None *1000 ppm TWA (8hr)

* = Workplace Environmental Exposure Level (AIHA)

OTHER EXPOSURE LIMITS FOR POTENTIAL DECOMPOSITION PRODUCTS:

Hydrogen Fluoride: ACGIH TLV: 3 ppm ceiling

AEHD Series Manual |

Desiccant Air Dryer User Manual

C.1 R-134a Refrigerant

June 10, 2015 (rev. 1)

SAFETY DATA SHEET R-134a

9. PHYSICAL AND CHEMICAL PROPERTIES

APPEARANCE: Clear, colorless liquified gas

ODOR: Slight ethereal

PHYSICAL STATE: liquified gas

BOILING POINT (@ 736 mm Hg): F: -15.7

C: -26.5

VAPOR PRESSURE (psia): 96 @ 77F (25C)

VAPOR DENSITY (AIR = 1): 3.6 @ 77F (25C)

SPECIFIC GRAVITY (H2O = 1): 1.208 @ 77F (25C)

EVAPORATION RATE (CCL4 =1): >1

SOLUBILITY IN WATER (@14.7 psia): 0.15 WT% @ 77F (25C)

PERCENT SOLIDS BY WEIGHT: Gas

PERCENT VOLATILE: 100% By Wt

VOLATILE ORGANIC COMPOUNDS (VOC): Gas

10. STABILITY AND REACTIVITY

NORMALLY STABLE (CONDITIONS TO AVOID):

The product is stable.

Do not mix with oxygen or air above atmospheric pressure. Any source of high temperature, such as lighted

cigarettes, flames, hot spots or welding may yield toxic and/or corrosive decomposition products.

INCOMPATIBILITIES:

Under specific conditions: e.g. very high temperatures and/or appropriate pressures – Freshly abraded aluminum

surfaces may cause strong exothermic reaction. Chemically active metals: potassium, calcium, powdered aluminum,

magnesium and zinc.

HAZARDOUS DECOMPOSITION PRODUCTS:

Halogens, halogen acids and possibly carbonyl halides. These materials are toxic and irritating.

HAZARDOUS POLYMERIZATION:

Will not occur.

11. TOXICOLOGICAL INFORMATION

IMMEDIATE (ACUTE) EFFECTS:

50 : 4 hr. (rat) - > 500,000 ppm / Cardiac Sensitization threshold (dog) > 80,000 ppm

DELAYED (SUBCHRONIC AND CHRONIC) EFFECTS:

Teratogenic NOEL(rate and rabbit) – 40,000 ppm

Subchronic inhalation NOEL (rat) - 50,000 ppm / Chronic NOEL – 10,000 ppm

OTHER DATA:

Not active in four genetic studies

Toxicity to reproduction: Did not show mutagenic or teratogenic effects in animal experiments

| AEHD Series Manual

Desiccant Air Dryer User Manual

C.1 Activated Alumina Desiccant

Information on: Aluminum oxide

Acute and prolonged toxicity to fish:

DIN 38412 Part 15 static

golden orfe/LC50 (96 h): > 500 mg/l

The product has not been tested

The statement has been derived from products of a similar structure and

composition

----------------------------------

Information on: Aluminum oxide

Acute toxicity to aquatic invertebrates:

OECD Guideline 202, part 1 static

Daphnia magna (48 h): > 100 mg/l

----------------------------------

Disposal considerations

Waste disposal of substance:

Dispose of in accordance with local authority regulations

Check for possible recycling

Disposal requirements are dependent on the hazard classification and will vary by location and the type of

disposal selected

All waste materials should be reviewed to determine the applicable hazards (testing may be necessary)

Transport information

Land transport

USDOT

Not classified as a dangerous good under transport regulations

Sea transport

IMDG

Not classified as a dangerous good under transport regulations

Air transport

IATA/ICAO

Not classified as a dangerous good under transport regulations

Regulatory information

Federal Regulations

Safety data sheet

F200

Revision date : 2008/12/04

Version: 3.0

Skin irritation:

Information on: Aluminum oxide

rabbit: non-irritant (OECD Guideline 404)

----------------------------------

Ecological information

Page: 4/5

(30286124/MDS_GEN_US/EN)

AEHD Series Manual |

Desiccant Air Dryer User Manual

C.1 Activated Alumina Desiccant

HMIS uses a numbering scale ranging from 0 to 4 to indicate the degree of hazard

A value of zero means that the substance

possesses essentially no hazard; a rating of four indicates high hazard

Local contact information

[email protected]

IMPORTANT: WHILE THE DESCRIPTIONS, DESIGNS, DATA AND INFORMATION CONTAINED HEREIN

ARE PRESENTED IN GOOD FAITH AND BELIEVED TO BE ACCURATE , IT IS PROVIDED FOR YOUR

GUIDANCE ONLY

BECAUSE MANY FACTORS MAY AFFECT PROCESSING OR APPLICATION/USE, WE

RECOMMEND THAT YOU MAKE TESTS TO DETERMINE THE SUITABILITY OF A PRODUCT FOR YOUR

PARTICULAR PURPOSE PRIOR TO USE

NO WARRANTIES OF ANY KIND, EITHER EXPRESSED OR

IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE, ARE MADE REGARDING PRODUCTS DESCRIBED OR DESIGNS, DATA OR INFORMATION

SET FORTH, OR THAT THE PRODUCTS, DESIGNS, DATA OR INFORMATION MAY BE USED WITHOUT

INFRINGING THE INTELLECTUAL PROPERTY RIGHTS OF OTHERS

IN NO CASE SHALL THE

DESCRIPTIONS, INFORMATION, DATA OR DESIGNS PROVIDED BE CONSIDERED A PART OF OUR

TERMS AND CONDITIONS OF SALE

FURTHER, YOU EXPRESSLY UNDERSTAND AND AGREE THAT

THE DESCRIPTIONS, DESIGNS, DATA, AND INFORMATION FURNISHED BY BASF HEREUNDER ARE

GIVEN GRATIS AND BASF ASSUMES NO OBLIGATION OR LIABILITY FOR THE DESCRIPTION,

DESIGNS, DATA AND INFORMATION GIVEN OR RESULTS OBTAINED, ALL SUCH BEING GIVEN AND

ACCEPTED AT YOUR RISK

END OF DATA SHEET

Safety data sheet

F200

Revision date : 2008/12/04

Version: 3.0

Registration status:

TSCA, US

OSHA hazard category:

Page: 5/5

(30286124/MDS_GEN_US/EN)

State RTK

MA, NJ, PA

released / listed

ACGIH TLV established

SARA hazard categories (EPCRA 311/312):

Acute

SARA 313:

CAS Number

1333-84-2

State regulations

State RTK

CAS Number

1333-84-2

Chemical name

Aluminum oxide (Al2O3), hydrate

Chemical name

Aluminum oxide (Al2O3), hydrate

Other information

HMIS III rating

Health: 1

Flammability: 0 Physical hazard:

| AEHD Series Manual

Desiccant Air Dryer User Manual

DATE SERVICE PERFORMED NOTES

NOTES

AEHD Series Manual |

Desiccant Air Dryer User Manual

DATE SERVICE PERFORMED NOTES

NOTES

| AEHD Series Manual

Desiccant Air Dryer User Manual

DATE SERVICE PERFORMED NOTES

NOTES

AEHD Series Manual |

Desiccant Air Dryer User Manual

DATE SERVICE PERFORMED NOTES

NOTES

| AEHD Series Manual

Desiccant Air Dryer User Manual

DATE SERVICE PERFORMED NOTES

NOTES

AEHD Series Manual |

Desiccant Air Dryer User Manual

WARRANTY INFORMATION

Aircel warrants that its Standard Refrigerated Air Dryers are

free from defects in materials and workmanship for two

years from the date of invoice. Warranty coverage for this

time period will be parts and labor for the rst year and parts

only for the second. Custom engineered products, desiccant

dryers, chillers and nitrogen generators are warranted to be

free from defects in materials and workmanship for one year

from date of invoice. Warranty coverage for this time period

will be for parts and labor.

Aircel warranty excludes damages due to corrosion, lack of

proper maintenance, incorrect installation, modication,

or misapplication of equipment. Routine maintenance or

adjustment required under normal operation as outlined

in the Aircel operation and maintenance manuals are not

covered under warranty.

Once Aircel has been given adequate opportunity to remedy

any defects in material or workmanship in accordance with

Aircel Warranty Policy and Procedures, Aircel retains the sole

option to accept return of the goods, with freight paid by the

purchaser, and to refund the purchase price for the goods

after conrming the goods are returned undamaged and in

usable condition. Such a refund will be the full extent of Aircel

liability. Aircel shall not be liable for any other costs, expenses

or damages whether direct, indirect, special, incidental,

consequential or otherwise. The terms of this warranty may

be modied only by a special warranty document signed by a

CEO, General Manager or Vice President of Aircel.

There exist no other representations, warranties or guarantees

except as stated in this paragraph and all other warranties,

including merchantability and tness for a particular purpose

whether express or implied, are hereby expressly excluded

and disclaimed.

Parts & Service

For genuine Aircel replacement parts, call

800.767.4599

For faster service, please have your unit model

and serial number, part number, or description.

Aircel LLC | 323 Crisp Circle | Maryville, TN 37801 | 865.767.4599 | airceldryers.com