APET PET High Pressure Refrigerated Air Dryer User Guide

APET Series | High Pressure | 45 - 1,000 scfm

225, 500, and 725 psig

REFRIGERATED DRYER USER MANUAL

The information in this manual is current as of its publication date and applies to VF, DHT, and AES Series refrigerated 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.

| APET Series Manual

Refrigerated 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:

APET Series Manual |

Refrigerated 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 Refrigerant Safety Precautions 1

1.4.1 Inhalation, Skin, & Eye Irritant 1

1.4.2 Refrigerant First Aid Recommendations 2

1.5 Implementation of lockout/tagout 2

1.5.1 Procedures 2

1.5.2 General Security 3

Section 2: Description 4

2.1 Introduction 4

2.2 System 4

2.3 Refrigeration Circuit 4

2.3.1 Types of Refrigerant Used 4

2.4 Compressed Air Circuit 5

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

3.4.1 Air-Cooled Condenser Requirements 8

3.4.2 Cooling Water Requirements 9

3.5 Preliminary Start-Up Checklist 10

3.6 Automatic Drain Valve Adjustments 11

Section 4: Operation 12

4.1 Operating Procedures 12

4.2 Short-Term Shut Down 12

4.3 Shut Down Emergency 12

Section 5: Maintenance 13

5.1 Introduction 13

5.2 Maintenance 13

5.2.1 Daily 13

5.2.2 Weekly 13

5.3 Filter Element Replacement 14

Section 6: Troubleshooting 15

6.1 Introduction 15

6.2 Electrical 16

6.3 Refrigeration 16

6.4 Condensate Removal 17

6.5 Other 18

6.6 APET Series Troubleshooting Guide 19

Appendix A: Specifications 24

A.1 Table of Specifications - APET Series 24

Appendix B: Wiring Diagrams 25

B.1 APET Series 25

Appendix C: Material Safety Data Sheets 28

C.1 R-134a 28

Service Notes 35

Warranty Information 39

APET Series Manual |

Refrigerated Air Dryer User Manual

1.1 Introduction

To ensure maximum performance and safe operation of an

Aircel refrigerated 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.

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

• Improper installation, operation, or maintenance may

contribute to conditions in the work area or facility that

could result in personal injury and product or property

damage. Check that all equipment is properly selected

and sized for the intended use.

• Consult and comply with national and local codes

relating to fire or explosion and all other appropriate

codes when determining the location and operation of

this equipment.

• 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, NFPA No.

70-latest edition.

• A qualified installation and service agent must complete

installation and service of this equipment.

• DO NOT weld on / to pressure vessel or modify it in any

way.

• DO NOT remove, modify, or adjust protective or safety

devices.

• Lock out power supply and depressurize system before

performing maintenance or service work.

• DO NOT operate the equipment with the control panel

door open.

1.4 Refrigerant Safety Precautions

1.4.1 INHALATION, SKIN, & EYE IRRITANT:

• Use proper safety and protective equipment, including

chemical safety goggles or face shield and impervious

gloves when handling refrigerants.

• Exercise care to ensure that liquid refrigerant does not

come in contact with your skin or eyes.

• DO NOT SMOKE.

• Ventilation in work area must be adequate to keep the

concentration of refrigerant below 1,000 ppm.

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.

NOTICE

For optimum performance, use only Aircel replacement

parts.

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Refrigerated Air Dryer User Manual

• System must be free of all refrigerant before any welding

or brazing can be performed and must be done in a well

ventilated area.

• Decomposition of refrigerants is hazardous! This material

can be decomposed by high temperatures caused by

an open flame. Hydrofluoric acid and possibly carbonyl

fluoride can form in a liquid or gaseous state. Avoid

exposure to these toxic fumes and irritating materials.

• Leave the work area immediately if you experience any of

the following: smell something unusual, feel light-headed,

experience shortness of breath, feel a tingling sensation

in your fingers or toes, suddenly feel warm or a rapid

heartbeat.

1.4.2 REFRIGERANT FIRST AID RECOMMENDATIONS

1.4.2.1 INHALATION

If high concentrations are inhaled, immediately remove

individual from aected area to an area with a fresh air supply.

Keep individual calm. If not breathing, give articial respiration

or if having diculty breathing, give oxygen and call for

emergency services.

1.4.2.2 SKIN CONTACT

In case of contact with the skin, immediately flush skin with clean

water for at least 15 minutes. Treat for frostbite if necessary by

gently warming affected areas and call for emergency services.

Remove any contaminated clothing or shoes.

1.4.2.3 EYE CONTACT

In case of contact with the eyes, immediately flush eye(s) with

clean water for at least 15 minutes and call for emergency

services.

1.5 Implementation of lockout/tagout

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

out by each employee doing the work except when motion is

necessary during setup, adjustment, or troubleshooting.

1.5.1 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 requried 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. Taglock devices shall be used only when power sources

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

APET Series Manual |

Refrigerated Air Dryer User Manual

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.

1.5.2 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.

| APET Series Manual

Refrigerated Air Dryer User Manual

2.1 Introduction

Refrigerated air dryers are designed to remove moisture

from compressed air by use of mechanical refrigeration

and are used to protect industrial compressed air systems,

machinery, and tools. They are designed to deliver the

required dew point at specified inlet air temperature,

inlet air pressure, inlet flow, and ambient temperature

conditions.

2.2 System

The APET Series refrigerated air dryer products cover

the flow range and pressures listed on the manual front

cover and provide reliable dew point performance in all

flow conditions. Through optimization of critical dryer

components – heat exchanger, separator, and condensate

removal – the system ensures the highest performance at

full- and partial load conditions.

Hot saturated air enters the air-to-air heat exchanger of the

refrigerated air dryer and is pre-cooled by the outgoing dry

air. Pre-cooling saves energy by reducing the heat load on

the dryer’s compressor. The cool saturated air enters the

air-to-refrigerant heat exchanger where air temperature is

lowered to the 38 to 42°F range. This dramatic temperature

drop condenses water and oil.

The mixture of cold air and condensation then flows into the

two-stage separator filter where liquids and contaminants

are removed by centrifugal action, directional flow change,

and velocity reduction. Once bulk liquids have been

removed, the compressed air goes through a stainless steel

mist eliminating filter that coalesces oil aerosols and oil

vapors within the 50-micron range, and then separates and

removes them. At this point, the compressed air is dry and

virtually oil-free.

Cold, dry air exits through the pre-cooler heat exchanger

and is reheated by incoming hot air. Reheating restores

energy and also prevents condensation from forming on

the outside of air distribution piping. In the refrigeration

unit, the compressor pumps hot, high-pressure gaseous

refrigerant to the condenser where it is cooled and liquefied

by ambient air. From the condenser, liquid refrigerant first

flows through the receiver, then through a filter/dryer, and

finally through the expansion valve where pressure and

temperature are reduced. This reduction in pressure causes

the liquid refrigerant to boil until it reaches the saturation

temperature that corresponds to its pressure. As the low-

pressure refrigerant passes through the evaporator, heat

flows from the compressed air to the refrigerant, causing

the boiling to continue until all refrigerant is vaporized.

Refrigerant gas is returned to the compressor and the cycle

is repeated.

In the VF and DHT Series dryers, a hot gas by-pass valve is

used to control temperature in the evaporator. In the AES

Series, the Copeland Scroll Digital™ compressor allows the

system to eliminate the need for a hot gas by-pass valve.

The closed loop digital controller continuously monitors the

evaporator temperature and modulates the loading and

unloading of the refrigeration compressor based on current

load conditions.

2.3 Refrigeration Circuit

Refrigerant is cycled through a closed loop system commonly

known as high pressure and low pressure. Refrigerant

is compressed by the compressor to a gas with high

temperature and high pressure, which then travels to the

condenser (air- or water-cooled) to lower the temperature

and condense the gas into a liquid. Liquid travels to the

evaporator (refrigerant-to-air part of the heat exchanger)

and back to the compressor suction side. The process then

repeats. A hot gas by-pass valve is used on the non-cycling

VF Series dryers as a freeze protector in low load conditions

(100 scfm rated models [1/2 Hp] and up).

2.3.1 TYPES OF REFRIGERANT USED

R-134a refrigerant is used throughout the APET dryer range.

R-134a is a pure refrigerant providing consistent

performance (zero temperature glide) and easy service (no

mixture of different refrigerants).

SECTION 2: DESCRIPTION

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Refrigerated Air Dryer User Manual

2.4 Compressed Air Circuit

The compressed air dryer circuit uses a patented air-to-air

heat exchanger. These heat exchangers act as a pre-cooler/

reheater. Hot, saturated, compressed air first enters the air-to-

air heat exchanger, where it is pre-cooled by outgoing air from

the air-to-refrigerant heat exchanger. This energy saving heat

exchanger provides several advantages, such as a reduction

of the heat load imposed on the refrigerant compressor

and condenser, providing more energy to the outlet air, and

preventing condensation of moisture on the outside of the

plant distribution air line piping. From the air-to-air heat

exchanger, air will enter into the evaporator further reducing

its temperature to a desired pressure dew point. As the air

is cooled, moisture is condensed, separated, and discharged

through the condensate drain. The cooled air then reenters

the air-to-air heat exchanger, in a direction opposite to the flow

of the warm, saturated incoming air. This counter flow action

assures high temperature differential throughout the heat

exchanger, resulting in a more effective heat transfer.

Condenser

Compressor

Expansion Valve

Separator

Pre-Cooler/Re-heater Air to Refrigerant

Drain

Refrigerant

Out

Refrigerant

Air In

Air Out

FIGURE 2-1: TYPICAL SCHEMATIC FLOW DIAGRAM

APET Series 45 - 1,000 scfm rated models

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Refrigerated Air Dryer User Manual

3.1 Inspection on Arrival

All non-cycling refrigerated air dryers are tested and operated

before shipment. However, shipping stresses have the potential

to cause damage to the unit. To ensure smooth installation, it

is recommended that immediately upon receipt of the unit, the

system is checked for the following:

1. Report any damage to the delivery carrier.

2. Request a written inspection report from the Claims

Inspector to substantiate the claim.

3. File claims with the delivery carrier.

4. 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.

5. Shipping stresses can loosen connections. All pipe and

tubing connections should be inspected.

6. Observe pressure of refrigerant suctions gauge to

determine if refrigerant has leaked during transit. If the

gauge reading does not match that mentioned on the

serial plate label, immediately contact Technical Support

listed on the manual back cover.

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 hand cart, forklift, or crane is recommended for

unloading and installation.

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

by piping.

APET Series Manual |

Refrigerated 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.

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.

2. Install unit to provide adequate clearance for maintenance

services. Dryer and accompanying filters should be installed

with at least 2 to 5 feet clearance from the adjoining walls

to provide easy access for routine maintenance and

adequate air flow across the condensing coil.

3. The frame or cabinet must be securely bolted to the

foundation to prevent movement resulting from earth

tremors and induced piping vibration.

4. Install unit using the correct pipe size and pressure rating.

See drawing package provided with the unit. Connect the

inlet of the dryer to the moist gas from the inlet filter.

Install the inlet piping and the inlet shutoff valve. Install the

outlet piping and the outlet shutoff valve (a union with a

valve by-pass can be installed at the inlet and outlet valves

to accommodate isolation of the dryer for maintenance).

Compressed air piping has to be at least the same size as

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

pipe sizes can be used with appropriately rated reducers.

5. Optional system configuration: Install a dryer bypass or

isolation valve to allow isolation of the dryer for service and

maintenance without interrupting the compressed air flow.

6. Minimum recommended filtration: Install an Aircel inline

compressed air particulate pre-filter before the dryer to

protect it against dirt and possible clogging of the heat

exchanger.

7. Additional recommended filtration: Install an Aircel inline

compressed air coalescing after filter after the dryer.

8. Provide adequate power supply. See Section A: Specifications.

Make all electrical connections to the dryer 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. Three phase units are equipped with

a phase monitor, which will prevent unit from operating

when wired in reverse. It is mandatory that the dryer be

grounded. Use of your plant’s frame as a ground may

cause problems with the controls. A fused disconnect is

not supplied with this equipment; therefore, one must be

supplied by customer. All electrical fuses, breakers, etc.

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.

WARNING!

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

matinenance work.

WARNING!

Pressure and temperature hazards

Operation at elevated pressure or temperature

may cause damage to the dryer or serious injury to

personnel.

Each dryer is checked at the factory for proper

operation at the conditions noted on the serial plate

label.

| APET Series Manual

Refrigerated Air Dryer User Manual

should be sized by a qualified electrician and comply with

all applicable national and local codes. Our company is

not liable for any code violations, component damage,

downtime or consequential damage related to customer

supplied electrical components and connections.

9. The ambient temperature should be between 40 °F and

100 °F. Low temperature could affect the dryer process

and result in high outlet dew point. In conditions where

the ambient drops below freezing, it is recommended that

a heat trace be used for the equipment. This will ensure

trouble-free operation during the winter months (the dew

point of the outlet air will be consistent).

• In some cases, a head pressure control valve may be

needed. (Optional)

10. Do not place the system in service until the above steps

have been completed and that all ratings and specifications

have been verified to match the requirements in the

drawing package supplied with the unit.

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

the system from those published in this manual, contact

Technical Support.

3.4.1 AIR-COOLED CONDENSER REQUIREMENTS

Cooling air must be drawn from a clean source to reduce dust

and dirt accumulation on the condenser coils. Air temperature

should not exceed 100°F (38°C).

Drain

Valve

Air or Water

Cooled

Condenser

Air

Compressor

Drain

Valve

Dry Air

to Plant

Drain

Valve

Refrigerated Dryer

After Filter

Pre-Filter

Wet Receiver

(optional)

Dry Receiver

(optional)

Separator

Drain

Valve

FIGURE 3-1: Typical Installation Setup

Model by SCFM

Rating Refrigeration HP

Cooling Air Flow

(cfm)

45 0.20 275

65 0.25 300

80 0.33 300

125 0.50 350

200 0.75 525

260 1.25 750

415 1.50 1,250

570 2 3,000

860 3.50 3,000

1,000 5 5,000

TABLE 3-1: Air-Cooled Cooling Air Flow -

APET Series

APET Series Manual |

Refrigerated Air Dryer User Manual

Incoming Water Flow Rate Requirements

(in gpm at dierent inlet water temperature)

Model by SCFM

Rating Condenser HP 70°F 80°F 85°F 90°F

65 0.25 1 1.25 1.5 C/F

80 0.33 1.5 1.9 2.25 C/F

125 0.5 2 2.5 3 C/F

200 0.75 3 3.75 4.5 C/F

260 1.25 4 5 6 C/F

415 1.5 7 8.75 10.5 C/F

570 2 10 12.5 15 C/F

860 3.5 12 15 18 C/F

1,000 5 14 17 20 C/F

TABLE 3-2: Water-Cooled Water Flow Requirements- APET Series

3.4.2 COOLING WATER REQUIREMENTS (WATER-

COOLED CONDENSING UNITS)

Cooling water is required for water-cooled refrigerant

condensers (scfm rated model 100 and up). The user is

responsible for piping the water to and from the condenser.

The required water flow rate depends on the water

temperature. A water-regulating valve (supplied with the dryer)

automatically adjusts the flow to compensate for variation in

water temperature, water pressure, and dryer air load. The

table below indicates the amount of cooling water required in

gallons per minute (gpm) at given incoming temperatures for

the condenser Hp size in each model. The refrigerant discharge

pressure control will shut down the refrigerant compressor if

cooling is inadequate.

NOTICE:

• Water cooled condensers are pre-set at the factory for city

water usage.

• Water regulating valve may need to be adjusted to other

water supply conditions. Contact technical support for

assistance.

• Minimum water pressure is 25 psig for city water and 35

psig for tower water. Cooling water pressures less than

these minimums may reduce dryer drying capacity.

• Maximum water pressure is 125 – 150 psig.

| APET Series Manual

Refrigerated Air Dryer User Manual

3.5 Preliminary Start-Up Checklist

1. Check that the inlet and outlet connections are the correct

size and pressure rating, and tightened securely.

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

non-cycling refrigerated air dryer system with an adequate

disconnect switch.

3. Check that all compressed air line service valves are open

and that compressed air is available to be supplied to the

non-cycling refrigerated air dryer system.

4. Check that all liquid drain service valves are open. This is

to ensure that any residual bulk condensate that may have

accumulated in the compressed air lines is discharged

immediately upon start up. These drains must be closed

once system is brought on line for use. The drain valve on

the refrigerated air dryer can be opened by pushing the

test button located on the drain body.

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

OPEN the inlet valve slowly 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.

6. Check the air system piping connections and dryer system

connections for leaks at this time. Repair and retest any

leaks.

7. Verify that all instrumentation (pressure gauge/s) and

drain air tubing fittings are tight.

8. Ensure that the air system has come up to full pressure and

has filled the dryer with compressed air. Before opening

the outlet valve on the system and after the dryer has been

started under no load, let the dryer run for at least fifteen

(15) minutes to allow stabilization of the system. Verify the

following:

a. The dryer is designed to run continually and should

not be cycling on and off with the air compressor. The

non-cycling operation of the dryer is controlled by an

automatic expansion valve or a thermostatic expansion

valve / hot gas by-pass valve. The valves will open and

close automatically depending on the of heat load to

the evaporator, thus maintaining the desired pressure

dew point.

b. Check the inlet compressed air temperature and

pressure to the dryer and verify that it meets the

specified requirements.

c. Fan rotation, for dryers with an air-cooled condenser,

rotation should be in accordance with the fan rotation

shown on the details located on top and back of the

condenser. Cooling air is drawn through the condenser

coils. Three phase units are equipped with three phase

monitors, which will prevent the fan(s) and compressor

from running backwards. The unit will not turn on

unless the wire leads are in the correct location. The

phase monitor, located in the electrical box, will display

a green light, when the unit is phased properly. A red

light indicates that the unit is not phased properly. If the

motor rotation is not correct, turn off the power switch

and put the main power supply disconnect in the “off”

position; lock and tag; check the wiring; correct the wire

lead locations; recheck for correct phasing.

d. The refrigeration gauge readings should be as follows:

• Refrigerant suction pressure

R-134a = 28-40 psig 

• Refrigerant discharge pressure

R-134a = 160-230 psig

9. After the preliminary start up checklist has been completed,

the compressed air outlet valve on the dryer system can

now be slowly opened to supply clean dry compressed air

to the facility.

10. After start-up and approximately one month of service,

check that all piping and fittings are tight and free of leaks.

NOTICE

• For single-phase models, wait at least six (6) hours

after transporting or moving of dryer system

before starting the dryers. Turn the main power

switch to the dryer on, but do not turn the dryer

on/o switch to the on position until six (6) hours

have passed.

• For three-phase models, ensure that the power

switch is in the “o” position, but the electrical

service to the dryer is energized. This dryer must

be in this mode for at least twelve (12) hours

to allow the compressor crankcase heater to

energize and evaporate any liquid refrigerant

from the compressor. After twelve (12) hours,

turn on the power switch of the dryer. The power

indicating light should turn on.

NOTICE

The above discharge pressure depend upon ambient

temperature and can vary slightly according to

temperature uctuations.

APET Series Manual |

Refrigerated Air Dryer User Manual

3.6 Automatic Drain Valve Adjustments

The automatic drain valve supplied is standard on the separator

and should open regularly and discharge any accumulated

water into the drain line. The period between openings varies

with the dryer and operating conditions (electronic type). To

minimize air losses, the timer should be adjusted to open the

drain solenoid just long enough to discharge the accumulated

condensate. The factory sets the automatic drains to open for

7 seconds about every 7 minutes. If more than two seconds

of dry air comes out at the end of every discharge cycle,

reduce the open time (seconds) or increase the interval of the

discharge (minutes) to minimize air loss. If liquid is still being

discharged when the discharge cycle stops, increase the open

time (seconds) or shorten the interval of discharges (minutes)

so it discharges more often.

NOTICE

• Models with the hot gas by-pass valves and

expansion valves are preset at the factory for

the desired dew point. Do not adjust without

consulting with the factory.*

• The dryers are fully automatic and do not require

any auxiliary controls.

* Adjustments not authorized by the factory may void the

warranty.

| APET Series Manual

Refrigerated 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 4.

4.2 Short-Term Shut Down

(Over Night or Weekends)

The refrigerated air dryer system can be shut down at any time

by turning the unit off at the dryer by using the on/off switch or

at the main disconnect switch.

4.3 Shut Down Emergency

The non-cycling refrigerated air dryer system can be shut down

under any conditions and at any time by turning the unit off

at the dryer or at the main disconnect switch. Once power is

removed from the dryer system, the dryer must be isolated

from the compressed air stream to avoid a refrigeration circuit

over pressure situation.

SECTION 4: OPERATION

WARNING!

Pressure Hazard

This machine contains contents under high pressure,

which can cause severe injury.

• To avoid possible hazard or injury, the operator

should be fully familiar with the refrigerated air

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.

NOTICE

Before running compressed air ow through the dryer,

run the dryer for 15 minutes to stabilize temperature.

APET Series Manual |

Refrigerated Air Dryer User Manual

5.1 Introduction

To reach a field service technician or for technical support,

please call the number on the manual back cover.

5.2 Maintenance

Refrigerated air dryers require very little maintenance for

satisfactory operation. Optimum performance can be expected

if the following routine maintenance steps are taken.

5.2.1 DAILY

With the dryer on-line:

• Verify the operating pressure, temperature, and flow rate

are correct and conform to those listed in the Design

Parameters section. Adjust system if required.

• Always check refrigerant gauges to insure refrigeration

system is working properly.

• Check condensate drain separator for proper condensate

discharge. If no discharge is evident then depressurize

the unit, dismantle and clean separator and/or drain line.

Proper drain trap maintenance is the owner’s responsibility.

It is not covered by warranty.

• Make certain airflow is directed through dryer only. Observe

by-pass valves proper positions.

5.2.2 WEEKLY

• Repeat all daily inspections and record data in the

maintenance log.

To reach a field service technician or for technical support, please call the number on the manual back cover.

SECTION 5: MAINTENANCE

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.

WARNING!

Pressure Hazard

This machine contains contents under high pressure,

which can cause severe 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.

| APET Series Manual

Refrigerated Air Dryer User Manual

• Clean the condenser coils of accumulated dust and dirt with

a soft brush and/or with air pressure from a compressed

air nozzle (maximum 100 psig).

• Check the gauge readings for optimum system operation.

• Check oil removal filter (coalescer) indicator (if applicable);

if it is red, replace the filter.

5.3 Filter Element Replacement

1. Depressurize the air system to release the compressed air

from the air dryer.

2. Remove the filter bowl by turning the bowl 1/4 turn counter

clockwise, be sure the O-ring is in place on the top half of

the oil filter housing and that the O-ring seats properly. Air

leaks may occur if the O-ring is not secured (important).

3. The same procedure applies when removing the filter

separator for changing the element (if applicable).

NOTICE

Shutting down the air compressor will not depressurize

the air dryer unit. Close air line valves before and after

dryer and then depressurize unit. Depressurize dryer

by pushing the test button on the dryer system drain

until there is no more pressure in the dryer system.

APET Series Manual |

Refrigerated Air Dryer User Manual

SECTION 6: TROUBLESHOOTING

6.1 Introduction

If there is a problem with the refrigerated air dryer or

contamination down stream is present, the problem may be

identified from one or more of the following sources:

• Electrical

• Refrigeration

• Condensate removal (drains)

• Other

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.

WARNING!

Pressure Hazard

This machine contains contents under high pressure,

which can cause severe 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.

| APET Series Manual

Refrigerated Air Dryer User Manual

6.2 Electrical

• Make certain that the dryer is connected to proper power

supply in accordance with electrical diagram provided.

• Check electrical breaker, fuse, or disconnect to determine

if there is electrical power to the unit.

• A quick check should determine if the power switch is

turned on and the unit is running.

• After determining that power is supplied to the unit, go to

the next step.

6.3 Refrigeration

Non-cycling refrigerated air dryers with R-134a refrigerant

should have a suction gauge pressure reading of 28-40 psig

and a discharge gauge pressure reading of 160-250 psig

with the unit in the on position under full or partial load. If

the refrigerant gauge(s) reads more or less than the above

specified pressures, troubleshoot items below.

1. High refrigerant readings generally indicate:

• Dirty condenser - Clean immediately!

• Dryer not turned on.

• Overloading - Airflow or conditions in excess of dryer

capacity.

• High ambient temperature (≥ 100°F) Provide adequate

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.

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.

WARNING!

Chemical Hazard

Improper handling of refrigerant can cause severe

injury.

Refrigerant handling must be performed by a qualied

technician and all applicable national and local codes

must be followed.

NOTICE

Always observe refrigerant pressure gauge(s) to

determine if and how refrigeration circuit is operating.

APET Series Manual |

Refrigerated Air Dryer User Manual

ventilation for proper cooling, or reduce ambient

temperature.

• Condenser fan(s) not running - Call Technical Support.

• Refrigerant control too high - Contact Technical Support

for assistance.

2. Low refrigerant readings generally indicate:

• Low ambient temperature - Temperatures below 40°F.

Increase ambient temperatures or install head pressure

control valve. Contact Technical Support for more

information.

• Refrigerant control setting too low - Contact Technical

Support for assistance.

• Loss of refrigerant - Call Technical Support or qualified

refrigeration service.

6.4 Condensate Removal

The non-cycling refrigerated air dryer uses a refrigeration

circuit to cool the compressed air which causes moisture to

condense. The condensed moisture is separated from the dry

air and purged through an automatic drain.

1. Condensate downstream of dryer:

• If the unit is equipped with automatic drain override

switch, push manual override button to test drain flow.

• Ensure automatic electronic timer (if applicable) is

functioning properly.

• Ensure moisture separator (and coalescer) drain lines are

free from blockage.

• If the unit is equipped with y-strainer, disassemble and

clean.

• If oil is downstream from the dryer:

• Oil coalescer element is saturated.

• Dryer not turned on during air usage.

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.

WARNING!

Pressure Hazard

• This machine contains contents under high

pressure, which can cause severe injury. To avoid

possible hazard or injury, the operator should be

familiar with the refrigerated air 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.

| APET Series Manual

Refrigerated Air Dryer User Manual

6.5 Other

Sometimes a water or oil problem downstream from the dryer

can be identified by an inadvertent action or inaction by the

operator.

• Dryer not turned on before air usage.

• By-pass valves in wrong position.

• Air usage exceeding dryer capacity.

• Oil coalescer element dirty.

• Automatic drains not maintained.

APET Series Manual |

Refrigerated Air Dryer User Manual

6.6 APET Series Troubleshooting Guide

Problem Probable Cause Remedy

Water downstream

of dryer system or

no discharge from

separator/lter

Failed or short circuited timer on drain Replace timer drain

Failed drain solenoid Replace timer drain

Bulk liquid entering the dryer from

upstream

Check drains on aftercooler or air compressor

Inlet compressed air temperature to

dryer exceeds dryer capacity air

Check inlet air temperature and adjust as required to

meet specications

Inlet compressed air CFM ow rate

exceeds dryer capacity

Check inlet air cfm and adjust as required to meet

specications

Leak in the air-to-air heat exchanger Replace heat exchanger

Water downstream

and dryer system not

working properly

Refrigeration compressor stopped due

to plugged or dirty condenser coil (high

pressure)

Clean condensing coil and ensure adequate ventilation of

unit

Refrigeration compressor cycles on/o

and cannot maintain suction pressure

Check condensing coil for dirt or debris that could

prohibit adequate ventilation of the refrigeration circuit.

If it is clean, check refrigerant pressure gauge(s) to

determine if the unit is low on refrigerant.

Low refrigerant

Check for leak in refrigeration circuit; repair and recharge

according to specications

Low refrigerant, possible leak in air-to-

refrigerant side of heat exchanger

Repair or replace heat exchanger and recharge according

to specications

Refrigeration compressor is overheated

Turn o dryer and wait 20-40 minutes, restart dryer.

Refrigerant control settings may need adjustment,

contact Technical Support

Refrigeration compressor has burned

out or windings have gone to ground

Replace compressor; check for leak in refrigeration

circuit, repair and recharge according to specications.

Contact Technical Support.

| APET Series Manual

Refrigerated Air Dryer User Manual

6.6 APET Series Troubleshooting Guide

Problem Probable Cause Remedy

Water downstream

and dryer system not

working properly or

not working (cont.)

Refrigeration compressor cycles on/o

and cannot maintain suction pressure,

dryer undersized

Check airow (cfm) and dryer capacity. Reduce airow

through dryer or replace with a larger rated cfm dryer

Shorted fan motor winding

Check fan motor with ohmmeter and refer to motor

specications for correct value. Check wiring

schematic to ensure proper wiring of fan motor.

Replace motor if required.

Fan motor overload or unit short cycling

Check circuitry against electrical schematic (wiring

diagram). Check for high refrigerant pressure or for high

ambient temperature.

Defective overload protectors (fuses or

breakers)

Check overload protectors and replace if necessary

Low voltage or 3-phase imbalance

Check incoming power supply, voltage must be within 8%

to 12% of rating on the serial plate label.

Low water ow or pressure to water-

cooled condenser

Check water ow and/or pressure and adjust according to

specications. Contact Technical Support for assistance.

Defective fan control cycling switch Replace fan control cycling switch

Low air pressure

downstream or high

pressure drop across

the dryer system

Optional pre-lter element dirty or

plugged

Replace lter element

Suction pressure below set point,

causing freezing in the dryer heat

exchanger*

Refrigeration controls may require adjustment; contact

Technical Support for assistance. Refrigeration circuit may

be low on refrigerant. Locate leak in refrigeration circuit,

repair, and recharge according to specications.

Incorrect sizing or restriction in

compressed air line piping

Check compressed air piping for restrictions. Check

piping size to verify if it has the capacity to handle the

rated scfm at present working pressure of compressed

air system.

*NOTICE: To conrm freeze-ups, shut system o for 20 minutes and allow to thaw. Air pressure in line should

come back to normal pressure.

APET Series Manual |

Refrigerated Air Dryer User Manual

6.6 APET Series Troubleshooting Guide

Problem Probable Cause Remedy

Low air pressure

downstream due to

continuous air ow

through the moisture

drain line

Failed or short circuited timer on drain Replace timer drain

Failed drain solenoid Replace timer drain

Solenoid valve stuck open

If power is o and the air stops leaking, replace the

timer drain. If power is o and air continues leaking,

clean the timer drain.

Noise or vibration

coming from

refrigeration air dryer

system

Shipping damage has caused

compressor mounting to loosen

Check all mounting bolts on compressor and tighten

Cabinet panels or support beams

loosened during shipping

Check all screws and bolts on dryer system and tighten

Loose mounting bolts, bent fan blade, or

worn bearings on condenser fan motor

Tighten bolts, straighten or replace fan blade, or

replace fan motor

Noise coming from refrigeration

compressor due to liquid refrigerant

in compressor - caused by shipping or

moving of dryer

Let dryer system sit for six hours to allow refrigerant

to settle out of compressor and to allow crankcase

heater to warm compressor

Timer drain

stuck open

Failed or dirty timer drain

If power is o and the air stops leaking, replace the

timer drain. If power is o and air continues leaking,

clean the timer drain.

| APET Series Manual

Refrigerated Air Dryer User Manual

Problem Probable Cause Remedy

High refrigeration

circuit head pressure

(compressor is

overloaded and

gauge is reading out

of recommended

pressure range)

Refrigeration condenser coil fouled or

dirty or air ow blocked

Clean/blow o condensing coil of dirt or debris from the

inside out. Clear area in front of condensing coil of any

items blocking airow to coil.

Condenser fan motor not working

properly

Check fan motor for proper voltage and amp draw, repair

or replace fan motor

Defective fan control switch Repair switch or replace

Ambient temperature too high at

refrigeration dryer location

Cool ambient temperature around location of

refrigeration dryer down to a maximum of 100°F or

relocate dryer to a dierent area with lower ambient

temperature

Compressed air temperature entering

the refrigeration dryer is too high

Check compressed air inlet temperature to ensure it

is within the operating parameters listen in the Design

Parameters section. Check air compressor aftercooler for

proper operation.

Faulty heat exchanger, compressed air

leaking into refrigeration circuit

Repair or replace evaporator or heat exchanger and

recharge with refrigerant

Low refrigeration

circuit head pressure

(gauge is reading out

of recommended

pressure range)

Ambient temperature too low at

refrigeration dryer location

Increase ambient temperature at refrigeration dryer

location or relocate dryer. Head pressure control valve

may be required for low ambient use. Contact technical

support for assistance.

Refrigeration dryer circuit low on

refrigerant

Refrigeration circuit low on refrigerant; locate leak in

refrigeration circuit, repair, and recharge according to

specications.

Refrigeration compressor not working

properly or faulty

Check refrigeration compressor for proper voltage and

amp draw; repair or replace refrigeration compressor.

Compressed air temperature to

refrigeration dryer too low

The inlet compressed air temperature must be higher

than 40°F. If compressed air temperature is lower than

40°F, turn refrigerated air dryer o. Air may pass through

the dryer under this condition, once the compressed

air temperature has increased to 44°F, the dryer must

be turned back on to avoid a high refrigerant pressure

situation.

6.6 APET Series Troubleshooting Guide

APET Series Manual |

Refrigerated Air Dryer User Manual

Problem Probable Cause Remedy

High refrigerant suction

pressure, suction gauge

reading out of range,

and water downstream

of refrigeration dryer

Refrigeration circuit hot gas bypass valve

out of adjustment or defective

Contact Technical Support for assistance

Refrigeration expansion valve or TXV

adjustment tting out of adjustment

Contact Technical Support for assistance

Low refrigerant suction

pressure, suction gauge

reading out of range,

and/or refrigeration

compressor covered

with ice

Refrigeration circuit hot gas bypass valve

out of adjustment or defective

Contact Technical Support for assistance

Refrigeration expansion valve or TXV

adjustment tting out of adjustment

and is not feeding enough refrigerant to

evaporator

Contact Technical Support for assistance

Excessive pressure drop on the high side

of the refrigeration circuit

Check for a plugged in-line lter dryer or receiver on

the refrigeration circuit that could be causing these

restrictions.

Compressor oil

downstream of

refrigerated air dryer

Check optional pre-lter condensate

drain for failure

Dismantle pre-lter drain and clean or replace

Failed or plugged lter element Check optional pre-lter and replace element

Air compressor injecting excessive oil

into the air stream

Check air compressor for oil leak into the air stream,

check air oil separator element for failure

6.6 APET Series Troubleshooting Guide

| APET Series Manual

Refrigerated Air Dryer User Manual

APPENDIX A: SPECIFICATIONS

A.1 Tables of specifications - APET Series

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

Type of dryer: Refrigerated

Power supply: 115, 230, 460 Volt / single or three

phase / 60Hz

Refrigerant type: R-134A

Chemical Composition: HFC

All Models R-134a

Parameter

Description Air Pressure

Air Inlet

Temperature

Ambient

Temperature

Evaporator

Temperature

Suction Gauge

Reading

Discharge Gauge

Reading

Optimum 100 - 125 psig 80 - 100 (°F) 75 (°F) 35 - 42 (°F) 28 - 40 psig 160 - 230 psig

Maximum See data label 140 (°F) 120 (°F) 60 (°F) 60 psig 260 psig

Minimum 225 psig 40 (°F) 35 (°F) 33 (°F) 28 psig 80 psig

APET Series Manual |

Refrigerated Air Dryer User Manual

APPENDIX B: WIRING DIAGRAMS

B.1 APET Series

45 - 80 scfm

| APET Series Manual

Refrigerated Air Dryer User Manual

B.1 APET Series

125 - 200 scfm

APET Series Manual |

Refrigerated Air Dryer User Manual

B.1 APET Series

260 scfm

| APET Series Manual

Refrigerated Air Dryer User Manual

B.1 APET Series

415 scfm

APET Series Manual |

Refrigerated Air Dryer User Manual

B.1 APET Series

570 - 1,000 scfm

| APET Series Manual

Refrigerated Air Dryer User Manual

APPENDIX C: MATERIAL SAFETY DATA SHEETS

June 10, 2015 (rev. 1)

SAFETY DATA SHEET R-134a

1. IDENTIFICATION

PRODUCT NAME: Refrigerant 134a

SYNONYMS: R-134a, REFRIGERANT 134a, HFC 134a,

RECOMMENDED USE: Refrigerant

DISTRIBUTOR: Hudson Technologies Company

ADDRESS: PO Box 1541

One Blue Hill Plaza

Pearl River, NY 10965

EMERGENCY PHONE: 1- 800-501-4376

CHEMTREC PHONE: 1-800-424-9300

INFORMATION PHONE: 1-800-953-2244

2. HAZARDS IDENTIFICATION

EMERGENCY OVERVIEW: Colorless, volatile liquid with ethereal and faint sweetish odor. Non-flammable

material. Contact with the liquid may cause frostbite. Overexposure to vapors by inhalation may cause

dizziness and loss of concentration. At higher levels, central nervous system depression and cardiac

arrhythmia may result from exposure. Vapors displace air and can cause asphyxiation in confined spaces. At

higher temperatures, (>250°C), decomposition products may include Hydrochloric Acid (HCL), Hydrofluoric

Acid (HF) and carbonyl halides.

HAZARD

CLASSIFICATION: Gases Under Pressure

USDOT Hazard Class 2.2, Non-Flammable Gas

SIGNAL WORD: WARNING

HAZARD

STATEMENTS: Gas under pressure; may explode if heated

Harmful in contact with skin - may cause frostbite

May displace oxygen and cause rapid suffocation. Inhalation of high concentrations

of vapor is harmful and may cause heart irregularities, unconsciousness, or death.

C.1 R-134a Refrigerant

APET Series Manual |

Refrigerated Air Dryer User Manual

C.1 R-134a Refrigerant

June 10, 2015 (rev. 1)

SAFETY DATA SHEET R-134a

PRECAUTIONARY STATEMENTS

PREVENTION: Do not breathe vapors. Use only with adequate ventilation - never in a closed

space. Wear protective gloves. Wear eye protection.

RESPONSE: If inhaled: Remove person to fresh air and keep comfortable for breathing.

Immediately call a physician. If not breathing, give artificial respiration, preferably

mouth to mouth.

If breathing is difficult, give oxygen. Avoid stimulants. Do not give adrenalin

If on skin: Wash with plenty of water (not hot water) or use other means to warm

skin slowly.

If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses,

if present and easy to do. Continue rinsing. Call a physician.

STORAGE: Protect from sunlight. Store in well-ventilated place.

Do not heat above 120°F (50°C). Do not store in damp areas.

DISPOSAL: Comply with Federal, State and local regulations. Reclaim by distillation or remove

to a permitted waste disposal facility

CARCINOGENICITY: Ingredients found on one of the OSHA designated carcinogen lists are listed below.

INGREDIENT NAME

NTP STATUS IARC STATUS OSHA LIST

No ingredients listed in this section

3. COMPOSITION / INFORMATION ON INGREDIENTS

PRODUCT NAME: Refrigerant 134a

SYNONYMS: R-134a, REFRIGERANT 134a, HFC 134a

INGREDIENT NAME CAS NUMBER WEIGHT %

Ingredient Name

CAS Number

1,1,1,2-Tetrafluoroethane (HFC-134a) 811-97-2

Trace impurities and additional material names not listed above may also appear in Section 15 toward the end of this

Safety Data Sheet.

4. FIRST AID MEASURES

SKIN: Promptly flush skin with water until all chemical is removed. If there is evidence of frostbite,

bathe (do not rub) with lukewarm (not hot) water. If water is not available, cover with a clean, soft cloth or similar

covering. Get medical attention if symptoms persist.

EYES: Immediately flush eyes with large amounts of water for at least 15 minutes (in case of frostbite

water should be lukewarm, not hot) lifting eyelids occasionally to facilitate irrigation. Get medical attention if

symptoms persist.

| APET Series Manual

Refrigerated Air Dryer User Manual

C.1 R-134a Refrigerant

June 10, 2015 (rev. 1)

SAFETY DATA SHEET R-134a

INHALATION: Immediately remove to fresh air. If breathing has stopped, give artificial respiration. Use

oxygen as required, provided a qualified operator is available. Get medical attention. Do not give epinephrine

(adrenaline).

INGESTION: Ingestion is unlikely because of the physical properties and is not expected to be hazardous.

In case of accidental ingestion, get medical attention. Do not induce vomiting unless instructed to do so by a

physician.

ADVICE TO PHYSICIAN: Because of the possible disturbances of cardiac rhythm, catecholamine drugs,

such as epinephrine, should be used with special caution and only in situations of emergency life support. Treatment

of overexposure should be directed at the control of symptoms and the clinical conditions.

5. FIRE FIGHTING MEASURES

FLAMMABLE LIMITS IN AIR, UPPER: N/A

(% BY VOLUME) LOWER: N/A

FLASH POINT: None

AUTOIGNITION TEMPERATURE: F: >1369; C: >743

NFPA HAZARD CLASSIFICATION

HEALTH: 1 FLAMMABILITY: 0 REACTIVITY: 1 OTHER:

EXTINGUISHING MEDIA: Appropriate for combustibles in the area.

SPECIAL FIRE FIGHTING PROCEDURES: Use water spray to cool containers. Self-contained breathing

apparatus (SCBA) is required if cylinders rupture and contents are released under fire conditions.

UNUSUAL FIRE AND EXPLOSION HAZARDS: Cylinders may rupture under fire conditions. HFC 134a

should not be permitted to mix with air above atmospheric pressure or at high temperatures, or in an oxygen

enriched environment, since under such conditions it can become combustible in the presence of an ignition source.

HAZARDOUS DECOMPOSITION PRODUCTS: Under high temperatures, this product can form hydrofluoric

acid, and possibly carbonyl fluoride.

6. ACCIDENTAL RELEASE MEASURES

IN CASE OF SPILL OR OTHER RELEASE:

(Always wear recommended personal protective equipment.)

Evacuate unprotected personnel. Protected personnel should remove ignition sources and shut off leak, if without

risk, and provide ventilation. Use self-contained breathing apparatus (SCBA) for large spills or releases.

Unprotected personnel should not return until air has been tested and determined safe, including low- lying areas.

Spills and releases may have to be reported to Federal and/or local authorities. See Section 15 regarding

reporting requirements.

APET Series Manual |

Refrigerated 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

| APET Series Manual

Refrigerated 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

APET Series Manual |

Refrigerated Air Dryer User Manual

C.1 R-134a Refrigerant

June 10, 2015 (rev. 1)

SAFETY DATA SHEET R-134a

12. ECOLOGICAL INFORMATION

Aquatic Toxicity:

48-hour EC50, Daphnia magna: 980 mg/L

96-hour LC50. Rainbow trout: >450mg/L

Degradability (BOD): R-134A is a gas at room temperature; therefore, it is unlikely to remain in water.

Octanol Water Partition Coefficient: Unknown for mixture

13. DISPOSAL CONSIDERATIONS

RCRA - Not a hazardous waste.

OTHER DISPOSAL CONSIDERATIONS:

Disposal must comply with federal, state, and local disposal or discharge laws. R-134A is subject to U.S.

Environmental Protection Agency Clean Air Act Regulations Section 608 in 40 CFR Part 82 regarding refrigerant

recycling.

The information offered here is for the product as shipped. Use and/or alterations to the product such as

mixing with other materials may significantly change the characteristics of the material and alter the RCRA

classification and the proper disposal method.

14. TRANSPORT INFORMATION

HAZARD CLASS: 2.2

ID NUMBER: UN3159

PACKING GROUP: N/A

LABEL STATEMENT: NONFLAMMABLE GAS

SHIPPING CONTAINERS: Tank Cars, cylinders, ton tanks

For additional information on shipping regulations affecting this material, contact the information number found in

Section 1.

15. REGULATORY INFORMATION

TOXIC SUBSTANCES CONTROL ACT (TSCA)

TSCA INVENTORY STATUS: Components listed on the TSCA inventory

OTHER TSCA ISSUES: None

SARA TITLE III / CERCLA

“Reportable Quantities” (RQs) and/or “Threshold Planning Quantities” (TPQs) exist for the following ingredients.

INGREDIENT NAME

SARA / CERCLA RQ (lb.) SARA EHS TPQ (lb.)

No ingredients listed in this section

| APET Series Manual

Refrigerated Air Dryer User Manual

C.1 R-134a Refrigerant

June 10, 2015 (rev. 1)

SAFETY DATA SHEET R-134a

Spills or releases resulting in the loss of any ingredient at or above its RQ requires immediate notification to

the National Response Center [(800) 424-8802] and to your Local Emergency Planning Committee.

SECTION 311 HAZARD CLASS: IMMEDIATE PRESSURE

SARA 313 TOXIC CHEMICALS:

The following ingredients are SARA 313 “Toxic Chemicals”. CAS numbers and weight percents are found

in Section 3.

INGREDIENT NAME

COMMENT

No ingredients listed in this section

STATE RIGHT-TO-KNOW

In addition to the ingredients found in Section 3, the following are listed for state right-to-know purposes.

INGREDIENT NAME

WEIGHT % COMMENT

No ingredients listed in this section

ADDITIONAL REGULATORY INFORMATION:

R-134A is subject to U.S. Environmental Protection Agency Clean Air Act Regulations at 40 CFR Part 82.

WARNING:

Do not vent to the atmosphere. To comply with provisions of the U.S. Clean Air Act, any residual must be

recovered.

1,1,1,2-Tetrafluoroethane (HFC-134a), is a greenhouse gas which may contribute to global warming.

16. OTHER INFORMATION

DISCLAIMER: The above information is based upon technical information believed to be accurate but does

not purport to all-inclusive and should be used only as a guide. Hudson Technologies Company shall not be

held liable for any damage from handling or from contact with this product. No warranty of merchantability

or any warranty, express or implied is made with respect to such information

APET Series Manual |

Refrigerated Air Dryer User Manual

DATE SERVICE PERFORMED NOTES

NOTES

| APET Series Manual

Refrigerated Air Dryer User Manual

DATE SERVICE PERFORMED NOTES

NOTES

APET Series Manual |

Refrigerated Air Dryer User Manual

DATE SERVICE PERFORMED NOTES

NOTES

| APET Series Manual

Refrigerated Air Dryer User Manual

DATE SERVICE PERFORMED NOTES

NOTES

APET Series Manual |

Refrigerated 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