Ingersoll-Rand HRD30 Operator's Instruction Manual

Brand: Ingersoll-Rand

Model: HRD30

Type: Operator's Instruction Manual

Bulletin 341 Revision F 7/97

HRD SERIES

HEATLESS COMPRESSED AIR DRYERS

OPERATOR’S

INSTRUCTION MANUAL

Before installation or starting the dryer for the

first time, study this manual carefully to obtain

a clear knowledge of the unit and of the duties

to be performed while operating and maintain-

ing the unit.

RETAIN THIS MANUAL WITH UNIT.

This technical manual contains IMPORTANT

SAFETY DATA and should be kept with the

dryer at all times.

Table Of Contents

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Receiving and Inspection . . . . . . . . . . . . . . . . . . . . 1

Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Ambient Air Temperature . . . . . . . . . . . . . . . . . . . . 2

Location and Clearance . . . . . . . . . . . . . . . . . . . . . 2

System Arrangement . . . . . . . . . . . . . . . . . . . . . . 2

Piping and Connections . . . . . . . . . . . . . . . . . . . . . 2

Desiccant . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Mufflers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Electrical Connections. . . . . . . . . . . . . . . . . . . . . . 4

INSTRUMENTATION. . . . . . . . . . . . . . . . . . . . . . . . . 4

Power ON Light . . . . . . . . . . . . . . . . . . . . . . . . . 4

Vessel Pressure Gauges . . . . . . . . . . . . . . . . . . . . . 4

Purge Flow Indicator . . . . . . . . . . . . . . . . . . . . . . 4

Switch-Failure Alarm (Optional) . . . . . . . . . . . . . . . . 5

High-Humidity Alarm (Optional) . . . . . . . . . . . . . . . . 5

Moisture Indicator (Optional) . . . . . . . . . . . . . . . . . . 5

Dew Point Monitor (Optional) . . . . . . . . . . . . . . . . . 5

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

How It Works . . . . . . . . . . . . . . . . . . . . . . . . . . 5

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Dew Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Dew Point Adjustment. . . . . . . . . . . . . . . . . . . . . . 6

Dew Point Verification . . . . . . . . . . . . . . . . . . . . . 7

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Desiccant Dusting . . . . . . . . . . . . . . . . . . . . . . . . 8

Maintenance Schedule. . . . . . . . . . . . . . . . . . . . . . 8

Daily . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Weekly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Yearly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Returns to Manufacturer. . . . . . . . . . . . . . . . . . . . . 9

Desiccant Replacement . . . . . . . . . . . . . . . . . . . . . 9

High-Humidity Alarm Field Adjustment . . . . . . . . . . . 10

FIELD SERVICE GUIDE . . . . . . . . . . . . . . . . . . . . . . 12

ELECTRICAL SCHEMATIC . . . . . . . . . . . . . . . . . . . . 13

REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . 14

MATERIAL SAFETY DATA SHEETS . . . . . . . . . . . . . . . 17

INTRODUCTION

HRD Series heatless dryers use nonconsumable

desiccants to remove moisture from compressed air to

achieve pressure dew points as low as –100°F. The

heatless dryer supplies a continuous flow of dry air

through two desiccant vessels, one adsorbing moisture

from the inlet air while the other is being reactivated.

Reactivation is accomplished by diverting a portion of

the dried air from the on stream vessel to the off stream

vessel. The drying cycle is controlled by an electric or

pneumatic cam timer. Dew point can be adjusted by

changing the amount of purge air used for reactivation.

To ensure continuing good dryer performance and safe

operation, everyone who installs, uses or maintains the

dryer must read and carefully follow the instructions in

this manual. Throughout the manual, the word dryer is

used to refer to HRD Series heatless air dryers.

SAFETY

HRD Series heatless dryers are designed and built with

safety as a prime consideration; industry-accepted

safety factors have been used in the design. Each dryer

is checked at the factory for safety and operation. The

desiccant vessels are hydrostatically tested to 1½ times

the maximum pressure in accordance with ASME code

requirements. A factory-installed safety relief valve is

standard on each dryer.

WARNING

The following safety rules must be observed

to ensure safe dryer operation. Failure to fol-

lowtheserulesmayvoidthewarrantyorresult

in dryer damage or personal injury.

1. Never install or try to repair any dryer that has been

damaged in shipment. See the Receiving and In-

spection instructions in this manual for appropriate

action.

2. Never operate the dryer at pressures or tempera-

tures above the maximum conditions shown on the

data plate.

3. Always supply electrical power that is within the

allowable voltage range shown on the data plate.

4. Never dismantle or work on any component of the

dryer or compressed air system under pressure.

Vent internal air pressure to the atmosphere before

servicing.

5. Never perform electrical service on the dryer unless

the main power supply has been disconnected.

Parts of the control circuit may remain energized

when the power switch is turned off.

6. Use only genuine replacement parts from the manu-

facturer. The manufacturer bears no responsibility

for hazards caused by the use of unauthorized parts.

Safety instructions in this manual are boldfaced for em-

phasis. The signal words DANGER, WARNING and

CAUTION are used to indicate hazard seriousness lev-

els as follows:

DANGER—Immediate hazard which will result in se-

vere injury or death.

WARNING—Hazard or unsafe practice which could re-

sult in severe injury or death.

CAUTION—Hazard or unsafe practice which could re-

sult in minor injury or in product or property damage.

The dryer data plate, attached to the left side of the elec-

trical control box, contains critical safety and identifica-

tion information. If the data plate is missing or defaced,

contact your local distributor for a replacement.

INSTALLATION

Receiving and Inspection

Immediately upon receipt of the dryer, thoroughly in-

spect for damage that may have occurred during ship-

ping. Since the dryer is shipped F.O.B. New Castle,

Delaware, the carrier is legally responsible for damage

incurred during shipping. Shipping damage is not cov-

ered by the dryer warranty.

If goods are received short or damaged, notify the car-

rier and insist on a notation of the loss on the face of the

bill of lading. Otherwise no claim can be enforced

against the carrier.

If concealed loss or damage is discovered, notify the

carrier at once and request an inspection. The carrier

will make an inspection and grant a concealed damage

notation. The carrier will not consider any claim for loss

or damage unless an inspection has been made. If you

HRD Series Heatless Dryer (Bulletin 341) 1

give the carrier a clear receipt for goods that have been

damaged or lost in transit, you do so at your own risk

and expense.

If there is any damage, file a claim with the carrier, then

call your local distributor for further instructions.

Handling

The dryer is designed to be moved by means of the

shipping skid or the base channels. Handle the dryer

with care and only with equipment capable of lifting the

load.

Ambient Air Temperature

Locate the dryer under cover in an area where the ambi-

ent air temperature is between 35°F and 120°F. Ambi-

ent temperatures over 100°F can be tolerated but will

adversely affect dryer performance. If ambient tempera-

tures below 35°F cannot be avoided, contact your local

distributor.

Location and Clearance

Install the dryer on a level pad. The dryer is provided

with

⁄8-inch dia. anchor bolt holes. For dryers HRD2

through HRD35, anchor the dryer to the floor with four

½-inch dia. bolts with a minimum 4-inch thread engage-

ment. For dryers HRD40 through HRD100, anchor the

dryer to the floor with four ¾-inch dia. bolts with a min-

imum 6-inch thread engagement. Allow 24 inches clear-

ance on all sides of the dryer for servicing. Provide

adequate clearance for prefilter and afterfilter element

replacement. Provide protection for the dryer if it is in-

stalled where heavy vehicles or similar portable equip-

ment are likely to cause damage.

System Arrangement

Install the dryer downstream of an aftercooler and sepa-

rator so that the dryer inlet air is between 60°F and

120°F and contains no liquid water. Liquid water and/or

inlet air temperatures above 100°F can reduce drying

capacity. Contact your local distributor for information

on proper dryer sizing at elevated inlet air temperatures.

Oil contaminates the desiccant, reducing drying effi-

ciency and desiccant life. If the inlet air to the dryer

contains oil, an oil-removing filter must be installed at

the dryer inlet. If the inlet air is oil free, a particulate

prefilter should be installed to remove dirt and other

solid particles. A particulate filter should be installed at

the dryer outlet to capture desiccant particles.

Piping and Connections

All external piping must be supplied by the user unless

otherwise specified. Refer to Table 1 for connection

sizes. Inlet and outlet manual shutoff valves and a vent

valve are recommended so the dryer can be isolated and

depressurized for servicing. Refer to Figure 1 for rec-

ommended piping layout. The connections and pipe fit-

tings must be rated for or exceed the maximum

operating pressure given on the dryer nameplate and

must be in accordance with industry-wide codes. Be

sure all piping is supported. Do not allow the weight of

any piping to bear on the dryer or filters. Piping should

be the same size as or larger than the dryer connections.

Piping smaller than the dryer connections will cause

high pressure drop and reduce drying capacity.

If the purge exhaust muffler piping must be extended

outside the dryer area, the piping must be sized so that it

will cause no back pressure. Back pressure reduces

the capacity of the dryer. Consult the factory for pip-

ing details if required.

2 HRD Series Heatless Dryer (Bulletin 341)

Figure 1

RECOMMENDED PIPING LAYOUT

Dryer bypass piping may be installed to allow uninter-

rupted airflow during servicing. If the downstream ap-

plication cannot tolerate unprocessed air for short

periods, install a second dryer in the bypass line.

CAUTION

Do not hydrostatically test the piping with the

dryer in the system. The desiccant will be

damaged if saturated with water.

Table 1

CONNECTIONS

Model

In/Out

Connections

(inches NPT)

HRD2 1

HRD5 1

HRD10 1

HRD15 1

HRD20 1

HRD25 2

HRD30 2

HRD35 2

HRD40 3

HRD45 3

HRD50 3

HRD55 3

HRD60 3

HRD65 4" FLG

HRD70 4" FLG

HRD75 4" FLG

HRD80 4" FLG

HRD85 6" FLG

HRD90 6" FLG

HRD95 8" FLG

HRD100 8" FLG

The dryer may be equipped with optional pneumatic

controls for cycling airflow through the vessels. All

control air piping is installed at the factory. Control air-

flow and pressure are factory set.

Desiccant

Standard dryers, which dry to a –40°F pdp, use acti-

vated alumina as the desiccant in the dryer vessels.

Models HRD2 through HRD35 are shipped with acti-

vated alumina in the dryer vessels. Activated alumina is

shipped loose with all other standard models.

Dryers that dry to a –100°F pdp (designated by the suf-

fix J in the model number) use activated alumina and

molecular sieve in the dryer vessels.

Models HRD2-J through HRD35-J are shipped with ac-

tivated alumina in the dryer vessels. Molecular sieve for

these models is shipped loose. Activated alumina and

molecular sieve are shipped loose with all other –100°F

pdp models.

All desiccant is shipped loose and must be added to

the dryer vessels before the dryer is put into service.

Refer to Table 2 for desiccant type and quantity per ves-

sel.

Table 2

DESICCANT REQUIREMENTS

Model

–40°F PDP –100°F PDP

Activated Alu-

mina

(lbs per ves-

sel)

Activated Alu-

mina

(lbs per ves-

sel)

Molecular

Sieve

(lbs per ves-

sel)

HRD2 28 19 8

HRD5 60 40 16

HRD10 95 65 27

HRD15 120 80 33

HRD20 165 110 46

HRD25 210 140 58

HRD30 285 190 79

HRD35 366 250 101

HRD40 475 325 133

HRD45 600 400 165

HRD50 725 500 200

HRD55 875 575 238

HRD60 1025 675 282

HRD65 1200 800 330

HRD70 1366 911 379

HRD75 1567 1045 435

HRD80 1828 1219 508

HRD85 2495 1663 693

HRD90 3205 2150 890

HRD95 4075 2717 1132

HRD100 5126 3425 1425

HRD Series Heatless Dryer (Bulletin 341) 3

To add desiccant:

DANGER

EXPLOSION HAZARD

Completely vent the internal air pressure to

theatmospherebeforeaddingorreplacingthe

desiccant, or performing any maintenance

work on your dryer. Pressure gauges on both

dryer vessels must indicate 0 psig.

WARNING

The following procedure gives the instruc-

tions for adding the initial desiccant to the

vessels. If replacing desiccant, refer to in-

structions on page 11. Pressure gauges on

both dryer vessels must indicate 0 psig.

1. Depressurize the vessel according to the shutdown

instructions on page 8. The pressure gauges on both

vessels must indicate 0 psig before service contin-

ues.

2. Remove the pipe plug from the desiccant fill port at

the top of each vessel. Tee connections are labeled

“DESICCANT INSPECTION PORT.”

CAUTION

Pouring desiccant creates a fine dust; safety

goggles, gloves and dust mask should be

worn by personnel installing desiccant. Refer

to the Material Safety Data Sheets (MSDS),

pages - for more complete information.

Do not tamp the desiccant in vessels.

Tamping damages desiccant and causes

dusting.

3. Carefully pour activated alumina into the vessels

through the fill port.

4. If molecular sieve is required, first pour the correct

amount of activated alumina into each vessel; pour

the molecular sieve on top of the activated alumina.

5. Tap the vessels with a rubber mallet to ensure uni-

form distribution of the desiccant.

6. Replace the plugs in the fill port connections.

Mufflers

Purge exhaust mufflers are supplied with every dryer. If

they are not factory installed, they must be screwed into

the purge exhaust connection on the lower manifold

piping before the dryer is operated. Desiccant dusting

may cause a restriction in the purge exhaust muffler

shortly after start-up. A spare set of muffler cores are

shipped loose with each dryer. Depending on dryer

model, the muffler cores may be in the control enclo-

sure or strapped to a vessel leg. For additional informa-

tion see Desiccant Dusting in the MAINTENANCE

section.

WARNING

Operating dryer without mufflers will cause

noise levels exceeding OSHA standards. Re-

move mufflers only for servicing and mainte-

nanceandonlyafterinternal pressureofdryer

has been completely vented to atmosphere.

Electrical Connections

The dryer is prewired, ready for use. Connect the dryer

to the power supply specified on the data plate. Connec-

tions, marked L1 and L2, are on a terminal strip inside

the electrical box. Make connections through the

plugged hole (identified by a tag) on the bottom right of

the box.

DANGER

Ground the dryer using the connection sup-

plied inside the electrical box. Refer to the

electricalschematicat the back ofthismanual

for connection details.

INSTRUMENTATION

The following instrumentation helps in monitoring

dryer operation and performance. Instruments which are

available as options are so noted.

Power ON Light

The power ON light on the control panel indicates when

the dryer is turned on and operating.

4 HRD Series Heatless Dryer (Bulletin 341)

Vessel Pressure Gauges

A gauge mounted on each desiccant vessel indicates

which vessel is on stream and which is regenerating.

The gauge on the on stream vessel indicates operating

pressure; the gauge on the regenerating vessel indicates

0 psig.

Purge Flow Indicator

A gauge at the top of the dryer indicates purge air pres-

sure as an approximate measure of purge airflow when

used with the calibration graph shipped with the dryer.

To approximate purge airflow, locate the pressure gauge

reading (psig) on the horizontal axis of the graph. Fol-

low the pressure upward until it intersects the calibra-

tion curve. Follow this point to the left until it intersects

the vertical axis. This point on the vertical axis is ap-

proximately the purge airflow.

Switch-Failure Alarm (Optional)

Pressure sensors located on each vessel trigger both au-

dible and visible alarms if a vessel does not depressurize

at the completion of its drying cycle. A red light, la-

beled SWITCH FAILURE, is located on the electrical

panel. A time-delay relay is included separately in the

dryer packaging. The relay must be mounted into the

electrical panel before start-up. The electrical schematic

at the back of this manual gives wiring details.

High-Humidity Alarm (NEMA Type 1, 4 &

12) (Optional)

A moisture sensor in the dryer outlet manifold monitors

the relative humidity of the outlet air. The sensor trig-

gers audible and visible alarms if the relative humidity

of the outlet air exceeds the factory setting. The audible

alarm is located near the control enclosure. A red light,

labeled HIGH HUMIDITY, is located on the electrical

panel. A set-plug adjustment bulb (refer to Figure 5,

page 11) is included for use in calibrating the

high-humidity alarm. Contacts for remote annunciators

are connected to the terminal strip in the electrical en-

closure; refer to the electrical schematic for terminal

numbers. Refer to the maintenance section of this man-

ual for field adjustment instructions.

Moisture Indicator (Optional)

A color-change moisture indicator is shipped in a mois-

ture-proof bag inside the electrical box. The indicator is

green when dry. The color changes to yellow when the

relative humidity of the dryer outlet air is approximately

4%-5%. This indicator is intended only as an inexpen-

sive means of determining possible dryer malfunction.

Dew Point Monitor (NEMA Type 1, 4 & 12)

(Optional)

The monitor is between the vessels beneath the electri-

cal box. It continuously displays outlet pressure dew

point. (Consult the owner’s manual supplied with the

monitor for more information.)

OPERATION

How It Works

HRD Series heatless dryers provide a continuous supply

of dry compressed air by automatically cycling the flow

of air through two desiccant beds. While one bed is ad-

sorbing moisture from the inlet air, the other bed is be-

ing reactivated by a portion of the dried air. Cycling is

HRD Series Heatless Dryer (Bulletin 341) 5

Figure 2

AIRFLOW SCHEMATIC

controlled by a cam timer, which may be electric (stan-

dard) or pneumatic (optional). The schematic diagram,

Figure 2, shows the airflow through the dryer with ves-

sel A on stream and vessel B being reactivated.

With purge valve E closed, incoming wet air flows

through shuttle valve S into the bottom of vessel A;

moisture is removed from the air stream by the

desiccant. Dry air exits the top of the vessel and divides

into two streams: process air exits through the shuttle

valve T, and a portion of the dried air (purge air) is me-

tered through orifice C and reduced to atmospheric

pressure by orifice D, greatly expanding its volume. The

expanded purge air flows down through vessel B and

out through the purge valve F and muffler, carrying

away moisture adsorbed by the desiccant in the previous

cycle.

The dryer operates this way for approximately 4 min-

utes. Then purge valve F closes, allowing vessel B to

gradually repressurize for approximately 1 minute be-

fore the cycle changes. The cycle timing sequence will

vary depending on operating pressure. At switchover,

purge valve E opens to depressurize vessel A. This

causes shuttle valves S and T to shift so that vessel B is

on stream and vessel A is being reactivated.

Start-Up

Once the HRD Series heatless dryer has been installed

according to instructions, it is ready to be operated. The

dryer is fully automatic and does not require any auxil-

iary controls.

To start the dryer:

1. Close the customer-supplied letdown valve and the

shutoff valve downstream of the dryer and

afterfilter.

2. Open the customer-supplied bypass valve.

3. Slowly open the customer-supplied shutoff valve

upstream of the dryer and prefilter to pressurize the

dryer until both vessels reach line pressure.

4. Turn on the power switch located on the control en-

closure. Depending on the position of the switching

valve and specified operating pressure, one of the

vessels will depressurize, or both vessels will re-

main pressurized for up to 90 seconds, then one

will depressurize.

CAUTION

If the dryer is equipped with optional pneu-

matic control, check the pressure gauges in-

side the control enclosure. Correct control-air

operating pressure is indicated below the

gauges. Adjust the pressure regulators as re-

quired.

5. Operate the dryer for three cycles to verify satisfac-

tory operation. The dryer cycle is 10 minutes, with

each vessel on stream for five minutes.

6. Slowly open the outlet shutoff valve.

7. Close the dryer bypass valve.

Dew Point

The pressure dew point of the outlet air is controlled by

the amount of purge air used for reactivation. Purge air-

flow is continuous and is adjustable within a set range.

Orifices in the purge air line are sized to control to the

highest dew point (–20°F). Lower dew points can be se-

lected by manually adjusting the purge adjustment valve

to increase the purge airflow. Dryer installation and

start-up must be completed before the purge valve is ad-

justed.

Standard HRD Series heatless dryers are designed for

pressure dew points between –20°F and –60°F. For ap-

plications requiring dew points outside this range con-

tact your local distributor.

Dew Point Adjustment

After your dryer has been installed and the start-up pro-

cedure completed, adjust the dryer for a –40°F dew

point as follows.

1. Determine air pressure (psig) at the dryer inlet.

2. Refer to Table 3. For your model and inlet air pres-

sure, determine the inlet airflow and average purge

rate (% of inlet air) required to produce a –40°F

dew point.

3. Calculate the required purge flow (scfm):

Purge Flow = Purge Rate x Inlet Flow

4. Refer to the purge flow calibration graph shipped

with the dryer. On the graph, locate the average

6 HRD Series Heatless Dryer (Bulletin 341)

purge airflow (calculated in Step 3) and the corre-

sponding purge adjustment valve setting (psig).

5. Manually adjust the purge adjustment valve at the

top of the dryer until the correct setting is indicated

on the gauge.

CAUTION

Inlet air temperatures higher than 100°F will

reduce the design dew point of the dryer.

The dryer can now be put into service. No further ad-

justments are necessary unless there are changes in op-

erating conditions. Within limits, changes in inlet flow

rate can be compensated for by adjusting the purge ad-

justment valve (repeat Steps 1 through 5 above).

Dew Point Verification

After the dryer has operated for a minimum of five

days, check the dew point of the outlet air with a pres-

sure dew point instrument. Follow the directions for the

instrument used. For extremely low dew points allow

the probe to dry for up to 24 hours after inserting it into

the air stream. It may take up to two weeks of dryer op-

eration to stabilize at dew points in the –80°F to

–100°F range.

Use only metallic tubing when checking dew point

since plastics, rubber and similar materials absorb mois-

ture from the ambient air and give false readings.

HRD Series Heatless Dryer (Bulletin 341) 7

Table 3

INLET AIRFLOW AT VARIOUS INLET AIR PRESSURES

Model

Average Inlet Airflow (scfm)

Recommended

Filters

Inlet Air Pressure (psig)

30 40 50 60 70 80 90 100 110 125 150 Prefilter Afterfilter

HRD2 19 24 28 33 37 41 46 50 54 61 72 IR75CD IR60PD

HRD5 37 48 57 65 74 83 91 100 109 122 143 IR125C IR100P

HRD10 60 77 91 104 118 132 146 160 174 195 229 IR200C IR300P

HRD15 74 96 113 130 147 165 183 200 217 244 287 IR200C IR300P

HRD20 102 132 156 179 202 227 251 275 299 335 394 IR300C IR300P

HRD25 130 167 198 228 258 289 320 350 380 427 502 IR400C IR450P

HRD30 177 227 269 310 350 392 434 475 516 579 681 IR600C IR450P

HRD35 224 287 339 391 442 496 548 600 652 731 861 IR600C IR900P

HRD40 298 383 453 522 589 661 731 800 869 975 1147 IR950C IR900P

HRD45 372 478 566 652 736 826 914 1000 1086 1219 1434 IR1600C IR1250P

HRD50 447 574 679 783 884 991 1096 1200 1304 1462 1721 IR1600C IR1250P

HRD55 536 689 815 939 1060 1190 1315 1440 1565 1755 2065 IR1600C IR1250P

HRD60 633 813 962 1109 1252 1404 1553 1700 1847 2072 2438 IR1900C IR2500P

HRD65 744 956 1132 1304 1472 1652 1828 2000 2172 2438 2868 IR2550C IR2500P

HRD70 883 1080 1278 1475 1673 1870 2068 2265 2462 2759 3252 IR2550C IR2500P

HRD75 1004 1228 1453 1678 1902 2127 2351 2575 2801 3137 3697 IR2550C IR2500P

HRD80 1263 1545 1828 2110 2393 2675 2958 3240 3522 3946 4652 IR4000C IR3000P

HRD85 1728 2115 2502 2888 3275 3662 4048 4435 4822 5402 6368 IR5000C IR5000P

HRD90 2268 2776 3283 3790 4298 4805 5313 5820 6327 7089 8357 IR7500C IR7500P

HRD95 2855 3493 4132 4771 5409 6048 6686 7325 7964 8922 IR7500C IR7500P

HRD100 3546 4340 5133 5927 6720 7513 8307 9100 9893 11083 IR10000C IR10000P

Maximum inlet air pressure, 150 psig. Higher pressures available as an option on some models; consult your local distributor.

Consult factory for information on models not shown.

Based on 100°F inlet air temperature and –40°F pressure dew point. Maximum recommended inlet temperature, 120°F.

For capacity at inlet temperature higher than 100°F, consult your local distributor.

Based on –40°F PDP, 100 psig inlet air pressure and average inlet airflow.

MAINTENANCE

Shutdown

If the dryer or the air system is shut down, desiccant life

can be prolonged by venting the dryer internal pressure

to the atmosphere.

DANGER

EXPLOSION HAZARD

Dismantling or working on any component of

the compressed air system under pressure

may cause equipment damage and serious in-

jury. Before dismantling any part of the dryer

or compressed air system, completely vent

the internal air pressure to the atmosphere.

To vent dryer pressure:

1. Turn the power switch OFF.

2. Open the customer-supplied bypass valve (if in-

stalled).

3. Close the customer-supplied shutoff valve down-

stream of the dryer.

4. Close the customer-supplied shutoff valve upstream

of the dryer.

5. Slowly open the customer-supplied

depressurization valve to vent the dryer internal air

pressure.

6. When the internal air pressure is 0 psig, close the

depressurization valve.

Restart the dryer according to the start-up instructions

on page 6.

If electrical maintenance must be performed on the

dryer, electrical power to the dryer must be locked out

and tagged in accordance with OSHA requirements.

DANGER

SHOCK HAZARD

Portions of the electrical control circuit re-

main energized when the power switch is

turned OFF. Disconnect the main power sup-

ply to the dryer before performing mainte-

nance on the electrical system.

Before performing electrical maintenance:

1. Turn the power switch off.

2. Disconnect the main power supply.

Desiccant Dusting

The dryer vessels for models HRD2 through HRD35 are

shipped filled with desiccant. Some dusting will occur

from movement of the desiccant during shipping. Dust

carried by the purge air eventually plugs the mufflers

preventing complete depressurization of the off stream

vessel and proper airflow switching. When this occurs

the muffler cores must be replaced. Two replacement

cores are provided with the dryer. Replace muffler cores

when the pressure gauge on the off stream vessel indi-

cates a pressure higher than 0 psig. Replacement inter-

val depends on dryer usage and the quantity of desiccant

dust formed.

CAUTION

The desiccant beds may fluidize at excessive

airflow rates. Refer to Table 3, page 7.

Airflow surges may also cause fluidization.

Surges may occur if the dryer is not started in

accordance with instructions (page 6) or if the

dryer is located downstream of a receiver.

Conditions that cause fluidization must be

avoided. Fluidization causes excessive dust-

ing and rapid degradation of the desiccant, re-

ducing its effective life. Desiccant dusting

causesvalvesto wear and malfunctionand fil-

ters to plug up rapidly.

8 HRD Series Heatless Dryer (Bulletin 341)

Maintenance Schedule

The following periodic checks should be made to moni-

tor dryer operation. These inspections will help you

schedule servicing to ensure continuing good dryer per-

formance and safe operation.

Action Schedule

Check prefilter drain valve Daily

Check system monitor lights Daily

Check filter differential pressure indicators Weekly

Check purge exhaust valves Weekly

Check exhaust mufflers Weekly

Check and calibrate dew point monitor Yearly

Inspect desiccant Yearly

Replace solenoid and butterfly valve dia-

phragms and seats

Yearly

CAUTION

Contact your local distributor before doing

any work on the solid state controls. At-

tempting to service circuit boards or compo-

nents may result in equipment damage and

will void the warranty.

Daily

1. For models HRD35 through HRD60, check the fil-

ter above the dryer inlet.

2. Check drain valve on prefilter for discharge. (A

prefilter with drain valve should be installed up-

stream of the dryer to protect the desiccant; see In-

stallation, page 1.) If no condensate discharges

from drain valve, follow Shutdown procedure (page

8), then dismantle and clean, repair or replace drain

valve as required.

3. Check system monitoring lights on bottom half of

indicating light panel. If any light is lit, see expla-

nations in Instrumentation section (page 4) for di-

agnosis and Field Service Guide (page 14) for

remedy.

Check the following options as applicable:

4. Check the color of the moisture indicator in the

dryer outlet. When the dryer is functioning nor-

mally, the indicator is green. If the indicator is yel-

low, refer to the Field Service Guide for remedy.

5. Check the switch-failure alarm light on the control

panel. If the light is on, refer to the Field Service

Guide for remedy.

6. Check the high-humidity alarm light on the control

panel. If the light is on, refer to the Field Service

Guide for remedy.

Weekly

1. Check prefilter and afterfilter differential pressure

indicators. Replace filter elements in accordance

with manufacturer’s directions.

2. Check purge valves for leakage. Rebuild if any

leakage is evident.

3. Check exhaust muffler for discharge of air from re-

generating vessel. If no air discharges, dismantle

and clean or replace muffler core. If no air dis-

charges when muffler is removed, call your local

distributor.

Yearly

1. If equipped, check and calibrate the dew point

monitor in accordance with the manufacturer’s in-

structions.

2. Inspect desiccant in dryer vessels. Depressurize

dryer according to Shutdown instructions on page

8. Check for the following and correct as indicated:

• Oil Contamination

If desiccant is contaminated with oil, check drain

valve on prefilter. Clean, repair or replace drain

valve as necessary. Replace prefilter element,

then replace desiccant.

• Broken Desiccant (excessive dusting)

Desiccant dusting may be caused by air flow

surges, excessive air flow or pulsating air pres-

sure. Check and correct these conditions, then re-

place desiccant.

3. Replace all solenoid and butterfly valve dia-

phragms and seats.

Returns to Manufacturer

If the dryer or a component of the dryer must be returned to the

manufacturer, first call your local distributor for a return authoriza-

tion number and a shipping address. Your distributor will inform

you whether the dryer or only the component must be returned.

HRD Series Heatless Dryer (Bulletin 341) 9

Desiccant Replacement

Standard –40°F pressure dew point HRD Series heatless

dryers use activated alumina desiccant. HRD Series

heatless dryers designed to achieve a –100°F dew point

require both activated alumina and molecular sieve. To

ensure consistent dryer performance and to prevent ex-

cessive dusting or premature desiccant breakdown, use

only factory-approved grades of activated alumina and

molecular sieve when replacing desiccant.

To replace desiccant:

DANGER

EXPLOSION HAZARD

Completely vent the internal air pressure to

the atmosphere before replacing the

desiccant or performing any maintenance

work on your dryer. Pressure gauges on both

dryer vessels must indicate 0 psig.

1. Depressurize dryer according to the shutdown in-

structions on page 8. Pressure gauges on both ves-

sels must indicate 0 psig before service continues.

DANGER

SHOCK HAZARD

Portions of the electrical control circuit re-

main energized when the power switch is

turned OFF. Disconnect the main power sup-

ply to the dryer before performing mainte-

nance on the electrical system.

2. Turn off power switch on control panel.

3. Disconnect the main power supply to the dryer.

4. Lock out and tag electrical power supply in accor-

dance with OSHA requirements.

5. Place large containers under drain outlets at bottom

of vessels to collect desiccant.

6. Remove desiccant drain plug (refer to Figure 3).

7. Tap sides of vessels with rubber mallet to loosen

desiccant.

8. Remove fill plug at top of each vessel.

9. Shine flashlight through fill port and inspect inside

of vessels to be sure all desiccant is removed.

10. Replace desiccant drain plug.

11. Determine the type and amount of desiccant ac-

cording to Table 2, page 3.

CAUTION

Pouring desiccant creates a fine dust; safety

goggles, gloves and dust mask should be

worn by personnel installing desiccant. Refer

to the Material Safety Data Sheets (MSDS),

pages - for more complete information.

Do not tamp desiccant in vessels. Tamping

damages desiccant and causes dusting.

12. Pour required desiccant into vessels through fill

ports. When two types of desiccant are used, add

the proper amount of activated alumina to each

desiccant vessel first; tap vessels with rubber mallet

to ensure uniform distribution of desiccant, then

add the molecular sieve.

13. Replace fill plugs at top of vessels.

10 HRD Series Heatless Dryer (Bulletin 341)

Desiccant

Fill Plug

Desiccant

Drain Plug

Figure 3

DESICCANT DRAIN/FILL PORTS

Restart the dryer according to the start-up instructions

on page 6.

High-Humidity Alarm Field Adjustment

The high-humidity alarm is an optional feature on HRD

Series heatless dryers; it is indicated by the suffix H in

the model number on the dryer nameplate.

To set the high-humidity alarm:

1. Turn power switch OFF.

DANGER

SHOCK HAZARD

Portions of the electrical control circuit re-

main energized when the power switch is

turned OFF. Disconnect the main power sup-

ply to the dryer before performing mainte-

nance on the electrical system.

2. Open the door of the electrical control box.

3. Locate the high-humidity alarm circuit board (refer

to Figure 4).

4. A calibrated set plug (refer to Figure 5) is shipped

loose inside the electrical box. The set plug is used

to select the setting at which the high-humidity

alarm sounds. To insert the set plug, unplug the flat

brown 2-wire ribbon cable in the electrical box. In-

sert the set plug into the ribbon cable socket.

5. Turn the power switch to ON.

6. With a small slotted screwdriver, adjust P1 on the

high-humidity circuit board (Figure 4) clockwise

and counterclockwise. Find the adjustment point

where the contacts open and close. Leave adjust-

ment where the contacts just close.

NOTE: DO NOT ADJUST POTENTIOME-

TERS P2 AND P3.

7. Put a drop of lacquer on potentiometer P1 to pre-

vent vibrations from altering the setting.

8. Turn the power switch to OFF.

9. Remove the set plug and reinsert the ribbon cable.

The high-humidity alarm is now set.

To put the dryer back into service, follow the start-up

instructions on page 6.

HRD Series Heatless Dryer (Bulletin 341) 11

Figure 4

HIGH-HUMIDITY ALARM CIRCUIT BOARD

POTENTIOMETERS P1, P2 AND P3

Figure 5

SET PLUG

FIELD SERVICE GUIDE

WARNING

Compressed air can be dangerous unless

safety precautions are observed in the use of

compressed air and compressed air equip-

ment. Completely vent the internal air pres-

sure to the atmosphere before disassembling

any piping, fittings, valves or other compo-

nents and before doing any work on com-

pressed air equipment. To vent internal air

pressure, follow the shutdown instructions.

12 HRD Series Heatless Dryer (Bulletin 341)

Problem Possible Cause Remedy

Dew point too high or

too low

Inlet air flow higher than the sizing

condition.

Reduce inlet flow to sizing conditions.

Liquids entering the dryer inlet.

Check the inlet air line for liquids. Inspect prefilter and drain valve.

Clean, repair or replace automatic drain valve.

Inlet air temperature higher than

the sizing condition.

Check the compressor aftercooler and cooling system. Reduce inlet

air temperature to sizing condition.

Desiccant dusting.

Check air pressure, airflow and airflow surges and correct as neces-

sary. Replace desiccant.

Desiccant coated with oil.

Check prefilter and automatic drain valve. Replace prefilter element.

Clean, repair or replace drain valve as necessary. Consult factory

concerning need for desiccant replacement.

Mufflers plugged; excessive purge

back pressure.

Clean or replace muffler cores. If no air is discharging when mufflers

are removed, consult the factory.

Excessive pressure

drop in prefilter and

afterfilter

Filter elements dirty. Replace elements.

Excessive pressure

drop in dryer

Inlet and/or outlet screens on

desiccant towers dirty.

Clean or replace screens; follow desiccant removal instructions in

MAINTENANCE section, then disconnect inlet and outlet piping to

remove screens.

Excessive flow rate. Check flow rate of inlet air. Reduce to sizing condition.

Failure to switch

Power failure.

1. Check power with voltmeter.

2. Check dryer fuse in the electrical enclosure. Replace as neces-

sary.

Solenoid valve stuck shut. Replace solenoid coil or complete valve.

Solenoid valve stuck open. Remove, dismantle and clean.

Shuttle valve stuck. Dismantle and clean. Replace if problem continues.

Mufflers plugged; no hiss from muf-

flers when purging.

Clean or replace cores.

Low air pressure to air-operated

letdown valves.

Adjust purge air regulator to above 60 psig.

Dryer cuts off auto-

matically

Power failure.

1. Check power with voltmeter.

2. Check dryer fuse in the electrical enclosure. Replace as neces-

sary.

HRD Series Heatless Dryer (Bulletin 341) 15

NOTES:

1) ALL WIRING TO BE IN ACCORDANCE WITH

2) ALL WIRES TO BE MARKED AT TERMINALS

IN ACCORDANCE WITH THIS SCHEMATIC.

3) CIRCUIT IS SHOWN IN ITS NORMAL POSITION (DEENERGIZED)

4) DASHED LINES INDICATE FACTORY INSTALLED EXTERNAL

INDICATES CONNECTIONS TO TERMINAL STRIP.

5) TIME SETTING FOR SWITCH FAILURE ALARM-60 SEC.

ON TIME 5 SECONDS

110V-60Hz-1PH, NEMA 1, MAX RUNNING CURRENT= 1 AMP (STD)

6) ADV TIMER SETTING: OFF TIME 1 MINUTE

220V-60Hz-1PH, NEMA 1, MAX RUNNING CURRENT= 0.5 AMP (E3 OPT)

100V-50Hz-1PH, NEMA 1, MAX RUNNING CURRENT= 1 AMP (E15 OPT)

200V-50Hz-1PH, NEMA 1, MAX RUNNING CURRENT= 0.5 AMP (E35 OPT)

UTILITIES:

MANUFACTURING PROCEDURE 100-250

CONTROL CIRUIT WIRING

GND

110V-1PH-60HZ (STD)

100V-1PH-50HZ (E15 OPTION)

1LT

1TR

1SOL

2SOL

3 N

"POWER ON"

CYCLE TIMER

LEFT SIDE LETDOWN

RIGHT SIDE LETDOWN

FU,FB

STANDARD SCHEMATIC

1PS

2TR

2LT

SWITCH FAILURE OPTION (F)

FAILURE TIME DELAY RELAY

SWITCH FAILURE ALARM

"SWITCH FAILURE"

2LT

HIGH HUMIDITY OPTION (H)

HUMIDITY CONTROL

HIGH HUMIDITY ALARM

"HIGH HUMIDITY"

GND

2PS

PRESSURE SENSOR SWITCH

3 N

BARKSDALE, SPECIAL

CUSTOMER

CONNECTION

220V-1PH-60HZ (E3 OPTION)

200V-1PH-50HZ (E35 OPTION)

FU,FB

H1 H3 H2 H4

X2 X1

GND

LEFT & RIGHT TOWERS

CUSTOMER

CONNECTION

240V-1PH-50HZ (E75 OPTION)

SENSOR

DPM

DEW POINT MONITOR OPTION (W)

DEW POINT MONITOR

1PS

2TR

2CR-1

SWITCH FAILURE TIME DELAY RELAY

SWITCH FAILURE/

2PS

LEFT & RIGHT TOWERS PRESSURE SENSOR

3LT

2CR

1CR-1

ADV OPTION FOR

2LT

1CR

"SWITCH FAILURE"

1CR-2

2CR-2

"HIGH HUMIDITY"

HUMIDITY CONTROL

PREFILTER OPTION

SWITCH FAILURE & HIGH HUMIDITY OPTIONS (FH)

ADV OPTION FOR PREFILTER OPTION

2TR

CUSTOMER

CONNECTION

CUSTOMER

CONNECTION

HIGH HUMIDITY ALARM

GND

1ADV

SENSOR

LEFT CAM RISES

RIGHT CAM RISES

RIGHT CAM DROPS

LEFT CAM DROPS

STANDARD (-40 PDP)

CAM TIMER SETTINGS

STANDARD 100 PSIG OPERATING PRESSURE

42%

1SOL 2SOL 1SOL

34%

"J" OPTION (-100 PDP)

RIGHT CAM DROPS

RIGHT CAM RISES

LEFT CAM DROPS

LEFT CAM RISES

42%

58%

92%

42%

2SOL

46%

54%

96%

Electrical Schematic

16 HRD Series Heatless Dryer (Bulletin 341)

Replacement Parts

DESCRIPTION

QTY

REQ’D

Part Number

MODEL

HRD2

MODEL

HRD5

MODEL

HRD10

MODEL

HRD15

MODEL

HRD20

MODEL

HRD25

MODEL

HRD30

Desiccant Strainer 4 7DE230AV 7DE230S 7DE230S 7DE230B 7DE230B 7DE230C 7DE230C

Muffler 2 7DE135CJ 7DE135BN 7DE135BN 7DE135BP 7DE135BP 7DE135BR 7DE135BR

Muffler Core

2 7DE135AF 7DE135S 7DE135S 7DE135T 7DE135T 7DE135W 7DE135W

Relief Valve 1 7DE335EN 7DE335EN 7DE335EN 7DE335EN 7DE335EL 7DE335EL 7DE335EK

Pressure Gauge

3 7DE120Q 7DE120Q 7DE120Q 7DE120Q 7DE120Q 7DE120Q 7DE120Q

Purge Solenoid Repair Kit 1 7DE347BV 7DE347CH 7DE347CH 7DE347CH 7DE347CH 7DE347CK 7DE347CK

Purge Solenoid Valve

(NEMA 1-4)

2 7DE345KG 7DE345QJ 7DE345QJ 7DE345QK 7DE345QK 7DE345VM 7DE345VM

Purge Solenoid Valve

(NEMA 7)

2 7DE345TC 7DE345MQ 7DE345MQ 7DE345MR 7DE345MR 7DE345QA 7DE345QA

Purge Solenoid Coil

(NEMA 1-4)

2 7DE345NT 7DE345NT 7DE345NT 7DE345NT 7DE345NT 7DE346BP 7DE346BP

Purge Solenoid Coil

(NEMA 7)

2 7DE347AY 7DE347AY 7DE347AY 7DE347AY 7DE347AY 7DE347AY 7DE347AY

Delay Timer (F Option) 1 7DE270AS 7DE270AS 7DE270AS 7DE270AS 7DE270AS 7DE270AS 7DE270AS

Pressure Sensor

(F Option)

2 7DE240KD 7DE240KD 7DE240KD 7DE240KD 7DE240KD 7DE240KD 7DE240KD

Humidistat Probe (H option) 1 31DE215V 31DE215V 31DE215V 31DE215V 31DE215V 31DE215V 31DE215V

Humidistat Cable (H option) 31DE215G 31DE215G 31DE215G 31DE215G 31DE215G 31DE215G 31DE215G

Humidistat Set Plug (H

option)

1 31DE215W 31DE215W 31DE215W 31DE215W 31DE215W 31DE215W 31DE215W

Humidistat (H option) 1 31DE215T 31DE215T 31DE215T 31DE215T 31DE215T 31DE215T 31DE215T

Purge Control Valve 1 7DE295AS 7DE295AS 7DE295AS 7DE295AS 7DE295B 7DE295B 7DE295H

Repair Kit 1 7DE347AB 7DE347CV 7DE347CV 7DE347CV 7DE347CV 7DE347CV 7DE347AC

Fuse 1 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ

Switch, On-Off 1 7DE240JN 7DE240JN 7DE240JN 7DE240JN 7DE240JN 7DE240JN 7DE240JN

Desiccant 55DE116F 55DE116F 55DE116F 55DE116F 55DE116F 55DE116F 55DE116F

Lbs. desiccant per tower 28 60 95 120 165 210 285

Recommended spare parts

HRD Series Heatless Dryer (Bulletin 341) 17

Replacement Parts

DESCRIPTION

QTY

REQ’D

PART NUMBER

MODEL

HRD35

MODEL

HRD40

MODEL

HRD45

MODEL

HRD50

MODEL

HRD55

MODEL

HRD60

MODEL

HRD65

Desiccant Strainer 4 7DE230C 7DE230AE 7DE230AE 7DE230AE 7DE230AE 7DE230AE 82DE25CA

Muffler 2 7DE135BS 7DE135BS 7DE135BS 7DE135BT 7DE135BT 7DE135BT 7DE135BT

Muffler Core

2 7DE135X 7DE135X 7DE135X 7DE135Y

7DE135Y

Relief Valve 1 7DE335EK 7DE335EQ 7DE335EQ 7DE335EM 7DE335M 7DE335M 7DE335CY

Pressure Gauge

3 7DE120Q 7DE120Q 7DE120Q 7DE120Q 7DE120Q 7DE120Q 7DE120Q

Letdown/Purge Valve

Assembly (Actuator, valve,

seat)

2 7DE349BX 7DE349BY 7DE349BY 7DE349BZ 7DE349GJ 7DE297GJ 7DE297GJ

Letdown/Purge Solenoid

Valve (NEMA 1-4)

2 7DE345TT 7DE345TT 7DE345TT 7DE345TT 7DE345TR 7DE345TR 7DE345TR

Letdown/Purge Solenoid

Valve (NEMA 7)

2 7DE345TT 7DE345TT 7DE345TT 7DE345TT 7DE345TS 7DE345TS 7DE345TS

Letdown/Purge Valve Seat 2 7DE370E 7DE370F 7DE370F 7DE370G 7DE297GS 7DE297GS 7DE297GS

Solenoid Valve Coil

(NEMA 1-4)

2 7DE346BX 7DE346BX 7DE346BX 7DE346BX 7DE345NT 7DE345NT 7DE345NT

Solenoid Valve Coil

(NEMA 7)

2 7DE346BX 7DE346BX 7DE346BX 7DE346BX 7DE346BQ 7DE346BQ 7DE346BQ

Purge Control Valve 1 7DE295H 7DE295F 7DE295F 7DE295F 7DE295K 7DE295K DWG2523Q

Repair Kit 1 7DE347AC 7DE347CH 7DE347CH 7DE347CH 7DE347CH 7DE347CH 7DE347CH

Switch, On-Off 1 7DE240JN 7DE240JN 7DE240JN 7DE240JN 7DE240JN 7DE240JN 7DE240JN

Pressure Sensor

(F Option)

2 7DE240KD 7DE240KD 7DE240KD 7DE240KD 7DE240KD 7DE240KD 7DE240KD

Humidistat Probe (H option) 1 31DE215V 31DE215V 31DE215V 31DE215V 31DE215V 31DE215V 31DE215V

Humidistat Cable (H option) 1 31DE215G 31DE215G 31DE215G 31DE215G 31DE215G 31DE215G 31DE215G

Humidistat Set Plug

(H option)

1 31DE215W 31DE215W 31DE215W 31DE215W 31DE215W 31DE215W 31DE215W

Humidistat (H option) 1 31DE215T 31DE215T 31DE215T 31DE215T 31DE215T 31DE215T 31DE215T

Fuse 1 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ

Delay Timer (F Option) 1 7DE270AS 7DE270AS 7DE270AS 7DE270AS 7DE270AS 7DE270AS 7DE270AS

Desiccant 55DE116F 55DE116F 55DE116F 55DE116F 55DE116F 55DE116F 55DE116F

Lbs. desiccant per tower 366 475 600 725 875 1,025 1,200

Recommended spare parts

Quantity required, four per muffler, eight per dryer

18 HRD Series Heatless Dryer (Bulletin 341)

Replacement Parts

DESCRIPTION

QTY

REQ’D

PART NUMBER

MODEL

HRD70

MODEL

HRD75

MODEL

HRD80

MODEL

HRD85

MODEL

HRD90

MODEL

HRD95

MODEL

HRD100

Desiccant Strainer 4 82DE25CA 82DE25DA N/A N/A N/A N/A

Muffler 2 7DE135BT 7DE135BT 7DE135BT 7DE135BT 7DE135BT 7DE135BT 7DE135BT

Muffler Core

2 7DE135Y 7DE135Y 7DE135Y 7DE135Y 7DE135Y 7DE135Y 7DE135Y

Relief Valve ( ) 7DE335CY(1) 7DE335CY(1) 7DE335CY(1) 7DE335CY(4) 7DE335FZ(2) 7DE335GA(4) 7DE335CY

Pressure Gauge

3 7DE120Q 7DE120Q 7DE120Q 7DE120Q 7DE120Q 7DE120Q 7DE120Q

Letdown/Purge Solenoid

Valve Assembly

Consult Factory

Letdown/Purge Solenoid

Valve (NEMA 1-4)

Letdown/Purge Solenoid

Valve (NEMA 7)

Letdown/Purge Valve Seat 2

Solenoid Valve Coil

(NEMA 1-4)

Solenoid Valve Coil

(NEMA 7)

Purge Control Valve 1

Switch, On-Off 1 7DE240JN 7DE240JN 7DE240JN 7DE240JN 7DE240JN 7DE240JN 7DE240JN

Pressure Sensor

(F Option)

2 7DE240KD 7DE240KD 7DE240KD 7DE240KD 7DE240KD 7DE240KD 7DE60BQ

Humidistat Probe (H option) 1 31DE215V 31DE215V 31DE215V 31DE215V 31DE215V 31DE215V 31DE215V

Humidistat Cable (H option) 1 31DE215G 31DE215G 31DE215G 31DE215G 31DE215G 31DE215G 31DE215G

Humidistat Set Plug

(H option)

1 31DE215W 31DE215W 31DE215W 31DE215W 31DE215W 31DE215W 31DE215W

Humidistat (H option) 1 31DE215T 31DE215T 31DE215T 31DE215T 31DE215T 31DE215T 31DE215T

Fuse 1 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ 7DE110AJ

Delay Timer (F Option) 1 7DE270AS 7DE270AS 7DE270AS 7DE270AS 7DE270AS 7DE270AS 7DE270AS

Desiccant 55DE116F 55DE116F 55DE116F 55DE116F 55DE116F 55DE116F 55DE116F

Lbs. desiccant per tower 1,366 1,567 1,828 2,495 3,205 4,075 5,126

Recommended spare parts

Quantity required, four per muffler, eight per dryer

Ingersoll-Rand HRD30 Operator's Instruction Manual

Ingersoll-Rand HRD30 Operator's Instruction Manual

Ingersoll-Rand HRD30 Operator's Instruction Manual

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