Wilkerson DE0 Bedienungsanleitung

INSTRUCTION MANUAL FOR

WILKERSON MODELS DE0, DE1 AND DE2

COMPACT HEATLESS AIR DRYERS

OPERATIONS

DE0 - DE2

This instruction manual covers the installation, operation, maintenance and troubleshooting guide

for the Wilkerson compact heatless air dryers, models DE0, DE1 and DE2. These dryers are

designed to be installed into a compressed air system, providing ultra-dry compressed air to

continuous feed, point-of-use applications.

Instruction Manual / DE0, DE1 and DE2

Wilkerson Compact Heatless Air Dryers

GENERAL

Model

Number

DEO

DE1

DE2

10.875

13.875

16.875

4.0

2.72

1.50

1.82

3.375 ± .005

1.688 ± .016

4.38

.25

.438 ± .016

8.125

7.219

Approx.

Wt.

(lbs.)

6 3/4

7 3/4

8 3/4

Outline Dimensions

Figure 1

Top View

Front View

Outlet

Inlet

Front

Instruction Manual / DE0, DE1 and DE2

Wilkerson Compact Heatless Air Dryers

Wilkerson DE series compact heatless air dryers employ the principles of pressure swing

adsorption (PSA). The operation is fully automatic and relatively little maintenance is required.

The dryers utilize two identical desiccant towers, metering orifices, two 3-way DC operated

solenoid valves controlled by a solid state electronic timer. Wet air at line pressure enters and

flows through one of the towers where nearly all the water vapor is adsorbed while the other tower

is being regenerated. Every 30 seconds, the process is reversed, providing a continuous flow of

dry air.

In the flow schematic shown below, Valve A (energized) directs the inlet air to flow into Tower A

(drying). A portion of the dry outlet air is allowed to flow through an orifice into Tower B. This dry

purge air expands to nearly atmospheric pressure, sweeping the water out of the desiccant as it

flows through Tower B (regenerating) and out of the Valve B (de-energized) exhaust port. The

timer controls the cycling of normally closed solenoid valves.

The orifices are fixed and are sized by the factory based on flow, pressure and dew point required.

Flow Schematic

Figure 2

CHECK

VALVES

PURGE

ORIFICE PURGE

ORIFICE

DESICCANT

TOWER A DRYAIR

TO APPLICATION

SOLENOID

VALVE A SOLENOID

VALVE B

DESICCANT

TOWER B

PURGEAIR

EXHAUST

WETAIR IN

DEO, DE1 and DE2

DESCRIPTION OF OPERATION

Instruction Manual / DE0, DE1 and DE2

Wilkerson Compact Heatless Air Dryers

INSTALLATION AND OPERATION

NOTE

Wilkerson DE series compact heatless dryers have been

thoroughly inspected and tested at the factory and are in

proper working condition.

A. Initial Inspection – Remove the air dryer from the shipping carton. Inspect the exterior and

remove the electrical cover and inspect the interior components for any shipping damage.

NOTE

Any damage noticed at this time must be brought to the

immediate attention of the carrier and a freight claim must

be filed.

B. Warranty – Please read this instruction manual carefully before installing the air dryer.

Failure to follow proper instructions could result in damage to the equipment and may void

the product warranty.

EXCEPT as otherwise specified by the manufacturer, this product

is specifically designed for compressed air service and use with

any other gas or liquid is a misapplication. Use with or injection

of certain hazardous liquids or gases in the system (i.e., alcohol

or liquid petroleum gas) could be harmful to the unit and result in

a combustible condition or cause hazardous external leakage.

Manufacturers' warranties are void in the event of a misapplication

and manufacturer assumes NO RESPONSIBILITY for any

resulting loss. Before using equipment with fluids or gases other

than air, or for non-industrial applications, consult Wilkerson

Corporation for written approval.

C. Installation/Mounting – The DE series air dryers are designed for either wall or in-line

mounting. Models DE0, DE1, and DE2 allow for four alternate methods of piping. All dryers

require a clean ambient environment for proper operation. Normally, most locations where

ambient temperatures range between 40˚F and 125˚F are suitable for installation since drying

efficiency is more dependent on the temperature of the compressed air flowing through the

unit. Operating a unit at temperatures which could result in freezing may cause damage to the

dryer. Do not operate at temperatures so low that freezing is a possibility. The heat of internal

desiccant adsorption and normal solenoid valve operation may cause the unit to become

warm. This is normal and does not indicate a malfunction of the unit. The warm temperature

is more pronounced in a dryer operating at low flow rate.

1. Install dryer where ambient temperatures are between 40°F (4.4°C) and 125°F (52°C).

2. Mount dryer in a vertical position and with the desiccant towers at the top.

CAUTION

3. Piping connections: For maximum flow, INLET and OUTLET piping should be schedule 40

pipe or equivalent I.D. tubing. DE0, DE1 and DE2 inlet and outlet porting is 1/4" female

NPT, purge porting is 1/8" female NPT.

NOTE

If purge air is required to be piped to a remote location, it is neces-

sary to use slightly oversized tubing to prevent back-pressure.

Restricting the purge flow can cause the dryer to malfunction.

4. Use Teflon tape or pipe sealant on threads. Check all air connections for leakage, using

soap solution prior to putting dryer into permanent service.

5. It is recommended that a bypass line with shut-off valves be installed to provide constant

air flow, should the dryer require servicing.

6. Always install a 5-micron particulate prefilter and a coalescing filter upstream to remove

entrained particulates, moisture and oil. A 0.5-micron afterfilter should be installed down-

stream to remove any desiccant dust that may migrate from the desiccant towers.

Factory Recommended Dryer Installation

Figure 3

D. Operating Specifications – The DE0, DE1, and DE2 series compact heatless dryers

can be sized to operate from 40 to 150 PSIG (2,7 to 10,3 bar).

1. The dryers must be operated in accordance with the factory sizing charts and original

customer requirements in order to achieve desired dewpoints. Inlet pressure, inlet

temperature, and outlet flow conditions are always specified when purchased.

2. Maximum inlet air temperature is 125°F (52°C).

3. Do not operate dryers in temperatures so low that freezing is a possibility.

E. Electrical Connections – Before wiring, check the dryer nameplate for electrical characteris-

tics. Standard electrical characteristics are 115 Volt, 50/60Hz operation. Models operating on

230 Volt, 50/60Hz operation are available.

Instruction Manual / DE0, DE1 and DE2

Wilkerson Compact Heatless Air Dryers

5-MICRON

PREFILTER

WITH AUTO

DRAIN

MICROALESCER OPTIONAL

REGULATOR

SHUT-OFF

VALVE AIR DRYER

WITH MOISTURE

INDICATOR

BYPASS LINE

BYPASS SHUT-OFF VALVE

SHUT-OFF

VALVE

MOISTURE

INDICATOR

0.5-MICRON

POSTFILTER OPTIONAL

REGULATOR

1. IMPORTANT! No overload protection is provided in the dryer and unit should be

wired into a protected circuit. A knockout hole is provided for electrical connection.

2. The dryer can be grounded by attaching a ground wire to the timer assembly bracket

screw. See wiring diagram.

G. Solid State Timers – The solid state timers used in the DE series dryers permit the

simultaneous switching of the solenoid valves every 30 seconds. The timers are equipped

with a one hour memory capability. If power is interrupted, the dryer will resume operation

at the same point in the cycle when power is restored.

Wiring Diagram

Figure 4

Instruction Manual / DE0, DE1 and DE2

Wilkerson Compact Heatless Air Dryers

Instruction Manual / DE0, DE1 and DE2

Wilkerson Compact Heatless Air Dryers

MAINTENANCE INSTRUCTIONS

A. Field Adjustments – Following proper installation of the Wilkerson DE heatless air dryer, no

field adjustments are necessary. No lubrication is required on the dryer.

B. Six-Month Check – It is recommended that every 6 months of operation, unit be thoroughly

inspected. Inspection should include audible inspection of the towers switching and purge flow.

Visual inspection should include checking for excessive dirt or oil fouling and for desiccant

attrition at the outlet and purge exhaust area. This involves removal of the manifold cover.

Remove mufflers, if installed, and check for excessive pressure drop by blowing through the

muffler. If large resistance is felt, mufflers should be replaced.

C. One-Year Check – Annual inspections should be more thorough and should include removal

of the solenoid valves and purge orifice glands for in-depth inspection of internal wear or dete-

rioration of the solenoid valve parts, Viton check balls, and for plugging of the purge orifices.

D. Purge Orifices – If the operating conditions change from the label specifications (eg. inlet

pressure, outlet flow), it is necessary to replace the purge orifices. There are two orifices in the

DE series air dryers. The orifices are extremely critical parts in determining the performance of

the dryer and no attempt should be made to enlarge or reduce the hole size on the side of the

hex orifice gland. Orifices of the proper size must be obtained from your local Wilkerson

distributor. The label on the dryer should also be changed, noting the present operating

conditions. Purge orifices are screwed into the manifold beneath the desiccant chambers. To

change orifices, unscrew the hex orifice glands using a standard 7/8" socket wrench.

E. Cycle Timer – The solid state cycle timer requires no maintenance and can be replaced in

field.

F. Desiccant Towers – Improper packing of the desiccant chambers can cause channeling of the

air stream and improper drying. For this reason, NO ATTEMPT SHOULD BE MADE TO

REPACK DESICCANT CHAMBERS IN THE FIELD. Replacement chambers should be

obtained from your local Wilkerson distributor.

G. Operating Air Dryer Improperly – Following improper dryer operation, i.e., low inlet pressure,

high air temperature or high outlet flow, shut off the outlet flow from the air dryer for several

hours to allow the dryer to operate, purging the desiccant towers of excessive moisture. If this

does not restore dryer to proper working order, consult the troubleshooting guide at the end of

this instructional manual.

H. Oil Contamination – Oil contamination of the desiccant towers will cause complete loss of

drying capability. If oil is detected in the desiccant towers or any other components, it will be

necessary to install replacement towers in order to restore dryer to normal operation.

I. Replacement Parts – Contact your local authorized Wilkerson distributor for dryers or replace-

ment parts.

IMPORTANT INFORMATION:

The installation of parts not supplied by

Wilkerson will void the warrant of our air dryers.

For replacement part information, contact Wilkerson Applications Engineering toll free at

1-888-223-5126.

Instruction Manual / DE0, DE1 and DE2

Wilkerson Compact Heatless Air Dryers

DE0, DE1 AND DE2 PARTS IDENTIFICATION

Parts Identification

Figure 5

Instruction Manual / DE0, DE1 and DE2

Wilkerson Compact Heatless Air Dryers

Instruction Manual / DE0, DE1 and DE2

Wilkerson Compact Heatless Air Dryers

PARTS DESCRIPTION – WILKERSON HEATLESS DRYERS

ITEM NO. PART QTY. PER PART DESCRIPTION INCLUDES

NUMBER DRYER ITEMS

1 DRP-94-101 2 Desiccant Tower, 6" New, DE0 2

DRP-94-102 2 Desiccant Tower, 9" New, DE1 2

DRP-94-103 2 Desiccant Tower, 12" New, DE2 2

DRP-94-104 2 Desiccant Tower, 6" REPACK W/EXCHANGE, DE0 2

DRP-94-105 2 Desiccant Tower, 9" REPACK W/EXCHANGE, DE1 2

DRP-94-106 2 Desiccant Tower, 12" REPACK W/EXCHANGE, DE2 2

2 2 O-RING TOWER

3 2 O-RING, INNER ORIFICE

4* DRP-94-2XX 2 PURGE ORIFICE ASSY. (SPECIFY ORIFICE NUMBER) 3,5

5 2 O-RING, OUTER ORIFICE

6 DRP-94-161 2 BALL, VITON CHECK VALVE

7 DRP-94-163 1 HEX PLUG, INDICATOR PORT 8

8 1 O-RING, INDICATOR PORT

9 1 NAMEPLATE

10 2 DRIVE SCREW

11 6 SCREW, #10-24 X 5/8, PAN HD

12 DRP-94-164 2 PIPE PLUG, 1/4-18 SOCKET HD.

13 DRP-94-187 2 MOUNTING BRACKET

14 4 O-RING, BRACKET

15 DRP-94-166 1 MANIFOLD WITH BRACKETS 11, 13, 14

17 DRP-94-185 2 SOLENOID VALVE, 53 VDC (115 VAC DRYERS) 36-41

DRP-94-186 2 SOLENOID VALVE, 106 VDC (230 VAC DRYERS) 36-41

25 4 SCREW #6-32 X 3/8 PAN HD.

26 DRP-94-184 1 MANIFOLD COVER

27 DRP-94-181 1 TIMER, SOLID STATE (115 VAC DRYERS)

DRP-94-182 1 TIMER, SOLID STATE (230 VAC DRYERS)

28 2 NUT, KEPS 8-32

29 2 SCREW, 8-32 X 1" BH

30 2 SCREW, 8-32 X 1/4" BH

31 2 SCREW, 6-32 X 1/2" BH

32 1 PLATE, ADAPTER SS TIMER

33 1 BRACKET, MTG SS TIMER

34 1 COVER, TERMINAL

42 DRP-94-162 2 SPRING, CHECK VALVE

NOT DRP-94-151 1 O-RING KIT 2,3,5,8,14

SHOWN

NOT DRP-94-169 1 MOISTURE INDICATOR

SHOWN

NOT DRP-94-173 1 MAINTENANCE KIT, DRYER 2,3,5,6

SHOWN 17(REBUILD

PARTS ONLY), 42

NOT DRP-94-188 2 EXHAUST MUFFLER

SHOWN

When ordering parts, always state the dryer Model Number and Serial Number.

*Orifice number must be specified. This can be obtained from nameplate data.

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