SPX Hankison DHW 13, Hankison DHW 30, Hankison DHW 7, Hankison DHW 35, Hankison DHW 50 Instruction Manual

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Page 1

INSTRUCTION MANUAL

DHW Series

Pressure Swing Desiccant Compressed Air Dryer Models 7 through 50 scfm

FORM NO.: 3215738 R EVISION: 07/2014 READ AND U NDE RSTAND THIS MANUAL PRI OR TO OPERATING OR SERVICI NG THI S PRODUCT.

Page 2

Contents

1.0 GENERAL INFORMATION ............................................... 2

2.0 DESCRIPTION ................................................................ 3

3.0 INSTALLATION ................................................................ 4

4.0 OPERATION ................................................................... 7

5.0 MAINTENANCE .............................................................. 9

WARRANTY .......................................................................... 11

IMPORTANT READ PRIOR TO STARTING THIS EQUIPMENT

UNPACKING

This shipment has been thoroughly checked, packed and inspected before leaving our plant. It was received in good condition by the carrier and was so acknowledged.

1) Check for Visible Loss or Damage. If this shipment shows evidence of loss or damage at time of delivery to you, insist that a notation of this loss or damage be made on the delivery receipt by the carrier’s agent.

2) Check for Concealed Loss or Damage. When a shipment has been delivered to you in apparent good order, but concealed damage is found upon unpacking, notify the carrier immediately and insist on his agent inspecting the shipment. Fifteen days from receipt of shipment is the maximum time limit for requesting such inspection. Concealed damage claims are not our responsibility as our terms are F.O.B. point of shipment.

1.0 General Information

CAUTION

A. Pressurized devices-

This equipment is a pressure containing device.

• Donotexceedmaximumoperatingpressureasshown

on equipment serial number tag.

• Makesureequipmentisdepressurizedbeforeworking

on or disassembling it for servicing.

B. Electrical-

This equipment requires electricity to operate.

• Installequipmentincompliancewithnationalandlocal

electrical codes.

C. Breathing air-

• Airtreatedbythisequipmentmaynotbesuitablefor

breathing without further puriﬁcation. Refer to OSHA standard 1910.134 or other applicable standards for the requirements for breathing quality air.

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2.0 Description

Push to by-pass dryer

2.1 Function

Dual tower regenerative desiccant dryers are utilized to dry compressed air to dew points below the freezing point of water or reduce the moisture content to low levels for use in critical process applications.

Air is dried by using two identical towers, each containing a desiccant bed. While one tower is on-stream drying the compressed air, the other tower is off-stream being regenerated (reactivated, i.e., dried out).

Desiccant dryers lower the dew point by adsorbing most of the water vapor present onto the surface of the desiccant. Adsorption occurs until an equilibrium is reached between the partial pressure of the water vapor in the air and that on the surface of the desiccant.

Desiccant can then be regenerated by desorbing the water collected on its surface. Regeneration occurs by expanding a portion of the dried air to atmospheric pressure. This very dry air (called purge air) causes the moisture to desorb from the desiccant and then carries the desorbed water out of the dryer.

2.2 Operation

Compressed air enters the dryer and is directed to TOWER 1 through valve (A) and then exits the dryer through shuttle valve (B). A portion of the dried air is throttled to near atmospheric pressure by means of an oriﬁce (C). This extremely dry, low pressure air ﬂows through and regenerates the desiccant in TOWER 2 and is then exhausted through purge/ repressurization valve (D) and exhaust mufﬂer (E) to atmosphere.

After a set time, the automatic solid state timer closes purge/repressurization valve (D) allowing TOWER 2 to repressurize slowly.

At the end of 2 minutes, valve (F) opens and Tower 1 depressurizes. The main air ﬂow is now dried by TOWER 2 while TOWER 1 is regenerated.

2.3 Air By-Pass Assembly

An optional air by-pass assembly is available for all models. When ordered with the dryer, the by-pass assembly is factory installed inside the dryer cabinet. Make sure the by-pass assembly is in the desired mode: "Dry" (compressed air ﬂow through the dryer) or "By-pass" (compressed air by-passes the dryer).

2.3.1 Models 7 and 13

The by-pass assembly includes a by-pass valve with a manually operated spool. One end of the spool is marked "Push to Dry" and the other end is marked "Push to Bypass". To select the desired mode, remove the locking pin, push and fully depress the appropriately marked end of the spool, and install the locking pin in the opposite end.

Locking Pin

OUT

Figure 2a – Air Bypass Assembly

Models 7 and 13

2.3.2 Models 20, 25, 30, 35, and 50

The by-pass assembly includes two manually operated threeway valves. To select "Dry" mode, rotate the valve handles so that the arrows point away from each other. To select "By-Pass" mode, rotate the valve handles so that the arrows point toward each other.

Dry Mode

Models 7 and 13 Optional by-pass

Push to Dry

TOWER

Figure 1 – Flow Schematic

Models 7 through 50

TOWER

By-Pass Mode

Figure 2b – Air Bypass Assembly

Models 20 through 50

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3.0 Installation

3.1 Dimensions, Connections, Weight

MODEL

NUMBER

7 13 20 25 30 35 50

DIMENSIONS in (mm) CONNECTIONS

A B C D E F H J K M INLET OUTLET

31.09 (790)

37.94 (964)

2.46

(62.5)

17.52 (445)

24.37 (619)

AIR INLET

1.15 (29)

1.68 (43)

DIFFERENTIAL PRESSURE

INSTRUCTION TAG

15.23 (387)

15.23 (387) 21 (533) 21 (533) 21 (533) 21 (533)

INDICATOR

FIELD MOUNTED

PREFILTER

INLET

AUTOMATIC DRAIN

6.69 (170)

8.54 (217)

ON/OFF SWITCH

TOWER

INDICATING

LIGHTS

3.74 (95)

6.73 (171)

30.5 (775)

31.6 (803)

43.3 (1100)

C D

3.74 (95)

4.25 (108)

5.31 (135)

6.22 (158)

27.5 (699)

39.3 (998)

1/2" NPT (F) 1/2" NPT (F) 1/2" NPT (F) 1/2" NPT (F) 1/2" NPT (F) 1/2" NPT (F) 1/2" NPT (F)

A B

SERIAL

NO. TAG

(INSIDE COVER)

1.69 (43)

FIELD MOUNTED

AFTERFILTER

OUTLET

PURGE MUFFLER

WEIGHT

lb (kg)

1/2" NPT (F) 1/2" NPT (F) 1/2" NPT (F) 1/2" NPT (F) 1/2" NPT (F) 1/2" NPT (F) 1/2" NPT (F)

MOUNTING SLOT DETAIL

55 (25) 60 (27) 71 (32) 93 (42) 93 (42) 99 (45)

132 (60)

1/8" R.

5/8"

1/4" R.

BACK OF ENCLOSURE

ELECTRICAL ENTRY

Maximum Operating Pressure: 150 psig, 10.5 kgf/cm

6' POWER CORD (SEE NOTE 1)

Maximum Operating Temperature: 120°F, 49°C

SEE MOUNTING SLOT DETAIL

2.36 (60)

NOTE:

1. Dimension "A" applies only to units equipped with optional preﬁlter and afterﬁlter package.

2.36 (60)

Speciﬁc dimensions of ﬁlters available upon request.

2. Connection sizes valid with or without ﬁlters.

3. Weight applies to unit only, add 6-1/2 lbs. (3 kg) to weight for optional ﬁlter package when speciﬁed.

Figure 3 Dimensional Drawing

Page 5

3.2 Electrical Speciﬁcations

12 1

DESICCANT

DRYER

COMPRESSOR

AFTERCOOLER

SEPARATOR

PREFILTERS

AFTERFILTERS

MODEL WATTS

7 13 20 25 30 35 50

27.5

31.8

33.0

17.0

ELECTRICAL

CONNECTION

L1 L2 E

GROUND

LEGEND

All Models

All Models SW1 On/Off Switch

SOL.1

SOL.2

SOL 1 Left Purge Valve

SOL 2 Right Purge Valve

FG S2 A2 FG S1 A2 FG AC1 AC2

SOL.1 OUT

SOL.2 OUT

PCB

3.3 Dryer Location in a Compressed Air System

NOTE: Air Compressor should be adequately sized to handle

air system demands as well as purge loss. Failure to take this into account could result in overloading air compressors and/or insufﬁcient air supply downstream.

NOTE: It is desirable to install dryer where compressed air is at the lowest possible temperature (downstream of aftercoolers) and the highest possible pressure (upstream of pressure reducing valves) without exceeding the maximum working pressure.

A. Aftercooler/separator - Compressed air entering dryer

must be cooled to at least 120°F (49°C). Use aftercooler and separator if higher temperatures are present.

SW1

Figure 4 Electrical Hook-up

MAIN POWER

NOTE: Installation of a refrigerated dryer ahead of a pres-

sure-swing desiccant dryer does not increase desiccant dryer capacity or reduce purge ﬂow requirements. However, if necessary, a cooling unit can be installed ahead of the desiccant dryer to reduce the inlet air temperature to the dryer, producing a correspondingly lower outlet dew point.

B. Preﬁlters - Adequate ﬁltration is required upstream of

the dryer in order to protect the desiccant bed from contamination. The following ﬁlters are recommended:

1. Air Line Filter - On compressed air systems utilizing non-lubricated (oil-free) air compressors, use to protect desiccant bed from solid and liquid contamination. On systems with lubricated compressors, if bulk liquid is present, use as a preﬁlter ahead of the oil aerosol removal ﬁlter.

2. Oil Aerosol Removal Filter - On systems with lubricated compressors, use to remove oil aerosols and protect desiccant bed from oil contamination.

C. Desiccant dryer

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D. Afterﬁlters - To ensure downstream air purity (prevent

desiccant dust from traveling downstream) adequate ﬁltration down-stream of the dryer is required. Depending on the degree of purity you require from your compressed air system, the following ﬁlters are recommended:

1. Air Line Filter - Use as an afterﬁlter to remove desiccant ﬁnes and protect downstream components from solid particles 1 micron and larger. Filters for ﬁner solid particle ﬁltration are available.

2. Oil Vapor Adsorber - Use as an afterﬁlter to remove oil vapor and its subsequent taste and odor and to protect downstream components from solid particles

0.01 micron and larger.

NOTE: By-pass lines and isolation valves are recom-

mended so that maintenance work can be performed without shutting off the air supply.

IMPORTANT: The compressed air supply inlet should be periodically checked to ensure that equipment design speciﬁcations are not exceeded. Normally the compressor installation includes intercoolers, aftercoolers, separators, receivers, or similar equipment which adequately pretreat the compressed air supply in order to avoid excessively high air temperatures and liquid slugging of down-stream equipment.

3.4 PreFilter and AfterFilter Installation

If supplied, install Preﬁlter and Afterﬁlter.

NOTE: When installing, hold bulkhead ﬁtting on dryer with wrench and thread ﬁlter on by hand.

A. Install preﬁlter (F04-HF-DG1) ahead (upstream) of dryer.

Use nipple supplied to connect ﬁlter to inlet port of dryer.

B. Install afterﬁlter (F04-PF-TG1) downstream of dryer. Use

nipple supplied to connect ﬁlter to outlet port of dryer.

NOTE: Observe arrows on differential pressure gauge to ensure proper ﬂow direction through ﬁlter.

AFTERFILTER

MUFFLER

To Downstream Air Lines

From Compressor

PREFILTER

NIPPLE NIPPLE

CUSTOMER ASSEMBLY

INSTRUCTIONS

These instructions MUST be followed prior to mounting of dryer enclosure.

1. Connect prefilter and afterfilter to enclosure (if applicable).

2. Mount dryer.

3. Connect to inlet, outlet, and purge connections. (see NOTE)

NOTE: If the equipment is to dry (or reactivate with) a gas

other than air, the outlets of the safety valve, reactivation gas outlet line, blow down valves, etc. are to piped away to a safe location (by purchaser). In piping away gas, do not pipe upward without adequate arrangements to prevent trapping condensation.

4. Install moisture indicator downstream of dryer outlet (if applicable).

3.5 Wall-mounting

Four holes are provided in rear of cabinet. Attach cabinet to wall using four (4) screws. User is responsible for selecting screws of the appropriate strength and ensuring the wall mounting surface can safely support the weight of the dryer (See Section 3.1).

3.6 Piping

Connect air line from compressor to inlet of preﬁlter or dryer. Connect downstream air line to outlet of afterﬁlter or dryer.

3.7 Electrical connection

Check to see that power supply to dryer is the same as the power requirements indicated on the identiﬁcation label. Install plug into receptacle of proper voltage or hardwire to pigtails and ground screw inside cabinet.

3.8 Mufﬂer Installation

Install mufﬂer (packaged separately inside dryer shipping box) to ﬁtting on side of cabinet.

3.9 Moisture Indicator Installation

Install the moisture indicator (shipped separately inside of cabinet) directly into the pipe line anywhere in air/gas system where moisture level is to be monitored. If indicator is installed parallel to main line, make sure enough of a restriction exists in main line to force adequate ﬂow through indicator.

Figure 5

3.10 Initial desiccant charge

The dryer is shipped complete with desiccant and ready to operate after piping and electrical connections are made.

Page 7

4.0 Operation

4.1 Start-up

A. During the initial start-up, slowly pressurize dryer to full

line pressure and check entire system for leaks. Depressurize and correct any leaks.

B. Energize the Dryer On-Off switch located on the enclo-

sure cover (Power-on light should illuminate).

NOTE: If dryer is installed with either internally or externally mounted air by-pass valve, make certain that by-pass valve is closed to prevent untreated air from ﬂowing downstream.

4.2 Inlet, Purge, and Outlet Flows @ 100 psig (7 kgf/cm2)

A. Inlet Flows

1. Maximum Inlet Flow at Rated Conditions For maximum inlet ﬂow at rated conditions refer to

Table 1.

TABLE 1 Inlet and Purge Flows @ 100 psig

MODEL INLET FLOW (1)

-40°F (-40°C) -100°F (-73°C) Average Maximum

7 13 20 25 30 35 50

1. Inlet ﬂows are established in accordance with CAGI (Compressed Air and Gas Institute) standard ADF-200, Dual Stage Regenerative Desiccant Compressed Air Dryers - Methods for Testing and Rating. Conditions for rating dryers are: inlet pressure - 100 psig (7 kgf/cm2); inlet temperature - saturated at 100°F (38°C).

2. Average Purge Flow is the total amount of air used to purge and repressurize off-stream towers averaged over the cycle time. Maximum Purge Flow is the ﬂow rate through the off-stream tower during that portion of the cycle the purge/repressurization valve is open.

7.3 (12) 13 (22) 20 (34) 25 (42) 30 (51) 35 (59) 50 (85)

scfm (m3/h)

5.6 (9.5) 10 (17) 16 (27) 20 (34) 24 (41) 28 (48) 40 (68)

PURGE FLOW (2)

scfm (m3/h)

1.5 (2.5)

2.7 (4.6)

4.2 (7.1)

5.1 (8.7)

6.2 (11)

7.2 (12)

10.2 (17)

2.0 (3.4)

3.7 (6.3)

5.5 (9.3)

6.8 (12)

8.2 (14)

9.6 (16)

13.6 (23)

2. Maximum inlet ﬂow at various pressures To determine maximum inlet ﬂow at inlet pressures

other than 100 psig (7kgf/cm2), multiply inlet ﬂow from Table 1 by multiplier from Table 2 that corresponds to system pressure at inlet of dryer.

3. Maximum inlet ﬂow at various temperatures To determine maximum inlet ﬂow at inlet tempera-

tures other than 100°F (38°C), multiply inlet ﬂow from Table 1 by multiplier from Table 3 that corresponds to system temperature at inlet of dryer.

B. Purge Flow

For maximum and average purge ﬂows at 100 psig (7 kgf/cm2) refer to Table 1.

1. Maximum Purge Flow Maximum Purge Flow (MFP) is the amount of purge

ﬂowing through the off-stream tower when the purge/repressurization valve is open. After the purge/ repressurization valve closes, the purge ﬂow will gradually decrease as the off-stream tower repressurizes to line pressure. Refer to Table 1 for Maximum Purge Flows at 100 psig (7kgf/cm2).

TABLE 2 Capacity Correction Factor for various inlet pressures

INLET

PRESSURE

Multiplier 0.31 0.42 0.54 0.73 0.83 1.00 1.09 1.17 1.26 1.35 1.44

TABLE 3 Capacity Correction Factor for various inlet temperatures

INLET

TEMPERATURE

Multiplier 1.00 0.98 0.96 0.93 0.89

TABLE 4 Purge Flow Correction Factor for various inlet pressures

INLET

PRESSURE

Multiplier 0.55 0.64 0.73 0.82 0.91 1.00 1.09 1.17 1.26 1.35 1.44

TABLE 5 Outlet pressure dew points at Moisture Indicator color change

INLET TEMP. °F

OUTLET P.D.P. °F

psig 50 60 70 80 90 100 110 120 130 140 150

kgf/cm23.5 4.2 4.9 5.6 6.3 7.0 7.7 8.4 9.1 9.8 10.5

°F 100 and below 105 110 115 120

°C 38 and below 41 43 46 49

psig 50 60 70 80 90 100 110 120 130 140 150

kgf/cm23.5 4.2 4.9 5.6 6.3 7.0 7.7 8.4 9.1 9.8 10.5

(°C)

35 (2)40(4)50(10)60(16)70(21)80(27)90(32)

-34

-28

(-37)

(-33)

-22

(-30)

100 (38)

-16

-10

(-27)

(-23)-4(-20)3(-16)9(-13)15(-9)21(-6)

110

(43)

120 (49)

Page 8

2. Average Purge Flow The Average Purge Flow (APF) is the actual amount of

ﬂow averaged over the entire purge/repressurization cycle. It includes the maximum purge ﬂow (MFP) for a set amount of the purge/repressurization time and the volume of air used for repressurization. Refer to Table 1 for Average Purge Flows at 100 psig.

3. Purge ﬂows at pressures other than 100 psig To determine Maximum or Average Purge Flow at inlet

pressures other than 100 psig, multiply purge ﬂow at 100 psig from Table 1 by the multiplier from Table 4 that corresponds to system pressure at inlet to dryer.

C. Outlet Air Flow

1. Minimum Outlet Flow Determine minimum outlet ﬂow available from dryer

by subtracting Maximum Purge Flow from inlet ﬂow to dryer.

NOTE: Air compressor should be adequately sized to

handle air system demands as well as purge loss. Failure to do so could result in overloading air compressors and/or insufﬁcient air supply downstream.

2. Average Outlet Flow Determine average outlet ﬂow available by subtracting

Average Purge Flow from inlet ﬂow to dryer.

NOTE: Average outlet ﬂow may be used to determine

available downstream air supply if a storage vessel (receiver tank) of sufﬁcient volume is available between dryer and point of air usage. Otherwise use 3.2.3.1 To compute downstream air available.

EXAMPLE:

Find maximum inlet ﬂow, maximum and average purge ﬂows, and minimum and average outlet ﬂows for a 13 scfm unit operated at 120 psig. Dryer will operate with an inlet air ﬂow of 14 scfm.

Step 1: Find Maximum Inlet Flow by multiplying Maximum Inlet Flow at Rated Conditions from

Table 1 by Inlet Pressure Correction Factor from Table 2 and Inlet Temperature Correction Factor from Table 3: 13 x 1.17 x 1.00 = 15.2 scfm.

Step 2: Find Maximum Purge Flow by multiplying

Maximum Purge Flow at 100 psig from Table 1 by Purge Flow Correction Factor from Table 4:

3.7 x 1.17 = 4.3 scfm, the maximum purge ﬂow.

Step 3: Find Average Purge Flow by multiplying Average

Purge Flow at 100 psig from Table 1 by Purge Flow Correction Factor from Table 4: 2.7 x 1.17= 3.2 scfm, the average purge ﬂow.

Step 4: Find Minimum Outlet Flow available by subtracting

Maximum Purge Flow (Step 2) from inlet ﬂow of 14 scfm: 14 - 4.3 = 9.7 scfm.

Step 5: Find Average Outlet Flow available by subtracting

Average Purge Flow (Step 3) from inlet ﬂow of 14 scfm: 14 - 3.2 = 10.8 scfm.

4.3 Operating Conditions

A. Maximum Working Pressure: 150 psig (10.5 kgf/cm2)

B. Minimum Working Pressure: 50 psig (3.5 kgf/cm2)

It is recommended that the air dryer be operated at the

highest available pressure not exceeding the maximum working pressure since the dryer capacity increases and % of purge air decreases at higher pressures.

C. Maximum Operating Temperature: 120°F (49°C)

4.4 Operational Check Points

A. Check periodically that there is power to the unit - Power

on light is on.

B. If unit is equipped with optional moisture indicator, check

at least once a day. Outlet relative humidity of the desiccant dryer is indicated by the color change humidity indicator. Green indicates R.H. below 3% and yellow indicates R.H. above 3%. Table 5 indicates outlet dew point when moisture indicator changes from green to yellow at various inlet temperatures. During startup the indicator may be yellow, however, it should begin to change to green within 4 hours.

C. If supplied with optional preﬁlter/afterﬁlter. Check that

indicators are in green area. If indicator is in red area element replacement is necessary.

4.5 Dryer Shutdown

To shut down the dryer, de-energize using the on-off switch (Power-on light extinguished). Unit will remain pressurized.

4.6 Depressurization

To depressurize unit A. Open by-pass valve (if one is installed) and close inlet and

outlet valves.

B. Run timer through a complete tower change cycle or

until all air has been exhausted from the dryer.

All

Models

All

Models

SOL1 Left Purge Valve Closed Closed Closed Open

SOL2 Right Purge Valve Closed Open Closed Closed

LED Left Tower Flashing On Flashing Off

LED Right Tower Flashing Off Flashing On

4 MINUTE CYCLE TIMING CHART

Cycle Time (min:sec)

0:00 - 0:30 0:30 - 2.00 2:00 - 2:30 2:30 - 4:00

Page 9

5.0 Maintenance

CAUTION: The heatless desiccant dryer is a pressure containing device. Depressurize before servicing. (See section 4.6.)

5.1 Desiccant Replacement

IMPORTANT: The use of the correct replacement desiccant

is necessary for proper drying operation. Never use hygroscopic salts of the type commonly used in “deliquescent” type dryers.

A. Frequency of Desiccant Replacement - Desiccant should

be replaced whenever the required dew point cannot be maintained while the dryer is being operated within its design conditions and there are no mechanical malfunctions.

NOTE: Desiccant life is determined by the quality of the

inlet air. Proper ﬁltering of the inlet air will extend the life of the desiccant.

B. Procedure for Desiccant Replacement

1. Depressurize and de-energize the dryer.

2. Remove front panel from cabinet.

3. Disconnect tubing from top and bottom of desiccant towers and unscrew strainer assemblies. Remove the mounting screws from the outlet shuttle valve mounting bracket to aid in disconnecting the tubing at the top of the towers.

NOTE: Be prepared to catch the desiccant being

removed in a container. Desiccant will readily pour out when bottom strainer is removed.

4. Allow the spent desiccant to drain from the towers.

5. Replace bottom strainer assemblies.

6. Fill the desiccant drying towers as full as possible with dry desiccant.

7. Replace top strainer assemblies.

8. Reinstall tubing to top and bottom of desiccant towers.

C. Ensuring Desiccant Dryness

1. Replacement desiccant is shipped in air tight containers. Keep containers closed until use to avoid moisture contamination. If desiccant is exposed to air it can be heated in an oven at 400°F for four hours before use, or the next procedure can be used.

2. If the dryer is not reﬁlled with dry desiccant, it will be necessary to operate the dryer on 100% purge for approximately twenty-four hours to dry the desiccant.

5.2 Preﬁlter/Afterﬁlter Maintenance

A. Element Replacement

1. For maximum ﬁltration efﬁciency, replace element annually or when pressure drop reaches 4.3 psi (0.3 bar) (indicator in red area), whichever occurs ﬁrst.

B. Procedure for Element Replacement

WARNING: THIS FILTER IS A PRESSURE CONTAINING DEVICE. DEPRESSURIZE BEFORE SERVICING.

1. Isolate ﬁlter (close inlet and outlet valves if installed) or shut off air supply.

2. Depressurize ﬁlter by slowly opening manual drain valve.

3. Remove bowl by unscrewing the bowl from the ﬁlter head using hand, strap wrench or C spanner, and pulling bowl straight down.

4. Clean ﬁlter bowl.

5. Replacing complete element.

a) Pull off old element and discard.

b) Make certain that the old and new element have

the same part number and the end caps are the same color.

c) Wipe the wall inside the ﬁlter head to remove any

dirt.

d) Lubricate the new element o-ring on the element

top cap.

e) Align the slot in the element top cap with the pro-

jection inside the ﬁlter head.

Projection

Element Slot

Amount of desiccant required for complete change

MODEL DESICCANT REQUIRED

lb (kg)

7 13 20 25 30 35 50

12.8

19.4

28.7

33.6

47.6

(3.2) (5.8)

(8.8) (13.0) (13.0) (15.2) (21.6)

O-Ring

Figure 6

f) Insert the element into the head making sure the

element slot and the projection inside the ﬁlter head remain aligned.

NOTE: Handle all elements by bottom end cap only.

Page 10

6. Replace housing o-ring (located at the top of the ﬁlter bowl) if needed. Make certain o-ring is generously lubricated (Use lubricant provided).

7. Reassemble bowl to head.

NOTE: Threaded bowl to head connection, generously

lubricate threads with a high grade/temperature lubricant 150°F (66°C). (Use lubricant provided)

C. Auto Drain Mechanism Replacement

Preﬁlter only: It is recommended that drain mechanism be replaced annually.

5.3 Repair Parts

7 13 20 25 30 35 50

STRAINER (TOP & BOTTOM) 3209715 3209715 3209715 3209716 3209716 3209716 3209716

SHUTTLE VALVE BODY (OUTLET VALVE) 3244971 3244972 3244973 3244974 3244975 3244976 3244977

SHUTTLE (OUTLET VALVE) 3244978 3244979 3244980 3244981 3244982 3244983 3244984

SHUTTLE VALVE BODY (INLET VALVE) 7433646 7433646 7433647 7433647 7433647 7433647 3247592

SHUTTLE (INLET VALVE) 7433648 7433648 7433649 7433649 7433649 7433649 3247593

SWITCH (ON/OFF) 3245021 3245021 3245021 3245021 3245021 3245021 3245021

CONTROLS TIMER 115V 3247594 3247594 3247594 3247594 3247594 3247594 3247594

CONTROLS TIMER 230V 3247595 3247595 3247595 3247595 3247595 3247595 3247595

PURGE/REPRESSURIZATION VALVE 115V 3209763 3209763 3209764 3209764 3209764 3209764 3247596

PURGE/REPRESSURIZATION VALVE 230V 3209765 3209765 3209766 3209766 3209766 3209766 3247597

MAINTENANCE KIT*

Dryers Made After September 19, 2011 DHWJMKTA DHWJMKTB DHWJMKTC DHWJMKTD DHWJMKTD DHWJMKTE DHWJMKTF

Dryers Made Before September 19, 2011 DHWJMKT1 DHWJMKT2 DHWJMKT3 DHWJMKT4 DHWJMKT5 DHWJMKT6 DHWJMKT7

*MAINTENANCE KITS INCLUDES MUFFLER, CONDENSATE DRAIN, PREFILTER ELEMENT, AFTERFILTER ELEMENT, FILTER O-RINGS (2), DESICCANT

MODEL

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WARRANTY

The manufacturer warrants the product manufactured by it, when properly installed, operated, applied, and maintained in accordance with procedures and recommendations outlined in manufacturer’s instruction manuals, to be free from defects in material or workmanship for a period of one (1) year from the date of shipment to the buyer by the manufacturer or manufacturer’s authorized distributor, or eighteen months from the date of shipment from the factory, whichever occurs ﬁrst, provided such defect is discovered and brought to the manufacturer’s attention within the aforesaid warranty period. The manufacturer will repair or replace any product or part determined to be defective by the manufacturer within the warranty period, provided such defect occurred in normal service and not as a result of misuse, abuse, neglect or accident.

The warranty covers parts and labor for the warranty period. Repair or replacement shall be made at the factory or the installation site, at the sole option of the manufacturer. Any service performed on the product by anyone other than the manufacturer must ﬁrst be authorized by the manufacturer. Normal maintenance items requiring routine replacement are not warranted. Unauthorized service voids the warranty and any resulting charge or subsequent claim will not be paid. Products repaired or replaced under warranty shall be warranted for the unexpired portion of the warranty applying to the original product. The foregoing is the exclusive remedy of any buyer of the manufacturer’s product. The maximum damages liability of the manufacturer is the original purchase price of the product or part.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, WHETHER WRITTEN, ORAL, OR STATUTORY, AND IS EXPRESSED IN LIEU OF THE IMPLIED WARRANTY OF MERCHANTABILITY AND THE IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. THE MANUFACTURER SHALL NOT BE LIABLE FOR LOSS OR DAMAGE BY REASON OF STRICT LIABILITY IN TORT OR ITS NEGLIGENCE IN WHATEVER MANNER INCLUDING DESIGN, MANUFACTURE OR INSPECTION OF THE EQUIPMENT OR ITS FAILURE TO DISCOVER, REPORT, REPAIR, OR MODIFY LATENT DEFECTS INHERENT THEREIN. THE MANUFACTURER, HIS REPRESENTATIVE OR DISTRIBUTOR SHALL NOT BE LIABLE FOR LOSS OF USE OF THE PRODUCT OR OTHER INCIDENTAL OR CONSEQUENTIAL COSTS, EXPENSES, OR DAMAGES INCURRED BY THE BUYER, WHETHER ARISING FROM BREACH OF WARRANTY, NEGLIGENCE OR STRICT LIABILITY IN TORT.

The manufacturer does not warrant any product, part, material, component, or accessory manufactured by others

and sold or supplied in connection with the sale of manufacturer’s products.

AUTHORIZATION FROM THE SERVICE DEPARTMENT IS NECESSARY BEFORE MATERIAL IS RETURNED TO THE FACTORY OR

IN-WARRANTY REPAIRS ARE MADE.

SERVICE DEPARTMENT : (724) 746-1100

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DHW SERIES

Pressure Swing Desiccant Compressed Air Dryer

Models 7 through 50 scfm

SPX

1000 Philadelphia Street

Canonsburg, PA 15317-1700 U.S.A.

P: (724) 745-1555

F: (724) 745-6040

E: hankison.americas@spx.com

www.spx.com/hankison

Improvements and research are continuous at SPX.

Specifications may change without notice.

ISSUED 07/2014 Form No.: 3215738 Revision: G