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I N S T R U CT I O N M A N UA L
DHW Series
Pressure Swing Desiccant Compressed Air Dryer
Models 7 through 50 scfm
F O R M N O . : 3 2 1 5 7 3 8
R E V I S I O N : 0 7 / 2 0 1 4
R E A D A N D U N D E R S TA N D T H I S M A N UA L P R I O R TO O P E R AT I N G O R S E R V I C I N G T H I S P R O D U CT.
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Summary of Contents for SPX Hankison DHW 13
- Page 1 I N S T R U CT I O N M A N UA L DHW Series Pressure Swing Desiccant Compressed Air Dryer Models 7 through 50 scfm F O R M N O . : 3 2 1 5 7 3 8 R E V I S I O N : 0 7 / 2 0 1 4 R E A D A N D U N D E R S TA N D T H I S M A N UA L P R I O R TO O P E R AT I N G O R S E R V I C I N G T H I S P R O D U CT.
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Page 2: Table Of Contents
IMPORTANT Contents READ PRIOR TO STARTING THIS EQUIPMENT 1.0 GENERAL INFORMATION ..........2 2.0 DESCRIPTION ..............3 UNPACKING 3.0 INSTALLATION ..............4 4.0 OPERATION ..............7 This shipment has been thoroughly checked, packed and 5.0 MAINTENANCE .............. 9 inspected before leaving our plant. It was received in good WARRANTY ................ -
Page 3: Description
2.0 Description Air By-Pass Assembly An optional air by-pass assembly is available for all models. Function When ordered with the dryer, the by-pass assembly is factory installed inside the dryer cabinet. Make sure the by-pass Dual tower regenerative desiccant dryers are utilized to dry assembly is in the desired mode: "Dry"... -
Page 4: Installation
3.0 Installation Dimensions, Connections, Weight DIMENSIONS in (mm) CONNECTIONS MODEL WEIGHT NUMBER lb (kg) INLET OUTLET 31.09 (790) 17.52 (445) 1.15 (29) 15.23 (387) 6.69 (170) 3.74 (95) 30.5 (775) 3.74 (95) 5.31 (135) 27.5 (699) 1/2" NPT (F) 1/2" NPT (F) 55 (25) 31.09 (790) 17.52 (445) - Page 5 Electrical Specifications MODEL WATTS 27.5 27.5 27.5 31.8 31.8 33.0 17.0 LEGEND SOL 1 Left Purge Valve All Models SOL 2 Right Purge Valve All Models On/Off Switch ELECTRICAL CONNECTION SOL.1 OUT SOL.1 GROUND SOL.2 OUT SOL.2 MAIN POWER Figure 4 Electrical Hook-up Dryer Location in a Compressed Air System NOTE: Installation of a refrigerated dryer ahead of a pres- sure-swing desiccant dryer does not increase desiccant...
- Page 6 D. Afterfilters - To ensure downstream air purity (prevent CUSTOMER ASSEMBLY desiccant dust from traveling downstream) adequate filtration down-stream of the dryer is required. De- INSTRUCTIONS pending on the degree of purity you require from your compressed air system, the following filters are recom- These instructions MUST be followed prior to mounting of mended: dryer enclosure.
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Page 7: Operation
4.0 Operation 2. Maximum inlet flow at various pressures To determine maximum inlet flow at inlet pressures other than 100 psig (7kgf/cm ), multiply inlet flow Start-up from Table 1 by multiplier from Table 2 that corre- sponds to system pressure at inlet of dryer. A. - Page 8 2. Average Purge Flow Step 4: Find Minimum Outlet Flow available by subtracting The Average Purge Flow (APF) is the actual amount of Maximum Purge Flow (Step 2) from inlet flow of flow averaged over the entire purge/repressurization 14 scfm: 14 - 4.3 = 9.7 scfm. cycle.
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Page 9: Maintenance
5.0 Maintenance 5.2 Prefilter/Afterfilter Maintenance A. Element Replacement CAUTION: The heatless desiccant dryer is a pressure contain- 1. For maximum filtration efficiency, replace element an- ing device. Depressurize before servicing. (See section 4.6.) nually or when pressure drop reaches 4.3 psi (0.3 bar) (indicator in red area), whichever occurs first. - 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 lubri- cant 150°F (66°C).
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Page 11: Warranty
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 de- fect is discovered and brought to the manufacturer’s attention within the aforesaid warranty period. - Page 12 Models 7 through 50 scfm 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 COPYRIGHT ©2014 SPX Corporation...
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