Related Manuals for Puregas MDH Series
Summary of Contents for Puregas MDH Series
- Page 1 MDH Series Air Dryer User’s Guide Models covered: MDH1 MDH2 MDH3 MDH4 MDH5 MDH6 P012547 REV D...
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Page 3: Welcome & Congratulations
1. Welcome & Congratulations Congratulations on your purchase of a new PUREGAS MDH SERIES AIR DRYER! We here at PUREGAS are very proud of our products. We are committed to providing you with the best value and service possible. We are sure that you will be satisfied with your new unit and would like to thank you for choosing PUREGAS for your air dryer requirements. -
Page 4: Table Of Contents
6.6 Installation Checklist ........ 14 13.1 Model Number Coding ......33 13.2 Wiring Diagram ........33 7. Registering Your MDH Series Air Dryer ..15 14. Limited Warranty Agreement ....34 8. Testing Your Air Dryer ......... 16 Registration Reminder ........34 8.1 Safety &... -
Page 5: Safety & Warning Information
MDH Series User’s Guide PUREGAS, LLC 4. Safety & Warning Information This section contains general information about safety and warning points to consider and adhere to during installation and maintenance of your air dryer. PLEASE READ THIS SECTION BEFORE PERFORMING ANY OPERATION OR PROCEDURE ON YOUR AIR DRYER. -
Page 6: Overview & Specifications
5. Overview & Specifications 5.1 Product Description The MDH SERIES AIR DRYER from PUREGAS is a compact, regenerative desiccant air dryer designed to dry compressed air to a standard pressure dew point (PDP) of -40°F. Optional performance of -100°F atmospheric dew point (ADP) can be achieved. -
Page 7: Technical Specifications
MDH Series User’s Guide PUREGAS, LLC 5.4 Technical Specifications Dimensions 7.0” H x 3.5” W x 3.3” D MDH1 10.3” H x 3.5” W x 3.3” D MDH2 8.8” H x 4.0” W x 3.5” D MDH3 10.1” H x 4.0” W x 3.5” D MDH4 9.5”... -
Page 8: Installing Your Air Dryer
MDH Series User’s Guide PUREGAS, LLC 6. Installing Your Air Dryer 6.1 Safety & Warning Information WARNING! Extreme care should be exercised to avoid contact with live electrical circuits. Many procedures performed during installation, and testing of this air dryer require the equipment to be running, creating a situation for potential electrical shock. -
Page 9: Before You Begin
MDH Series User’s Guide PUREGAS, LLC 6.2 Before You Begin 6.2.1 Carefully inspect the unit, including the shipping box as well as the air dryer, for ANY DAMAGE CAUSED BY SHIPPING. If any shipping damage is detected, it is important to file a claim with the shipping company prior to continuing the installation procedures. -
Page 10: Included Contents
MDH Series User’s Guide PUREGAS, LLC 6.3 Included Contents (1) MDH Series Air Dryer (1) User’s Guide (not shown) 6.4 Required Tools and Materials • Power Cord (varies on voltage of unit) • Needle nose pliers • Mounting hardware • Drill •... -
Page 11: Installation Steps
MDH Series User’s Guide PUREGAS, LLC 6.5 Installation Steps IMPORTANT! To properly operate the Air Dryer, PUREGAS recommends that all air filtration elements and options be installed. SEE SECTION 10.3 6.5.1 Remove the air dryer from packaging. 6.5.2 Check for loose parts or wiring. - Page 12 MDH Series User’s Guide PUREGAS, LLC 6.5.5 Install inlet and outlet fittings, filters, and/or assemblies to air dryer. 6.5.6 Pre-drill holes in wall, and install wall mount hardware. (See chart below) Model Width (A) x Height (B) NOTE: Wall mounting MDH1 3 1/8"...
- Page 13 MDH Series User’s Guide PUREGAS, LLC 6.5.8 Connect the air lines to the inlet and outlet ports. CAUTION: Do not exceed SCFM flow capacity of the air dryer. 6.5.9 With a small flathead screw driver, wire power cord to timer. (DC models have...
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Page 14: Installation Checklist
MDH Series User’s Guide PUREGAS, LLC 6.5.11 Check for air leaks: NOTE: This is a general procedure that can be applied to any fitting or hose that has air pressure in it. 6.5.11.1 Listen for any ‘hissing’ sounds which may indicate a fitting or hose air leak. -
Page 15: Registering Your Mdh Series Air Dryer
PUREGAS, LLC 7. Registering Your MDH Series Air Dryer Please take a moment to register your PUREGAS MDH SERIES AIR DRYER. Registering is necessary to activate the Limited Warranty on your product. Once you register, you are eligible to receive free technical support, as well as updates concerning your PUREGAS products. -
Page 16: Testing Your Air Dryer
MDH Series User’s Guide PUREGAS, LLC 8. Testing Your Air Dryer 8.1 Safety & Warning Information WARNING! Extreme care should be exercised to avoid contact with live electrical circuits. Many procedures performed during installation, testing, and maintenance of this air dryer requires the equipment to be running, creating a situation for potential electrical shock. -
Page 17: Testing Consistent Dryer Cycling
MDH Series User’s Guide PUREGAS, LLC 8.2 Testing Consistent Dryer Cycling Note: For MCA1-4 proceed to the next step, for MDH5-6 skip to step 8.2.4. 8.2.1 MDH 1-4: Push the tube in and hold the ferrule. While holding the ferrule, pull the tube out. -
Page 18: Measuring Incoming Voltage
MDH Series User’s Guide PUREGAS, LLC 8.2.5 Place your hand beneath the 4 way valve and feel for purging air. • Tower 1 will purge for 60 seconds • Tower 2 will purge for 60 seconds • Tower 1 will purge for 60 seconds •... -
Page 19: Measuring 4 Way Solenoid Voltage
MDH Series User’s Guide PUREGAS, LLC 8.3.2 Use a Voltmeter to measure the voltage across the incoming terminals. The voltage should measure ± 10%: • 115VAC • 230 VAC • 12 VDC • 24 VDC • 48 VDC If the incoming voltage measures less than indicated above, it is recommended that steps be taken at your facility to increase the incoming power to the recommended levels. -
Page 20: Visually Verify Cycle Timer
MDH Series User’s Guide PUREGAS, LLC 8.4.2 Use a Voltmeter to measure the voltage across the set of “Valve” terminals. The voltage should measure ± 10%: • 115 VAC • 230 VAC • 12 VDC • 24 VDC • 48 VDC Continue to measure for up to 90 seconds if no voltage is initially measured. -
Page 21: Test For Purge Muffler Restriction
MDH Series User’s Guide PUREGAS, LLC 8.6 Test for Purge Muffler Restriction 8.6.1 Using a small flathead screwdriver, remove purge mufflers. NOTE: The MDH1- 4 will only have one purge muffler. 8.6.2 Verify if the operation of the unit has improved after 4 minutes of cycling. -
Page 22: Testing Air Fittings & Hoses For Leaks
MDH Series User’s Guide PUREGAS, LLC 8.7 Testing Air Fittings & Hoses for Leaks NOTE: This is a general procedure that can be applied to any fitting or hose that has air pressure in it. 8.7.1 Listen for any ‘hissing’ sounds which may indicate a fitting or hose air leak. -
Page 23: Maintaining Your Dryer
9. Maintaining Your Dryer In order to ensure that your MDH Air Dryer continues to operate efficiently and reliably, PUREGAS recommends performing the following maintenance procedures at the specified Six Month intervals. It is also recommended that you print out the included Maintenance log sheet (section 16) and record all completed maintenance for historical tracking and reference purposes. -
Page 24: Maintenance Log Sheet
MDH Series User’s Guide PUREGAS, LLC CAUTION! Observe precautions for handling Electrostatic Sensitive Devices. IMPORTANT! After performing any maintenance, always soap test pressure fittings to check for air leaks. Also, check for any loose or disconnected wiring. 9.2 Maintenance Log Sheet... -
Page 25: Replacement Parts & Accessories
MDH Series User’s Guide PUREGAS, LLC 10. Replacement Parts & Accessories 10.1 Parts Recommended Description Part Number Quantity Spare Desiccant Tower MDH1 51371 MDH2 51372 MDH3 51373 MDH4 51374 MDH5 51375 MDH6 51376 Shuttle Valve (1) MCA1-4 61015 MCA5-6 61016 Purge Muffler ... -
Page 26: Parts Continued
MDH Series User’s Guide PUREGAS, LLC 10.2 Parts Continued Part Number Rec’d Description Spare 12 VDC 24 VDC 48 VDC Solid State (1) Timer 51800 50022 50021 50021 P013155 4 Way Valve 10043- 10043- 10043- (1) MDH1-4 10043... -
Page 27: Accessories For Your Air Dryer
MDH Series User’s Guide PUREGAS, LLC 10.3 Accessories for Your Air Dryer Description Part Number Filter Kit Keeps all impurities from contaminating 51820 the desiccant towers. Includes 5 micron pre-filter, 0.01 coalescing pre-filter, and 1.0 micron after-filter. Filter Kit w Regulator... -
Page 28: Ordering Parts From Puregas
User’s Guide and will not be covered. Please refer to the information included with the specific replacement part for this instruction. Once you have identified your required parts and accessories, contact the PUREGAS Inside Sales/Service department to order: (303) 427-3700 option 2 Fax –... -
Page 29: Initiating A Service Transaction
PLEASE READ THIS SECTION FIRST. It is important that you use the following sections in order to diagnose and attempt to fix the problem with your air dryer before placing a call to PUREGAS Technical Support. This troubleshooting guide is intended to simplify the isolation of problems, present possible causes, provide test procedures for verification, and suggest corrective actions to restore the air dryer back to normal operation. -
Page 30: Safety & Warning Information
IMPORTANT! Performing procedures not described in this User’s Guide or installing components not supplied by PUREGAS is NOT RECOMMENDED AND MAY VOID THE WARRANTY. 12.3 Low Pressure or Flow Possible Cause... -
Page 31: Excessive Purge
MDH Series User’s Guide PUREGAS, LLC 12.4 Excessive Purge Possible Cause Check Corrective Action Defective timer Verify timing cycle Replace timer (section (section 8.5 ) 10.2) Defective 4 way Test for consistent dryer Replace 4 way solenoid solenoid valve cycle, and verify voltage valve (section 10.2) -
Page 32: Contacting Puregas Technical Support
PUREGAS, LLC 12.6 Contacting PUREGAS Technical Support Please read the Before You Call PUREGAS section (12.1) Once you have exhausted all of the potential problems and solutions covered in the Troubleshooting Your Dryer section, and you still require further assistance to correct... -
Page 33: Appendix
MDH Series User’s Guide PUREGAS, LLC 13. Appendix 13.1 Model Number Coding 13.2 Wiring Diagram Page 33 of 36 P012547 REV D... -
Page 34: Limited Warranty Agreement
This warranty shall not apply to any PUREGAS product which shall have been repaired or altered in any way by anyone other than PUREGAS or authorized personnel so as to affect, in our judgment, its proper functioning or reliability, neither will it apply to any product which has been subject to misuse, negligence, or accident. -
Page 35: Contacting Puregas
MDH Series User’s Guide PUREGAS, LLC 15. Contacting PUREGAS 15.1 General PUREGAS, LLC 226A Commerce Street Broomfield, Colorado 80020 (800) 521-5351 (303) 427-3700 Fax – (303) 657-2205 sales@puregas.com www.airdryers.com 15.2 Sales (800) 521-5351 Fax – (303) 657-2205 sales@puregas.com 15.3 Service (800) 521-5351 (option 3) Fax –... -
Page 36: Maintenance Log Sheet
MDH Series User’s Guide PUREGAS, LLC 16. Maintenance Log Sheet MODEL: LOCATION NAME: SERIAL NUMBER: ADDRESS: DATE INSTALLED: Maintenance Interval (Months) Procedure Section Visually Inspect MDH for Loose Wiring or 6.5.2 Hardware ...
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