PUREGAS, LLC MDH Series User’s Guide
Page 4 of 36 P012547 REV D
3. Table of Contents
1. Welcome & Congratulations .......................... 3
2. Introduction ..................................................... 3
3. Table of Contents............................................. 4
4. Safety & Warning Information...................... 5
5. Overview & Specifications.............................. 6
5.1 Product Description.................................... 6
5.2 Key Features............................................... 6
5.3 MDH Series Air Dryer Models................... 6
5.4 Technical Specifications............................. 7
6. Installing Your Air Dryer............................... 8
6.1 Safety & Warning Information................... 8
6.2 Before You Begin....................................... 9
6.3 Included Contents..................................... 10
6.4 Required Tools and Materials................... 10
6.5 Installation Steps....................................... 11
6.6 Installation Checklist................................ 14
7. Registering Your MDH Series Air Dryer.... 15
8. Testing Your Air Dryer................................. 16
8.1 Safety & Warning Information................. 16
8.2 Testing Consistent Dryer Cycling............. 17
8.3 Measuring Incoming Voltage ................... 18
8.4 Measuring 4 Way Solenoid Voltage......... 19
8.5 Visually Verify Cycle Timer .................... 20
8.6 Test for Purge Muffler Restriction............ 21
8.7 Testing Air Fittings & Hoses for Leaks.... 22
9. Maintaining Your Dryer............................... 23
9.1 Safety & Warning Information................. 23
9.2 Maintenance Log Sheet ............................ 24
10. Replacement Parts & Accessories .............. 25
10.1 Parts........................................................ 25
10.2 Parts Continued....................................... 26
10.3 Accessories for Your Air Dryer.............. 27
10.4 Ordering Parts from PUREGAS............. 28
11. Service & Repair.......................................... 28
11.1 Services Offered at Puregas’ Facility...... 28
11.2 Initiating a Service Transaction .............. 29
12. Troubleshooting Your Air Dryer ............... 29
12.1 Before You Call PUREGAS................... 29
12.2 Safety & Warning Information ............... 30
12.3 Restricted Pressure or Flow .................... 30
12.4 Excessive Purge...................................... 31
12.5 Delivers Wet Air..................................... 31
12.6 Contacting PUREGAS Technical
Support............................................................ 32
13. Appendix ...................................................... 33
13.1 Model Number Coding........................... 33
13.2 Wiring Diagram...................................... 33
14. Limited Warranty Agreement.................... 34
Registration Reminder.................................... 34
15. Contacting PUREGAS ................................ 35
15.1 General.................................................... 35
15.2 Sales........................................................ 35
15.3 Service .................................................... 35
15.4 Technical Support................................... 35
16. Maintenance Log Sheet............................... 36
17. Notes.............................................................. 36
