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IMPORTANT: READ THIS MANUAL
CAREFULLY. IT CONTAINS INFORMATION
ABOUT SAFETY AND THE SAFETY OF OTHERS.
ALSO BECOME FAMILAR WITH THE PROPER
INSTALLATION AND CONTROLS OF THE AIR
DRYER BEFORE OPERATING. ONLY QUALIFIED,
TRAINED AND LISCENSED PERSONAL SHOULD
SERVICE OR OPERATE THIS EQUIPMENT.
CAUTION:THIS MACHINE CONTAINS HIGH
PRESSURE GAS AND ELECTRICITY.
Owners Manual
Refrigerated Air Dryer
MHT SERIES
TABLE OF CONTENTS
INTRODUCTION, RECEIVING, DATA LABEL
HOW THE AIR DRYER WORKS
INSTALLATION
DRYER CONTROLS, START UP, INITIAL RUN
PROCEDURE
WEEKLY MAINTENANCE, SETTING DRAIN
TIMER, TECHNICAL DATA
ADJUSTING SUCTION PRESSURE/EVAP
TEMP, ELECT SCHEMATICS
NOTE:
If you need service on your dryer please have
the following information:
1. Model #__________________________
2. Serial #___________________________
3. Voltage___________________________
4. Name of distributor that dryer was pur-
chased from:
_________________________________
_________________________________
5. Description of the problem:
2
3
4
5
6
7
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Summary of Contents for Puregas MHT Series
- Page 1 Owners Manual Refrigerated Air Dryer MHT SERIES TABLE OF CONTENTS INTRODUCTION, RECEIVING, DATA LABEL HOW THE AIR DRYER WORKS INSTALLATION DRYER CONTROLS, START UP, INITIAL RUN PROCEDURE WEEKLY MAINTENANCE, SETTING DRAIN TIMER, TECHNICAL DATA ADJUSTING SUCTION PRESSURE/EVAP TEMP, ELECT SCHEMATICS...
- Page 2 R134a and is available at local refrigeration wholesalers. Direct any question not covered in this manual to your distributor or call PUREGAS at 1-800-521-5351. Befor e calling with any questions always have the air dryer model #, serial # and pressure gauge readings.
- Page 3 HOW THE AIR DRYER WORKS MHT Series refrigerated compressed air dryers use refrigeration cooling to condense entrained moisture out of the compressed air stream. Warm saturated air enters the air-to-air heat exchanger at the dryer inlet. In the air-to-air heat exchanger the inlet air is pre- cooled by the outgoing cold air.
- Page 4 INSTALLATION AND LOCATION CONTINUED VENTILATION– Install dryer only in a well-ventilated, clean, dry area and keep at least 3 feet between the dryer, other equipment and the walls. DRYER LOCATION– Make sure there is approximately 3 feet around the dryer for service and maintenance purposes. Do not install the dryer outside.
- Page 5 ELECTRICAL INSTALLATION– The dryer data label lists the electrical power requirements for the air dryer. The user must confirm that the line voltage matches the voltage listed on the data label. (Warning– Operating the air dryer with improper line voltage will void the warranty.) Pr ovide the pr oper size wir e, disconnect switches and fuses in accor dance with applicable codes.
- Page 6 WEELKY MAINTENANCE • Clean air cooled condenser coils– Blow off all dust and dirt that is on the condenser fins with a compressed air maintenance gun. • While cleaning condenser fins take caution to no damage the fins. WARNING: DRYER FAILURE DUE TO A DIRTY CONDENSER IS NOT COVORED UNDER WARRANTY HOW TO SET THE CONDENSATE DRAIN OPEN &...
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Page 7: Electrical Schematics
HOW TO MAKE MINOR REFRIGERANT SUCTION PRESSURE (EVAP TEMP) ADJUSTMENTS Keep dryer running under a no load by turning off or bypassing the compressed air. Remove dryer top and locate the Hot Gas Bypass Valve. Remove cap on Hot Gas Bypass Valve and using an Allen wrench turn valve counter clockwise to decrease the suction pressure and clockwise to increase the suction pressure. - Page 8 PUREGAS, LLC 226A Commerce St. Broomfield, CO 80020 1-800-521-5351 www.airdryers.com...
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