Pioneer Air Systems ADR Series, Owner'S Manual

Micro-Monitor:

 The Pioneer Micro-Monitor is standard in models R75/ADR40 and larger 

(optional in smaller sizes). The dryer operation and performance are shown at a glance by selecting the 
desired reading.  

 
Maintenance 

To maximize system performance and reliability, the following maintenance procedure is required: 

Air and water cooled condensers must be inspected and cleaned periodically. Inspect and replace 
prefilter and after-filter elements periodically (recommended monthly).

 To avoid downtime, always 

keep spare elements in stock. 
 
 

Automatic Drain Maintenance: 

The float type automatic drain is standard in models R10 and 

R15. Clean drain periodically to ensure proper functioning. Remove air pressure before loosening the 
separator bowl. In models R20 and larger, the three step automatic drain is standard. It includes an 
isolation valve, a cleanable strainer, and a timer operated solenoid valve. Close the isolation valve before 
removing and cleaning the strainer. Models R800/ADR400 and larger have an additional manual drain 
on the air-air heat exchanger. 

10-year Limited Warranty 

A 10-year prorated heat exchanger warranty (through R5000/ADR2500) and a 10-year prorated 

compressor warranty apply on standard Pioneer products. Pioneer standard dryers are warranted to be 
free from defects in material and workmanship for a period of one year from the date of shipment (15 
months for distributor stock units), provided the equipment is used according to the company’s 
recommended usage. Liability is limited to the repair, refund, or replacement in kind at the company’s 
sole option. In no event will Pioneer be liable or responsible for incidental and consequential damages, 
even if the possibility of such has been made known to the company. The usual maintenance and 
replacement-type products are not covered by this warranty. To protect this warranty, use genuine 
Pioneer accessories and spare parts. One year mechanical parts only warranty applies to equipment 
outside the U.S.A., Mexico, and Canada. Extended warranties are available. Contact your distributor for 
details. 
 

Please notify your distributor or the factory before working on equipment. Unauthorized work may 

not be covered and may void the warranty. Please contact the factory to obtain a return merchandise 
authorization number (RMA#) before returning equipment. 
 

Caution:

 A refrigerant compressor operating under sustained overload conditions caused by excessive 

airflow, high inlet air temperature, and/or ambient temperature will continue to work at a higher 

8