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Ultra Air Refrigerated Dryers
201 Series Instruction Manual
WARNING
Dryer failure resulting from a dirty condenser is not covered under warranty.
Air Cooled Condenser Maintenance Procedures
Air cooled condensers may be cleaned by blowing clean with a compressed air blow gun or by low pres-
sure steam cleaning. Steam cleaning may be necessary for heavy deposits. Do not use wire brushes as
this may bend the fins, causing leaks. Straighten any bent fins and fan blades.
Recommended service interval is 1000 hours of operation. More frequent service may be required if dryer
is located in a dusty or dirty area.
Ambient air filters are required for dryers located in an excessively dusty or dirty environment.
Water Cooled Condenser Maintenance Procedures
The tube and tube condensers used on the 201 Series water cooled dryers are designed for easy clean-
ing. Calgon Corporation, a division of Merck & Company, manufactures a scale disolver which can be
pumped through the water tubes. It may be necessary to use a combination of acid and scale disolver.
For optimal performance, it is important that the water cooled condenser be cleaned regularly, ideally
every 2000 hours of operation.
Auto Drain Information
All UA 201 Series dryers (125-2000 models) are equipped with two electronic auto drain valves. One is
connected to the prefilter, the other is connected to the separator. The open and close time on the drains
can be adjusted using the drain open and closed buttons on the control panel. For the UA Series models
10-100, the prefilter is equipped with an automatic and the separator with an electronic drain.
Maintaining the auto drain
1. Turn dryer on/off switch to ‘off’ position
2. Disconnect power supply to the dryer
3. Lockout and tag power supply in accordance with OSHA regulations
4. If applicable, switch dryer to bypass mode
5. Remove filter strainer and clean
6. Disassemble the solenoid valve, and clean or replace all parts neccessary
7. Check electrical continuity across coil
8. Reassemble valve and test, using the test button on the electronic control panel
9. Repressurize system and test drain by using the test button on the control panel
REFRIGERATED AIR DRYER INSTRUCTION MANUAL
