Ingersoll Rand Refrigarated Air Dryer TS8A

Warning: This procedure should only be performed by a qualified refrigeration technician.

Dryer loaded with a minimum of 80% of full compressed air rated load?

Dryer parameters stabilized (30 minutes with no changes in conditions)?

Refrigerant gauge reading from low side Schrader connection

Wall temperature reading from thermocouple or similar device

Dryer stabilized (30 minutes with no changes in conditions) after adjustment?

Checked setting on each evaporator and thermal expansion valve before making adjustments?

NOTICE! Do not adjust the low pressure below 5.03 barg (73 psig) or above 5.66 barg (82 psig).

CAUTION! Before beginning any work on the dryer, read and understand the safety instructions earlier on in this manual. Open, lock and tag the main electrical disconnect and isolate the dryer from the air system. Do not under any circumstances open any drain valve or remove components from the dryer until this has been carried out. Ensure that all pressure has been vented from the dryer.

CAUTION! When using any form of liquid for cleaning, ensure that all electrical components are protected or covered to prevent ingress of liquid.

WARNING! The dryer’s refrigeration system operates in a pressurised shutdown mode. If the compressor stops, the system will contain high pressure refrigerant. The refrigeration system must only be opened by a qualified technician certified in handling refrigerants.

WARNING! Use suitable equipment for lifting heavy items and ensure loose components are adequately supported to eliminate risk of dropping.

Check / clean Drain Valve Strainer.

Check High Refrigerant Temperature Switch.

All air pressure is fully discharged and isolated from the system?

Machine cannot be started accidentally or otherwise?

All residual electrical power sources are isolated?

Anyone entering the machine is aware of the reduced level of protection and the additional hazards?

Refrigeration is recovered by a qualified technician?

Appropriate fire control and oil spill equipment is available?

Work carried out is limited to only those tasks which require the machine to run?

All air pressure is fully discharged and isolated from the system?

Machine cannot be started accidentally or otherwise, by posting warning signs and/or fitting appropriate anti–start devices?

All residual electrical power sources (mains and battery) are isolated?

Anyone entering the machine is aware of the reduced level of protection and the additional hazards, including hot surfaces and intermittently moving parts?

The refrigeration is recovered by a qualified technician with the appropriate certifications to handle refrigerants?

The appropriate fire control and oil spill equipment is available?

The work carried out is limited to only those tasks which require the machine to run?

Appropriate personal protective equipment is worn?

Warning: This procedure should be performed by trained personnel only.

Enter the local ambient temperature

Install a refrigerant gauge to a low side Schrader connection.

Is the 2RPS condenser fan switch about to close and start the fan(s)?

Adjust the hot gas valve. Increase pressure by turning the screw clockwise. Decrease pressure by turning counter–clockwise.

Refer to the chart for refrigerant pressure–temperature relationship.

Enter the compressed air dewpoint

The dryer should be operating at its nominal rated conditions and 3.3C to 5C (6F to 9F) evaporated superheat setting.