Ingersoll Rand Refrigarated Air Dryer TS7A

Is all air pressure fully discharged and isolated from the system?

Is the machine secured against accidental start?

Are all residual electrical power sources isolated?

Is anyone entering the machine aware of the reduced level of protection and the additional hazards?

Is the refrigeration recovered by a qualified technician?

Is the appropriate fire control and oil spill equipment available?

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

Prior to attempting any maintenance work, ensure that all air pressure is fully discharged and isolated from the system, the machine cannot be started accidentally or otherwise, by posting warning signs and/or fitting appropriate anti–start devices, and all residual electrical power sources (mains and battery) are isolated.

Prior to opening or removing panels or covers to work inside a machine, ensure that anyone entering the machine is aware of the reduced level of protection and the additional hazards, including hot surfaces and intermittently moving parts.

Prior to opening the refrigeration circuit, ensure that the refrigeration is recovered by a qualified technician with the appropriate certifications to handle refrigerants, and the appropriate fire control and oil spill equipment is available.

Prior to attempting any maintenance work on a running machine, ensure that the work carried out is limited to only those tasks which require the machine to run, all hazards present are known, appropriate personal protective equipment is worn, loose clothing, jewelry, long hair etc. is made safe, and warning signs indicating that Maintenance Work is in Progress are posted in a position that can be clearly seen.

Upon completion of maintenance tasks and prior to returning the machine into service, ensure that the machine is suitably tested, all guards and safety protection devices are refitted, all panels are replaced, canopy and doors closed, and hazardous materials are effectively contained and disposed of.

Oil visible in the sight glass while the machine is running on load?

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.

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).

Ensure all air pressure is fully discharged and isolated from the system.

Ensure the machine cannot be started accidentally or otherwise, by posting warning signs and/or fitting appropriate anti–start devices.

Ensure all residual electrical power sources (mains and battery) are isolated.

Ensure anyone entering the machine is aware of the reduced level of protection and the additional hazards, including hot surfaces and intermittently moving parts.

Ensure the refrigeration is recovered by a qualified technician with the appropriate certifications to handle refrigerants.

Ensure the appropriate fire control and oil spill equipment is available.

Ensure the work carried out is limited to only those tasks which require the machine to run.

Ensure appropriate personal protective equipment is worn.