Trane Series R™ Helical Rotary Chiller RTAC375S

Attach vacuum hoses to evaporator service valves (one per circuit). Open service valves.

Attach charging hoses to the charging port on the liquid line filter (one per circuit). The filters contain a port with a ¼” (6mm) flare.

Begin semi-automatic vacuum procedure.

Manually isolate the unit from vacuum.

Charge unit through the filter housing port per Table 1 - Table 4.

When charging is complete, shut evaporator service valve and disconnect vacuum and charging hoses.

Sign off on the refrigerant charging procedure

Warning: This procedure should be followed when adding charge to an undercharged unit.

Attach charging hose to evaporator service valve (3/8” (9mm) flare). Open service valve.

Add 10 pounds of refrigerant (R-134a) charge.

Close valve, remove charging hose and start unit. Monitor subcooling.

If subcooling is still insufficient, return to step #1.

NOTE: Proper subcooling can be determined from run log history, service experience, or by contacting Trane technical service.

Proper oil and refrigerant charge is essential for proper unit operation, unit perfor-mance, and environmental protection. Only trained and licensed service personnal should service the chiller.

Some symptoms of a refrigerant under-charged unit:

• Higher than normal discharge superheat

• Larger than normal evaporator approach temperatures (leaving water temperature - saturated evaporator temperature)

• Low evaporator refrigerant temperature limit

• Low refrigerant temperature cutout diagnostic

Inspect the individual pieces of the shipment for obvious damage

Inspect the unit for concealed damage

If concealed damage is discovered, stop unpacking the shipment.

Provide evidence that the damage did not occur after delivery

Notify the carrier’s terminal of the damage immediately, by phone and by mail

Notify the Trane sales representative and arrange for repair

Do not repair the unit until damage is inspected by the carrier’s representative.

Sign off on the inspection checklist

1. Perform all weekly and monthly procedures.

2. Check oil sump oil level while unit is off.

NOTE: Routine changing of the oil is not required. Use an oil analysis to determine the condition of the oil.

3. Have a qualified laboratory perform a compressor oil analysis to determine sys-tem moisture content and acid level. This analysis is a valuable diagnostic tool.

4. Contact a qualified service organization to leak test the chiller, to check operating and safety controls, and to inspect electrical components for deficiencies.

5. Inspect all piping components for leakage and damage. Clean out any inline strainers.

6. Clean and repaint any areas that show signs of corrosion.