Trane Series R™ Helical Rotary Chiller RTAC170S

Perform all weekly maintenance procedures

While unit is running in stable conditions.

Check MP pressure for evaporator, condenser and intermediate oil.

Observe liquid line sight glass on EXV.

If liquid line sight glass has bubbles measure the subcooling entering the EXV. The subcooling should never be less than 4 °F under any circumstances.

A clear sightglass alone does not mean that the system is properly charged. Also check the rest of the system operating conditions.

Inspect the entire system for unusual conditions and inspect the condenser coils for dirt and debris. If the coils are dirty, refer to coil cleaning.

Sign off on the weekly maintenance

Warning: Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized.

Perform all weekly and monthly procedures

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.

Have a qualified laboratory perform a compressor oil analysis to determine system moisture content and acid level

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

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

Clean and repaint any areas that show signs of corrosion

This procedure should be followed when adding charge to an undercharged unit. When low charge is indicated by low subcooling in the liquid line, charge should be added until sufficient subcooling is achieved.

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

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

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

4. 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.;

Ensure enough space around the outdoor unit for unrestricted access to all service points.

Refer to submittal drawings for the unit dimensions.

Enter the clearance in feet for compressor service (minimum recommended is 4 feet)

Provide sufficient clearance for the opening of control panel doors.

Refer to Figure 18 through Figure 19 for minimum clearances.

Local codes requiring additional clearances will take precedence over these recommendations.

Ensure unobstructed flow of condenser air to maintain chiller capacity and operating efficiency.

Avoid warm air recirculation and coil starvation.

Do not allow debris, trash, supplies etc. to accumulate in the vicinity of the unit.