Trane Series R™ Helical Rotary Chiller RTAC350X

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

Liquid line service valve is shut

Oil return line service valve is shut

Circuit started with the service tool (access compressor service view in Techview)

Discharge check valve closed after unit trips

Discharge isolation valve is closed

Oil line shut off valve is closed

Refrigerant remainder recovered

NOTE: Remaining vapor can be recovered/stored in the high side of the system. Be certain to follow proper recovery procedures to avoid introduction of non-condensable gases.

Secure the isolators to the mounting surface using the mounting slots in the isolator base plate. Do not fully tighten the isolator mounting bolts at this time.

Align the mounting holes in the base of the unit with the threaded positioning pins on the top of the isolators.

Lower the unit onto the isolators and secure the isolator to the unit with a nut. Maximum isolator deflection should be 1/4 inch (6 mm).

Level the unit carefully. Fully tighten the isolator mounting bolts.

Sign off on the Neoprene Isolator Replacement

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 for compressor service in feet

Ensure 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.

CAUTION: Evaporator Damage! Water must be flowing through the evaporator during the entire charging process to avoid freezing and rupturing of the evaporator tubes. Charge first with vapor to avoid freezing tubes.

Weight of the amount of charge removed

Does the weight of the charge removed match with the values in Table 1 - Table 4?

If there is a difference in charge, it may indicate a leak.

Attach charging hose to evaporator service valve (3/8” (9mm) flare). Is the service valve open?

Add charge to evaporator to bring total circuit charge up to the level indicated in the above chart.

Is the service valve closed and charging hose disconnected?

Sign off on the refrigerant charging process