Trane Series R™ Helical Rotary Chiller RTAC170X

Warning: Ensure you are wearing appropriate PPE

Secure the isolators to the mounting surface using the mounting slots in the isolator base plate

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

Enter the isolator deflection (should be 1/4 inch or 6 mm)

Fully tighten the isolator mounting bolts

Sign off on the isolator replacement

Manually open EXV for 15 minutes to allow refrigerant to drain to evaporator by gravity (ensure water is flowing in the evaporator prior to opening the EXV)

Let unit sit with heaters on to drive refrigerant out of oil and warm up compressor bearings. Depending upon ambient conditions, this may take up to 24 hours.Ensure the UCM is powered so the pump may be energized if it detects a freeze condition

Once the oil level has returned to normal, the unit can be put back into operation

Suction line isolation valve is closed

Oil return line service valve is closed

Liquid line service valve is closed

Select the pump used to move refrigerant

NOTE: If a pump is to be used, connect it before closing this valve. This port is only isolated when the valve is back seated. If a vacuum pump is used, then connect it to the discharge line service valve near the oil separator.

Evaporator is large enough to hold all the charge for any unit to below the center-line of the shell

Sign off on the Low Side Charge Isolation

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