Trane Series R™ Helical Rotary Chiller RTAC140X

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

Enter the unit dimensions as per submittal drawings

Enter the minimum clearance for compressor service (Recommended: 4 feet or 1.2 m)

Is there sufficient clearance for the opening of control panel doors?

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

Is there sufficient flow of air across the condenser heat transfer surface?

Is there any warm air recirculation or coil starvation?

Ensure no debris, trash, supplies etc. accumulate in the vicinity of the unit.

Is the condenser coil free of debris?

Warning: Ensure you are wearing appropriate PPE before starting the procedure

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 isolator replacement

Suction line isolation valve is closed

Oil return line service valve is closed

Liquid line service valve is closed

Method used to move refrigerant from the condenser to evaporator

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. A vacuum pump will be required for part of the procedure.

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

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.

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

Amount of charge added to the evaporator

Is the total circuit charge up to the level indicated in the chart?

Is the service valve closed and charging hose disconnected?

Sign off on the refrigerant charging process

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