Trane Series R™ Helical Rotary Chiller RTAC185S

Follow the manufacturer’s recommendations for selection and installation procedures.

Is the switch mounted upright with a minimum of 5 pipe diameters of straight horizontal run on each side?

Is the switch not installed close to elbows, orifices or valves?

NOTE: The arrow on the switch must point in the direction of flow.

Is all air removed from the water system to prevent switch fluttering?

NOTE: The CH530 provides a 6-second time delay after a “loss-of-flow” diagnostic before shutting the unit down. Contact a qualified service representative if nuisance machine shutdowns persist.

Is the switch adjusted to open when water flow falls below the minimum flow rate?

Evaporator data is given in the General Information section. Flow switch contacts are closed on proof of water flow.

Is a pipe strainer installed in the entering evaporator water line to protect components from waterborne debris?

Warning: This procedure requires trained personnel with PPE!

Is the temperature downstream of the filter 8°F (4.4°C) lower than the upstream temperature?

Is the unit properly subcooled?

Is the EXV closed with the unit off?

Is the liquid line isolation valve closed?

Attach a photo of the hose attached to the service port on the liquid line filter flange.

Is the refrigerant evacuated from the liquid line and stored?

Is the pressure in the liquid line equalized with atmospheric pressure?

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

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

Enter the distance in feet around the outdoor unit

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 vicinity of the unit free from debris, trash, supplies etc.?

Ensure condenser coils and fan discharge are kept free of snow or other obstructions.

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). Open service valve.

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

Close service valve and disconnect charging hose.

Sign off on the refrigerant charging process