Trane Series R™ Helical Rotary Chiller RTAC400H

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

Enter the unit dimensions as per the submittal drawings

Enter the minimum clearance for compressor service in feet

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 occurrence of 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?

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?

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 trip

Discharge isolation valve is closed

Oil line shut off valve is closed

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.

Attach vacuum hoses to evaporator service valves (one per circuit)

Attach charging hoses to the charging port on the liquid line filter (one per circuit)

Filters contain a port with a ¼” (6mm) flare

Begin semi-automatic vacuum procedure

Manually isolate the unit from vacuum

Charge unit through the filter housing port per Table 1 - Table 4

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.;