Carrier 00EFN900003000A installation instructions Installation

INSTALLATION

Shut off all power to this equipment prior to installation. There may be more than one disconnect switch. Tag all disconnect locations to alert others not to restore power until work is completed. Failure to disconnect power from equipment prior to installation could result in serious personal injury or death.

1.Inspect package contents for missing or damaged parts. File a claim with the shipping agency if parts are damaged and notify your local Carrier representative if any item is missing.

2.Determine the new location for the cooler. Ensure that the new location supports the cooler and economizers weights and that there is enough room for service access and tube removal. See Tables 4A and 4B to determine refrigeration line sizes. See Table 5 for cooler and economizers weights. See Fig. 4A-5B for cooler and economizers dimensions, tube removal clearances, and service areas.

3.Open and tag all electrical disconnects.

Cooler and Economizer Removal — The cooler and economizers are accessible from the cooler side of the unit. To remove the cooler and economizers from the unit, complete the following steps:

1.Remove refrigerant from all circuits using standard refrigeration practices. Refer to unit nameplate or installa- tion instructions for refrigerant quantities.

2.Disconnect the cooler heater wiring, and conduit if equipped.

3.Remove entering and leaving chilled water temperature thermistors. Make sure to label thermistors as they are removed. See Fig. 6.

4.Disconnect and label the chilled water flow switch cable from the chilled water flow switch located on the leaving water nozzle. See Fig. 6.

5.Disconnect the suction pressure transducer cables from the transducers. Make sure to label cables as they are removed. See Fig. 6.

NOTE: The suction pressure transducers (SPT) do not neces- sarily need to be removed. However, use care in protecting the

SPTs throughout the removal and remote installation processes, as the SPTs are an important part of the remote installation.

6.Disconnect the electronic expansion valve (EXV) cables from the EXVs at each economizer. Make sure to label cables as they are removed. See Fig. 6.

NOTE: The 30XA080 units do not utilize an economizer. In this case, only the EXVs are present.

7.Unbolt the cooler suction flanges from the cooler. Tempo- rary supports may be needed to support the suction pipes. See Fig 6.

8.At each circuit’s economizer, cut the liquid lines going to the economizer assembly before the manual shutoff valve (see Fig. 6, cut 1, circuits A and B). Cut the cooler liquid lines between the manual shutoff valve and the cooler (see Fig. 6, cut 2, circuits A and B). Cut the economizer lines between the manual shutoff valve and the sensors (see Fig. 6, cut 3, circuits A and B).

9.Remove the screws from the feet of each economizer. Save all of the screws. Remove the economizers by care- fully sliding them out the cooler side of the unit.

10.Remove the screws from the cooler feet. Save all of the screws. Slide the cooler slightly to the left to clear the refrigerant tubing.

11.Remove the cooler by carefully sliding the cooler out the cooler side of the unit.

Because 30XA systems use polyolester oil, which can ab- sorb moisture, it is important to minimize the amount of time that the refrigeration system is left exposed to the at- mosphere. Minimizing the exposure time will reduce the amount of moisture that could possibly damage the unit. The removal instructions minimize the exposure time to prevent this type of damage. The remote installation in- structions outline a dehydration process to counteract any exposure that might have occurred.

Before installation of the field-supplied piping, the piping must be thoroughly cleaned and free of dirt, debris, oil, and welding residue. Presence of these objects will cause severe damage to the compressors or other components of the re- frigeration system.

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