Remote Cooler and Economizers Installa-
tion — Install the cooler and economizers in a remote location by following this procedure:
NOTE: Throughout the Remote Cooler and Economizers Installation steps, the two accessory package part no. (00EFN900003000A, 00EFN900003100A) have been short- ened to 3000A and 3100A. When a specific part is referred to in each accessory’s package, the package no. is mentioned fol- lowed by the item no. For item no. identification and accessory package contents, refer to Table 2.
1.After removing the cooler from the base unit, strip back the insulation on the cooler tube sheets (if required) and use the two large holes in the top corners for lifting.
2.Transport the cooler and economizer assemblies to the new location and secure them into position. Keep the economizer assemblies as close to the cooler as possible. Also, ensure there is sufficient room to install and remove cooler tubes from either end of the cooler. See Fig. 4A- 4D for tube removal clearances.
NOTE: The 30XA080 units do not utilize an economizer. In this case, keep the EXV as close to the cooler as possible.
3.Install the accessory-supplied economizer shutoff valves (3000A or 3100A: Item 1) and liquid line shutoff valves (3000A or 3100A: Item 2) on the two economizer lines and liquid lines at circuits A and B on the 30XA base unit. See Fig. 7.
4.At the new cooler location, connect the field-supplied cooler liquid line piping between the factory-installed manual shutoff valve at the two economizer assemblies and at the cooler. See Fig. 7.
5.Following good piping practices, install additional field- supplied liquid and economizer line piping in the required length to reconnect the two economizer assemblies to the 30XA base unit. See Fig. 8 for double suction riser con- struction detail.
Do NOT close both manual shutoff valves in one liquid line. Pressure can build up in the trapped area. To avoid the possibility of personal injury or property damage, the new liquid lines between the manual shutoff valves must each have field-supplied and installed pressure relief valves.
6.For 30XA080-120: all circuits and 30XA140-160: circuit B, cut the suction pipe (copper) at the 30XA base unit and discard (see Fig. 6, cut 4, circuit B). Following good piping practices, install field-supplied copper suction line piping from the 30XA base unit to the cooler. Use the accessory-supplied cooler pipe flange (3000A: Item 8), cooler flange O-ring (3000A: Item 12), and loose pipe flange (3000A: Item 11) to connect the field-supplied copper suction line piping at the cooler. See Fig. 9.
NOTE: The original flanges on the cooler and cut from the 30XA base unit may still be usable. However, Carrier recom- mends and has provided in the accessory kit, parts necessary to replace both the cooler pipe flange and the suction flange. When the extended piping is installed, these flanges should be replaced.
7.For 30XA140-160: circuit A and 30XA180-350: all circuits, unbolt (DO NOT CUT) the portion of the steel suction pipes that connected the flex connector flanges to the cooler at the 30XA base unit and discard. See Fig. 10. Refer to Table 6 for parts required (field-supplied or accessory-supplied) to make new connections at the
cooler and the 30XA base unit with the field-supplied steel suction line. See Fig 11. Follow good piping practices to install field-supplied steel suction line piping between the cooler and the flex connector at the 30XA base unit.
When field-supplied flanges and gaskets are used, an extra M16 mounting hole must be drilled and tapped to connect a mounting bracket at the 30XA base unit. See Fig. 10 and 11 for mounting bracket placement. See Fig. 12 for mounting hole locations.
If additional gaskets are needed for installation, they must be 1/16 in. non-asbestos fiber with synthetic rubber binder compressed gasket sheet. An extra mounting hole also needs to be field modified for any additional gaskets. See Fig. 12 for mounting hole locations. Field-supplied mounting nuts and bolts are also needed for field- supplied gaskets.
8.All of the piping connections are now complete. Leak test the unit and then pull a deep dehydration vacuum. Con- nect the vacuum pump to the high-flow access fitting at the bottom of the cooler, the liquid line service valves, and the economizer line service valves. For best results, it is recommended that a vacuum of at least 500 microns (0.5 mm Hg) be obtained. To perform a standing vacuum rise test, observe the rate-of-rise of the vacuum in the system. If the vacuum rises by more than 50 microns in a 30-minute time period, then continue the dehydration process until the standing vacuum requirement is met. This will ensure a dry system.
By following this dehydration procedure, the amount of moisture present in the system will be minimized, and the factory-supplied filter driers will provide adequate moisture protection. It is highly recommended that the filter drier cores be replaced after 24 hours of operation. This is to ensure that any foreign debris that is captured during start-up is removed from the system. Additional moisture removal capacity is also provided.
9.After setup is leak tested and deep dehydration vacuum is completed, install field-supplied suction and economizer line insulation between the economizer and the unit. If necessary, reinstall the insulation on the cooler head.
10.To reconnect the EXV cables, use the accessory-supplied cable assemblies (3000A or 3100A: Item 4). Two cables are needed for the 30XA080 unit, and four cables are needed for 30XA090-350 units. Take one cable assembly, and label both ends with “EXV-A” for the circuit A main EXV. Then label another three cable assemblies the same way with “EXV-B”, “ECEXV-A”, “ECEXV-B” for the circuit B main EXV, circuit A economizer EXV, and circuit B economizer EXV, respectively (economizer EXV does not apply to 30XA080 units).
Plug one side of the electrical connectors of the EXV labeled cables into their corresponding EXV plugs. Run the cables to the 30XA base unit, and plug the other side of the cable connectors into their corresponding EXV leads. Coil excess cables and wire tie in a convenient location.
11.To reconnect the flow switch cable, use the accessory- supplied cable assembly (3000A or 3100A: Item 4). Take one cable assembly and label both ends with “CWFS.” Plug one side of the electrical connector of the labeled cable into the flow switch plug. Run the cable to the base unit, and plug the other side of the cable connector into the flow switch lead. Coil excess cables and wire tie in a convenient location.
