Trane Modular 20 to 35 Tons Installationshandbuch PDF herunterladen (Seite 16)

Installation - Mechanical

16 CXRC-SVX01F-EN

Refrigerant Piping Recommendation

Isolate refrigerant lines from the building to prevent

transferring line vibration to the structure. Do not secure

lines rigidly to the structure at any point, as this will defeat

the unit isolation system.

Interconnecting Piping

Refrigerant piping must be properly sized and applied.

These two factors have significant effect on both system

performance and reliability.

Important: Cleanliness is extremely important during

system installation to minimize residual

contaminants, such as oxidization and

scale. See Brazing procedure in

Maintenance section.

See Table 6, p. 16 for recommended discharge and liquid

line sizes.Table also includes unit connections sizes.

Verify compressor oil levels are near top of sight glass or

above.

Verify remote condenser system is sealed by momentarily

depressing liquid line access port valve. If holding charge

is present, continue piping installation. If not, locate and

repair any leaks. See section “Refrigerant LeakTest

Procedure,” p. 22 and “System Evacuation Procedures,”

p. 23 in Maintenance.

Work on only one circuit at a time to minimize system

exposure to moisture in the air.

Capped discharge and liquid line connections are located

near bottom of the indoor unit, left side for SCRF/SIRF, right

side for SCRG/SIRG. CCRC/CIRC connections are located

in the unit front, at top.

Remove cap with a tube cutter to minimize risk of getting

chips inside piping.

Figure 17. Typical configuration for constant drain oil

trap, which can be used in place of a double-

riser system.

Table 6. Refrigerant connection and piping sizes, in.

Connection Size

Circuit 1 Circuit 2

CXRC Size Liquid Discharge Liquid Discharge

20, 29, 32 5/8 7/8 5/8 7/8

35, 40, 50 7/8 1 3/8 5/8 7/8

60 7/8 1 3/8 5/8 7/8

Circuit 1 Circuit 2

SXRF Size Liquid Discharge Liquid Discharge

20, 25, 29 5/8 7/8 5/8 7/8

30, 35, 40, 50 7/8 1 3/8 5/8 7/8

60 7/8 1 3/8 5/8 7/8

Circuit 1 Circuit 2

SXRG Size Liquid Discharge Liquid Discharge

20, 25, 32 5/8 7/8 5/8 7/8

Interconnecting Tube

SXRF/CXRC

Size

Circuit 1 Circuit 2

Liquid Discharge Liquid Discharge

20/20 5/8 7/8 5/8 7/8

25/29 5/8 1 1/8 5/8 7/8

29/29 5/8 1 1/8 5/8 7/8

30/35 7/8 1 1/8 5/8 7/8

35/35 7/8 1 1/8 5/8 7/8

40/40 7/8 1 3/8

(a)

(a) Use 1 1/8” for vertical risers.

5/8 7/8

50/50 7/8 1 3/8 5/8 1 1/8

60/60 7/8 1 3/8 7/8 1 3/8

Circuit 1 Circuit 2

SXRG/CXRC

Size Liquid Discharge Liquid Discharge

20/20 5/8 7/8 5/8 7/8

25/29 5/8 1 1/8 5/8 7/8

32/32 5/8 1 1/8 5/8 1 1/8

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 27 28

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