RTAA-SVX01A-EN 35
Installation — Remote Evaporator
3. Piping between the evaporator and outdoor unit is not to exceed 200
actual feet and/or an equivalent length of 300 feet. (The latter includes the
equivalent length of pressure drops of all associated field installed
fittings, valves, accessories, and straight lengths of interconnecting
piping including the suction accumulator.)
4. Horizontal portions of suction lines must be downward sloping toward
the compressor at least 1/2 inch for each 10 feet of run. This promotes
the movement of oil in the direction of gas flow.
5. Suction lines must be insulated.
6. The line sizes defined in Tab le 4, 5, and 6 are to be used only for 40-50 F
leaving water temperature and/or full-load ice-making applications.
NOTE: The factory must size piping for leaving water temperatures other
than 40-50 F.
Table 2 RTAA Circuit Capacities (nominal tons)
Model Circuit 1 Circuit 2
70 35 35
80 40 40
90 50 40
100 50 50
110 6 0 5 0
125 60 60
Table 3 Equivalent Lengths of Non-Ferrous Valves and Fittings (feet)
Line Size
Inches OD
Globe
Valve
Short Angle
Valve
Short Radius
ELL
Long Radius
ELL
1-1/8 87 29 2.7 1.9
1-3/8 102 33 3.2 2.2
1-5/8 115 34 3.8 2.6
2-1/8 141 39 5.2 3.4
2-5/8 159 44 6.5 4.2
3-1/8 185 53 8 5.1
Reproduced by permission of Air Conditioning and Refrigeration Institute
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