Trane Odyssey TTA0724 A/D B Series Application Manual page 21

Figure 12. Indoor coil with two distributors (single-circuit TTA/TWA units)
Notes:
1. Pitch the liquid line 1 inch per 10 feet (1 cm per 3 m) so that the liquid refrigerant drains toward the indoor coil. Use
the liquid-line size recommended in
2. Provide one expansion valve (TXV) per distributor.
TWA heat pumps only: Provide one check valve for each expansion valve.
3. Pitch the gas line leaving the coil so that it slopes away from the coil by 1 inch per 10 feet (1 cm per 3 m).
4. Use the DETINT to prevent oil and refrigerant migration when the unit is off. The DETINT also serves to isolate the
TXV bulb from suction-header conditions. See
5. For all coil branch circuits in the gas line, use a tube diameter that is one size smaller than the gas-line size
recommended in
6. For vertical risers, use the tube diameter recommended in
riser is at least 1 foot (30 cm) above the lowest point.
7. Pitch the gas line by 1 inch per 10 feet (1 cm per 3 m) toward the indoor coil.
8. Insulate the gas line.
SS-APG008H-EN
Table 2, p.
Table 2, p. 25 or Table 3, p.
25, or Table 3, p. 26.
"Line Sizing, Routing, and Component Selection," p.
26.
Table 2, p. 25
Refrigerant Piping Examples
or Table 3, p. 26. Ensure that the top of the
9.
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