SS-APG008H-EN
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Figure 10. TWA heat pump and matched indoor coil (typical arrangement shown in cooling mode)
bi-directional heat pump lter
bi-directional heat pump lter
Notes:
1. Each coil distributor requires one thermal expansion valve (TXV) and one check valve. See Table 3, p. 26, and , for
recommendations.
2. For applications where the length of the liquid line exceeds 80 ft (24 m) and the heat pump will start in the cooling
mode, remove the liquid-line filter driers from the TWA heat pump and install new filter driers and check valves
(Table 3, p. 26) at the indoor unit.
3. Shutoff valves are a field installed option and no longer come standard from the factory.
Refrigerant Piping Examples
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