CLCH-SVX07C-EN 89
Coil Piping and Connections
Examples of Field-Installed Evaporator Piping
Single-Circuit Condensing Unit: Evaporator Coil with One Distributor
Figure 78. Single-circuit evaporator coil with one distributor
1. Pitch the liquid line slightly—1 inch/10 feet —so that the refrigerant drains toward the
evaporator.
2. Provide one expansion valve per distributor.
3. Slightly pitch the outlet line from the suction header toward the suction riser—that is, 1 inch/
10 feet in the direction of flow. Use the tube diameter that matches the suction-header
connection.
4. For the vertical riser, use the tube diameter recommended by the condensing unit
manufacturer. Assure the top of the riser is higher than the evaporator coil.
5. Arrange the suction line so the refrigerant gas leaving the coil flows downward, past the lowest
suction-header outlet, before turning upward.
6. Pitch the suction line slightly—1 inch/10 feet —so the refrigerant drains toward the evaporator.
7. Insulate the suction line.
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