Trane CAH-SVX01A-EN manual Single-circuit evaporator coil with two distributors

Installation

Figure 36. Single-circuit evaporator coil with two distributors

Single-Circuit Condensing Units: Evaporator Coil with Two Distributors (see Figure 36)

1Pitch the liquid line slightly—

1 inch/10 feet [1 cm/3 m]—so the refrigerant drains toward the evaporator.

2Provide one expansion valve per distributor.

3Slightly pitch the outlet line from the suction header toward the suction riser—that is, 1 inch/

10 feet [1 cm/3 m] in the direction of flow. Use the tube diameter that matches the suction-header connection.

36

4Arrange the suction line so the refrigerant gas leaving the coil flows downward, past the lowest suction-header outlet, before turning upward. Use a double- elbow configuration to isolate the thermal expansion valve bulb from other suction headers.

5For horizontal tubing, use the tube diameter recommended by the condensing unit manufacturer.

6For 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.

7Pitch the suction line slightly—

1 inch/10 feet [1 cm/3 m]—so the refrigerant drains toward the evaporator.

8Insulate the suction line.

9Only use a “trim” solenoid valve for constant-volume, humidity- sensitive applications. For all other applications, install a single solenoid valve (the “pumpdown” solenoid valve) between the liquid-line filter drier and the sight glass.

CAH-SVX01A-EN