CLCH-SVX07C-EN
93
Coil Piping and Connections
Dual-Circuit Condensing Unit: Evaporator Coil with Four Distributors
Figure 82. Dual-circuit evaporator coil with four distributors
1.
Pitch the liquid line slightly—1 inch/10 feet
—so 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. Arrange 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.
5. For horizontal tubing, use the tube diameter
recommended by the condensing unit
manufacturer.
6. 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.
7.
Pitch the suction line slightly—1 inch/
10 feet —so the refrigerant drains toward
the evaporator.
8. Insulate the suction line.
9. The top of the Circuit 1 suction riser must be
higher than the bottom evaporator coil. Use
the tube diameter recommended by the
condensing unit manufacturer for the riser.
10. The top of the Circuit 2 suction riser must be
higher than the top evaporator coil. Use the
tube diameter recommended by the
condensing unit manufacturer for the riser.
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Страница 100: ...96 CLCH SVX07C EN Installation Electrical Figure 84 Typical VFD wiring schematic ...
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