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Trane Performance Air Handlers Manual de instalación Pagina 60

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60 CAH-SVX01B-EN
Coil Piping and Connections
Refrigerant Coil Piping
Note: Refer to “Important Environmental Concerns!” on page 2 for information on handling
refrigerants.
Use Figure 58 to determine the proper, relative sequence of the components in the refrigerant lines
that connect the condensing unit to an evaporator coil. Refer to “Examples of Field-Installed
Evaporator Piping” on page 63 for more detailed schematics of evaporator piping.
Liquid Lines
Line Sizing. Properly sizing the liquid line is critical to a successful split-system application. The
selected tube diameter must provide at least 5°F [2.7°C] of subcooling at the expansion valve
throughout the operating envelope. Increasing the size of the liquid line will not increase the
available subcooling.
Routing. Install the liquid line with a slight slope in the direction of flow so that it can be routed with
the suction line. Minimize tube bends and reducers because these items tend to increase pressure
drop and to reduce subcooling at the expansion valve. Liquid line receivers, other than those that
are factory-installed, are not recommended.
Figure 58. Example of placement for split-system components
Discharge
line
Manual
ball valve
Access
port
Filter
Access
port
Access
port
Filter drier
with access
port
Manual
angle valves
Check/relief
valve
Condensing unit
Condenser and
sbucooler coil
Compressors
Liquid line
Access
port
Manual
ball valve
Solenoid
valve
Moisture-
indicating
sight glass
Expansion
valves
Evaporator coil
Distriburtor
Manual ball valve
Suction lineFrostat™ control
Manual
ball valve
Kit with sensor - X13790452010 SEN-01212
Kit with switch - X13100429010 THT 02442
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