Field-Installing Evaporator Piping; Field-Installed Evaporator Piping Example - Trane BCHC Installation & Operation Manual

BCXC-SVX01A-EN
Installation
Field-Installing Evaporator
Piping
See Figure I-MR-3 and refer to the
instructions below to field-install
evaporator piping.
1 Pitch the liquid line slightly—1 in./10 ft
[1 cm/3 m] — 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 in./10 ft [1 cm/3 m] in the
direction of flow. Use the tube diameter
suction line
Figure I-MR-3. Field-installed evaporator piping example
Mechanical
Requirements
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 vapor leaving the coil flows
downward, below the suction-header
outlet, before turning upward.
6 Pitch the suction line slightly—1 in./10 ft
[1 cm/3 m] — so the refrigerant drains
toward the evaporator.
7 Insulate the suction line.
sight
glass
thermal solenoid
expansion valve
valve (TXV)
distributor
Evaporator Coil with
Standard Circuiting
liquid
line
filter drier
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