BCXC-SVX01A-EN
19
Mechanical
Requirements
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
thermal
expansion
valve (TXV)
liquid
line
filter drier
solenoid
valve
sight
glass
distributor
suction line
Evaporator Coil with
Standard Circuiting
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.
Figure I-MR-3. Field-installed evaporator piping example