Page 11
CBX32MV SERIES
Table 3. CBX32MV Refrigerant Connections and
Line Set Requirements
Models
Liquid
Line
Vapor /
Suction
Line
L15 Line Set
−018/024
3/8"
(10mm)
5/8"
(16mm)
L15 line set sizes are
dependent on unit matchups.
See CBX32MV Engineering
Handbook to determine
correct line set sizes.
−024/030
and −036
3/8"
(10mm)
3/4"
(19mm)
−048
3/8"
(10mm)
7/8"
(22mm)
−060
3/8"
(10mm)
7/8"
(22mm)
Field−fabricated
−068
3/8"
(10mm)
1−1/8"
(29mm)
NOTE Some applications may required a field provided 7/8" to
1−1/8" adapter
NOTE When installing refrigerant lines longer than 50
feet, see the Lennox Refrigerant Piping Design and
Fabrication Guidelines, CORP. 9351−L9, or contact
Lennox Technical Support Product Applications for
assistance. To obtain the correct information from Lennox,
be sure to communicate the following information:
Installing the Condensate Drain
IMPORTANT
After removal of drain pan plug(s), check drain hole(s) to
verify that drain opening is fully open and free of any
debris. Also check to make sure that no debris has fallen
into the drain pan during installation that may plug up the
drain opening.
MAIN DRAIN
Connect the main drain and route downward to drain line or
sump. Do not connect drain to a closed waste system. See
Figure 13 for typical drain trap configuration.
OVERFLOW DRAIN
It is recommended that the overflow drain is connected to a
overflow drain line for all units. If overflow drain is not
connected, it must be plugged with provided cap.
For downflow orientation, the overflow drain MUST be
connected and routed to a overflow drain line. See Figure
13 for main and overflow drain locations based on coil
orientation.
LEFT−HAND AIR
DISCHARGE
MAIN DRAIN ON
RIGHT
OVERFLOW
DRAIN ON LEFT
UPFLOW OR
DOWNFLOW
RIGHT−HAND AIR
DISCHARGE
Figure 12. Main and Overflow Drain Locations
based on Coil Orientation
BEST PRACTICES
The following best practices are recommended to ensure
better condensate removal:
S Main and overflow drain lines should NOT be smaller
than both drain connections at drain pan.
S Overflow drain line should run to an area where
homeowner will notice drainage.
S It is recommended that the overflow drain line be
vented and a trap installed. Refer to local codes.
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