Condensate Drain Requirements; Main Drain; Overflow Drain; Best Practices - Lennox CBX32MV-018/024 Manual

WARNING
When using a high pressure gas such as
dry nitrogen to pressurize a refrigeration
or air conditioning system, use a regulator
that can control the pressure down to 1 or
2 psig (6.9 to 13.8 kPa).
CAUTION
Brazing alloys and flux contain materials which are
hazardous to your health.
Avoid breathing vapors or fumes from brazing operations.
Perform operations only in well ventilated areas.
Wear gloves and protective goggles or face shield to
protect against burns.
Wash hands with soap and water after handling brazing
alloys and flux.
Table 3. CBX32MV Refrigerant Connections and Line
Set Requirements
Vapor /
Liquid
Models Suction
Line
Line
3/8" 5/8"
-018/024
(10mm) (16mm)
-024/030 3/8" 3/4"
and -036 (10mm) (19mm)
3/8" 7/8"
-048
(10mm) (22mm)
3/8" 7/8"
-060
(10mm) (22mm)
3/8" 1-1/8"
-068
(10mm) (29mm)
NOTE — Some applications may require 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.
CBX32MV
L15 Line Set
L15 line set sizes are
dependent on unit matchups.
See CBX32MV Product
Specification bulletin to
determine correct line set
sizes.
Field-fabricated

Condensate Drain Requirements

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
OVERFLOW
DRAIN ON LEFT
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.
Page 22
UPFLOW OR RIGHT-HAND AIR
DOWNFLOW DISCHARGE
MAIN DRAIN ON
RIGHT