Lennox Elite CBX32M-024 Installation Instructions Manual page 8

NOTE - See outdoor unit instructions on how to flow
nitrogen through line sets.
Step 1_ Remove access panel,
Step 2,, Remove the refrigerant line caps from the
refrigerant lines,
Step 3,, Use a wet rag to protect TXV sensing bulb (or
remove it) when brazing suction line
connections,
Step 4..
Step 5..
Step 6_
Step 7_
Step 8..
Place a wet rag against piping plate and around
the suction line connection, The wet rag must be
in place to guard against damage to the paint,
With the wet rag in place, position a field
provided elbow fitting to the air handler's suction
line and line set, Start nitrogen flow before
brazing,
After the procedure is completed then remove
the wet rag,
Place wet rag against piping plate and around
the liquid line connection. Position liquid line
elbow to air handler's suction line and to line set.
Start nitrogen flow and begin brazing both
connections and after procedure is completed
then remove both wet rags,
Refer to instructions provided with outdoor unit
for leak testing, evacuating and charging
procedures,
Step 9_ Install access panel,
Table 2. Refrigerant Line Sets
CBX32M Liquid Vapor/ L10 L15
Units Line No. Suction Line Line Sets Line Sets
-018/024 3/8 in 5/8 in L10-26 L15-26
(Smm) (16 mm) 20 ft. - 50 ft. 20 ft. - 50 fb
(6 m- 15 m) (6 m- 15 m)
-030,-036 3/8 in 3/4 in. L10-41 L15-41
(10 mm) (19mm 20 ft. - 50 ft. 20 ft. - 50 ft.
(6m-15m) (6m-15m)
-042, -048 3/8 in 7/8 in. L10-65 L15-65
(10 mm) (22 mm) 30 ft. - 50 ft. 30 ft. -50 ft.
(9 m- 15 m) (9 m- 15 m)
-060 3/8 in 1-1/8 in. Field Field
(10 ram) (29 ram) Fabricated Fabricated
Before connecting drain line(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,
Connect main condensate drain and route downward to an
open drain or sump. Do not connect drain to a closed waste
system. Refer to figure 9 on page 8 for typical condensate
trap configuration.
It is recommended that the auxiliary drain be connected to
a drain line for all units. If auxiliary drain is not connected, it
must be plugged with provided cap. For down-flow units,
the auxiliary drain shall be connected and routed to a drain.
See figure 10 for auxiliary and main drain locations,
The following practices are recommended to ensure
condensate removal as illustrated in figures 9 and 10:
• Drain piping should not be smaller than the drain
connections at drain pan.
• A trap must be installed in the main drain line,
• The trap must be deep enough to offset the difference
in static pressure between drain pan and atmosphere.
Generally, two inches is satisfactory for medium static
applications.
• Horizontal runs must be sloped 1 inch per 10 feet of
drain line to offset friction,
• An open vent in drain line will sometimes be required due
to line length, friction and static pressure,
• Drain construction and routing should facilitate future
cleaning and must not interfere with filter access,
• Auxiliary drain should run to an area where
homeowner will notice any drainage. The auxiliary
drain line does not required venting or a trap. Refer to
local codes.
VENT MUST EXTEND ABOVE THE HEIGHT OF THE COIL"
DRAIN PAN BY 2 INCHES (51 MM). VENT
DRAIN PAN
TRAP MUST BE DEEP ENOUGH TO OFFSET
MAXIMUM STATIC DIFFERENCE (GENERAL
2 INCHES [51MM]).
TRAP (49P66)
DRAIN LINE SHOULD SLOPE A MINIMUM 1 INCH PER
10 FEET (25 MM PER 3 M) TO APPROVED DRAIN
Figure 9. Typical Condensate Drain Connection
LEF%HAND UP-FLOW OR RIGHT-HAND
DISCHARGE DOWN-FLOW DISCHARGE
w
AUXILIARY DRAIN ON LEFT
oo ]
MAIN DRAIN ON RIGHT
Figure 10. Drain Locations
505342M 05/08
Page 8