Lennox EL196UH030XE24B Information page 38

NOTE - Cold end header box drain plugs are factory in­
stalled. Check the unused plug for tightness to prevent
leakage.
3 - Install the cap over the clean out opening at the base
of the trap. Secure with clamp. See figure 54 or
NO TAG.
4 - Install drain trap using appropriate PVC fittings, glue
all joints. Glue the provided drain trap as shown in fig­
ure 54. Route the condensate line to an open drain.
Condensate line must maintain a 1/4" downward slope
from the furnace to the drain.
CONDENSATE TRAP AND PLUG LOCATIONS
(Unit shown in upflow position)
Trap
(same on
right side)
1-1/2 in.
NOTE - In upflow applications where side return
air filter is installed on same side as the conden­
sate trap, filter rack must be installed beyond
condensate trap or trap must be re-located to
avoid interference.
FIGURE 46
5 - Figures 49 and 51 show the furnace and evaporator
coil using a separate drain. If necessary the conden­
sate line from the furnace and evaporator coil can
drain together. See figures 50, 52 and 53.
Upflow furnace (figure 52) - In upflow furnace applica­
tions the field provided vent must be a minimum 1" to a
maximum 2" length above the condensate drain outlet
connection. Any length above 2" may result in a flood­
ed heat exchanger if the combined primary drain line
were to become restricted.
Horizontal furnace (figure 53) - In horizontal furnace
applications the field provided vent must be a mini­
mum 4" to a maximum 5" length above the condensate
drain outlet connection. Any length above 5" may re­
sult in a flooded heat exchanger if the combined pri­
mary drain line were to become restricted.
NOTE - In horizontal applications it is recommended to
install a secondary drain pan underneath the unit and
trap assembly.
Plug
(same on left side)
Page 38
NOTE - Appropriately sized tubing and barbed fitting may
be used for condensate drain. Attach to the drain on the
trap using a hose clamp. See figure 47.
Field Provided Drain Components
Elbow
Tubing
FIGURE 47
CAUTION
Do not use copper tubing or existing copper conden­
sate lines for drain line.
6 - If unit will be started immediately upon completion of in­
stallation, prime trap per procedure outlined in Unit Start-
Up section.
Condensate line must slope downward away from the
trap to drain. If drain level is above condensate trap,
condensate pump must be used. Condensate drain
line should be routed within the conditioned space to
avoid freezing of condensate and blockage of drain
line. If this is not possible, a heat cable kit may be used
on the condensate trap and line. Heating cable kit is
available from Lennox in various lengths; 6 ft. (1.8m) -
kit no. 26K68 and 24 ft. (7.3m) - kit no. 26K69.
Barbed Fitting
Hose Clamp