Lennox EL296UHV Installation Instructions Manual page 32

4 - Install drain trap using appropriate PVC fittings, glue
all joints. Glue the provided drain trap as shown in fig­
ure 52. 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 44
5 - Figures 48 and 49 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 47, 50 and 51.
Upflow furnace (figure 50) - 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
flooded heat exchanger if the combined primary drain
line were to become restricted.
Horizontal furnace (figure 51) - 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 32
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 45.
Field Provided Drain Components
Elbow
Tubing
FIGURE 45
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
installation, prime trap per procedure outlined in Unit
Start-Up section.
CONDENSATE TRAP LOCATIONS
(Unit shown in upflow position with remote trap)
Field ProvidedVent
Min. 1" Above Condensate
Drain Connection
1" Min.
2" Max.
*5' max.
PV CPipeOnly
Trap can be installed a
maximum 5' from furnace
*Piping from furnace must slope down a minimum of
1/4" per ft. toward trap.
FIGURE 46
Barbed Fitting
Hose Clamp
T o Drai n