Lennox EL195UHNE Series

Page 34
male tting into cold end header box. For furnaces
with a 3/4” Page 34 drain connection use a large at
head screw driver or a 1/2” drive socket extension
and remove plug. Install provided 3/4 NPT street
elbow tting into cold end header box. Use Teon
tape or appropriate pipe dope.
NOTE - Cold end header box drain plugs are factory
installed. 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 gure 51.
4 - Install drain trap using appropriate PVC ttings,
glue all joints. Glue the provided drain trap as
shown in gure 51. 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)
NOTE - In upflow applications where side return
sate trap, filter rack must be installed beyond
condensate trap or trap must be re-located to
avoid interference.
Trap
(same on
right side)
Plug
(same on left side)
1-1/2 in.
FIGURE 43
5 - Figures 46 and 48 show the furnace and evaporator
coil using a separate drain. If necessary the
condensate line from the furnace and evaporator
coil can drain together. See gures 47, 49 and
50. Upow furnace (gure 49) - In upow furnace
applications the eld 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 ooded heat exchanger
if the combined primary drain line were to become
restricted. Horizontal furnace (gure 50) - In
horizontal furnace applications the eld provided
vent must be a minimum 4” to a maximum 5” length
above the condensate drain outlet connection.
Any length above 5” may result in a ooded heat
exchanger if the combined primary 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.
NOTE - Appropriately sized tubing and barbed tting
may be used for condensate drain. Attach to the
drain on the trap using a hose clamp. See gure 44.
Field Provided Drain Components
Tubing
Hose Clamp
Barbed Fitting
Elbow
FIGURE 44
IMPORTANT
Do not use copper tubing or existing copper
condensate 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 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.
(Unit shownin upflow position withremote trap)
*5’ max.
To Drain
PVCPipeOnly
FieldProvidedVent
Min.1” AboveCondensate
Drain
Connection
1”
Min.
Trap CanBeInstalleda
Maximum 5’ From Furnac
e
2” Max.
CONDENSATE TRAP LOCATIONS
*Piping from furnace must slope down a
minimum 1/4” per ft. toward trap
FIGURE 45