Lennox ELITE Series Installation Instructions Manual page 30

NOTE - If necessary the condensate trap may be installed
up to 5' away from the furnace. Use PVC pipe to connect
trap to furnace condensate outlet. Piping from furnace
must slope down a minimum of 1/4" per ft. toward trap.
CONDENSATE TRAP AND PLUG LOCATIONS
Trap
(same
on right
side)
1-1/2 in.
Figure 43
1 - Determine which side condensate piping will exit
the unit, location of trap, field-provided fittings and
length of PVC pipe required to reach available drain.
2 - Use a large flat head screw driver or a 1/2" drive
socket extension and remove plug (figure 43) from
the cold end header box at the appropriate location
on the side of the unit. Install provided 3/4 NPT street
elbow fitting into cold end header box. Use Teflon
tape or appropriate pipe dope.
NOTE - Cold end header box drain plugs are facto-
ry 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 figure 49.
4 - Install drain trap using appropriate PVC fittings, glue
all joints. Glue the provided drain trap as shown in
figure 49. Route the condensate line to an open
drain.
5 - Figure 46 shows the furnace and evaporator coil
using a separate drain. If necessary, the condensate
line from the furnace and evaporator coil can drain
together. See figures 47 and 48. The field provided
vent must be a minimum 1" to a maximum 2" length
above the condensate drain outlet connection.
6 - If unit will be started immediately upon completion of
installation, prime trap per procedure outlined in Unit
Start-Up section.
Plug
(same on left side)
Page 30
NOTE - If necessary the condensate trap may be installed
up to 5 feet away from the furnace. Piping from furnace
must slope down a minimum of 1/4" per ft. toward trap.
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 44.
Field Provided Drain Components
Elbow
Tubing
Figure 44
Condensate line must slope downward away from the trap
to drain. If drain level is above condensate trap, conden-
sate 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 possi-
ble, a heat cable kit may be used on the condensate trap
and line. Heat cable kit is available from Lennox in various
lengths; 6 ft. (1.8m) - kit no. 26K68; 24 ft. (7.3m) - kit no.
26K69; and 50 ft. (15.2m) - kit no. 26K70.
CONDENSATE TRAP LOCATION
(shown with right side exit of condensation)
Trap can be installed a maximum
of 5ft. from furnace (*PVC only)
Field Provided Vent
1" min. 2" max. above
condensate drain.
1" min.
2" max .
*Piping from furnace must slope down a
minimum 1/4" per ft. toward trap
Figure 45
Barbed Fitting
Hose Clamp
5' max.
to drain