Lennox EL296DFV Installation Instructions Manual page 33

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. Heat cable kit is avail­
able 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.
EL296DFV with Evaporator Coil
Using a Separate Drain
Field Provided Vent
1" min. 2" max. above
condensate drain.
Condensate
Drain Connection
Evaporator Drain Line
(vent required)
FIGURE 49
IMPORTANT
When combining the furnace and evaporator
coil drains together, the A/C condensate drain
outlet must be vented to relieve pressure in or­
der for the furnace pressure switch to operate
properly.
Field Provided Vent
1" min. 2" max. above
condensate drain.
Condensate Drain
Connection
Evaporator Drain
(vent required)
Condensate Trap With Optional Overflow Switch
From Evaporator Coil
Drain
Do not use copper tubing or existing copper
condensate lines for drain line.
Page 33
EL296DFV with Evaporator
Coil Using a Common Drain
Line
FIGURE 50
Field Provided Vent
1" min. 2" max. above
condensate drain.
FurnaceCondensate
DrainConnection
Optional
FIGURE 51
CAUTION