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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.
FIGURE 43
CONDENSATE TRAP LOCATION
(shown with right side exit of condensation)
5’ max.
to drain
Field Provided Vent
1" Min. 2" Max. Above
Condensate Drain
1" min.
Trap can be installed a
maximum of 5 ft. from furnace.
(*PVC Only)
*Piping from furnace must slope down a
minimum of 1/4" per ft. toward trap.
2" max.
FIGURE 44
EL195DF with Evaporator Coil
Using a Separate Drain
Drain
Evaporator Drain
Line Vent Required
Field−Provided Vent
(1" Min. to 2" Max. above
condensate drain connection)
Condensate
Drain Connection
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.
FIGURE 45
EL195DF with Evaporator Coil
Using a Common Drain
Field−Provided Vent
(1" Min. to 2" Max. above
condensate drain connection)
Condensate
Drain Connection
Evaporator Drain
Line Vent Required
FIGURE 46
Condensate Trap With Optional Overflow Switch
Field−Provided Vent
1" Min. to 2" Max.
above condensate drain connection)
Furnace Condensate
Drain Connection
From Evaporator Coil
To Drain
Optional
Overflow Switch
CAUTION
Do
not use copper tubing or existing copper
condensate lines for drain line.
