Page 24
Field Provided Drain Components
Tubing
Hose Clamp
Barbed Fitting
Elbow
FIGURE 32
CAUTION
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, 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 pos-
sible, 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 shown in upflow position with remote trap)
*5’ max.
To Drain
PVCPipeOnly
FieldProvidedVent
Min. 1” AboveCondensate
DrainConnection
1” Min.
Trap Can Be Installed a
Maximum 5’ From Furnace
2” Max.
CONDENSATE TRAP LOCATIONS
*Piping from furnace must slope down a
minimum 1/4” per ft. toward trap
FIGURE 33
Furnace With Evaporator
Coil Using A Separate Drain
Condensate
DrainConnection
Field Provided Vent
(1” min. 2” max. above
condensate connection)
Evaporator drain
line required
(Trap at coil is optional)
FIGURE 34
HorizontalFurnace4” Min. to 5” Max.above
condensatedrain connection)
FurnaceCondensate
DrainConnection
From Evaporator Coil
Optional
Condensate Trap With Optional Overflow Switch
FIGURE 35