Page 60
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.
FIGURE 42
(Unit shown in upflow position with remote trap)
*5’ max.
To Drain
PVCPipeOnly
FieldProvidedVent
Min. 1” Above Condensate
Drain
Connection
1”
Min.
Trap Can Be Installed a
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 43
Horizontal Furnace4” Min. to 5” Max.above
condensate drain connection)
Furnace Condensate
DrainConnection
From Evaporator Coil
Optional
Condensate Trap With Optional Overflow Switch
CAUTION
Do not use copper tubing or existing copper conden
sate lines for drain line.
FIGURE 44
SLP99UHV With Evaporator
Coil Using A Separate Drain
Condensate
Drain
Connection
Field Provided Vent
(1” min. 2” max. above
condensate connection)
Evaporator drain
line required
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