Lennox SIGNATURE SLP99UHV Installation Instructions Manual page 27

Field Provided Drain Components
Elbow
Tubing
FIGURE 40
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.
CONDENSATE TRAP LOCATIONS
(Unit shown in upflow position with remote trap)
FieldProvidedVent
Min. 1" Above Condensate
Drain Connection
2" Max.
Trap Can Be Installed a
Maximum 5' From Furnace
*Piping from furnace must slope down a
minimum 1/4" per ft. toward trap
FIGURE 41
Barbed Fitting
Hose Clamp
1" Min.
*5' max.
PV C PipeOnly
T o Drai n
Furnace With Evaporator
Coil Using A Separate Drain
(Trap at coil is optional)
Field Provided Vent
(1" min. 2" max. above
condensate connection)
Condensate
Drain Connection
Condensate Trap With Optional Overflow Switch
From Evaporator Coil
Optional
Page 27
Evaporator drain
line required
FIGURE 42
HorizontalFurnace4" Min. to 5" Max.above
condensatedrain connection)
FurnaceCondensate
DrainConnection
FIGURE 43