Lennox SLP99DFV Series User Manual

Page 53
CONDENSATE TRAP LOCATION
(shown with right side exit of condensation)
5’ max.
to drain
1” min.
2” max.
Trap can be installed a maximum
of 5ft. from furnace (*PVC only)
Field Provided Vent
1” min. 2” max. above
condensate drain.
*Piping from furnace must slope down a
minimum 1/4” per ft. toward trap
FIGURE 42
Furnace with Evaporator Coil
Using a Separate Drain
Drain
Field Provided Vent
1” min. 2” max. above
condensate drain.
Condensate
Drain Connection
Evaporator Drain Line
(vent required)
FIGURE 43
IMPORTANT
When combining the furnace and evaporator coil
drains together, the A/C condensate drain outlet
must be vented to relieve pressure in order for the
furnace pressure switch to operate properly.
Furnace with Evaporator
Coil Using a Common Drain
Field Provided Vent
1” min. 2” max. above
condensate drain.
Evaporator Drain Line
(vent required)
Condensate
Drain Connection
FIGURE 44
HorizontalFurnace4” Min.to5” Max.above
condensatedrain connection)
FurnaceCondensate
Drain
Connection
From Evaporator Coil
Optional
Condensate Trap With Optional Overflow Switch
FIGURE 45
CAUTION
Do not use copper tubing or existing copper
condensate lines for drain line.

Lennox SLP99DFV Series Specifications

General

Brand	Lennox
Model	SLP99DFV Series
Category	Furnace
Language	English