Lennox SLP98DFV Installation Instructions Manual page 26

Condensate Piping
This unit is designed for either right- or left-side exit of
condensate piping. Refer to figures 34 and 36 and for con-
densate trap locations.
NOTE - If necessary the condensate trap may be installed
up to 5' away from the furnace. Use PVC pipe to connect
trap to furnace condensate outlet. Piping from furnace
must slope down a minimum of 1/4" per ft. toward trap.
1 - Determine which side condensate piping will exit
the unit, location of trap, field-provided fittings and
length of PVC pipe required to reach available drain.
2 - Use a large flat head screw driver or a 1/2" drive
socket extension and remove plug (figure 34) from
the cold end header box at the appropriate location
on the side of the unit. Install provided 3/4 NPT
street elbow fitting into cold end header box. Use
Teflon tape or appropriate pipe dope
NOTE - Cold end header box drain plugs are factory in-
stalled. Check the unused plug for tightness to prevent
leakage.
CONDENSATE TRAP AND PLUG LOCATIONS
Trap
(same on
right side)
1-1/2 in.
FIGURE 34
3 - Install the cap over the clean out opening at the
4 - Install drain trap using appropriate PVC fittings, glue
5 - Figure 37 shows the furnace and evaporator coil
NOTE - If necessary the condensate trap may be installed
up to 5 feet away from the furnace. Piping from furnace
must slope down a minimum of 1/4" per ft. toward trap.
NOTE - Appropriately sized tubing and barbed fitting may
be used for condensate drain. Attach to the drain on the
trap using a hose clamp. See figure 35.
Plug
(same on left
side)
Page 26
base of the trap. Secure with clamp. See figure 40.
all joints. Glue the provided drain trap as shown in
figure 40. Route the condensate line to an open
drain.
using a separate drain. If necessary, the condensate
line from the furnace and evaporator coil can drain
together. See figures 38 and 39. The field provided
vent must be a minimum 1" to a maximum 2" length
above the condensate drain outlet connection.
Field Provided Drain Components
Elbow
Tubing
FIGURE 35
Barbed Fitting
Hose Clamp