Lennox SLP98DFV - Condensate Piping Installation

Page 26
Condensate Piping
This unit is designed for either right- or left-side exit of
condensate piping. Refer to gures 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, eld-provided ttings and
length of PVC pipe required to reach available drain.
2 - Use a large at head screw driver or a 1/2” drive
socket extension and remove plug (gure 34) from
the cold end header box at the appropriate location
on the side of the unit. Install provided 3/4 NPT
street elbow tting into cold end header box. Use
Teon 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)
Plug
(same on left
side)
1-1/2 in.
FIGURE 34
3 - Install the cap over the clean out opening at the
base of the trap. Secure with clamp. See gure 40.
4 - Install drain trap using appropriate PVC ttings, glue
all joints. Glue the provided drain trap as shown in
gure 40. Route the condensate line to an open
drain.
5 - Figure 37 shows the furnace and evaporator coil
using a separate drain. If necessary, the condensate
line from the furnace and evaporator coil can drain
together. See gures 38 and 39. The eld provided
vent must be a minimum 1” to a maximum 2” length
above the condensate drain outlet connection.
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 tting may
be used for condensate drain. Attach to the drain on the
trap using a hose clamp. See gure 35.
Field Provided Drain Components
Tubing
Hose Clamp
Barbed Fitting
Elbow
FIGURE 35