Lennox ELITE Series Installation Instructions Manual page 31

EL195UH NON−DIRECT VENT APPLICATION
USING EXISTING CHIMNEY
SIZE TERMINATION
PIPE PER TABLE 6.
Minimum 12" (305MM)
above chimney top
plate or average snow
accumulation
INSULATE
TO FORM
SEAL
NOTE − Do not discharge exhaust gases directly into any chimney or vent stack. If ver-
tical discharge through an existing unused chimney or stack is required, insert piping
inside chimney until the pipe open end is above top of chimney and terminate as illus-
trated. In any exterior portion of chimney, the exhaust vent must be insulated.
Condensate Piping
This unit is designed for either right- or left-side exit of con-
densate piping in upflow applications. In horizontal applica-
tions, the condensate trap must extend below the unit. An
8" service clearance is required for the condensate trap.
Refer to figure 45 for condensate trap locations. Figure 49
shows trap assembly using 1/2" PVC or 3/4" PVC.
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 − Remove plug (figure 45) from the cold end header box
at the appropriate location on the side of the unit. Install
field−provided 1/2 NPT male fitting into cold end head-
er box. Use Teflon tape or appropriate pipe dope.
3 − Install the cap over the clean out opening at the base of
the trap. Secure with clamp. See figure 49.
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STRAIGHT−CUT OR
ANGLE−CUT IN DIRECTION
OF ROOF SLOPE
EXHAUST VENT
1/2" (13mm)
WEATHERPROOF
INSULATION
SHOULDER OF FITTINGS
PROVIDE SUPPORT
OF PIPE ON TOP PLATE
SHEET
METAL TOP
PLATE
EXTERIOR
PORTION OF
CHIMNEY
FIGURE 44
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CONDENSATE TRAP AND PLUG LOCATIONS
(Unit shown in upflow position)
Trap
(same on
right side)
1−1/2 in.
NOTE − In upflow applications where side return
air filter is installed on same side as the conden-
sate trap, filter rack must be installed beyond
condensate trap or trap must be re−located to
avoid interference.
4 − Install drain trap using appropriate PVC fittings, glue
all joints. Glue the provided drain trap as shown in fig-
ure 49. Route the condensate line to an open drain.
Condensate line must maintain a 1/4" downward slope
from the furnace to the drain.
NOTE − Vinyl tubing may be used for condensate drain.
Tubing must be 1−1/4" OD X 1" ID and should be
attached to the drain on the trap using a hose clamp.
Do not use copper tubing or existing copper conden-
sate lines for drain line.
5 − 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,
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
Page 31
Plug
(same on left side)
FIGURE 45
CAUTION