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31-5000729 Rev. 0
Condensate Piping
This unit is designed for either right- or left-side exit of
condensate piping. Refer to Figure 41 for condensate trap
locations.
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.
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.
For furnaces with a 1/2” drain connection use a 3/8 allen
wrench and remove plug (Figure 41) 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 header box. For furnaces with a 3/4” drain
connection use a large flat head screw driver or a 1/2”
drive socket extension and remove plug. 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
installed. Check the unused plug for tightness to prevent
leakage.
3.
Install the cap over the clean out opening at the base of
the trap. Secure with clamp. See Figure 47 or Figure 48.
4.
Install drain trap using appropriate PVC fittings, glue all
joints. Glue the provided drain trap as shown in Figure
47 or Figure 48. Route the condensate line to an open
drain. Condensate line must maintain a 1/4” downward
slope from the furnace to the drain.
5.
Figure 44 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
Figure 46. The field provided vent must be a minimum
1” to a maximum 2” length above the condensate drain
outlet connection.
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 42.
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,
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.
Figure 41. Condensate Trap and Plug Locations
Trap
(same on
right side)
Plug
(same on left
side)
1-1/2 in.
Tubing
Hose Clamp
Barbed Fitting
Elbow
Figure 42. Field-Provided Drain Components
Do not use copper tubing or existing copper condensate
lines for drain line.
CAUTION
