Page 39
31-5000726 Rev. 0
Tubing
Hose Clamp
Barbed Fitting
Elbow
Figure 41. Field-Provided Drain Components
Do not use copper tubing or existing copper condensate
lines for drain line.
CAUTION
1.
If unit will be started immediately upon completion of
installation, prime trap per procedure outlined in the
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
on the condensate trap and line. Heating cable kit is
available in various lengths; 6 ft. (1.8m) - kit no. 26K68;
24 ft. (7.3m) - kit no. 26K69; and 50 ft. (15.2m) - kit no.
26K70.
Condensate
DrainConnection
Field Provided Vent
(1” min. 2” max. above
condensate connection)
Evaporator drain
line required
(Trap at coil is optional)
Figure 40. Furnace with Evaporator Coil Using a
Separate Drain
(Unit shown in horizontal left-hand discharge position)
Piping from furnace and evaporator coil must slope down a minimum 1/4” per ft. toward trap
5’ max.
PVC Pipe Only
Evaporator
Coil
Drain Pan
Condensate
DrainConnection
Field Provided Vent
(4” min. to 5” max. above
condensate drain connection)
(Trap at coil is optional)
4”min
5”max
Figure 39. Furnace with Evaporator Coil Using a Separate Drain
