Table of Contents
Advertisement
Condensate Piping
This unit is designed for either right or left side exit of
condensate piping in upflow applications. In horizontal
applications, the condensate trap must extend below the
unit. An 8" service clearance is required for the condensate
trap. Refer to Figure 33 for condensate trap locations.
NOTE: If necessary the condensate trap may be installed
up to 5 ft. away using PVC pipe from the furnace. Piping
from furnace must slope down a minimum of 1/4" per ft.
toward trap.
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 condensate trap, filter rack MUST be installed
beyond condensate trap or trap must be relocated to avoid
interference.
Figure 33. Condensate Trap and Plug Locations
(Unit shown in upflow position)
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 1/2" rachet drive or flat blade screw driver and
remove plug (Figure 33) from the cold end header
box at the appropriate location on the side of the unit.
Install field-provided 3/4 NPT male fitting into cold end
header 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 35.
4.
Install drain trap using appropriate PVC fittings; glue
all joints. Glue the provided drain trap as shown in
Figure 35. 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 36 and Figure 37 show 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 38 and Figure 39.
Upflow furnace (Figure 34) - In upflow furnace
applications, the field provided vent must be minimum
1" to a maximum 2" length above the condensate drain
outlet connection. Any length above 2" may result in a
flooded heat exchanger if the combined primary drain
Page 24 of 74
6.
Condensate line must slope downward away from the
Plug
trap to drain. If drain level is above condensate trap,
(same on
condensate pump must be used. Condensate drain line
left side)
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. (1.8 m) - kit no. 26K68; 24 ft. (7.3 m) -
kit no. 26K69; and 50 ft. (15.2 m) - kit no. 26K70.
Do not use copper tubing or existing copper condensate
lines for drain line.
A separate drain line must be run to the drain from the
condensate trap. DO NOT connect the condensate trap
drain into the drain line from the evaporator coil.
Issue 2346
line were to become restricted.
Horizontal furnace (Figure 36 or Figure 39) - In
horizontal furnace applications, the field provided vent
must be a minimum 4" to a maximum 5" length above
the condensate drain outlet connection. Any length
above 5" may result in a flooded heat exchanger if the
combined primary drain line were to become restricted.
NOTE: In horizontal applications it is recommended to
install a secondary drain pan underneath the unit and
trap assembly.
If unit will be started immediately upon completion of
installation, prime trap per procedure outlined in Unit
Start-Up section.
CAUTION
*Piping from furnace must slope down a minimum of 1/4" per
ft. toward trap.
Figure 34. Condensate Trap Locations
(Unit shown in upflow position with remote trap)
IMPORTANT
508364-01
Advertisement
Table of Contents
