29
Rev. 0
CONDENSATE DRAIN LINES
AND DRAIN TRAP
Upright Installations
In an upright installation drain hoses are connected to drain
ports on the rubber elbow and the recuperator coil front
cover. The drain lines are then routed through the right or
left side panel and into the drain trap secured to the outside
of the cabinet.
Note: Refer to
Condensate Drain Lines and Drain Trap -
Alternate Vent/Flue Hose Connections section for upright
installations using an alternate vent/flue outlet .
Standard Right or Left Side Drain Hose Connections
Upright installations using the
standard vent/flue outlet re-
quire drain hoses to be connected as follows. The follow-
ing quantity of hoses, tubes, and hose clamps are provided
with the unit.
HOSE A
QTY: 1
HOSE B
QTY: 1
TUBE 1
QTY: 1
HOSE CLAMPS
QTY: 6
TUBE 2
QTY: 2
Hose and Tube Identification
1. Remove the rubber plug from the front cover drain port
(right or left side, depending on the intended drain trap
mounting).
2. Secure Hose A to front cover drain port with a hose
clamp. Route hose to rear side panel grommet hole.
Note: For left side drainage, grommets will have to be relo-
cated to left side panel.
Condensate Drain Lines and Drain Trap
General
A condensing gas furnace achieves its high level of effi-
ciency by extracting almost all of the heat from the prod-
ucts of combustion and cooling them to the point where
condensation takes place. The condensate which is gen-
erated must be piped to an appropriate drain location.
In
upright installations, the furnace’s drain hoses may exit
either the right or left side of the furnace. Note: If the alter-
nate vent/flue outlet is utilized in an upright installation, the
drain trap and drain connections must be located on the
same side as the alternate vent/flue outlet.
In
horizontal installations, the drain hoses will exit through
the bottom (down side) of the unit with the drain trap sus-
pended beneath the furnace. The field-supplied drain sys-
tem must be in accordance with all local codes and the
instructions in the following sections.
WARNING
In upright upflow installations, the drain trap must be
mounted on the opposite side of the unit from the junc-
tion box. This will reduce the risk of water reaching the
junction box in the event of a blocked drain condition.
Failure to follow these instructions can result in pos-
sible death, personal injury, or property damage due
to electrical shock.
Follow the bullets listed below when installing the drain sys-
tem. Refer to the following sections for specific details con-
cerning furnace drain trap installation and drain hose hook
ups.
•
The drain trap supplied with the furnace must be used.
•
The drain line between furnace and drain location
must be constructed of 3/4” PVC or CPVC.
•
The drain line between furnace and drain location
must maintain a 1/4 inch per foot downward slope
toward the drain.
•
Do not trap the drain line in any other location than at
the drain trap supplied with the furnace.
•
Do not route the drain line outside where it may freeze.
•
If the drain line is routed through an area which may
see temperatures near or below freezing, precautions
must be taken to prevent condensate from freezing
within the drain line.
•
If an air conditioning coil is installed with the furnace,
a common drain may be used. An open tee must be
installed in the drain line, near the cooling coil, to re-
lieve positive air pressure from the coil’s plenum. This
is necessary to prohibit any interference with the func-
tion of the furnace’s drain trap.
