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In a basement installation, the pipes may be run between the joist
spaces. If the pipes must go below the joist and then up into the
last joist space to penetrate the header, two 45° elbows should be
used to reach the header rather than two 90° elbows.
V
/I
T
ENT
NTAKE
ERMINATIONS
D
V
F
IRECT
ENT
URNACES
If more than one direct vent furnace is to be installed vertically
through a common roof top, maintain the same minimum clear-
ances between the exhaust vent and air intake terminations of
adjacent units as with the exhaust vent and air intake terminations
of a single unit.
If more than one direct vent furnace is to be installed horizontally
through a common side wall, maintain the clearances as in the
following figure. Always terminate all exhaust vent outlets at the
same elevation and always terminate all air intakes at the same
elevation.
24" Max.
Horizontal Venting Of Multiple Units
C
V
T
ONCENTRIC
ENT
ERMINATION
Refer to the directions provided with the Concentric Vent Kit (DCVK)
for installation specifications.
X. CONDENSATE DRAIN LINES & DRAIN TRAP
G
ENERAL
A condensing gas furnace achieves its high level of efficiency by
extracting almost all of the heat from the products of combustion
and cooling them to the point where condensation takes place.
The condensate which is generated must be piped to an appropri-
ate drain location.
In upright installations, the furnace's drain hoses may exit either
the right or left side of the furnace. NOTE: If the alternate 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 suspended be-
neath the furnace. The field-supplied drain system must be in
accordance with all local codes and the instructions in the follow-
ing sections.
Follow the bullets listed below when installing the drain system.
Refer to the following sections for specific details concerning fur-
nace 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.
F
I
M
OR
NSTALLATION OF
ULTIPLE
Vents
90°
Medium
Radius
Elbows
3" Min.
24" Max.
3" Min.
24" Max.
3" Min.
Screen
•
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
relieve positive air pressure from the coil's plenum.
This is necessary to prohibit any interference with the
function of the furnace's drain trap.
U
I
PRIGHT
NSTALLATIONS
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 Section X, Condensate Drain Lines and Drain Trap
- Alternate Vent/Flue Hose Connections for upright installations
using an alternate vent/flue outlet.
S
R
L
TANDARD
IGHT OR
EFT
Upright installations using the standard vent/flue outlet require drain
hoses to be connected as follows. The following quantity of hoses,
tubes, and hose clamps are provided with the unit.
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 red hose
clamp. Route hose to rear side panel grommet hole.
NOTE: For left side drainage, grommets will have to be relocated
to left side panel.
RED HOSE
FRONT COVER
CLAMP
DRAIN PORT
Upright "Standard" Connections - Right Side
18
S
D
H
C
IDE
RAIN
OSE
ONNECTIONS
RIGHT SIDE
PANEL
RUBBER
ELBOW
RUBBER ELBOW
DRAIN PORT
SILVER HOSE CLAMP
TUBE 1
HOSE
SIDE PANEL
B
GROMMET
HOLES
TUBE(S) 2
HOSE
DRAIN
GREEN
A
TRAP
HOSE
CLAMPS
(3 PLACES)
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