Nordyne Downflow Condensing Furnace M3RL - Manual (Page 19)

19
36" max.
12" min.
Exhaust Vent
Option B
Exhaust Vent
Option A
Exhaust Vent
Option C
Mounting Kit
Faceplate Secured
to Wall with Screws 12" Min.
36" Max.
12" Min.
36" Max.
7" Min.
8" Min.
12" Min. to
Normal Snow Level
Combustion
Air Inlet
Grade
Level
or Normal
Snow
Inlet Exhaust
Figure 20. Vertical Vent Termination
A= 12" Above Roof or
Snow Accumulation Level
Figure 19. Exhaust and Combustion Air
Pipe Clearances
Elbow
Exhaust
Vent
Exhaust
Plumbing Vent
Roof Boot
(Typ. Both Pipes)
A
1"
5" Min.
36" Max.
10" Min.
Combustion
Air Intake
Figure 18. Alternate Horizontal
Vent Installation
Outside
Wall Support
Vent Configuration to
Provide 12" Minimum
height above
Snow Level.
1/2"
Armaflex
Insulation or
Equivalent
(if required)
12" Above
Normally
Expected
Snow
Level
12" Min.
19" Max.
DRAINAGE OF CONDENSATE
FROM FURNACE
! WARNING:
The condensate produced by the furnace
must be drained. Do not connect a water
supply to the drainage hose of the
furnace.
NOTE: The condensate drain should be pro-
tected from freezing when in unheated spaces.
The furnace is supplied with an internal conden-
sate drain trap.
! CAUTION:
Do not install additional traps in the
condensate drain.
The condensate drain may exit through the left
side panel, the right side panel, or through the
left or right hole on the bottom panel. (See Figure
21). Ensure that the flexible drain hose is not
kinked.
The condensate should drain from the plastic
collector box (location A in Figure 21) as drop-
lets or a small stream. If you notice the furnace
has operated for more than 5 minutes without
draining or the red status light on the control
board is pulsing a 2-blink code follow the steps
below.
Note: If terminations meet-
ing these vertical require-
ments exceed the maximum
height for safe transit, the
vent and combustion air in-
takes may be shipped with
the home for assembly on
site. The furnace must be
labeled to notify the installer/
user not to use the furnace
until the vent and combus-
tion air intake terminations
are installed.