Vent Freezing Protection; Condensate Disposal - Nordyne SC038D-23A Installation Instructions Manual

Mounting Kit
Faceplate Secured
to Wall with Screws
Typical Both Pipes
Combustion
Air Inlet
Exhaust Vent
Left Side Option
Inlet Exhaust
Figure 6. Exhaust and Combustion Air
Pipe Clearances
Direct vent
terminal
50,000 Btuh
or less
Mechanical
draft vent
terminal
NOTES:
1. All dimensions shown are minimum
requirements.
2. Exterior vent terminations must be located at
least 12 In above the maximum expected snow level.
Figure 7 Vent Locations
Vent Configuration to
Provide 12" Minimum
height above
Snow Level.
Outside
Wall
1/2"
Armaflex
Insulation or
Equivalent
(if required)
Figure 8. Alternate Horizontal Vent Installation
Mechanical
Mechanical
draft vent
draft vent
terminal
terminal
3 ft.
12" Min.
19" Max.
Support
12" Above
Maximum
Expected
Snow Level
12' Above Maximum
Expected Snow Level
(Typ. Both pipes)
Figure 9. Vertical Vent Termination

Vent Freezing Protection

When the vent pipe is exposed to temperatures below
freezing (i.e., when it passes through unheated spaces,
chimneys, etc.) the pipe must be insulated with 1/2 inch
thick sponge rubber insulation, Armafl ex-type insulation
or equivalent. Insulating pipe is important to avoid
condensate icing.
Table 1 lists the maximum length of fl ue pipe that can travel
through an unconditioned space or an exterior space.
The total vent length must not exceed the lengths noted
in Table 15 (page 44). For Canadian installations please
refer to the Canadian Installation Code (CAN/CGA-B149.1
or 2) and/or local codes.
Maximum Flue Pipe Length
Winter Design
Temperature
Without Insulation
20
0
-20
* = Insulation thickness greater than 3/8 inch, based on
an R value of 3.5 (ft x F x hr) / (BTU x in.)
Table 1. Vent Protection

Condensate Disposal

The method for disposing of condensate varies according
to local codes. Consult your local code or authority having
jurisdiction. Neutralizer kit P/N 902377 is available for
use with this furnace. Please follow the instructions
provided with the kit.
This furnace has multiple options for positioning the
vent pipe as described in the section, Vent and Inducer
Assembly Options. Each of the condensate drain lines
must be J-trapped using fi eld supplied parts. After the
condensate lines are J-trapped, they may be combined
together when routed to the drain.
90° Elbow
in Unconditioned and
Exterior Spaces
With Insulation
(feet) (feet)*
45 70
20 70
10 60
13