4.DimensionDmaybelengthenedto60"max.orshortenedby
cuttingthepipesto12"min.DimensionAwillchangeaccord-
ingtoDdimension.(SeeFigure44)
ConcentricVentDimensional
...........................................................................Drawing
B PVC
Vent/Exhaust
11/2"-- : _
PVC Intake/Combustion Air
A -_
25-22-03
Model A* B C D**
NAHA001CV 387/8 3 41/2 211/8
NAHA002CV 333/8 2 31/2 167/8
* = Dimension will change accordingly as dimension D is
lengthened or shortened.
**= Dimension D may be lengthened to 60" may also be
shortened by cutting the pipes provided in the kit to 12"
minimum
Concentric Termination Kit
Ta_i_ _ NAHA001 CV & NAHA002CV Venting
Table Dual Piping ONLY
50,000 & 75,000 Btuh Furnaces
NAHA002CV - 35' & (4) 90 ° elbows with 2" PVC pipe
NAHA001CV - 65' & (4) 90 ° elbows with 3" PVC pipe
100,000 Btuh Furnace
NAHA001CV - 65' & (4) 90 ° elbows with 3" PVC pipe
125,000 Btuh Furnace
NAHA001CV - 35' & (4) 90° elbows with 3" PVC pipe
1. Do not include the field supplied 45 °elbow in the total elbow
count.
2. If more than four elbows are required, reduce the length of
both the inlet and the exhaust pipes five feet for each
additional elbow used.
3. Elbows are DWV long radius type for 2" and 3" vents.
If more than four elbows are required, reduce the length of
both the inlet and exhaust pipes 5' for each additional elbow
used.
* Feet of pipe is whichever pipe run is the longest, either inlet
or outlet side.
If assembly needs to be extended to meet height or side wall
thickness requirement, the two pipes supplied in the kit may be
replaced by using the same diameter solid, single (no coupling
connections) field supplied SDR-26 PVC (ASTM D2241) pipes.
Do not extend dimension D more than 60". (See Figure 44)
Do not use field supplied couplings to extend the
pipes. Airflow restriction will occur and the furnace
pressure switch may cause intermittent operation.
Partially assemble the concentric vent termination kit.
Clean and cement the parts using the procedures for Join-
ing Pipe and Fittings section of the manual. A) Cement the
Y Concentric fitting to the 4" diameter kit pipe. (See
Figure 45) B) Cement the 3" rain cap to the 21/2" diameter
kit part. (See Figure 45) NOTE: A field supplied stainless
steel screw may be used to secure the rain cap to the pipe
instead of cementing when field disassembly is desired for
cleaning (See Figure 45)
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;i
25-22-02
Rain Cap to Vent Pipe Assembly
Drill clearance hole in rain
cap and pilot hole in vent pipe.
Stainless steel screw
(Field supplied)
Poison carbon monoxide gas hazard.
When using the alternate screw assembly
method, drill a clearance hole in the rain cap and
a pilot hole in the vent pipe for the screw size
being used. Failure to drill adequate holes may
cause cracking of the PVC components,
allowing flue gases to be recirculated.
Failure to follow this warning could result in
death, personal injury and/or property damage.
Poison carbon monoxide gas hazard.
Do not operate the furnace with the rain cap
removed as recirulation of the flue gases may
occur. Water may also collect inside the larger
combustion air pipe and flow to the burner
enclosure.
Failure to follow this warning could result in
death, personal injury and/or property damage.
Install the Y concentric fitting and the pipe assembly
through the structure's hole. For vertical termination, install
the parts through the field supplied roof boot/flashing.
NOTE: Do not allow insulation or other materials to accu-
mulate inside the pipe assembly when installing through
the structure's hole.
Secure the assembly to the structure as shown in
Figure 43 or Figure 47 using field supplied metal strap-
ping or equivalent material.
NOTE: Ensure the termination height is above the roof sur-
face or anticipated snow level as shown in Figure 43 for
vertical termination. Ensure the termination location clear-
ancedimensions areas shown in Figure 46and Figure 47
for horizontal termination.
440 01 101004 E_
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