31
B
PVC Intake/Combustion Air
B PVC
Vent/Exhaust
D
A
1
1
/
2
″
C
Model
A*
B
C
D**
KGAVT0601CVT
38
7
/
8
3
4
1
/
2
21
1
/
8
KGAVT0501CVT
33
3
/
8
2
3
1
/
2
16
5
/
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.
A07721
Fig. 30 -- Concentric Vent Dimensional Drawing
Concentric Termination Kit KGAVT0801CVT &
KGAVT0701CVT Venting Table for
PG9YAA Models
60,000 Btuh Furnaces
KGAVT0701CVT -- 35
′
& (4) 90
°
elbows with 2
″
PVC pipe or
KGAVT0801CVT -- 65
′
& (4) 90
°
elbows with 3
″
PVC pipe
80,000 Btuh Furnace
KGAVT0701CVT -- 35
′
& (4) 90
°
elbows with 2
″
PVC pipe or
KGAVT0801CVT -- 35
′
& (4) 90
°
elbows with 3
″
PVC pipe
100,000 Btuh Furnace
KGAVT0701CVT -- 25
′
& (3) 90
°
elbows with 2
″
PVC pipe or
KGAVT0801CVT -- 35
′
& (4) 90
°
elbows with 3
″
PVC pipe
1. Do not include the field supplied 45
°
elbow in the total el-
bow count.
2. If more 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.
NOTE: Feet of pipe is whichever pipe run is the longest,
either inlet
or
outlet side.
Table 4 – Concentric Termination Kit
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 Fig. 30
).
Do not use field supplied couplings to extend the pipes.
Airflow restriction will occur and the furnace pressure switch
may cause intermittent operation.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or
death.
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
gasses to be recirculated.
!
WARNING
Drill clearance hole in rain
cap and pilot hole in vent pipe.
Stainless steel screw
(Field supplied)
A07722
Fig. 31 -- Rain Cap to Vent Pipe Assembly
6. Install the Y concentric fitting and the pipe assembly
through the structure’s hole. For vertical termination, in-
stall the parts through the field supplied roof boot/flashing.
NOTE
: Do not allow insulation or other materials to accumulate
inside the pipe assembly when installing through the structure’s
hole.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or
death.
Do not operate the furnace with the rain cap removed as
recirculating of the flue gasses may occur. Water may also
collect inside the larger combustion air pipe and flow to the
burner enclosure.
!
WARNING
7. Secure the assembly to the structure as shown in Fig. 29 or
Fig. 33 using field supplied metal strapping or equivalent
material.
NOTE
: Ensure the termination height is above the roof surface
or anticipated snow level as shown in Fig. 29 for vertical
termination.
Ensure the termination location clearance
dimensions are as shown in Fig. 32 and Fig. 33 for horizontal
termination.
8. Install the rain cap and the small diameter pipe assembly
in the Y concentric fitting and the large pipe assembly.
Ensure that the small diameter pipe is bottomed out and
securely cemented in the Y concentric fitting.
1
″
max.
Maintain 12
″
clearance above highest antici-
pated snow level or grade whichever is greater.
Combustion
Air
Vent
12
″
min.
Roof Overhang
A07736
Fig. 32 -- Concentric Vent and Combustion--Air
Side Termination
9. Cement the furnace combustion air and vent pipes to the
concentric vent termination assembly. See Fig. 32 or Fig.
33 for proper pipe attachment.
PG9Y
AA
