American Standard CUX1B040A9241A Installation, Operation And Maintenance Manual page 14

Installation Instructions
MAXIMUM VENT LENGTH:
DIRECT VENT (2 PIPE SYSTEM) -
MAXIMUM TOTAL EQUIVALENT FEET FOR
VENT AND INLET AIR PIPES (See Notes)
2" PIPE
MODEL & FITTINGS
CUX1B040A2941A
CUX1B060A9361A
CUX1B080A9421A
CUX1C100A9481A NOT ALLOWED
CUX1D100A9601A NOT ALLOWED
CUX1D120A9601A NOT ALLOWED
NOTES:
1. The INLET AIR of one pipe systems require the installation of a 90° elbow (to prevent dust and debris from falling straight into the furnace) and a 2 foot
horizontal or vertical straight pipe section connected before or after the elbow.
2. DO NOT MIX PIPE DIAMETERS IN THE SAME LENGTH OF PIPE OUTSIDE THE FURNACE CABINET (Except adapters at the top of the furnace). If
different inlet and vent pipe sizes are used, the vent pipe must adhere to the maximum length limit shown in the table above (See Note 7 below for
exception). The inlet pipe can be of a larger diameter, but never smaller than the vent pipe.
3. MAXIMUM PIPE LENGTHS MUST NOT BE EXCEEDED! THE LENGTH SHOWN IS NOT A COMBINED TOTAL, IT IS THE MAXIMUM LENGTH OF
EACH (Vent or Inlet air pipes in two pipe systems).
4. One standard radius 90° elbow is equivalent to 12' of 4" pipe; one SHORT radius 90° elbow is equivalent to 10' of 3" pipe and one LONG radius elbow is
equivalent to 6' of 3" pipe. One SHORT/LONG radius 90° elbow is equivalent to 7½' of 2½" pipe, & 5' of 2" pipe. Two 45° elbows equal one 90°elbow.
5. The termination tee or bend must be included in the total number of elbows. If the BAYVENT100 termination kit is used, the equivalent length of pipe is 5
feet. There is zero equivalent length for the BAYVENT200.
6. Pipe adapters are field supplied.
7. 4" pipe may be reduced to 3" for termination with BAYAIR30AVENTA or BAYVENT200 without additional length restriction.
8. For Canadian applications ONLY, IPEX 196006 may be used for horizontal and vertical terminations. IPEX 081216, IPEX 081218, and IPEX 081219 may
only be used for horizontal vent terminations. Equivalent lengths are IPEX 196009 = 5 feet, IPEX 081216 = 11 feet, IPEX 081218 = 16 feet, and IPEX
081219 = 21 feet
MAXIMUM VENT LENGTH:
DIRECT VENT (2 PIPE SYSTEM) -
MAXIMUM TOTAL EQUIVALENT FEET FOR
VENT AND INLET AIR PIPES (See Notes)
MODEL & FITTINGS
CDX1B040A9241A
CDX1B060A9361A
CDX1B080A9421A
NOT ALLOWED
CDX1C100A9481A
CDX1D120A9601A NOT ALLOWED
NOTES:
1. The INLET AIR of one pipe systems require the installation of a 90° elbow (to prevent dust and debris from falling straight into the furnace) and a 2 foot
horizontal or vertical straight pipe section connected before or after the elbow.
2. DO NOT MIX PIPE DIAMETERS IN THE SAME LENGTH OF PIPE OUTSIDE THE FURNACE CABINET (Except adapters at the top of the furnace).
If different inlet and vent pipe sizes are used, the vent pipe must adhere to the maximum length limit shown in the table above (See Note 7 below for exception).
The inlet pipe can be of a larger diameter, but never smaller than the vent pipe.
3. MAXIMUM PIPE LENGTHS MUST NOT BE EXCEEDED! THE LENGTH SHOWN IS NOT A COMBINED TOTAL, IT IS THE MAXIMUM LENGTH OF EACH
(Vent or Inlet air pipes in two pipe systems).
4. One standard radius 90° elbow is equivalent to 12' of 4" pipe; one SHORT radius 90° elbow is equivalent to 10' of 3" pipe and one LONG radius elbow is
equivalent to 6' of 3" pipe. One SHORT/LONG radius 90° elbow is equivalent to 7½' of 2½" pipe, & 5' of 2" pipe. Two 45° elbows equal one 90°elbow.
5. The termination tee or bend must be included in the total number of elbows. If the BAYVENT100 termination kit is used, the equivalent length of pipe is 5 feet.
There is zero equivalent length for the BAYVENT200.
6. Pipe adapters are field supplied.
7. 4" pipe may be reduced to 3" for termination with BAYAIR30AVENTA or BAYVENT200 without additional length restriction.
8. For Canadian applications ONLY, IPEX 196006 may be used for horizontal and vertical terminations. IPEX 081216, IPEX 081218, and IPEX 081219 may only be used
for horizontal vent terminations. Equivalent lengths are IPEX 196009 = 5 feet, IPEX 081216 = 11 feet, IPEX 081218 = 16 feet, and IPEX 081219 = 21 feet
g
UPFLOW FURNACE
B
Air Inlet
A
Page 14
UPFLOW / HORIZONTAL VENTING TABLE TABLE 8
2-1/2" PIPE 3" PIPE
& FITTINGS & FITTINGS
60 80 100
60 80 100
50 80 100
40 100
40 100
15 60
DOWNFLOW / HORIZONTAL VENTING TABLE - TABLE 9
2" PIPE 2-1/2" PIPE 3" PIPE
& FITTINGS & FITTINGS
60 80
50 80
45 80
80
15
SINGLE PIPE VENTING
A (0-2') or greater
B (0-2') or greater
A+B = 2' minimum
Vent only
to outside
NONDIRECT VENT (1 PIPE SYSTEM) -
MAXIMUM TOTAL EQUIVALENT FEET FOR
VENT PIPE ONLY (See Notes)
4" PIPE 2" PIPE
& FITTINGS & FITTINGS
130 50
130 50
130 40
130 NOT ALLOWED
130 NOT ALLOWED
130 NOT ALLOWED
NONDIRECT VENT (1 PIPE SYSTEM) -
MAXIMUM TOTAL EQUIVALENT FEET FOR
VENT PIPE ONLY (See Notes)
4" PIPE 2" PIPE
& FITTINGS & FITTINGS
100 130 50
100 130 50
100 130 40
100 130 NOT ALLOWED
60 130 NOT ALLOWED
Air Inlet
2-1/2" PIPE 3" PIPE
& FITTINGS & FITTINGS
80 80
80 80
80 80
40 80
40 80
25 70
2-1/2" PIPE 3" PIPE
& FITTINGS & FITTINGS
80 80
80 80
80 80
80 80
25 70
DOWNFLOW
FURNACE
Vent only
to outside
A
A = 2' minimum
4" PIPE
& FITTINGS
130
130
130
130
130
130
4" PIPE
& FITTINGS
130
130
130
130
130
Pub. No. 41-5016-12