A.O. Smith ATX-199 Instruction Manual page 22

DIRECT VENT INSTALLATIONS
TWO-PIPE, DIRECT-VENT INSTALLATION
HOW TO INSTALL A TWO-PIPE, DIRECT-VENT SYSTEM
For Rooftop Terminations (page 36) for the proper
Hanger
Figure 14.
Figure 15. Two-Pipe Vertical Installation
WARNING
•
•
•
Breathing carbon monoxide can cause brain damage
or death. Always read and understand the instruction
manual.
Clearances
Hanger
Wall
Sidewall Vent
Terminations
Upper DIP
Switch
Bank
Lower DIP
Switch Bank
Figure 16. Location of DIP Switches
Installing a Three-Inch (76 mm) Direct Vent Connection
1.
2.
3.
3"(76 mm)
straight pipe
3" (76 mm) coupling
(included)
Intake vent collar
(Female)
Figure 17. 3" (76 mm) Vent Connection
Table 8. DIP Switch Settings: Three-Inch Direct Vent
5 to 20 ft
(1.5 to 6.1m)
(DEFAULT)
ON 1 2 3 4 5 6 7 8
OFF
Installing a Four-Inch (102 mm) Direct Vent Connection
1.
2.
3.
4" (102 mm)
straight pipe
3"x 4"
(76 x 102 mm)
adaptor
Intake vent collar
(Female)
Figure 18. Four-Inch (102 mm) Two-Pipe Vent Connection
22
3" (76 mm)
straight pipe
3" (76 mm) coupling
(included)
Exhaust vent collar
(Female)
21 to 40 ft 41 to 70 ft
(6.2 to 12.2 m) (12.3 to 21.3 m)
ON 1 2 3 4 5 6 7 8 ON 1 2 3 4 5 6 7 8
OFF OFF
4" (102 mm)
straight pipe
3"x 4"
(76 x 102 mm)
adaptor
Exhaust vent collar
(Female)