20 Page
-DIP Switch Settings for Vent Length-
Single Pipe with Room-Air Intake
Horizontal Installaon
Wall
Hanger
Sidewall vent
Vertical
condensation
drain**
Backflow
preventer*
*Backflow preventer (Recommended for freezing weather conditions: 36 °F (2 °C) and below).
**Vertical condensation drain must be installed in accordance with local codes. It is required to be installed in the vent-
ing system when there is more than 5 ft. (1.5 m) of equivalent vent length, not including the sidewall termination. 90° elbow
is equivalent to 5 ft. (1.5 m) of vent length.
Vercal Installaon
Roof
Roof
Fire stop
Hanger
Vertical
condensation
drain**
Backflow
preventer*
Rain cap
Improper venting of this appliance can result in excessive levels of carbon
monoxide which can result in severe personal injury or death.
Improper installation can cause nausea or asphyxiation, severe injury
or death from carbon monoxide and flue gases poisoning. Improper
installation will void product warranty.
Specific DIP switch settings are required depending on the length of your
vent run and the type of vent installation. Refer to the following sections
for details:
Single Pipe with Room Air (page 20)
Two-pipe Direct Vent (page 21)
Vent kit of 9008900005 (page 22)
Outdoor Installation (page 22)
DANGER
110U Indoor (AT-KJr3U-IN)
310U Indoor (AT-K5U-IN)
510U Indoor (AT-D3U-IN)
(Upper bank of DIP switches)
Vent length
No. 6 : O N
No. 7 : OFF
No. 8 : OFF
No. 3 : O N
No. 4 : OFF
No. 5 : OFF
0 to 60 ft.
(0 to 18.3 m)
ON
ON
DIP switch settings for single pipe with room-air intake
To Next Page
Loading...
Need help?
General
