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Water Heater Brochure

ManualsBrandsA.O. Smith ManualsWater HeatersX3 - 5.8 GPM at 60° F Rise - 0.95 UEF - Propane Tankless Water Heater - Indoor
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Accessories
Dimensions
Recess Box
Retrofit:
(100298009)
New Construction:
(100306285)
Pipe Cover
(100112718)
Remote
Temperature
Controller
(100276687)
X3 cartridge
3-1/2”
Gas 5-1/8”
Drain port 6”
Hot 6-1/2”
Cold 6-3/4”
120 VAC 6-4/5”
Condensate drain port
7-7/8”
1/2”
11-1/4”
5-3/4”
17-5/8”
6-1/4”
17-3/4”
7”
3”
Female
3”
Female
4”
Drain port
X3 cartridge
X3 cartridge
1-3/5”
4-2/5”
Hot 6-3/4”
Drain port
Hot 6-3/4”
1-3/5”
4-2/5”
7-1/2”
Condensate drain port
Condensate drain port
7-1/2”
120 VAC 3”
Gas 5-3/4”
120 VAC 3”
Gas 5-3/4”
Cold 5/8”
X3 cartridge
3-1/2”
Gas 5-1/8”
Drain port 6”
Hot 6-1/2”
Cold 6-3/4”
120 VAC 6-4/5”
Condensate drain port
7-7/8”
1/2”
11-1/4”
5-3/4”
17-5/8”
6-1/4”
17-3/4”
7”
3”
Female
3”
Female
4”
Drain port
X3 cartridge
X3 cartridge
1-3/5”
4-2/5”
Hot 6-3/4”
Drain port
Hot 6-3/4”
1-3/5”
4-2/5”
7-1/2”
Condensate drain port
Condensate drain port
7-1/2”
120 VAC 3”
Gas 5-3/4”
120 VAC 3”
Gas 5-3/4”
Cold 5/8”
X3 cartridge
3-1/2”
Gas 5-1/8”
Drain port 6”
Hot 6-1/2”
Cold 6-3/4”
120 VAC 6-4/5”
Condensate drain port
7-7/8”
1/2”
11-1/4”
5-3/4”
17-5/8”
6-1/4”
17-3/4”
7”
3”
Female
3”
Female
4”
Drain port
X3 cartridge
X3 cartridge
1-3/5”
4-2/5”
Hot 6-3/4”
Drain port
Hot 6-3/4”
1-3/5”
4-2/5”
7-1/2”
Condensate drain port
Condensate drain port
7-1/2”
120 VAC 3”
Gas 5-3/4”
120 VAC 3”
Gas 5-3/4”
Cold 5/8”
X3 cartridge
3-1/2”
Gas 5-1/8”
Drain port 6”
Hot 6-1/2”
Cold 6-3/4”
120 VAC 6-4/5”
Condensate drain port
7-7/8”
1/2”
11-1/4”
5-3/4”
17-5/8”
6-1/4”
17-3/4”
7”
3”
Female
3”
Female
4”
Drain port
X3 cartridge
X3 cartridge
1-3/5”
4-2/5”
Hot 6-3/4”
Drain port
Hot 6-3/4”
1-3/5”
4-2/5”
7-1/2”
Condensate drain port
Condensate drain port
7-1/2”
120 VAC 3”
Gas 5-3/4”
120 VAC 3”
Gas 5-3/4”
Cold 5/8”
Model Number
Clearances (inches)
Top Bottom Side Front
ATI-540HX3-N 12 12 3 4
ATO-540HX3-N 36 12 3 24
ATI-340HX3-N 12 12 3 4
ATO-340HX3-N 36 12 3 24
ATI-240HX3-N 12 12 3 4
ATO-240HX3-N 36 12 3 24
12