Water Heater Brochure

Specifications
540HX3
Temperature Settings
120°F (Default Setting)
100-140°F (5°F Increments)
Electric 120 V 60 Hz 1.63 Amps
Model Number* Type
Gas Consumption Input** Inlet Gas Pressure**
UEF
Minimum (BTU/H) Maximum (BTU/H) Minimum (in. W.C.) Maximum (in. W.C.)
ATI-540HX3-N Natural 15,000 199,000 4.0 10.5 0.93
ATO-540HX3-N Natural 15,000 199,000 4.0 10.5 0.95
ATI-340HX3-N Natural 15,000 180,000 4.0 10.5 0.95
ATO-340HX3-N Natural 15,000 180,000 4.0 10.5 0.94
ATI-240HX3-N Natural 15,000 160,000 4.0 10.5 0.94
ATO-240HX3-N Natural 15,000 160,000 4.0 10.5 0.95
ANSI Z21.10.3 • CSA 4.3
Model Number* Maximum GPM Hot/Cold Connections Gas Connection
Approx Shipping
Weight (lbs)
ATI-540HX3-N 10 3/4" NPT 3/4" NPT 73
ATO-540HX3-N 10 3/4" NPT 3/4" NPT 73
ATI-340HX3-N 8 3/4" NPT 3/4" NPT 72
ATO-340HX3-N 8 3/4" NPT 3/4" NPT 71
ATI-240HX3-N 6.6 3/4" NPT 3/4" NPT 72
ATO-240HX3-N 6.6 3/4" NPT 3/4" NPT 71
No annual descaling required
No scale buildup means the heater maintains like-new performance
longer
3" venting up to 70 equivalent feet
Recirc Capable
• Tankless water heaters with X3 Technology are approved to work
with an external recirculation pump and cross-over valve. See
training manual for full details.
Warranty
• No hardwater exclusions in the industry’s first “peace of mind”
limited warranty
• 15-year limited warranty on heat exchanger in residential
applications
• 5-year limited warranty on all parts in residential applications
• 1-year limited warranty on heat exchanger and parts in
commercial applications
• Refer to hotwater.com for further warranty details
Features
RESIDENTIAL CONDENSING WITH X3
®
SCALE
PREVENTION TECHNOLOGY
*For propane models, change “N” to “P”
**For propane models, minimum fire is 13,000 BTU/H, minimum inlet gas pressure is 8.0 in. W.C. and maximum inlet gas pressure is 14.0 in. W.C.
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