Water Heater Brochure

RESIDENTIAL CONDENSING
Specifications
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-540H-N Natural 15,000 199,000 4.0 10.5 0.93
ATO-540H-N Natural 15,000 199,000 4.0 10.5 0.95
ATI-340H-N Natural 15,000 180,000 4.0 10.5 0.95
ATO-340H-N Natural 15,000 180,000 4.0 10.5 0.94
ATI-240H-N Natural 15,000 160,000 4.0 10.5 0.94
ATO-240H-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-540H-N 10 3/4" NPT 3/4" NPT 71
ATO-540H-N 10 3/4" NPT 3/4" NPT 69
ATI-340H-N 8 3/4" NPT 3/4" NPT 71
ATO-340H-N 8 3/4" NPT 3/4" NPT 69
ATI-240H-N 6.6 3/4" NPT 3/4" NPT 71
ATO-240H-N 6.6 3/4" NPT 3/4" NPT 69
Continuous maximum flow rates up to 10.0 GPM
Ultra-Low NOx gas tankless water heaters
540 models can be used in residential and commercial applications
EASY-LINK
TM
up to four 540H heaters or up to twenty 540H heaters
with multi-unit controller
Warranty
• 15-year limited warranty on heat exchanger in residential
applications
• 5-year limited warranty on heat exchanger in commercial
applications
• 5-year warranty on all parts
• Refer to hotwater.com for further warranty details
Features
*For propane models, change “N” to “P”
**For propane models, minimum fire rate 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.
Temperature Settings
120°F (Default Setting)
240H/340H: 100-140°F (5°F Increments)
540H: 100-160°F (5°F Increments)
Electric 120 V 60 Hz 1.5 Amps
540H only
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