A.O. Smith ATIO-910-N Technical Documents

A.O. Smith
Brand
A.O. Smith
Model
ATIO-910-N
Type
Technical Documents

A.O. Smith ATIO-910-N is a heavy-duty commercial gas tankless water heater designed for both indoor and outdoor use. It is capable of supplying hot water for various applications, including domestic hot water systems, hydronic heating systems, and radiant floor heating systems. The unit features a primary heat exchanger constructed of HRS35 commercial-grade copper, which is stronger and more resilient against erosion than standard copper. It has a continuous maximum flow rate of up to 14.5 GPM and can be linked up with up to 20 units using the TM-MC01 multi-unit controller.

A.O. Smith ATIO-910-N is a heavy-duty commercial gas tankless water heater designed for both indoor and outdoor use. It is capable of supplying hot water for various applications, including domestic hot water systems, hydronic heating systems, and radiant floor heating systems. The unit features a primary heat exchanger constructed of HRS35 commercial-grade copper, which is stronger and more resilient against erosion than standard copper. It has a continuous maximum flow rate of up to 14.5 GPM and can be linked up with up to 20 units using the TM-MC01 multi-unit controller.

Heavy-Duty Commercial Gas
Tankless Water Heaters
Designed specifically for heavy-duty commercial applications. Fully
modulating, gas-fired, tankless, water heaters with sealed combustion
(optional) and power vented flue. Can be installed either indoors or outdoors.
Capable of supplying hot water for domestic hot water systems (directly or
indirectly) using water storage tanks, recirculations systems, hydronic heating
systems, radiant floor heating systems, and/or combined domestic & heating
applications (local codes dictate proper compliance).
FEATURES
PRIMARY HEAT EXCHANGER IS CONSTRUCTED OF HRS35 COMMERCIAL-
GRADE COPPER
Stronger than standard copper and more resilient against erosion
Multi link up to 20 units with TM-MC01 (no multiple controller needed)
CONTINUOUS MAXIMUM FLOW RATES UP TO 14.5 GPM
EASY-LINK UP TO 4 UNITS
COMBINED INDOOR/OUTDOOR MODELS
AVAILABLE IN NATURAL GAS OR PROPANE (LP)
ASME MODELS AVAILABLE
LOW NOx EMISSIONS
COMPLIES WITH LEAD FREE STANDARDS
SAFETY FEATURES:
Built in Freeze Protection
Manual Reset Hi Limit (Set at 194°F)
Overheat Cutoff Fuse
Inlet and Outlet Thermistors for Constant Temperature Monitoring
Air Fuel Ratio Rod
GFI, Fuse & Surge Absorber
Flame Sensor
VENTING AND COMBUSTION
5” Category III Stainless Steel
Vertical or Horizontal Installation
50’ Max Length, 5 elbows max (90° elbows = 5’ equivalent length)
Power Vent
Electronic Ignition - No Pilot Light
5” Combustion Air Intake (with optional kit)
OPTIONAL ACCESSORIES
Multi-Unit Controller
Remote Temperature Controller
Direct Vent Conversion Kit
Pipe Cover
Vent Cap
Backflow Preventor
WARRANTY
5-year limited warranty on heat exchanger in commercial applications
5-year warranty on all parts
ATIO-910-N
ATIO-910-P
ATIO-910-AN
ATIO-910-AP
Page 1 of 2
Revised January 2013
AOSCG14001
TANKLESS HEAVY-DUTY
COMMERCIAL MODELS
ANSI Z21.10.3 CSA 4.3
248258 AOSCG14001.indd 1248258 AOSCG14001.indd 1 1/15/13 4:07 PM1/15/13 4:07 PM
Heavy-Duty Commercial Gas
Tankless Water Heaters
Revised January 2013 Page 2 of 2
www.hotwater.com AOSCG14001
For Technical Information call 1-877-737-2840. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
TANKLESS HEAVY-DUTY COMMERCIAL MODELS
8" (203mm)
5" (127mm)
24-7/8" (632.9mm)
28-7/8" (734mm)
25-1/4" (642mm)
2-1/2" (62.1mm)
1/2" (11.9mm)
12-1/4" (311.5mm)
5-7/8" (150mm) HOT
4-7/8" (122.9mm)
4" (100mm) 120V
7-3/8" (186mm)GAS
1-5/8" (40mm) COLD
15" (381mm)
1/2" (12.5mm)
7-5/8" (194.3mm) COLD
5
-3/8" (137.3mm) HOT
4-3/8" (110.8mm) GAS
6-3/4" (171.3mm) 120V
All dimensions in inches.
*ASME models
**Current numbers based on factory testing, 0.4 GPM required for continuous fire after initial ignition.
15 - 150 psi water pressure. Pressure only relief valve requires (Min. 380,000 BTUs. 150 PSI). Min 40 PSI or above recommended for maximum flow.
*** Category III required
CLEARANCES:
INDOOR: Top 12”, Bottom 12”, Front 24”, Back 0.5”, Sides 2”
OUTDOOR: Top 36”, Bottom 12”, Front 24”, Back 0.5”, Sides 2”
MODEL
NUMBER
FUEL
TYPE
GAS CONSUMPTION
INPUT
THERMAL
EFFICIENCY
INLET GAS
PRESSURE
GPM**
DIMENSIONS
(INCHES)
VOLT AMP FLUE*** INTAKE
HOT/COLD
GAS CONN.
APPROX.
SHIPPING
WEIGHT
(LBS)
MIN.
BTU/H
MAX.
BTU/H
MIN.
W.C.
MAX.
W.C.
HEIGHT WIDTH DEPTH
ATIO-910-N Natural 15,000 380,000 80% 5.0 10.5 0.5 - 14.5 25-3/10 24-4/5 11-4/5 120 1.48 5” O.D. 5” O.D. 1” NPT 113
ATIO-910-P Propane 15,000 380,000 82% 8.0 14.0 0.5 - 14.5 25-3/10 24-4/5 11-4/5 120 1.48 5” O.D. 5” O.D. 1” NPT 113
ATIO-910-AN* Natural 15,000 380,000 80% 5.0 10.5 0.5 - 14.5 25-3/10 24-4/5 11-4/5 120 1.48 5” O.D. 5” O.D. 1” NPT 113
ATIO-910-AP* Propane 15,000 380,000 82% 8.0 14.0 0.5 - 14.5 25-3/10 24-4/5 11-4/5 120 1.48 5” O.D. 5” O.D. 1” NPT 113
Flow Rate Vs. Temperature Rise
Flow Rate (gpm)
Temperature Rise (°F)
Flow Rate (gpm)
Pressure Loss (psi)
Head
Feet
Above shown rate is based on single unit only
Pressure Loss
Set temperature of 145° or lower Set temperature of 150° or higher
0
25 45 65 85 105 125 145
2
4
6
8
10
12
14
16
10.0
5.0
0.0
0
20
40
15
25
0
10
10
20
30
50
5
15.0
Set temperature of 145° or lower Set temperature of 150° or higher
Specification
Water heater(s) shall be Model _________________ as manufactured by A. O. Smith. The water heater(s) shall be a copper coil integral fin and tube construction with quick release brass or
bronze waterways. Heater(s) will be factory assembled and tested. The heater shall be vented with 5” Stainless steel Category III vent pipe a distance not to exceed 50’ (equivalent) feet
terminating vertically or horizontally as prescribed. Intake air with optional direct vent kit may be of such material as PVC not to exceed a total of 50’ (equivalent). The heater(s) shall be
controlled by onboard solid state printed circuit board monitoring incoming and outgoing temperatures with factory-installed thermistors, sensing and controlling flow rate to set point
temperature with control both air and gas mixture inputs to maintain thermal combustion efficiency. Unit also consists of ground fault interrupter, inline fusing, spark ignition and sensor
system, aluminized stainless steel burners, air-fuel ratio rod, Hi limit switch, modulating and proportional gas valves, freeze protection sensor and heating block and overhead cutoff fuses.
The water heater(s) shall be CSA listed, exceeds the energy efficiency requirements of ASHRAE 90. 1b-1992 and complies with SCAQMD rule 1146.2 and other air quality management
districts with similar requirements for low NOx emissions.
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A.O. Smith ATIO-910-N Technical Documents

A.O. Smith
Brand
A.O. Smith
Model
ATIO-910-N
Type
Technical Documents

A.O. Smith ATIO-910-N is a heavy-duty commercial gas tankless water heater designed for both indoor and outdoor use. It is capable of supplying hot water for various applications, including domestic hot water systems, hydronic heating systems, and radiant floor heating systems. The unit features a primary heat exchanger constructed of HRS35 commercial-grade copper, which is stronger and more resilient against erosion than standard copper. It has a continuous maximum flow rate of up to 14.5 GPM and can be linked up with up to 20 units using the TM-MC01 multi-unit controller.

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