©September 2017 A. O. Smith Corporation. All rights reserved.
www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015
Page 1 of 2
AOSCG14001
Commercial Gas
Tankless Water Heaters
PRIMARY HEAT EXCHANGER IS
CONSTRUCTED OF COMMERCIAL-
GRADE COPPER
• Stronger than standard copper and more resilient
against erosion
• Copper provides 25x better heat transfer than
stainless steel thus stabilizing outgoing water
temperature quicker and reducing pressure drop
across the heat exchanger.
CONTINUOUS MAXIMUM FLOW RATES
UP TO 14.5 GPM
EASY-LINK UP TO 4 UNITS
• Multi link up to 10 units with TM-MC01 multi unit
controller
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
TANKLESS HEAVY-DUTY
COMMERCIAL MODELS
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) and can be used with water storage tanks, recirculation systems, and/or combined
domestic & heating applications.
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
• 6-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
ANSI Z21.10.3 CSA 4.3
©September 2017 A. O. Smith Corporation. All rights reserved.
www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015
Page 2 of 2
AOSCG14001
Commercial Gas
Tankless Water Heaters
For technical information, call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
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 and meet the energy efficiency requirements of ASHRAE 90. 1b-1992.
*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
Model Number
Fuel
Type
Gas Consumption
Input
Thermal
Efficiency
Inlet Gas
Pressure
GPM***
Dimensions in Inches
Volt AMP Flue*** Intake
Hot/
Cold Gas
Conn.
Approx.
Shipping
Weight
(lbs)
Min.
BTU/H
Max.
BTU/H
Min. In.
W.C.
Max. In.
W.C.
Height Width Depth
ATIO-910-N Natural 15,000 380,000 80% 4 10.4 0.5-14.5 25-1/4 24-7/8 12-3/4 120 1.48 5" O.D. 5" O.D. 1" NPT 113
ATIO-910-P Propane 15,000 380,000 82% 8 14 0.5-14.5 25-1/4 24-7/8 12-3/4 120 1.48 5" O.D. 5" O.D. 1" NPT 113
ATIO-910-AN* Natural 15,000 380,000 80% 4 10.4 0.5-14.5 25-1/4 24-7/8 12-3/4 120 1.48 5" O.D. 5" O.D. 1" NPT 113
ATIO-910-AP* Propane 15,000 380,000 82% 8 14 0.5-14.5 25-1/4 24-7/8 12-3/4 120 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
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
-3/8" (137.3mm) HOT
4-3/8" (110.8mm) GAS
6-3/4" (171.3mm) 120V
