A.O. Smith ATI-310-N Technical Documents
Residential Gas
Tankless Water Heaters
TANKLESS RESIDENTIAL MODELS
Fully modulating, gas fired, tankless water heater with sealed combustion
(optional) and power vented flue.
FEATURES
CONTINUOUS MAXIMUM FLOW RATES UP TO 8.0 GPM
ENERGY STAR® QUALIFIED
MODELS INCLUDE REMOTE CONTROL AND POWER CORD
AVAILABLE FOR NATURAL GAS OR PROPANE (LP)
SAFETY FEATURES
■ Built in Freeze Protection
■ Manual Reset Hi Limit (Set at 185°F)
■ Overheat Cutoff Fuse
■ Inlet and Outlet Thermistors for Constant Temperature Monitoring
■ Air Fuel Ratio Rod
■ Flame Sensor
ATI-310-N
ATI-310-P
VENTING AND COMBUSTION
■ 4” 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
■ 3” Combustion Air Intake (with optional kit)
OPTIONAL ACCESSORIES
■ Direct Vent Conversion Kits
■ Complete Line of Stainless Steel Venting
■ Pipe Cover
■ Isolation Valve Kit
■ Concentric Termination Kits
WARRANTY
■ 15-year limited warranty on heat exchanger in residential applications
■ 5-year warranty on all parts
ANSI Z21.10.3 CSA 4.3
May 2013
CANRG46820
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RESIDENTIAL TANKLESS
9-1/2" (241mm)
2”
310 INDOOR DIMENSIONS
310 OUTDOOR DIMENSIONS
CLEARANCES:Top 36”, Bottom 12”, Front 24”, Back 1”,Sides 2”
310 Indoor/Outdoor Pressure Loss
Head
Feet
Pressure
Loss (psi)
0
1
2
3
4
5
6
7
8
9
020406080100 120140
Flow Rate (GPM)
Temperature Rise (°F)
Comparison of Fl ow Rates vs. Temperature Rise
CAPACITY & DIMENSIONS
Residential Gas
Tankless Water Heaters
GAS
MODEL
ATI 310 N NATURAL 11,000 190,000 0.82 5.0 10.5 8.0 20-1/2 13-4/5 8-1/2 120 0.77 4” O.D. 3” O.D. 3/4” NPT 43
ATI 310 P PROPANE 11,000 190,000 0.82 8.0 14.0 8.0 20-1/2 13-4/5 8-1/2 120 0.77 4” O.D. 3” O.D. 3/4” NPT 43
FUEL
TYPE
CONSUMPTION
INPUT
MIN.
BTU/H
MAX.
BTU/H
ENERGY
FACTOR
INLET GAS
PRESSURE
MIN.
MAX.
W.C.
W.C.
MAX
GPM*
DIMENSIONS IN INCHES
HEIGHT WIDTH DEPTH
VOLT AMP FLUE**
INTAKE
(OPTIONAL)
HOT / COLD
GAS CONN.
APPROX.
SHIPPING
All dimensions in inches.
15-150 psi water pressure. 40 psi or above recommended for maximum flow.
*Current numbers based on factory testing, 0.4 GPM required for continuous fire after initial ignition.
**Category III required
Pressure only relief valve requires (Min. 200,000 BTUs. 150 PSI). Min 40 PSI or above recommended for maximum flow.
310 Indoor/Outdoor Pressure Loss
Pressure
Loss (psi)
310 INDOOR DIMENSIONS
CLEARANCES:Top 12”, Bottom 12”, Front 24”, Back 1”, Sides 2”
CLEARANCES:Top 12”, Bottom 12”, Front 24”, Back 1”, Sides 2”
Head
Feet
CLEARANCES:Top 36”, Bottom 12”, Front 24”, Back 1”,Sides
Comparison of Fl ow Rates vs. Temperature Rise
9
8
7
6
5
4
3
Flow Rate (GPM)
2
1
0
020406080100 120140
Temperature Rise (°F)
310 OUTDOOR DIMENSIONS
WEIGHT
(LBS)
13-3/4" (350mm)
10" (254mm)
1-3/4" (45mm) 1-3/4" (45mm)
21-3/8"(544mm)
20-1/4"(520mm)
For Technical Information, call 1-888-479-8324. A. O. Smith reserves the right to make product changes or improvements without prior notice.
May 2013
1-7/8" (47mm)
COLD 3-1/4"(84mm)
HOT 5-1/4" (133mm)
Ø 3-9/8 " (101mm)
1-3/8" (36mm)
4-3/8"(11 3mm)
1-5/8" (43mm)
120V 1-3/8"(36mm)
GAS 4-7/8" (124mm)
COLD 2-7/8" (71mm)
120VAC 3-7/8" (99mm)
GAS 5-1/4" (135mm)
HOT 6-1/2" (164mm)
19-3/8" (493mm)
1" (26mm)
www.hotwatercanada.ca
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CANRG46820
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