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A.O. Smith ATI-340H-N Technical Documents

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Residential/Commercial Gas
Tankless Water Heaters
FEATURES
ULTRA-LOW NOx CONDENSING TECHNOLOGY PROVIDES UNPRECEDENTED
0.95 ENERGY FACTOR
DURABLE HEAT EXCHANGER
Primary Heat Exchanger is constructed of HRS35, a Commercial-Grade Copper that is more
resilient to erosion. HRS35 is 25x better at heat transfer than stainless steel thus stabilizing
outgoing water temperatures quicker
Secondary Heat Exchanger is made of Type 316L Stainless Steel to protect against corrosion
CONTINUOUS MAXIMUM FLOW RATES UP TO 10.0 GPM
ENERGY STAR
®
QUALIFIED
AVAILABLE IN NATURAL GAS OR PROPANE (LP)
ATI 540H & AT0 540H CAN BE USED IN BOTH RESIDENTIAL AND
COMMERCIAL APPLICATIONS
ELECTRONIC IGNITION -
NO PILOT LIGHT
INDOOR MODEL - INCLUDES A BUILT-IN TEMPERATURE CONTROLLER AND
ADVANCED DIAGNOSTICS TO SIMPLIFY TROUBLESHOOTING
OUTDOOR MODEL - INCLUDES A WALL MOUNT TEMPERATURE REMOTE
CONTROLLER AND ADVANCED DIAGNOSTICS TO SIMPLIFY TROUBLESHOOTING
FACTORY-INSTALLED POWER CORD INCLUDED FOR INDOOR MODELS
EASY-LINK UP TO 4 UNITS (540H MODELS ONLY)
With no additional parts or accessories needed
MULTI-LINK UP TO 20 UNITS (540H MODELS ONLY)
COMPLIES WITH LEAD FREE STANDARDS
SAFETY FEATURES:
Air-Fuel Ratio (AFR) Sensor
Exhaust & Water Temperature Safety Control
Overheat Cut-Off Fuse
INTERNAL FREEZE PROTECTION SYSTEM
POWER DIRECT VENT DESIGN
Exhaust, 3" PVC Venting up to 70 Feet or 4" PVC Venting up to 100 Feet
Provides flexible venting with PVC, CPVC, or ABS Pipe for Intake and Exhaust (solid core
only). Canadian Installations Require ULCS636 Listed PVC or CPVC Pipe for Venting.
Category IV Stainless Steel venting can also be use
d
ACCESSORIES
Pipe Cover
Neutralizer Kit
Isolation Valve Kits
Concentric Termination
WARRANTY
15-year limited warranty on heat exchanger in residential applications
10-year limited warranty on heat exchanger in commercial applications
5-year limited warranty on all parts
INDOOR MODELS
ATI-240H, ATI-340H, ATI-540H
OUTDOOR MODELS
ATO-240H, ATO-340H, ATO-540H
ANSI Z21.10.3 CSA 4.3
Page1of6
AOSRG46835
TANKLESS HIGH EFFICIENCY
CONDENSING MODELS
®
540 model
only
Revised March 2013
Residential/Commercial Gas
Tankless Water Heaters
Page 2 of 6
AOSRG46835
For Technical Information call 1-877-737-2840. A. O. Smith Corporation reserves the right to mak e product changes or improvements without prior notice.
TANKLESS HIGH EFFICIENCY CONDENSING MODELS
All dimensions are in inches.
15-150 psi Water Pressure. 40 psi or above is recommended for maximum flow.
*Current numbers based on factory testing; 0.4 GPM required for continuous fire after initial ignition.
Indoor models are certified from sea level to 10,100 ft. elevati
ons.
In accordance with ANSI Z21.10.3, CO emission does not exceed 400 PPM for normal input.
The manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligation.
MODEL
NUMBER
FUEL
TYPE
GAS CONSUMPTION
INPUT
INLET GAS
PRESSURE
ENERGY
FACTOR
MAX
GPM*
HOT/COLD
AND
GAS CONN.
DIMENSIONS IN INCHES
UNIT
WEIGHT
(LBS)
MINIMUM
BTU/H
MAXIMUM
BTU/H
MINIMUM
W.C.
MAXIMUM
W.C.
A
HEIGHT
B
WIDTH
C
DEPTH
INDOOR
ATI-240H-N Natural 15,000 160,000 5.0 10.5 0.95 6.6 3/4” NPT 23-5/8 17-3/4 11-1/4 58
ATI-240H-P Propane 13,000 160,000 8.0 14.0 0.95 6.6 3/4” NPT 23-5/8 17-3/4 11-1/4 58
ATI-340H-N Natural 15,000 180,000 5.0 10.5 0.95 8.0 3/4"NPT 23-5/8 17-3/4 11-1/4 58
ATI-340H-P Propane 13,000 180,000 8.0 14.0 0.95 8.0 3/4"NPT 23-5/8 17-3/4 11-1/4 58
ATI-540H-N Natural 15,000 199,000 5.0 10.5 0.95 10.0 3/4"NPT 23-5/8 17-3/4 11-1/4 59
ATI-540H-P Propane 13,000 199,000 8.0 14.0 0
.95 10.0 3/4"NPT 23-5/8 17-3/4 11-1/4 59
OUTDOOR
ATO-240H-N Natural 15,000 160,000 5.0 10.5 0.95 6.6 3/4” NPT 23-5/8 17-3/4 11-1/4 58
ATO-240H-P Propane 13,000 160,000 8.0 14.0 0.95 6.6 3/4” NPT 23-5/8 17-3/4 11-1/4 58
ATO-340H-N Natural 15,000 180,000 5.0 10.5 0.95 8.0 3/4"NPT 23-5/8 17-3/4 11-1/4 58
ATO-340H-P Propane 13,000 180,000 8.0 14.0 0.95 8.0 3/4"NPT 23-5/8 17-3/4 11-1/4 58
ATO-540H-N Natural 15,000 199,000 5.0 10.5 0.95 10.0 3/4"NPT 23-5/8 17-3/4 11-1/4 59
ATO-540H-P Propane 13,000 199,000 8.0 14.0
0.95 10.0 3/4"NPT 23-5/8 17-3/4 11-1/4 59
Residential/Commercial Gas
Tankless Water Heaters
Page3of6
AOSRG46835
ForTechnical Informationcall1-877-737-2840. A.O.Smith Corporationreservesthe right to make product changes orimprovements without priornotice.
7-7/8" (199 mm)
GAS 5-1/8" (131 mm)
COLD 6-3/4" (172 mm)
HOT 5-1/2" (140 mm)
7-1/2" (189 mm)
GAS 5-7/8" (147 mm)
Condensate drain port
COLD 5/8" (17 mm)
HOT 4-3/4" (120 mm)
17-5/8" (448 mm)
6-1/4" (159 mm)
5-3/4" (147 mm)
120 VAC 3" (77 mm)
120 VAC 6-7/8" (174 mm)
Drain port
Female
10-3/4" (272mm)
22-1/2" (570 mm)
Condensate drain port
4" (102 mm)
2-5/8" (68 mm)
Exhaust
Intake
Female
7-7/8" (199 mm)
7-1/2" (189 mm)
7" (180 mm)
4" (101 mm)
17-3/4" (450 mm)
HOT 4-3/4" (120 mm)
6-3/4" (170 mm)
COLD 5/8" (17 mm)
GAS 5-3/4" (147 mm)
Condensate drain port
23-5/8" (600 mm)
2-5/8" (65 mm)
5-3/4" (147 mm)
11-1/4" (285 mm)
1/2 (13 mm)
GAS 5-1/8" (131 mm)
HOT 5-1/2" (140 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
6-1/4" (159mm)
4" (102 mm)
24-7/8" (631 mm)
120 VAC 3" (77 mm)
Drain port 6" (152 mm)
120 VAC 6-7/8" (174 mm)
INDOOR MODEL
Page 4 of 6
AOSRG46835
ForTechnical Informationcall1-877-737-2840. A.O.Smith Corporationreservesthe right to make product changes orimprovements without priornotice.
17-5/8" (448 mm)
6-1/4" (159 mm)
COLD 5/8" (17 mm)
120 VAC 3" (77 mm)
HOT 5-1/2" (140 mm)
HOT 4-3/4" (120 mm)
7-1/2" (189 mm)
Condensate drain port
GAS 5-1/8" (131 mm)
COLD 6-3/4" (172 mm)
7-7/8" (199 mm)
Drain port
7-1/2" (189 mm)
10-3/4" (272 mm)
22-1/2" (570 mm)
120 VAC
Condensate drain port
7-7/8" (199 mm)
Condensate drain port
11" (281 mm)
1/2" (13 mm)
120 VAC 3" (77 mm)
GAS (131 mm)
HOT (140 mm)
COLD 6-3/4" (172 mm)
Condensate drain port
COLD 5/8" (17 mm)
GAS 5-3/4" (147 mm)
HOT 4-3/4" (120 mm)
6-3/4" (170 mm)
1-1/2" (37 mm)
11-1/4" (285 mm)
120 VAC 6-1/4" (159 mm)
17-3/4" (450 mm)
7" (180 mm)
23-5/8" (600 mm)
24-7/8" (631 mm)
3-5/8" (92 mm)
4-1/2" (114 mm)
Drain port 6" (152 mm)
Residential/Commercial Gas
Tankless Water Heaters
OUTDOOR MODEL
Residential/Commercial Gas
Tankless Water Heaters
Page 5 of 6
AOSRG46835
ForTechnical Informationcall1-877-737-2840. A.O.Smith Corporationreservesthe right to make product changes orimprovements without priornotice.
FLOW RATE vs TEMPERATURE RISE
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
0 20406080100120140
Flow Rate (GPM)
Temperature Rise (˚F)
Set temperature 125˚F (52˚C) or lower
Set temperature 130˚F (55˚C) or
higher
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
0 20406080100
Flow Rate (GPM)
540H
240H
340H
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
0 20406080100
Flow Rate (GPM)
Flow Rate vs. Temperature Rise Flow Rate vs. Temperature Rise
Temperature Rise (°F)
Flow Rate vs. Temperature Rise
Temperature Rise (°F)
Temperature Rise (°F)
PRESSURE LOSS
Residential/Commercial Gas
Tankless Water Heaters
Page 6 of 6
www.hotwater.com AOSRG46835
For Technical Information call 1-877-737-2840. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
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Specification
Water heater(s) shall be Model_________________ as manufactured by A. O. Smith Water Heaters, 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 3” or 4” Schedule 40 PVC, CPVC, or ABS vent pipe, or stainless steel Category III vent pipe at a distance not to exceed 70’ (equivalent) for 3” vent or 100’ (equivalent) for 4” vent,
term
inating vertically or horizontally as prescribed. Intake air pipe may be of such material as ABS, PVC, galvanized B-Vent, corrugated aluminum or stainless steel, or Category IV stainless steel not to exceed
70’ (equivalent) for 3” vent or 100’ (equivalent) for 4” vent.
The heater(s) shall be controlled by an onboard solid-state printed circuit board monitoring incoming and outgoing temperatures with factory installed thermistors, sensing and controlling flow rate t
o set point
temperature, controlling both air and gas mixture inputs to maintain thermal combustion efficiency. The heater(s) shall also consist of inline fusing, a spark ignition and sensor system, aluminized stainless steel
burners, an air-fuel ratio sensor, a hi-limit temperature switch, modulating and proportional gas valves, a freeze protection sensor with ceramic heating blocks, and an overheat cutoff fuse.
The water heater(s) shall be CSA listed, exceed the
energy efficiency requirements of ASHRAE 90.1b-1992, and shall comply with SCAQMD Rule 1146.2 Ultra-Low NOx Standards.
/