A.O. Smith ATO-340H-P Technical Documents | Page 4
4 Page
Specifications
Installation Manual
SPECIFICATIONS
*40 psi or above is recommended for maximum flow.
** The Manifold Pressure is the factory setting and generally should not need adjustment.
NOTE:
• Checktheratingplatetoensurethisproductmatchesyourspecifications.
• InaccordancewithANSIZ21.10.3,COemissiondoesnotexceed400PPMfornormalinput.
• The manufacturer reserves the right to discontinue, or change at any time, specifications or designs
without notice and without incurring obligation.
Model
240
Indoor
(T-H3J-DV)
240
Outdoor
(T-H3J-OS)
340
Indoor
(T-H3S-DV)
340
Outdoor
(T-H3S-OS)
540
Indoor
(T-H3-DV)
540
Outdoor
(T-H3-OS)
Natural Gas Input
(OperatingRange)
BTU/h
Min.: 15,000
Max.: 160,000
Min.: 15,000
Max.: 180,000
Min.: 15,000
Max.: 199,000
Propane Input
(OperatingRange)
BTU/h
Min.: 13,000
Max.: 160,000
Min.: 13,000
Max.: 180,000
Min.: 13,000
Max.: 199,000
Gas Connection
3/4" NPT
Water Connections
3/4" NPT
Water Pressure*
psi
(MPa)
15 - 150 (0.1 - 1)
Natural gas
Inlet Pressure
" W.C.
(kPa)
Min. 5.0 (1.24)
Max. 10.5 (2.61)
Propane
Inlet Pressure
" W.C.
(kPa)
Min. 8.0 (1.99)
Max. 14.0 (3.48)
Manifold
Pressure**
Natural
Gas
" W.C.
(Pa)
1.50
(373)
1.70
(423)
2.45
(610)
2.1
(523)
2.95
(734)
2.70
(672)
Propane
" W.C.
(Pa)
2.10
(523)
1.90
(473)
2.7
(672)
2.55
(635)
3.3
(821)
3.15
(784)
Weight
lbs. (kg) 58 (26.3) 58 (26.2) 58 (26.3) 58 (26.2) 59 (26.8) 59 (26.9)
Dimensions
inch
H 22.4 x W 17.7 x D 10.7
H 570 x W 450 x D 272
mm
Ignition
Electric Ignition
Electric
Supply
VAC/Hz
120 / 60
Consump
tion
Operation
W / A
72.7 / 0.61
78.2 / 0.65
89.0 / 0.74
Standby
W / A
3.1 / 0.03
3.1 / 0.03
4.2 / 0.04
Freeze-
Protection
W / A
174 / 1.5
174 / 1.5
175 / 1.5
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