Submittal Sheet

For technical information call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
© February 2018 A. O. Smith Corporation. All Rights Reserved
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COMMERCIAL-GRADE
RESIDENTIAL COMBI BOILERS
Page 2 of 2
AOSRG45018
K
J
L
Q
M N T U
P
O
S
R
Q
R
O
P
N
M
B
A
E
D
G
I
F
H
C
D
I
G
F
E
H
110 Models
TOP
150-199 Models
TOP
BOTTOM
FRONT
Model
Number*
Gas Consumption Input
AFUE%
Heating
Capacity
BTU/H
Net AHRI
Rating
BTU/H**
Minimum
in. W.C.†
Maximum
in. W.C.
GPM at
77°F Rise
Water Connections
Gas
Connection
Approx.
Shipping
Weight (lbs)
Minimum
BTU/H
Maximum
BTU/H
Space
Heating
DHW
Indoor Models
ACB-110S-N 11,000 110,000 95.0 102,000 89,000 4.0 14.0 2.6 1” NPT 3/4” NPT 1/2” NPT 139
ACB-150S-N 15,000 150,000 95.0 139,000 121,000 4.0 14.0 3.6 1” NPT 3/4” NPT 1/2” NPT 142
ACB-199S-N 19,999 199,999 95.0 185,000 161,000 4.0 14.0 4.8 1” NPT 3/4” NPT 1/2” NPT 159
Model Number
Dimensions
A B C D E F G H I
ACB-110S-N 32-1/2” 17-1/4” 18” 14-3/4” 2-3/4” 6-1/2” 2-3/4” 2” 3-1/2”
ACB-150S-N 32-1/2” 18-3/4” 18” 6-3/4” 2-3/4” 6-3/4” 11-3/4” 2-1/2” 6-1/4”
ACB-199S-N 32-1/2” 18-3/4” 18” 5-1/2” 2-3/4” 6-3/4” 11-1/2” 2-1/4” 5-1/2”
*S Models can operate up to 4,500’. For high altitude (3,000’ - 9,600’), change S to H. For liquid propane (LP), change N to P.
†For LP, minimum supply pressure is 8.0 in. W.C.
**The Net AHRI Water Ratings shown are based on a piping and pickup allowance of 1.15.
The manufacturer should be consulted before selecting a boiler for installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems, etc.
The ratings have been determined under the provisions governing forced draft boilers.
Model Number
Dimensions
J K L M N O P Q R
ACB-110S-N 8-3/4” 13-1/2” 2-3/4” 9” 10-1/2” 5” 14-1/2” 12-3/4” 5”
ACB-150S-N 2-3/4” 13-1/2” 3” 9” 11-1/2” 5” 6-1/4” 13-3/4” 6”
ACB-199S-N 2-3/4” 13-1/2” 2-3/4” 9-1/2” 10-1/2” 2-3/4” 5-1/2” 13” 5-1/4”