Installation Considerations; Rough In Dimensions - A.O. Smith BTH-120 Instruction Manual

rough in dimensions

FRONT
CLEANOUT
A
These designs comply with the current edition of the American National Standard for Gas Water Heaters, Volume III, ANSI Z21.10.3 / CSA 4.3
as an automatic circulating tank water heater, and automatic storage water heaters.
120,000 & 150,000
Btu/hr
MODELS
68°
*1 1/2" NPT
WATER
OUTLET
45°
* Center line of water outlet on top of the water heaters is approximately 7 inches from the front edge of the water heater.
moDEl
a
INCHES/Cm
bTH 120
3/7.62
bTH 150
3/7.62
bTH 199
3/7.62
bTH 250
3/7.62

installation considerations

T & P VALVE
B
D
3/4" NPT DRAIN
1 1/2" NPT
WATER INLET
C
35°
22°
FRONT
18°
45°
b C
INCHES/Cm INCHES/Cm INCHES/Cm
27.75/70.5 6.3/16
27.75/70.5 6.3/16 55.5/141
27.75/70.5 6.3/16 55.5/141
27.75/70.5 6.3/16 55.5/141
SUPPLY GAS
CONNECTION
E
F
G
TOP VIEWS
SUPPLY GAS
CONNECTION
VERTICAL
*1 1/2" NPT
WATER
OUTLET
45°
DImENsIoNs
D E F
INCHES/Cm INCHES/Cm
35/88.9 55.5/141 48/121.9
75.5/191.8 68.5/174
75.5/191.8 75.5/191.8
75.5/191.8 75.5/191.8
figure 6
11
INTAKE AIR CONNECTION
WATER OUTLET
HEIGHT
BACK
H
VENT CONNECTION
3 INCH PVC
(exhaust elbow)
CONDENSATE
DRAIN CONNECTION
1/2 INCH PVC
35°
199,000 & 250,000
64°
MODELS
FRONT
18°
45°
G H I
INCHES/Cm INCHES/Cm INCHES/Cm
11/27.9 42/106.7 47.5/120.6
11/27.9 63/160 69/175.3
11/27.9 63/160 69/175.3
11/27.9 63/160 69/175.3
3 INCH PVC
I
Btu/hr
sHIP sHIP
WEIGHT WEIGHT
sTD asmE
LBS/KG LBS/KG
460/208 490/222
555/252 595/270
555/252 595/270
555/252 595/270