Installation Considerations; Rough-In Dimensions; Locating The Water Heater - A.O. Smith 100 Series Instruction Manual

ROUGH-IN DIMENSIONS

Model Number Tank Capacity in Gallons (Liters)
52
80
120

LOCATING THE WATER HEATER

CAUTION
Property Damage Hazard
•
All water heaters eventually leak.
•
Do not install without adequate drainage.
Carefully choose a location for the new water heater. The
placement is a very important consideration for the safety of the
occupants in the building and for the most economical use of the
appliance.
Whether replacing an old water heater or putting the water heater in
a new location, the following critical points must be observed. The
water heater must be located:
1. On a level surface. The Qualified Installer may shim the channel
type skid base as necessary if levelling is required.

INSTALLATION CONSIDERATIONS

INSTALLATION CONSIDERATIONS
Figure 4. Dimensions and Components
Table 2. Tank Capacities and Dimensions
A - Inches (mm)
50 (189.3) 55 3/4 (1416)
80 (302.8) 60 1/4 (1350)
119 (450.5) 62 1/4 (1581)
B - Inches (mm)
21 3/4 (552)
25 1/2 (648)
29 1/2 (749)
2. Near a floor drain. The heater should be located in an area where
leakage of the tank or connections will not result in damage to
the area adjacent to the heater or to lower floors of the structure.
3. Close to the point of major hot water usage and the power supply.
Hot water piping and branch circuit wiring should be as short as
possible.
Insulate hot and cold water piping where heat loss and condensation
may be a problem.
Heater construction permits installation, maintenance, and service
work to be performed through the front control panel.
Suggested clearances from adjacent surfaces are 12" (30 cm) on
top, 30" (76 cm) in front for access to the unit.
The heater may be installed on or against combustible surfaces. The
left side and back may be placed flush against adjacent surfaces.
The temperature of the space in which the water heater is installed
must not go below 32°F (0°C) or above 122°F (50°C).
11
C - Inches (mm) Inlet/Outlet
27 (685) 1 1/4
31 (787) 1 1/4
35 (889) 1 1/4