Locating The Water Heater; Clearances - AO Smith BTR120 Manuel D'instructions

LOCATING THE WATER HEATER

CAUTION
Property Damage Hazard
•
All water heaters eventually leak.
•
Do not install without adequate drainage.
When installing the heater, consideration must be given to proper
location. Location selected should be as close to the stack or chimney
as practicable, with adequate air supply and as centralized with the
piping system as possible.
Fire or Explosion Hazard
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Avoid all ignition sources if you smell gas.
Do not expose water heater controls to excessive gas
pressure.
Use only the gas shown on the water heater rating label.
Maintain required clearances to combustibles.
Keep ignition sources away from faucets after extended
periods of non-use.
Read instruction manual before
installing, using or servicing
water heater.
There is a risk in using fuel burning appliances such as gas water
heaters in rooms, garages or other areas where gasoline, other
flammable liquids or engine driven equipment or vehicles are stored,
operated or repaired. Flammable vapors are heavy and travel along
the floor and may be ignited by the heater's igniter or main burner
flames causing fire or explosion. Some local codes permit operation
of gas appliances in such areas if they are installed 18" or more
above the floor. This may reduce the risk if location in such an area
cannot be avoided.
Do not install this water heater directly on a carpeted floor. A fire
hazard may result. Instead the water heater must be placed on a
metal or wood panel extending beyond the full width and depth by at
least 3 inches in any direction. If the heater is installed in a carpeted
alcove, the entire floor shall be covered by the panel. Also, see the
DRAINING requirements in MAINTENANCE Section.
The heater shall be located or protected so it is not subject to physical
damage by a moving vehicle.
INSTALLATION CONSIDERATIONS
Flammable items, pressurized containers or any other potential
fire hazardous articles must never be placed on or adjacent to
the heater. Open containers or flammable material should not be
stored or used in the same room with the heater.
The heater must not be located in an area where it will be subject
to freezing.
Locate it near a floor drain. The heater should be located in an
area where leakage from heater or connections will not result
in damage to adjacent area or to lower floors of the structure.
When such locations cannot be avoided, a suitable metal drain
pan should be installed under heater. Such pans should be
fabricated with sides at least 2" deep, with length and width at
least 2" greater than diameter of heater and must be piped to
an adequate drain. Pan must not restrict combustion air flow.

CLEARANCES

These heaters are approved for installation on combustible flooring
in an alcove when the minimum clearance from combustion or
non-combustible construction are followed as indicated in Figure 6
and Table 5.
In all installations the minimum combustible clearances from draft
hood surface or vent piping shall be 6" (152mm). Vent piping passing
through a combustible wall or ceiling must be a continuous run
(no joints) and retain 6" (152mm) clearance unless an approved
reducing thimble is used.
A service clearance of 24" (610mm) should be maintained from
serviceable parts, such as relief valves, baffles, thermostats, cleanout
openings or drain valves.
TABLE 5. INSTALLATION CLEARANCES
A
(RIGHT SIDE) (LEFTSIDE)
120 1" (2.54 cm) 1" (2.54 cm)
154
1" (2.54 cm) 1" (2.54 cm)
*180 1" (2.54 cm) 1" (2.54 cm)
*197 1" (2.54 cm) 1" (2. 54 cm)
198 1" (2.54 cm) 1" (2. 54 cm)
*199
1" (2. 54 cm) 1" (2. 54 cm)
200 1" (2. 54 cm) 1" (2. 54 cm)
250
2" (5.08 cm) 2" (5.08 cm)
251 2" (5.08 cm) 2" (5.08 cm)
275 2" (5.08 cm) 2" (5.08 cm)
305 2" (5.08 cm) 2" (5.08 cm)
**365 3" (7.75 cm) 3" (7.75 cm)
400 3" (7.75 cm) 3" (7.75 cm)
* The BTRC version has a 2" (5.08cm) to sides and rear clearance.
** The BTRC version has a 4" (10.16cm) to sides and rear clearance.
10
B C
(BACK) (CEILING)
1" (2.54 cm) 12" (30.48 cm)
1" (2.54 cm) 12" (30.48 cm)
1" (2.54 cm) 12" (30.48 cm)
1" (2.54 cm) 12" (30.48 cm)
1" (2.54 cm) 12" (30.48 cm)
1" (2. 54 cm) 12" (30.48 cm)
1" (2. 54 cm) 12" (30.48 cm)
2" (5.08 cm) 12" (30.48 cm)
2" (5.08 cm) 12" (30.48 cm)
2" (5.08 cm) 12" (30.48 cm)
2" (5.08 cm) 12" (30.48 cm)
3" (7.75 cm) 12" (30.48 cm)
3" (7.75 cm) 12" (30.48 cm)
D