Installation Instructions; Uncrating; Locating The Heater; Levelling - A.O. Smith BTR120 Installation Operation & Maintenance

The National Sanitation Foundation also recommends circulation
of 180°F (82°C) water. Where this is done, the circulation should
be very gentle so that it does not cause any unnecessary
turbulence inside the water heater. The circulation should be just
enough to provide 180°F (82°C) water at the point of take-off to
the dishwashing machine. Adjust flow by means of the plug cock
in the circulating line.

INSTALLATION INSTRUCTIONS

REQUIRED ABILITY
INSTALLATION OR SERVICE OF THIS WATER HEATER
REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED
TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR
SUPPLY, VENTING, GAS SUPPLY AND ELECTRICAL WORK
ARE REQUIRED.
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT
IN SERIOUS PERSONAL INJURY OR DEATH.

UNCRATING

The heater is shipped with the flue damper already installed. The
wiring conduit runs from the thermostat to the damper drive cover.
Before turning unit on, check to make sure the wiring conduit is
securely plugged into damper drive.

LOCATING THE HEATER

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.
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 PILOT OR MAIN BURNER FLAMES
CAUSING FIRE OR EXPLOSION. SOME LOCAL CODES
PERMIT OPERATION OF GAS APPLIANCES IN SUCH AREAS
IF THEY ARE INSTALLED 18" (.50 m). 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.
the water heater must be placed on a metal or wood panel
extending beyond the full width and depth by at least 3 inches
(7.6 cm) in any direction. If the heater is installed in a carpeted
alcove, the entire floor shall be covered by the panel. Also, see
the DRAIN REQUIREMENTS.
THE HEATER SHALL BE LOCATED OR PROTECTED SO IT IS
NOT SUBJECT TO PHYSICAL DAMAGE BY A MOVING VEHICLE.
FLAMMABLE ITEMS, PRESSURIZED CONTAINERS OR ANY
OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUST
WARNING
WARNING
WARNING
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 THE
HEATER OR CONNECTIONS WILL NOT RESULT IN DAMAGE
TO THE ADJACENT AREA OR TO LOWER FLOORS OF THE
STRUCTURE.
WHEN SUCH LOCATIONS CANNOT BE AVOIDED, A SUITABLE
DRAIN PAN SHOULD BE INSTALLED UNDER THE HEATER.
Such pans should be fabricated with sides at least 2" (5 cm) deep,
with length and width at least 2" (5 cm) greater than the diameter
of the heater and must be piped to an adequate drain. The pan
must not restrict combustion air flow.
For appliance installation locations with elevations above 2000
feet (610 m), refer to HIGH ALTITUDE INSTALLATIONS section
of this manual for input reduction procedure.
If the unit is not level, insert the bolts which were used in crating
into the legs to correct this condition.
These heaters are approved for installation on combustible
flooring in an alcove when the minimum clearance from any
combustion construction are followed as indicated in figure 6
and Table 2.
The following units are approved for installation with side, rear
and ceiling clearances as indicated below:
A
(RIGHT SIDE) (LEFT SIDE)
120 1" (2.54 cm)
154 1" (2.54 cm)
*180 1" (2.54 cm)
*197 1" (2.54 cm)
198 1" (2.54 cm)
*199 1" (2.54 cm)
200 1" (2.54 cm)
250 2" (5.08 cm)
251 2" (5.08 cm)
275 2" (5.08 cm)
305 2" (5.08 cm)
Instead **365 3" (7.75 cm)
400 3" (7.75 cm)
* The BTRC version has a 2" (5.08cm) to sides and rear.
** The BTRC version has a 4" (10.16cm) to sides and rear.
In all installations the minimum combustible clearances from any
draft hood surface or vent piping shall be 6" (16cm). Vent piping
passing through a combustible wall or ceiling must be a continuous
run (no joints) and retain the 6" (16cm) clearance unless an
approved reducing thimble is used.
8
LEVELING

CLEARANCES

B C
(BACK)
1" (2.54 cm) 1" (2.54 cm) 12" (30.48 cm)
1" (2.54 cm) 1" (2.54 cm) 12" (30.48 cm)
1" (2.54 cm) 1" (2.54 cm) 12" (30.48 cm)
1" (2.54 cm) 1" (2.54 cm) 12" (30.48 cm)
1" (2.54 cm) 1" (2.54 cm) 12" (30.48 cm)
1" (2.54 cm) 1" (2.54 cm) 12" (30.48 cm)
1" (2.54 cm) 1" (2.54 cm) 12" (30.48 cm)
2" (5.08 cm) 2" (5.08 cm) 12" (30.48 cm)
2" (5.08 cm) 2" (5.08 cm) 12" (30.48 cm)
2" (5.08 cm) 2" (5.08 cm) 12" (30.48 cm)
2" (5.08 cm) 2" (5.08 cm) 12" (30.48 cm)
3" (7.75 cm) 3" (7.75 cm) 12" (30.48 cm)
3" (7.75 cm) 3" (7.75 cm) 12" (30.48 cm)
TABLE 2
D
(CEILING)