Locating The Heater; Clearances - A.O. Smith SERIES 100 Installation & Operating Instructions Manual

LOCATING THE 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 IF INSTALLED 18 INCHES (46 cm) OR MORE ABOVE THE
FLOOR. THIS MAY REDUCE THE RISK IF LOCATION IN SUCH AN AREA
CANNOT BE AVOIDED.
THE HEATER SHALL BE LOCATED OR PROTECTED SO IT IS NOT SUBJECT
TO PHYSICAL DAMAGE BY A MOVING VEHICLE.
DO NOT LOCATE THE HEATER WHERE NOISE FROM THE EXHAUST OR
INTAKE WILL BE OBJECTIONABLE. THIS INCLUDES LOCATIONS CLOSE TO
OR ACROSS FROM WINDOWS AND DOORS. AVOID ANCHORING THE VENT
AND INTAKE PIPES DIRECTLY TO FRAMED WALLS, FLOORS OF CEILINGS
UNLESS RUBBER ISOLATION PIPE HANGERS ARE USED. THIS PREVENTS
ANY VIBRATIONS FROM BEING TRANSMITTED INTO THE LIVING SPACES.
FLAMMABLE ITEMS, PRESSURIZED CONTAINERS OR ANY OTHER
POTENTIAL FIRE HAZARDOUS ARTICLES MUST NEVER BE PLACED ON
OR ADJACENT TO THE HEATER. OPEN CONTAINERS OF FLAMMABLE
MATERIAL SHOULD NOT BE STORED OR USED IN THE SAME ROOM WITH
THE HEATER.
When installing the heater, consideration must be given to proper location.
Location selected should be as close to the intake and exhaust termination
points as practicable, with adequate air supply and as centralized with the
piping system as possible.
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, it is recommended that a suitable
drain pan, adequately drained, be installed under the appliance.
Water heater life depends upon water quality, water pressure and the
environment in which the water heater is installed. Water heaters are
sometimes installed in locations where leakage may result in property
damage, even with the use of a drain pan piped to a drain. However,
unanticipated damage can be reduced or prevented by a leak detector or
water shut-off device used in conjunction with a piped drain pan. These
devices are available from some plumbing supply wholesalers and retailers,
and detect and react to leakage in various ways:
• Sensors mounted in the drain pan that trigger an alarm or turn off the
incoming water to the water heater when leakage is detected.
• Sensors mounted in the drain pan that turn off the water supply to the
entire home when water is detected in the drain pan.
• Water supply shut-off devices that activate based on the water pressure
differential between the cold water and hot water pipes connected to
the water heater.
• Devices that will turn off the gas supply to a gas water heater while at
the same time shutting off its water supply.
WARNING
WARNING
THIS WATER HEATER IS A CONDENSING UNIT AND REQUIRES A DRAIN
TO BE LOCATED IN CLOSE PROXIMITY TO ALLOW THE CONDENSATE
TO DRAIN SAFELY. THE CONDENSATE DRAINS FROM THE UNIT AT THE
EXHAUST ELBOW LOCATED AT THE BOTTOM OF THE UNIT. NOTE: IT IS
IMPORTANT THAT THE CONDENSATE HOSE NOT BE ELEVATED ABOVE
THE EXHAUST ELBOW (SEE FIGURE 3). THE CONDENSATE BUILD-UP
WILL BLOCK THE EXHAUST OUTLET, WHICH WILL CAUSE IMPROPER
OPERATION.
DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN UNDER WATER.
IMMEDIATELY CALL A QUALIFIED SERVICE TECHNICIAN TO INSPECT THE
APPLIANCE AND TO REPLACE ANY PART OF THE CONTROL SYSTEM AND
ANY GAS CONTROL WHICH HAS BEEN UNDER WATER.

CLEARANCES

These heaters are approved for installation on combustible flooring in an
alcove when the minimum clearances from any combustion construction
are followed as indicated in Figure 4.
In all installations the minimum combustible clearances from any vent piping
shall be 0". Vent piping passing through a combustible wall or ceiling must
be a continuous run (no joints).
A service clearance of 24" (61 cm) should be maintained from serviceable
parts such as relief valves, flue baffles, flue damper devices, thermostats,
cleanout openings or drain valves.
Always disconnect electrical power before servicing the unit.
*ILLUSTRATION OF MINIMUM COMBUSTIBLE CLEARANCES IN AN
ALCOVE.
5
WARNING
FIGURE 3.
WARNING
FIGURE 4.