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Installation
Instructions
(cont'd)
AWARNING
A gas water heater cannot operate properly without the cor-
rect amount of air for combustion. Do not install in a con-
fined area such a closet, unless you provide air as shown in
the "Locating
The New Water
Heater"
section. Never
obstruct the flow of ventilation air. If you have any doubts or
questions at all, call your gas company. Failure to provide the
proper amount of combustion air can result in a fire or explo-
sion and can cause DEATH, SERIOUS BODILY INJURY, OR
PROPERTY DAMAGE.
_,WARNING
If this water heater will be used in beauty shops, barber shops,
cleaning establishments, or self-service laundries with dry
cleaning equipment, it is imperative that the water heater or
water heaters be installed so that combustion and ventilation
air be taken from outside these areas. Refer to the "Locating
The New Water Heater" section of this manual and also the
latest edition of the National Fuel Gas Cede, ANSI Z223.1, also
referred to as NFPA 54 for specifics provided concerning air
required.
Combustion
Air and Ventilation
When
determining
the installation
location
for apower
vent
water heater, snow accumulation
and drifting
shouldbe
consid-
ered in areas where applicable.
VENTING
CLEARANCES
•
0" clearance for 3" PVC, ABS or CPVC Schedule 40 vent piping
from combustible surfaces.
•
12" m'n'mum
from the ground, 9" ceiling overhangs. Figure 2.
•
The Power Vent outlet terminal shall terminate at least 36" above
any forced air inlet located within 10 feet. Figure 3a.
•
The Power Vent outlet terminal shall terminate at least 9" below, 9"
horizontally from or 9" above any door, window or gravity air inlet
into the building. Figure 3a.
•
18" minimum
in all directions
from any obstruction
that may
interfere. Figure 3b.
•
18" minimum from other gravity or natural appliance outlet vents
when directly above or 135 ° to either side of center line. Figure 3c.
•
36" minimum from any outlet vents when directly below or 45 ° to
either side of center line. Figure 3c.
•
36" minimum in all directions from any other forced air appliance
outlet vent. Figure 3c.
•
The location selection must provide clearances for servicing and
proper operation of the water heater. Figure 4.
•
Vent termination must not be within 4 feet of any items such as gas
meters, gas valves or other gas regulating equipment.
•
The venting system must be installed in a manner which allows
inspection of the installation of the venting pipes and joints as well
as periodic
inspection
after installation
as required
by ANSI
Standards.
_,WARNING
Vent terminationmustnot be within4 feet of any items such as
gasmeters,gasvalves or other gasregulating equipment.
_,WARNING
]
Failureto haverequiredclearances betweenwater heater and
combustible materialwill resultin a fire hazard.
J
Figure
2 ]
" rain from
!::?ng
• LESSTHAN
120"
10
TERMINAL
12" rain.
AIR
INLET
Figure 3a I
VENT TERMINAL
I_
18" NIN.
IFigure3'i
18" TO WALL OR OTHER
OBSTRUCTIONS THAT
MAY INTERFERE WITH
VENTING•
s
VENT TERMINAL
CORNER OF BUILDING
POWER VENT TERMINAL
_
. _
-.. \
*THIS DIMENSION IS
iNCREASED TO 36" WHEN
......
_
_
THE VENT OUTLET IS FOR A
Z_
----
__
FORCED VENT APPLIANCE
:-
_ _'_.
_ _8"(:,':i=,:,o_.:,
'--_-
- DIRECT VENT OR
_S
_': _Z
_(
'3¥
GRAVITY VENTED
__
36';
_
_
_APPLIANCE
\
_-ANY
OTHER
OUTLET
VENT
Must maintain
adequate service
and
maintenance
_
accessibility.
• l'
i
_L_._
Range of degrees
]
available for vent
Figure
4
"
"
pipe installation.
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