Combustion Air; Venting - AquaStar 240 FX Installation And Owner's Manual

Combustion Air Supply
The water heater location must be provided with a
proper amount of combustion air. See the latest
edition of ANSI Standard Z223.1 and any local
codes that are applicable.
DO NOT INSTALL DIRECTLY ON CARPETING.
In general these requirements specify that if the unit
is installed in a confined space there must be
permanent air supply openings.
Minimum size of open space required for 240FX
Water heater Volume
size
165,000 8,250 Cubic
BTU
If the 240FX is installed in an area smaller than
indicated above, then the installer must make
special provisions for combustion air in the form of
two openings, one within 12" of the top and one
within 12" of the bottom of the space, each having a
total free area of 1 square inch per 1,000 BTUH of
rated input if the air is taken from inside the house.
This requirement reduces to 1 square inch per
4,000 BTUH if the air is taken from the outside.
See the National Fuel Gas Code for alternate
methods.
OUTSIDE AIR SUPPLY; when combustion air is
supplied directly through an outside wall, such as
intake louver openings into the dwelling. Each
opening should give a minimum free area of one
square inch per 4000 BTUH input of the total input
rating of all combustion appliances in the enclosed
area.
240FX
Area with an
8 Ft. ceiling
1,031
Ft. Square Ft.
Air Vents
(42 sq. in. each)
INSIDE AIR SUPPLY; when combustion air is
supplied from inside the building. Each opening of
the closet door should have a minimum free area of
one square inch per 1000 BTUH input of the total
input rating of all appliances in the enclosed area.
Air Vents
(165 sq. in. each)

VENTING

This water heater must be vented in accordance
with Venting of Equipment, of the latest edition of
the National Fuel Gas Code.
WARNING : Improper venting of this appliance can
result in excessive levels of Carbon Monoxide
which can result in severe personal injury or death.
Vent Connections
This water heater is listed for use with single wall
stainless (AL29-4C) and must maintain a 3"
clearance to combustibles. Use of a special gas
vent listed for Type II, III and IV is required.
Manufacturers include FasNSeal, Z -Flex and Heat-
Fab. Follow clearances and sealing methods
specified by those manufacturers. If local codes
supercede national codes (NFGC and IFGC), a
greater clearance to combustibles may be required.
Always check with
mechanical inspector before installing.
The vent system must be gas tight. All seams and
joints must be sealed with silicone sealant that has
a minimum temperature rating of 350º F, unless the
vent pipe is constructed with its own gasket. For
best results, horizontal and vertical vent systems
should be as short and straight as possible.
Double wall type B-vent is not permitted or
approved for venting this water heater.
Do not common vent the 240FX with any other
vented appliance.
8
240FX
your local plumbing or