John Wood Direct Vent - Manuel (Page 20)

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VENTING
This direct vent water heater uses a sealed venting
system to supply fresh combustion air to the heater and
to exhaust the products of combustion (fl ue gases) to the
outdoors. The venting is a “pipe in a pipe” system. The
inner (3”) piping carries out the exhaust fl ue gases while
the outer (6”) piping carries in fresh combustion air. The
corrugated end of the vent piping connects to the top of
the water heater and the opposite end connects to the vent
termination hood which will be mounted on the exterior wall
(see Figure 15). Figure 15 shows the hot exhaust gas exit
and the location of the combustion air intake.
Figure 18 thru Figure 25 show how to assemble and
connect the venting system.
Figure 27 thru Figure 29 show various installation options.
DO NOT STORE OR USE GASOLINE OR OTHER
FLAMMABLE VAPOURS AND LIQUIDS IN THE VICINITY
OF THE VENT TERMINATION HOOD.
NEVER OPERATE THE WATER HEATER UNLESS IT IS
VENTED TO THE OUTDOORS AND HAS ADEQUATE AIR
SUPPLY TO AVOID RISKS OF IMPROPER OPERATION,
FIRE, EXPLOSION OR ASPHYXIATION.
DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND
VENTILATING AIR. ADEQUATE AIR FOR COMBUSTION
AND VENTILATION MUST BE PROVIDED FOR SAFE
OPERATION.
Figure 14
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
• Install vent system In accordance with codes.
• Do not operate water heater if flood damaged.
• Install water heater in accordance with the
instruction manual.
• Do not operate if soot buildup is present.
• Do not obstruct water heater air intake.
• Do not place chemical vapor emitting products near
water heater or vent terminal hood.
• Gas and carbon monoxide detectors are available.
• Never operate the heater unless it is vented to the
outdoors and has adequate air supply to avoid risks
of improper operation, fire, explosion or asphyxia-
tion.
• Analyze the entire vent system to make sure that
condensate will not become trapped in a section of
vent pipe and therefore reduce the open cross
sectional area of the vent.
• Chemical corrosion of flue and vent system can
cause serious injury or death.
Breathing Hazard - Carbon Monoxide Gas
WARNING
VENT TERMINAL CLEARANCES
The vent system must terminate so that proper clearances
are maintained as cited in local codes or the current edition
of the “Natural Gas and Propane Installation Code”
B149.1 as follows: