Aerco Esteem 399, Installation And Maintenance Instructions Manual

Page: 51 / 136

51
12 - INSTALLATION - CATEGORY IV: Vent and combustion air
12.5 - Air inlet pipe
materials:
WARNING!!!
The air
inlet pipe(s) must be sealed.
Improper sealed can result
in excessive levels of carbon
monoxide which can result
in severe personal injury or
death!
Choose acceptable combustion air
inlet pipe materials from the following
list:
- PVC, CPVC or ABS
- AL29-4C, stainless steel material
to be sealed to specification of its
manufacturer.
- Polypropylene material to be sealed
to specification of its manufacturer.
WARNING!!!
Using air
intake materials other than
those specified, mixing the
specified materials, failure to
properly seal all seams and
joints or failure to follow the
manufacturer’s instructions
can result in flue gas
recirculation, spillage of flue
products and carbon monoxide
emissions causing severe
personal injury or death.
NOTICE! Polypropylene and stainless
steel pipe may require an adapter (not
provided) to transition between the air
inlet connection on the appliance and
the air inlet pipe.
NOTICE! The use of insulated
material for the combustion air
inlet pipe is recommended in cold
climates to prevent the condensation
of airborne moisture in the incoming
combustion air.
NOTICE! Combustion air piping must
be supported per guidelines listed
in the “National Mechanical code”,
section 305, table 305.4 or local
codes dictate.
12.5.1 - Sealing of PVC,
CPVC or ABS air inlet
pipe
The PVC, CPVC, or ABS air inlet pipe
should be cleaned and sealed with the
pipe manufacturer’s recommended
solvents and standard commercial
pipe cement for the material used.
The PVC, CPVC or ABS air inlet pipe
should use a silicone sealant VITON-
BASED RTV, to ensure a proper seal
at the appliance connection and the
air inlet cap connection. ABS should
use a screw type clamp to seal
the pipe to the air inlet cap. Proper
sealing of the air inlet pipe ensures
that combustion air will be free of
contaminants and supplied in proper
volume.
When a sidewall or vertical rooftop
combustion air supply system is
disconnected for any reason, the air
inlet pipe must be resealed to ensure
that combustion air will be free of
contaminants and supplied in proper
volume.
WARNING!!!
Failure to
properly seal all joints and
seams as required in the air
inlet piping may result in flue
gas recirculation, spillage
of flue products and carbon
monoxide emissions causing
severe personal injury or
death.
WARNING!!!
All air intake
pipes must be glued, properly
supported and pitched a
minimum of a 1/4 inch per
foot out to the heater (to allow
drainage of water into the
appliance). Failure to follow
this warning could result in
excessive levels of carbon
monoxide or a fire, which can
result in severe personal injury
or death!