Aerco Esteem 399, Installation And Maintenance Instructions Manual

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Figure 13-4 Vertical vent/air installation with
sidewall combustion air inlet
13 - INSTALLATION - CATEGORY II: Vent and combustion air
Vent/Air vertical
installation with sidewall
combustion air inlet
The vent/air vertical with a sidewall
combustion air vent system
terminates the flue at the rooftop and
air inlet at the sidewall. The flue outlet
and combustion air intake terminate in
different pressure zones.
The termination point for the flue
products must follow the vertical vent
termination clearance requirements
on section 12.12. These units can be
identified by the Category II as noted
on the unit’s rating plate.
Follow all requirements in sections
5.1, 12.2 and 12.9. Follow all
requirements for venting flue products
to the outdoors with a vertical
termination as per section 12.12.
The vent/air vertical system requires
the installation of an additional pipe to
supply combustion air from outdoors
directly to the appliance. Follow all
requirements under the combustion
air inlet section 12.5.
EQUIPMENT
ROOM
Common venting
CATEGORY II:
Flues of multiple water heaters may
be combined by incorporating a vent
increaser to change the category IV
appliance to a category II vent system
which can be common vented using
an engineered vent system. The
increaser kit must be provided by
the manufacturer and the combined
engineered vent system must be
designed to ensure that flue products
will be properly exhausted from the
building at all times.
WARNING!!!
Failure to use
the correct vent increaser or
a properly sized vent system
may result in excessive levels
of carbon monoxide which can
cause severe personal injury or
death!
Consult a vent designer to determine
the diameter of the common vent
pipe required for combined vent
installation. It is recommended that
all vent joints and seams are sealed
gasthigt. This vent system has
specific vent material and installation
requirements. The negative draft in a
conventional vent installation must be
within the range of 0.02 to 0.08 inches
w.c. to ensure proper operation. Make
all draft readings while the unit is in
stable operation (approximately 10
minutes).
WARNING!!!
Improper
venting can result in excessive
levels of carbon monoxide
which can cause severe
personal injury or death!
1. INSTALL A CARBON MONOXIDE
DETECTOR. At the time of installation
of the common vented gas fueled
equipment, the installing plumber or
gasfitter shall observe that a hard wired
carbon monoxide detector with an alarm
and battery back-up is installed on the
floor level where the gas equipment
is to be installed. It shall be the
responsibility of the property owner to
secure the services of qualified licensed
professionals for the installation of hard
wired carbon monoxide detectors.
2. APPROVED CARBON MONOXIDE
DETECTORS. Each carbon monoxide
detector as required in accordance with
the above provisions shall comply with
NFPA 720 and be ANSI/UL 2034 listed
and IAS certified.