Lochinvar EFFICIENCY PLUS, Руководство дизайнера

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Masonry Chimney
A masonry chimney
must
be properly sized
for the installation of a high efficiency gas fired
appliance. Venting of a high efficiency
appliance into a cold or oversized masonry
chimney can result in operational and safety
problems.
Exterior masonry chimneys, with one or more
sides exposed to cold outdoor temperatures, are
more likely to have venting problems. For this
reason, exterior masonry chimneys are not
generally recommended to vent high efficiency
gas appliances.
An interior masonry chimney, which is not
exposed to the outdoors below the roofline, may
be used to vent high efficiency gas appliances
based on the results of careful inspection,
proper sizing and local code approval. If there
is any doubt about the sizing or condition of a
masonry chimney, it
should be relined with a
properly sized and approved chimney liner
system.
An interior masonry chimney
should be carefully
inspected to determine its suitability for the
venting of flue products.
A clay tile lined chimney must be structurally
sound, straight and free of misaligned tile, gaps
between liner sections, missing sections of liner
or any signs of condensate drainage at the
breeching or clean out.
If there is any doubt about the condition of a
masonry chimney, it
should be relined.
Metallic liner systems (Type “B” double-wall,
flexible, or rigid metallic liners) are
recommended to line or reline an existing
masonry chimney. Consult with local code
officials to determine code requirements or the
advisability of using a lined masonry chimney
or relining of a masonry chimney.
VENTING OPTIONS
Conventional Venting - Negative Draft
Size vent material according to the “FAN”
column of vent sizing tables in the latest edition
of the
National Fuel Gas Code. “FAN” applies
to Category I fan assisted combustion
appliances with natural draft. Utilize Category
I type “B” vent material for
all
conventional
venting applications.
A bell increaser is provided and installed
directly on the boiler vent outlet. The bell
increases the boiler vent size by 1 inch
(25.4mm) in diameter. The vent connection
is made directly to the bell increaser on the
top of the unit. No additional draft diverter
or barometric damper is required.
(TABLE B)
CONVENTIONAL VENTING, VENT CONNECTION SIZE
CONVENTIONAL
MODEL VENT FLUE SIZE
EB150 5
”
EB200 5
”
EB250 6
”
EB300 6”
L o c h i n v a r
D E S I G N E R
’
S G U I D E E F F I C I E N C Y
+
B O I L E R
6 1 5 - 8 8 9 - 8 9 0 0
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