Lochinvar EFFICIENCY PLUS, Руководство дизайнера

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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
5
CONTAMINANTS
Combustion air drawn from an interior or
exterior space
must be free of any chemical
fumes which could be corrosive to the boiler.
Burning chemical fumes results in the
formation of corrosive acids which attack
the boiler and cause improper combustion
and premature failure of the boiler and vent.
These fumes are often present in areas where
refrigerants, salts, and solvents are used.
Therefore, be aware of swimming pool
equipment, water softening, and cooling
system placement.
VENTING
General
Vent installations for connection to gas vents
or chimneys
must be in accordance with
Part 7, “Venting of Equipment”, of the latest
edition of the
National Fuel Gas Code, ANSI
Z223.1
, or applicable provisions of the local
building codes.
The connection from the appliance vent to the
stack
must be as direct as possible and
sized correctly, using the proper vent table.
The horizontal breeching of a vent must
have at least 1/4
”
rise per linear foot.
The horizontal portions should also be
supported for the design and weight of the
material employed to maintain clearances,
prevent physical damage and separation of
joints.
The connection from the appliance vent to the
stack or vent termination outside the building
must be made with listed Type “B” double
wall vent (or equivalent) for conventional vent
applications.
When utilizing direct vent capabilities
connections
must be made with AL29-4C
stainless steel (or equivalent) vent material.
Material should be sized according
to vent sizing tables (FAN column) in
the latest edition of the
National Fuel
Gas Code.
The vent materials and accessories, such as
firestop spacers, thimbles, caps, etc.,
must
be installed in accordance with the
manufacturer’s listing.
The vent connector and firestop shall provide
correct spacing to combustible surfaces and
seal to the vent connector on the upper and
lower sides of each floor or ceiling through
which the vent connector passes.
Any improper operation of the common
venting system in the existing building
must
be corrected when new equipment is
installed, so the installation conforms to the
latest edition of the
National Fuel Gas Code,
ANSI Z223.1.
CAUTION!
EXHAUST FANS:
Any fan or equipment
which exhausts air from
the equipment room may
deplete the combustion
air supply and/or cause
a down draft in the
venting system. If a fan
is used to supply
combustion air to
the equipment room, it
must be sized to make
sure that it does not
cause drafts which could
lead to nuisance
operational problems
with the boiler.