RIVA COMBI MANUAL - REV B
17
The Riva is a mechanical draft, side wall vented boiler. There are two side wall flue options
available – separate and coaxial. The coaxial option has one configuration shown on the next
page. The separate option has two possible configurations shown on the following pages. There is
also a vertical roof venting option. Regardless of what vent kit is installed, they should all conform
to the
Provisions for combustion and ventilation air in accordance with section 5.3, Air for Combustion
and Ventilation, of the
National Fuel Gas Code, ANSI Z223.1
, or Sections 7.2, 7.3 or 7.4 of
CAN/CGA
B149, Installation Codes
, or applicable provisions of the local building codes.
If the Biasi Riva replaces a boiler that was attached to a common vent system, the common venting
system is likely to be too large for proper venting of the appliances remaining connected to it. To
ensure the remaining appliances will function properly, the test procedure below should be followed:
At the time of removal of an existing boiler, the following steps shall be followed with each
appliance remaining connected to the common venting system placed in operation, while the
other appliances remaining connected to the common venting system are not in operation.
A.
Seal any unused openings in the common venting system.
B.
Visually inspect the venting system for proper size and horizontal pitch and determine there
is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an
unsafe condition.
C.
insofar as is practical, close all building doors and windows and all doors between the space
in which the appliances remaining connected to the common venting system are located
and other spaces of the building. Turn on clothes dryers and any appliance not connected to
the common venting system. Turn on any exhaust fans, such as range hoods and bathroom
exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan.
Close fireplace dampers.
D.
Place in operation the appliance being inspected. Follow the lighting instructions. Adjust
thermostat so appliance will operate continuously.
E.
Test for spillage at the draft hood relief opening after 5 minutes of main burner operation.
Use the flame of a match or candle, or smoke from a cigarette, cigar or pipe.
F.
After it has been determined that each appliance remaining connected to the common
venting system properly vents when tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers and any other gas-burning appliance to their previous
condition of use.” (g) Any improper operation of the common venting system should be
corrected so the installation conforms with the
National Fuel Gas Code, ANSI Z223.1
and/or
CAN/CGA B149, Installation Codes
. When resizing any portion of the common venting
system, the common venting system should be resized to approach the minimum size as
determined using the appropriate tables in Part 11 of the
National Fuel Gas Code, ANSI
Z223.1
and/or
CAN/CGA B149, Installation Codes
.
9. Venting
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