Prepare Boiler - Weil-McLain CGA 2 Series Installation And Maintenance Manual

COa Series 2 Gas-Fired Water Boiler - Boiler Manual
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IAWARNINGI
8
Prepare boiler location - vent system
Failure to follow all instructions can result in flue gas spillage and carbon monoxide emissions, causing severe
personal injury or death.
Inspect existing chimney before installing boiler. Failure to clean or replace perforated pipe or tile lining will cause
severe personal injury or death.
Do not alter boiler draft hood or place any obstruction or non-approved vent damper in breeching or vent system.
CSA certification will become void. Flue gas spillage and carbon monoxide emissions will occur causing severe
personal injury or death.
When removing boiler from an
existing common vent system:
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 op-
eration, 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 Ins pect the venting system for proper
siu and ho•·izonral pitch and determine there is no
blockage or restriction, leakage, corrosion or other
deficiencies which could cause an unsafe condition.
c. Test vent s ystem- Insofar as is practical, close all
building doors and windows and all doors between
the space in wh ich the appliances remaining con-
nected to the common venting system are located
and other spaces of the building. Turn on clothes
dryers and any appliance not connected to the com-
mon 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 sum-
mer exhaust fan. Close fireplace dampers.
d. Place In operation the appliance being inspected.
Follow the operating instructions. Adjust thermostat
so appliance will operate continuously.
e. Tes t lor s pillage at draft h ood relief opening after
5 minutes of main burner operation. Use the flame
of a match or candle.
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 previ-
ous conditions of use.
Any improper operation of common venting system
should
be
corrected so the installation conforms with
the National Fuel Gas Code, ANSI Z223.1-latest edition.
Correct by resizing to approach the minimum size as
determined using the appropriate tables in Part II of
that code. Canadian installations must comply with
Bl49.1 or Bl49.2 Installation Code.
Chimney or vent require-
ments
I.
Venting must
be
installed according to Part 7, Vent-
ing of Equipment, ofNational Fuel Gas Code, ANSI
Z223.1-latest edition and applicable building codes.
Canadian installations must comply with Bl49.1 or
Bl49.2 Installation Codes.
2. See Ratings table on page 665 for minimum chimney
or vent sizes. A chimney or vent without a lis ted
cap should extend at least 31eet above the highes t
point where it passes through a roof of a building
and at leas t 2 feet higher than any portion ol a
building within a horizontal dis tance 0110 feet.
A chimney or vent must not extend less than the
distances stated above.
3. A lined chimney
is preferred and
must
be
used when
required by local, state, provincial and national
codes, laws, regulations and ordinances. Vitreous tile
linings with joints that prevent retention of moisture
and linings made of noncorrosive materials are
best.
Advice for flue connections and chimney linings can
be
obtained from local gas utility. Type B double-
wall metal vent pipe or single-wall vent pipe may
be
used as a liner.
4. Cold masonry chimneys, also known as outside
chimneys, typically have one or more walls ex-
posed to outside air. When any atmospheric gas-
fired boiler with automatic vent damper is vented
through this type of chimney, the potential e:<ists for
condensation to occur. Condensation can damage
a masonry chimney. Weil-Mclain recommends the
following to prevent possible damage.
a. Line chimney with corrosion-resistant metal
liner such as AL29-4C® single-wall s tainless
steel orB-vent. Size liner per National Fuel
Gas Code ANSI Z223.1 -latest edition.
b. Provide drain trap to remove any condensate.
5. Where rwo or more gas appliances vent into a
common chimney or vent, equivalent area should
be
at leas t equal to area of vent outlet on largest
appliance plus 50 percent of vent outlet area on
additional appliance.
Part Number 550-142-779/0712