Weil-McLain CGi Series 3 Installation And Maintenance Manual page 8

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GAS-FIRED wATER BOILER- sERIEs a -
Boiler Manual
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WARNING!
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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.
Direct exhaust venting (Category Ill) - DO NOT COMMON vent the CGi in a direct exhaust system (Cite gory
Ill). COJmecting more than one appliance to a direct exhaust system will cause flue gas spillage or appliance
malfunction, resulting in possible severe personal injury, death or substantial property damage.
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 con-
nected 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 commo n venting
system.
b. VIsually Inspect the venting system for proper size
and horizontal pitch and determine there is no blockage
or restriction, leakage, corrosion or other deficiencies
which could cause an unsafe condition.
c. Test vent system - Insofar as
is
(>T actical, dose all
building doors and windows and all doors between
the space in which the appliances remaining connected
to the commo n 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 o n any exhaust
funs,
such as range hoods and
bathroom exhausts, so they will operate at maximum
speed. Do not operate a stmmter exhaust fun. Close
fireplace dampers.
d. Place In operation the appliance being inspected.
Follow the operating instructions. Adjust them1ostat
so appliance will operate continuously.
e. Test for spillage at draft hood 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 o utlined above, return
doors, windows, exhaust funs, fireplace dampers, and
any other gas-burning appliance to their previous con-
ditions of use.
Any improper operation of common venting system should
be corrected so the installation confomts 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 I I of that code.
Ca-
nadian installations must comply with BI49. 1 or BI49.2
Installation Code.
Chimney or vent
requirements
1.
Venting must
be
installed according to Part
7,
Venting of Equipment, of National FUel Gas
Code, ANSI Z223. 1 - latest edition and ap-
plicable building codes. Canadian installations
must comply with BI49.1 or BI49.2 Installation
Codes.
2. See Ratings table on page 66 for minintwn chim-
ney or vent sizes. A chimney o r vent without
a
listed cap should extend at least 3 feet above
the highest point where it passes through a roof
of a building and at least 2
teet
higher than
any portion of
a
building within a horizontal
distance of 10
teet.
A chimney o r vent must not
extend less than the distances stated above.
3. A lined chimney is preferred and m ust
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 Jinings made of non-
corrosive materials are best.Advice for flue con-
nections and chimney linings
can
be obtained
fro m 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 o ne 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
exists for condensation to occur. Condensation
can dam age a masonry chimney. Weil-Mclain
recommends the following to prevent possible
damage.
a. Line chimney with corrosion-resistant
metal liner such as AL29-4CS single-wall
stainless steel orB-vent. Size liner per
National Fuel Gas Code ANSI Z223.1 -
latest edition.
b. Provide drain trap to remove any conden-
sate.
Part Number 550-142-780/0712