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CGi-4E Gas-Fired Water Boiler — Boiler Manual
8
Part Number 550-110-711/1108
Prepare boiler location — vent system
1c
Failure to follow all instructions can result in flue gas spillage and carbon monoxide emissions, 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 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 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 or other deficiencies
which could cause an unsafe condition.
c.
Test vent system — 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.Donotoperateasummerexhaustfan.Close
fireplace dampers.
d.
Place in operation the appliance being inspected.
Follow the lighting/operating instructions. Adjust
thermostat 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 outlined above, return
doors, windows, exhaust fans, fireplace dampers, and
any other gas-burning appliance to their previous con-
ditions of use.
Any improper operation of common venting system should
becorrectedsotheinstallationconformswiththeNational
FuelGasCode,ANSIZ223.1-latestedition.Correctbyre-
sizing to approach the minimum size as determined using
theappropriatetablesinPart11ofthatcode.Canadian
installationsmustcomplywithB149.1orB149.2Instal-
lationCode.
Chimney or vent require-
ments
1. VentingmustbeinstalledaccordingtoPart7,
VentingofEquipment,of NationalFuelGas
Code,ANSIZ223.1-latesteditionandappli-
cable buildingcodes. Canadianinstallations
mustcomplywithB149.1orB149.2Installation
Codes.
2. SeeRatingstableonpage67forminimumchim-
ney or vent sizes. A chimney or 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 feet higher than
any portion of a building within a horizontal
distance of 10 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 liningswith joints that prevent
retention of moisture and linings made of non-
corrosive materials are best. Advice for flue con-
nections 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. Coldmasonrychimneys,alsoknownasoutside
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
potentialexistsforcondensationtooccur.Con-
densation can damage a masonry chimney. Weil-
McLain recommends the following to prevent
possible damage.
a. Line chimney with corrosion-resistant
metallinersuchasAL29-4C®single-wall
stainlesssteelorB-vent.SizelinerperNa-
tionalFuelGasCodeANSIZ223.1-latest
edition.
b. Provide drain trap to remove any conden-
sate.
DO NOT COMMON VENT—DonotinstalltheCGi-4Eintoacommonventwithanyotherappliance.This
will cause flue gas spillage or appliance malfunction, resulting in possible severe personal injury, death or substantial
property damage.
Inspect existing chimney before installing boiler. Failure to clean or replace perforated pipe or tile lining will cause
severe personal injury or death.