Install Instructions
Part Number 550-142-902/1016
CGi
GAS-FIRED WATER BOILER — SERIES 3 — Boiler Manual
8
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:
Atthetimeofremovalofanexistingboiler,thefollowing
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.Donot operate a summer exhaustfan.Close
fireplace dampers.
d.
Place in operation the appliance being inspected.
Followtheoperatinginstructions.Adjustthermostat
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.
Anyimproperoperationofcommonventingsystemshould
becorrectedsotheinstallationconformswiththeNational
Fuel Gas Code,ANSI Z223.1/NFPA 54 – latest edition.
Correctbyresizingtoapproachtheminimumsizeasdeter-
mined using the appropriate tables in Part 13 of that code.
CanadianinstallationsmustcomplywithB149.1orB149.2
NaturalGasandPropaneInstallationCode.
Chimney or vent
requirements
1. VentingmustbeinstalledaccordingtoPart7,
Ventingof Equipment, of National Fuel Gas
Code,ANSIZ223.1/NFPA54–latesteditionand
applicablebuildingcodes.Canadianinstallations
mustcomplywithB149.1orB149.2NaturalGas
andPropaneInstallationCode.
2. SeeRatingstableonpage66forminimumchim-
neyorventsizes.Achimneyorvent
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
.Achimneyorventmustnot
extend less than the distances stated above.
3. Alinedchimneyispreferredandmustbeused
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 non-
corrosivematerialsarebest.Adviceforuecon-
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 potential
existsforcondensationtooccur.Condensation
candamageamasonrychimney.Weil‑McLain
recommends the following to prevent possible
damage.
a. Linechimneywithcorrosion‑resistant
metallinersuchasAL29‑4C®single‑wall
stainlesssteelorB‑vent.Sizelinerp e r Na -
tionalFuelGasCodeANSIZ223.1/NFPA
54 –latestedition.
b. Provide drain trap to remove any conden-
sate.
Direct exhaust venting (Category III) — DO NOT COMMON venttheCGiinadirectexhaustsystem(Category
III).Connectingmorethanoneappliancetoadirectexhaustsystemwill cause ue gasspillageorappliance
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.