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P/N 42-9470 11/07 Copyright 2007 Mestek, Inc.
Cast iron condensing boiler
Cast iron condensing boiler
— Installation and operation manual
Installation site preparation
Boiler location requirements
Do not install the boiler unless the location
meets all of the requirements in this box.
Failure to comply could result in severe personal
injury, death or substantial property damage.
Indoor installation only
Do not install the boiler outside or in an area that would ex-
pose the boiler or its gas or electrical components to rain or
dripping or spraying water.
Do not install the boiler in a location that would subject the
boiler to freezing. Where freeze protection is needed, follow
the guidelines in this manual.
Flooring
Th e boiler can be installed on combustible fl ooring, but
must not be installed on carpeting.
Th e fl oor must be structurally sound and capable of sup-
porting the weight of the boiler.
Th e boiler must be leveled front to back and side to side.
Use metal shims if necessary.
Accessibility
Jacket parts will have to be removed for some service proce-
dures. Ensure that the location provides a reasonable means
for service and operation of the boiler.
System piping, fuel and electrical supply
Th e boiler must be located such that piping for water, gas,
vent and air can reasonable be connected.
Th ere must be a reasonable means of providing electrical
supply to the boiler.
Adjacent construction
Locate the boiler in an area that will prevent water damage
to adjacent construction should a leak occur or during rou-
tine maintenance.
Combustion air
Do not place the boiler in a location that would restrict
the fl ow of combustion air into the air intake or subject the
boiler to a negative air pressure in the space when using air
from the boiler room.
Provide required combustion air openings to the boiler
room and the building (when required) when using air
from the boiler room for combustion (see page 8). If air is
piped to the boiler air intake connection, combustion air
openings are not required unless other appliances share the
same room.
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Buildings will require the installation of a fresh air duct or
other means of providing make-up air if the intake air op-
tion isn’t used. Any building utilizing other gas burning ap-
pliances, a fi replace, wood stove or any type of exhaust fan
must be checked for adequate combustion air when all of
these devices are in operation at one time. Sizing of an out-
side air duct must be done to meet the requirements of all
such devices.
Th e boiler must be supplied with combustion air in ac-
cordance with Section 5.3, “Air for Combustion and Ven-
tilation,” of the latest revision of the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 and all applicable local
building codes. Canadian installations must comply with
CSA B149.1 or .2 Installation Code for Gas Burning Appli-
ances and Equipment, or applicable provisions of the local
building codes.
Negative room pressure
Never operate the boiler in an environment subjected to a
negative pressure unless it is Direct Vented. Failure to com-
ply with this warning can result in excessive levels of carbon
monoxide.
Combustion air contamination
Combustion air contaminated with fl uorocarbons or other
halogenated compounds such as cleaning solvents and re-
frigerants will result in the formation of acids in the com-
bustion chamber. Th ese acids will cause premature failure
of the boiler.
Construction dust
: If the boiler is operated while the
building is under construction it must be protected from
wood, concrete, sheet rock and other types of dust. Failure
to properly protect the boiler from construction dust will
damage the boiler.
If the boiler has been operated with contaminated air, it
must be thoroughly inspected. Where possible, boiler com-
ponents must be cleaned, following instructions provided
in this manual and/or supplementary instructions from
Mestek. Where cleaning is not possible, the boiler may have
to be replaced.
Never store combustible materials, gasoline or any product
containing fl ammable vapors or liquids in the vicinity of the
boiler.
Clearances
All installation must provide the minimum clearances to
combustible materials given on page 7.
Th e installation should provide the minimum service clear-
ances given on page 7 when possible. If these clearances
cannot be met, then:
Ensure that boiler components can be accessed for
operation/start-up/maintenance as required in the
200i
manuals.
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