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3
1
KEY TO SYMBOLS
This
9
is the safet
y−alert symbol. When you see this symbol on
the appliance and in instructions or manuals, be alert to the potential
for personal injury.
Understand the signal words
DANGER
,
WARNING
, and
CAUTION
.
These words are used with the safety−alert symbol.
DANGER
identifies the most serious hazards which
will
result in
severe personal injury or death.
WARNING
signifies a hazard which
could
result in personal injury
or death.
CAUTION
is used to identify hazards which
may
result in minor
personal injury or product and property damage.
NOTE
and
NOTICE
are used to highlight suggestions which will
result in enhanced installation, reliability, or operation.
2
WARNINGS
2 .1
Ratings and Certifications
− Gas fired hot water boiler for either direct
vent installation. Design
according to: ANSI Z21.13-2017 ● CSA 4.9-2017 – Gas-Fired low
pressure hot water boilers. Direct vent boiler, Category IV.
− SCAQMD Rule 1146.2
9
WARNING
: Altering any pressure vessel by installing replacement
heat exchangers, or any ASME parts not manufactured and/or
approved by the manufacturer will instantly void the ASME and
CSA ratings and any warranty on the vessel. Altering the ASME or
CSA ratings of the vessel also violates national,
state, and local
approval codes.
Combi models are certified to NSF/ANSI 372-2016 - Low lead
content certification program - plumbing products and conform to the
requirements for “lead free” plumbing products.
2 .2
Regulations and guidelines
The installation must conform to the requirements of the authority
having jurisdiction or, in the absence of such requirements, to the
latest edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54.
In Canada, installation must be in accordance with the requirements of
CAN/CSA B149.1, Natural Gas and Propane Installation Code. Where
required by the authority having jurisdiction, the installation must conform
to the Standard for Controls and Safety Devices for Automatically Fired
Boilers, ANSI/ASME CSD-1.
Install CO detectors per local regulations. The use of a carbon monoxide
detector in conjunction with the manufacturer heating products is
required. When installing a carbon monoxide detector, the manufacturer’s
instructions of the carbon monoxide detector must be followed in their
entirety. It is recomm
ended to use a carbon monoxide detector in compliance
with a nationally recognized standard such as ANSI/UL 2034-2002 in the United
States and CSA 6.19-01 in Canada.
Boilers require yearly maintenance, see chapter “12.2 Maintenance” page 55”.
2 .3
General warnings
9
DANGER:
M
ake sure the gas on which the boiler will operate is
the same type as that specified on the boiler rating plate and on
the colored sticker near the boiler gas connection.
9
WARNING:
This product is a gas appliance that emits poisonous
gases; such as CO (Carbon Monoxide). For this reason, it is
required that CO detectors be installed in buildings where the boiler
is installed. Failure to do so may result in severe injury or death.
9
WARNING:
Should overheating occur or the gas supply valve fail
to shut off, turn off the manual gas control valve to the appliance.
9
WARNING:
Do not use this boiler if any part has been under water.
Immediately call a qualified service technician to inspect the boiler
and to replace any part of the control system and any gas control
which has been under w
ater.
Legend model terminology:
BWC
=
combi boiler
BWH
=
heating only boiler
9
WARNING:
Chlorine and chloramine concentration in domestic
water must be less than 50 ppm.
9
WARNING:
Automatic filling systems are not recommended with
this product as they will continually add fresh water to the system
if there is a leak resulting in the addition of new contaminants that
could reduce the lifespan of the boiler.
9
WARNING:
To minimize the possibility of improper operation,
serious personal injury, fire, or damage to the boiler:
− Always keep the area around the boiler free of combustible materials,
gasoline, and other flammable liquids and vapors.
− Boiler should never be covered or have any blockage to the flow of
fresh air to the boiler.
9
WARNING:
Risk of electrical shock. More than one disconnect
switch may be required to de-energize the equipment before
servicing. Failure to comply with the above could result in severe
personal injury, death or substantial property damage.
9
WARNING:
Failure to adhere to the guidelines on this page can
result in severe personal injury, death or substantial property
damage.
9
WARNING:
Installation and service must be performed by a gas
supplier or a licensed qualified installer/service Technician.
9
WARNING - CALIFORNIA PROPOSITION 65:
This product
contains chemicals known to the State of California to cause
cancer, birth defects or other reproductive harm.
9
CAUTION:
This boiler requires forced water circulation when the
burner is operating. See minimum and maximum flow rates. Severe
damage will occur if the boiler is operated without proper water flow
circulation.
NOTICE:
Minimum 20 AWG, 194°F (90°C), solid thermostat wire must
be used for all low voltage (less than 30 volts) external connections to
the unit. Install conduit as appropriate.
NOTICE:
When the boiler has been filled for the first time or the system
has been drained and refilled, it will be necessary to release any air that
may have become trapped within the appliance heat exchanger. Loo-
sen the bleed screw until water is released and then close. IMPOR-
TANT, THERE ARE NO OTHER MANUAL AIR RELEASE VALVES
LOCATED ON THE APPLIANCE.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have a fire extinguisher available. Read these in-
structions thoroughly and follow all warnings or cautions included in
literature and attached to the appliance.
This product is approved for construction use provided they are installed
in-accordance with this manual, the requirements of the authority having
jurisdiction as well as either the National Fuel Gas Code, ANSI Z223.1/
NFPA 54 in the United States or CAN/CSA B149.1, Natural Gas and
Propane Installation Code in Canada.
The product must be installed indoors and be protected from
environmental elements. The building envelope must be sealed
completely and have a finished roof. Unfinished openings, such as
windows and doors, must be temporarily sealed with plastic sheeting
material as a minimum.
The following instructions must be observed
− The boiler must only be used for its designated purpose, observing
the Installation Instructions.
− Only use the boiler in combinations and with the accessories and
spare parts listed.
− Other combinations, accessories and consumables must only be
used if they are specifically designed for the intended application and
do not affect the system performance and the safety requirements.
− Maintenance and repairs must only be carried out by authorized
professionals.
− You are only allowed to operate the condensing gas boiler with the
combustion air/flue gas system that has been specifically
designed
and approved for this type of boiler.
− Please note that local permission for the flue system and the condensate
water connection to the public sewer system may be required.
− The hot water distribution system must comply with all applicable codes