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SlimFit
®
Series 2
Please read before proceeding
Installer— Read all instructions, including this
manual and all other information shipped with the
boiler, before installing. Perform steps in the order
given.
User — This manual is for use only by a qualified
heating installer/service technician. Refer to User's
Information Manual for your reference.
User — Have this boiler serviced/inspected by a
qualified service technician, at least annually.
Failure to comply with the above could result in
severe personal injury, death or substantial prop-
erty damage.
If any part of a boiler, burner or its controls has
been sprayed with or submerged under water,
either partially or fully, DO NOT attempt to op-
erate the boiler until the boiler has been either
replaced or completely repaired, inspected,
and you are sure that the boiler and all compo-
nents are in good condition and fully reliable
Otherwise, by operating this boiler, you will cause
a fire or explosion hazard, and an electrical shock
hazard, leading to serious injury, death, or sub-
stantial property damage. See the instructions
at right.
The installer must verify that at least one carbon monoxide alarm has been installed within a residential living space
or home following the alarm manufacturer's instructions and applicable local codes before putting the appliance into
operation. Failure to adhere can result in severe personal injury, death or substantial property damage.
Failure to adhere to the guidelines below can result in severe personal injury, death or substantial property
damage
When servicing boiler —
•
To avoid electric shock, disconnect all
electrical supplies to the boiler before
performing maintenance.
•
To avoid severe burns, allow boiler to
cool before performing maintenance.
•
This boiler contains ceramic fiber and
fiberglass materials. Refer to the WARN-
ING and instructions on page 87.
Boiler operation —
•
Do not block flow of combustion or venti-
lation air to boiler.
•
Should overheating occur or gas supply
fail to shut off, do not turn off or discon-
nect electrical supply to pump. Instead,
shut off the gas supply at a location
external to the appliance.
Boiler water —
•
The SlimFit heat exchanger is made
of aluminum, and requires that system
pH always be between 7.0 and 8.5 and
water chemistry be checked.
Chemical treatment is required See
page 79 for details
Commonwealth of
Massachusetts
Part number 550-100-561/0224
commercial condensing gas
Thoroughly flush the system (without
•
boiler connected) to remove sediment.
Install a strainer or other sediment
removal equipment if necessary. The
high-efficiency heat exchanger can be
damaged by build-up or corrosion due to
sediment.
•
Do not use petroleum-based cleaning
or sealing compounds in boiler system.
Gaskets and seals in the system may be
damaged. This can result in substantial
property damage.
•
Continual fresh make-up water will
reduce boiler life. Mineral buildup in heat
exchanger reduces heat transfer, over-
heats the aluminum heat exchanger, and
causes failure. Addition of oxygen carried
in by make-up water can cause internal
corrosion. Leaks in boiler or piping must
be repaired at once to prevent make-up
water. Use this boiler ONLY in a closed-
loop system.
•
Do not add cold water to a hot boiler.
Thermal shock can cause heat exchang-
er to crack.
When the boiler is installed within the Commonwealth of Massachusetts:
•
This product must be installed by a licensed plumber or gas fitter.
•
If antifreeze is used, a reduced pressure back-flow preventer device shall be used.
•
Sidewall vent air installations — see instruction on page 22.
-
— Boiler Manual
fired water boiler
Write in the CP number in the space provided
on the Installation certificate on page 117 if not
already shown.
When calling or writing about the boiler— Please
have the boiler model number from the boiler rating
label and the CP number from the boiler jacket.
Consider piping and installation when determining
boiler location.
Any claims for damage or shortage in shipment
must be filed immediately against the transporta-
tion company by the consignee.
Saltwater Damage — The exposure of boiler components to
saltwater can have both immediate and long-term effects. While
the immediate effects of saltwater damage are similar to those
of freshwater (shorting out of electrical components, washing
out of critical lubricants, etc.), salt and other contaminants left
behind can lead to longer term issues after the water is gone
due to the conductive and corrosive nature of the salt residue.
Therefore, Weil-McLain equipment contaminated with saltwater
or polluted water will no longer be covered under warranty and
should be replaced.
Electrical Damage — If any electrical component or wiring
came into contact with water, or was suspected to have come
into contact with water, replace the boiler with a new Weil-
McLain boiler.
Freeze protection fluids —
NEVER use automotive or standard glycol
antifreeze, even glycol made for hydronic
systems. Use only freeze-protection fluids
recommended in this manual (see page 79).
Follow all guidelines given. Thoroughly clean
and flush any replacement boiler system that
has used glycol before installing the new
SlimFit boiler.
Frozen Water Damage
Hazard
Residences or buildings that are unattended
in severely cold weather, boiler system
components failures, power outages, or other
electrical system failures could result in fro-
zen plumbing and water damage in a matter
of hours. For your protection, take preventa-
tive actions such as having a security system
installed that operates during power outages,
senses low temperature, and initiates an
effective action. Consult with your boiler
contractor or a home security agency.
5
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