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STOP! READ THIS BEFORE PROCEEDING . . .
Failure to adhere to the guidelines on this page
can result in severe personal injury, death or
substantial property damage.
Boiler service and maintenance —
❏
To avoid electric shock, disconnect all electrical supplies
to the boiler before performing maintenance if wiring
will be exposed.
❏
To avoid severe burns, allow boiler to cool before per-
forming maintenance.
❏
You must maintain the boiler as outlined in this manual
and have the boiler started up and serviced at least
annually
by a qualified service technician to ensure
boiler/system reliability.
Boiler operation —
❏
Do not block flow of combustion or ventilation air to
boiler. This boiler is equipped with a control which will
automatically shut down the boiler should air or vent
be blocked. If vent or air blockage is easily accessible
and removable, remove it. If the boiler display indicates
a manual reset lockout, follow the procedure on Fig-
ure 7, page 8 to reset the boiler. (If blockage is not obvi-
ous or cannot be removed, have the boiler and system
checked by a qualified service technician.)
❏
Do not allow contaminated air to enter the boiler room
(or air inlet pipe if direct vented). See page 9 for details.
Should overheating occur or gas supply fail to shut off,
do not turn off or disconnect electrical supply to boiler.
Instead, shut off the gas supply at a location external to
the appliance.
❏
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 water.
Boiler water —
❏
Have boiler water chemistry checked at least annually by
a qualified service technician.
❏
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.
❏
DO NOT use “homemade cures” or “boiler patent
medicines”. Serious damage to boiler, personnel and/or
property may result.
❏
Continual fresh makeup water will reduce boiler life.
Mineral build-up in boiler heat exchanger reduces heat
transfer, overheats the metal, and causes heat exchanger
failure. Addition of oxygen can cause internal corrosion
in system components. Leaks in boiler or piping must be
repaired at once to prevent makeup water.
❏
Do not add cold water to hot boiler. Thermal shock can
cause boiler heat exchanger to crack.
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 frozen
plumbing and water damage in a matter of hours. For your
protection, take preventative 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.
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 operate the boiler until the boiler has
been either replaced or completely repaired,
inspected, and you are sure that the boiler
and all components 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 substantial property damage.
See the instructions at right.
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.), the 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 saltwa-
ter 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.
Part number 550-100-560/0321
3
SlimFit
®
Series 3
gas-fired water boiler
— User’s Information Manual
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