Weil-McLain GV90+ User Manual
User’s
®
Information Manual
Gas-Fired Water Boilers
If the information in this manual is not followed exactly, a fire or explosion may result,
causing property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS —
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any telephone in your building.
• Immediately call your gas supplier from a neighbor’s telephone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
Installation & service must be performed by a qualified installer, service technician or the gas supplier.
Part number 550-142-055/0411
GV90+ gas-fired water boiler — User’s Information Manual
Please read this page first
How to use this
manual . . .
To . . . Read/use . . . Page . . .
Learn
precautions
Prevent air
contamination
Maintain
boiler
Locate boiler
components
Start — or —
Shutdown
boiler
Troubleshoot
common
problems
Warnings and definitions
Laundry room or pool — make sure boiler air is
piped to boiler per manual.
Read list of air contaminants you must avoid. Have
boiler air piped in if you can’t avoid.
Set up a plan for maintaining the boiler using
the schedule included in this manual.
Schedule an annual start-up by a qualified
service technician before every heating season.
How the boiler works and illustration.
Follow the Lighting instruction sheet details to
start or shutdown your boiler.
Use the common problems/solutions table to
resolve typical heating system/boiler problems.
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Part number 550-142-055/0411
GV90+ gas-fired water boiler — User’s Information Manual
STOP!! — Read before proceeding
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 property damage.
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.
Hazard definitions
The following defined terms are used throughout
this manual to bring attention to the presence
of hazards of various risk levels or to important
information concerning the life of the product.
Indicates presence of hazards that
will cause severe personal injury,
death or substantial property damage.
Indicates presence of hazards that
can cause severe personal injury,
death or substantial property damage.
Indicates presence of hazards that
will or can cause minor personal
injury or property damage.
Indicates special instructions on in-
stallation, operation or maintenance
that are important but not related to
personal injury or property damage.
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 electrical supply before
performing maintenance.
• To avoid severe burns,
maintenance.
• You must
the boiler started up and serviced at least annually by a
qualified service technician
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. The boiler should attempt
to restart within an hour. If blockage is not obvious or cannot be
removed, have the boiler and system checked by a qualified service
technician.
Should overheating occur or gas supply fail to shut off, DO NOT
•
turn off or disconnect electrical supply to circulator. 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. Imme-
•
diately call a qualified service technician to inspect the boiler and to
replace any part of the control system and any gas control that has
been under water.
Combustion air —
• DO NOT install combustion air intake where there is a risk of
combustion air contamination.
Carbon monoxide detector —
• For Direct Exhaust units, a carbon monoxide detector is required
in the boiler room. The carbon monoxide detector must be wired
on the same electrical circuit as the boiler.
• For
the same electrical circuit as the boiler is strongly recommended.
Boiler water —
• 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.
Leaks in boiler or piping must be repaired at once to prevent
•
make-up water. Use this boiler ONLY in a closed-loop system.
Continual fresh make-up water will reduce boiler life. Mineral buildup in heat exchangers reduces heat transfer, overheats the materials,
and causes failure. Addition of oxygen carried in by make-up water
can cause internal corrosion.
Do not add cold water to hot boiler. Thermal shock can cause heat
•
exchanger to crack.
maintain the boiler as outlined in the manual and have
Direct Vent units, a carbon monoxide detector that is wired on
allow boiler to cool before performing
to ensure boiler/system reliability.
Part number 550-142-055/0411
Freeze protection fluids —
• NEVER use automotive or standard glycol antifreeze. Use only freezeprotection fluids made for hydronic systems. Follow all guidelines
given by the antifreeze manufacturer. Thoroughly clean and flush
any replacement boiler system that has used glycol before installing
the new boiler.
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GV90+ gas-fired water boiler — User’s Information Manual
Prevent combustion air contamination —
Air contamination
Common household and hobby products often contain
fluorine or chlorine compounds. When these chemicals
pass through the boiler, they can form strong acids in
the vent system or boiler. The acid can eat through
the vent or boiler wall, causing serious damage and
presenting a possible threat of flue gas spillage into
the building.
Please read the information below. If the contaminating
chemicals will be present, have your installer pipe the
boiler air from outside per the Boiler manual.
If the boiler is installed in any area
likely to cause contamination
products which would contaminate the
air cannot be removed, you must
combustion air to the boiler
take. Contaminated combustion air will
damage the boiler and vent system, resulting in possible severe personal injury,
death or substantial property damage.
Do not operate a GV90+ boiler in
a laundry room or pool facility
example, without using ducted outside
air. These areas will always contain contaminants.
, or if
pipe
air in-
, for
Combustion air contamination:
Ensure that the combustion air will not contain any of
the contaminants in Figure 1
Combustion air supply openings or intake terminations
must NOT be near a swimming pool, for example.
Avoid areas subject to exhaust fumes from laundry facilities.
These areas will always contain contaminants.
Figure 1
Products to avoid
Corrosive contaminants and sources
Spray cans containing chloro/fluorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
.
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning solvents found in
household laundry rooms
Adhesives used to fasten building products and other similar products
Excessive dust and dirt
Areas likely to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refinishing areas and establishments
New building construction
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Part number 550-142-055/0411
GV90+ gas-fired water boiler — User’s Information Manual
Perform maintenance per schedule below
Figure 2 Service and maintenance schedules
Service technician
(see Boiler Manual for instructions)
Follow the procedures listed in
the Boiler Manual.
Owner maintenance
(see following pages for instructions)
• Check boiler area
Daily
Monthly
Periodically
• Check air openings
• Check pressure gauge
• Check boiler interior piping
• Check venting system
• Check air vents
• Check condensate drain system
• Check relief valve
• Test low water cutoff (if used)
• Clean vent termination/air intake
screens
Annnual start-up
Every 6 months
End of season
• Oil blower motor
• Operate relief valve
• Shut down procedure
Part number 550-142-055/0411
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