Weil-McLain GV90+ manual STOP!! Read before proceeding, Hazard definitions

GV90+ gas-fired water boiler — User’s Information Manual

STOP!! — Read before proceeding

User — Have this boiler serviced/ inspected by a qualified service tech- nician, at least annually.

Failure to comply with the above could result in severe personal injury, death or substantial property dam- age.

When calling or writing about the boiler— Please have the boiler model number from the boiler rat- ing 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 dam- age.

Indicates presence of hazards that can cause severe personal injury, death or substantial property dam- age.

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, allow boiler to cool before performing maintenance.

•You must maintain the boiler as outlined in the 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. 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 Direct Vent units, a carbon monoxide detector that is wired on 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 build- up 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.

Freeze protection fluids —

•NEVER use automotive or standard glycol antifreeze. Use only freeze- protection 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.

Part number 550-142-055/0411 3