Lennox International Inc GWB9-050IH-2, GWB9-075IH-2, GWB9-100IH-2 Aluminum Series

APPENDIX A - WATER QUALITY, WATER TREATMENT AND FREEZE PROTECTION

Aluminum Series

High Efficiency Gas-Fired Boiler

DIELECTRIC ISOLATION & ANTIFREEZE PROTECTION

ADDENDUM

!WARNING

Follow these instructions to prevent damage to boiler’s heat exchanger caused by inadequate dielectric isolation, incorrect water treatment or antifreeze application. Failure to comply could result in death or serious injury.

•Install boiler so gas ignition system components are protected from water (dripping, spraying, rain, etc) during appliance operation and service (circulator re- placement, etc).

•DIELECTRIC ISOLATION

Two (2) 1-1/4” X 1-1/4” Female to female dielectric isolation unions are shipped loose in boiler parts bag. Install Dielectric Isolation unions at boiler supply line and return line. Install isolation fittings nearest boiler prior to system piping connections.

•WATER TREATMENT and ANTIFREEZE PROTECTION

MUST be applied for ALL aluminum series high efficiency gas-fired boilers using antifreeze protection.

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