58
Aluminum Series
High Efficiency Gas-Fired Boiler
DIELECTRIC ISOLATION & ANTIFREEZE PROTECTION
APPENDIX A - WATER QUALITY, WATER TREATMENT AND FREEZE PROTECTION
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
replacement, 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.
