Weil-McLain - 550-141-850/0599

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Contents

Boiler manual Installation Maintenance Start Up Parts WARNING This manual must only be used by a qualified heating instailer service technician Failure to comply could result In severe personal injury death or substantial property damage Part No 550 141 850 0699 GOLD GV Water boiler series 3 manual How it works Control module The GCM control module responds to signals from the room thermostat air pressure switch inlet water sensor and boiler limit circuit to operate the circulators gas valve igniter and blower When a room thermostat calls for heat the GCM starts the system circulator and blower The GCM runs the blower long enough to purge the boiler flue passages then turns on the igniter ...