The AQ475A Aquatrol Outdoor Reset Control which automatically regulates boiler water temperature according to outdoor temperature. The Domestic Hot Water Priority option allows maximum boiler temperature to be used to heat a indirect water heater. The Boiler High Limit safety function must still be provided by the boiler manufacture's high limit.
Features:
Adjustable settings for boiler maximum temperature, boiler minimum temperature and outdoor low design temperature.
Selectable Warm Weather Shut Down.
Domestic Hot Water (DHW) priority.
Automatic Load matching boiler operating differential which we feel to be a key feature.
Automatic circulator exercising which keeps system circulator from failing due to being inactive during the summer months.
Check out Honeywell's web site at Http://Honeywell.ca and go to water controls then products then Outdoor temperature compensators and Aq475a
Heating your home with much lower water temperature: 120 degrees for outside temps of 30 degrees
