DO NOT SCRAP IT! MODERATED NATIONAL EXCHANGE NEWSGROUP FOR SALVAGERS > Arizona
> Construction
> Honeywell AQ475A1004 outdoor temperature compensator
Honeywell AQ475A1004 outdoor temperature compensator
Honeywell AQ475A1004 outdoor temperature compensator
AQ475A1004 (AQ475A 1004, AQ475A-1004)
Outdoor Temperature Compensator for Boilers
The AQ475A Aquatrol Outdoor Temperature Compensator automatically regulates boiler water temperature to provide outdoor reset. The DHW Priority option operates the boiler at the Boiler Maximum Temperature setting to heat domestic hot water and can operate or shut down the system circulator. The boiler High Limit safety function must still be provided by the boiler manufacturer's high limit.
• Adjustable settings for boiler maximum temperature, boiler minimum temperature and outdoor low (design) temperature.
• Selectable Warm Weather Shut Down (WWSD) at 70 F (21 C) to prevent summer boiler operation.
• Domestic Hot Water (DHW) priority.
• Replaceable circulator relay common to other Honeywell replacement controls.
• Supply and outdoor sensors included.
• Automatic boiler operating differential.
• Automatic system circulator exercising. Long-life DC relay drive control technology.
• Functional replacement for Honeywell T475A Outdoor Reset.
• Controller and W964F Aquatrol (on-off mode).
The AQ475A automatically cycles the boiler to regulate heating supply water temperature using an outdoor reset curve. The AQ475A includes supply and outdoor sensors, tie-clamp, mounting bracket and wire-nuts.
Outdoor Temperature Compensator for Boilers
10 kilohm at 25 C (77 F), NTC +/- 1%, beta=3950.;Lead Length: 42 in. (1067 mm).
Boiler Min. Control Temperature (F)
Boiler Min. Control Temperature (C)
Control Panel Temperature Rating (F)
Control Panel Temperature Rating (C)
C1-C2 Circulator Output Rating
120 Vac, 10A; 1/3 HP (7.4 AFL, 44.4 ALR); 240 Va pilot duty powered contact
24 to 120 Vac, 3.7 AFL/22.2 ALR max.; 240VA pilot duty, dry contacts
24 Vac, 0.10 A (Dry contacts from thermostat or end switches)
DHW Demand Input (opto-isolated)
6 1/4 in. high x 4 3/8 in. wide x 3 1/4 in. deep
159 mm high x 111 mm wide x 83 mm deep
Operating Humidity Range (% RH)
Less than 90% RH, non-condensing
Approvals, Canadian Standards Association
Contemporary Honeywell electromechanical and electronic 2-wire thermostats
32002190-001 Circulator Replacement Relay.
Outdoor Low Design Control Temperature (F)
Outdoor Low Design Control Temperature (C)
Boiler (Supply) Max. Control Temperature (F)
Boiler (Supply) Max. Control Temperature (C)
Temporary Email: CLindsay@dontscrapit.com (Christian Lindsay)