Aquatrol� universal injection/mixing boiler reset control with DHW priority. Overview Honeywell AQ252 AQUATROL universal injection/mixing boiler reset controls for single temperature, residential hydronic heating systems ensure ample supply of hot water through energy-efficient outdoor temperature compensated control. Features Displays of outdoor temperature on all AQ1000 thermostats when used with an AQ12C10 outdoor sensor (included) Customizable control settings allow for greater control and comfort Intuitive and accessible programming interface and central program of zone set points and setback Zoning control for up to four zones and can be up to 64 zones using expansion panels Boiler short cycling protection, boiler post purge and boiler shock prevent from cold water returning to boiler Automated test and purge feature for quick start-up and troubleshooting Line and low-voltage output and domestic hot water priority and priority override protection Non-volatile EPROM memory retains program settings Product Specifications Application Controls one boiler and one mixing (either variable speed injection or floating valve mixing) loop in a hydronic zoning system. Dimensions (in.) 16 1/2 in wide x 8 in. high x 3 3/8 in deep Dimensions (mm) 42 cm wide x 20.3 cm high x 8.5 cm deep Weight (lb) 6.0 lbs Weight (kg) 2.7 kg Approvals, Canadian Standards Association CSA C/US Certified to CSA and UL Standards, File No. LR76030 Tradeline Value Tradeline Thermostat Compatibility AQ1000 Series 2-wire communicating thermostats and most digital thermostats Setback Program 7 day, up to 2 setback periods/day. User Interface LCD Display and a 7 button Key Pad Number of Zones 4 Zoning Devices Controlled Zone valves with end switches Boiler Control Temperature (F) Supply--Max: OFF, 120F to 225 F; Min: OFF, 59F to 180F; Differential--2 F to 41 F or Auto (minimum 2 minutes on time) Boiler Control Temperature (C) Supply--Max: OFF, 49C to 107 C; Min: OFF, 15C to 82C; Differential--1 C to 23 C or Auto (minimum 2 minutes on time) Boiler Design Temperature (F) 80F to 210F Boiler Design Temperature (C) 26C to 99C Outdoor Low Design Control Temperature (F) -60F to 32F Outdoor Low Design Control Temperature (C) -51 C to 0 C Return Min. Control Temperature (F) 80 F to 180 F Return Min. Control Temperature (C) 27C to 82C Boiler Heat Post Purge Off, 10 seconds to 30 minutes (factory default is 30 seconds) Pump/Valve exercise 30 seconds per 2 weeks of space heating inactivity R-C Output (on transformer) 38 VA, 24 Vac Class II R-C Input (on Control and Zoning Modules) 24 Vac Class II (input on Control and Zoning Modules) Demand Input Heat Demand (Thermostat R-W), Auxiliary Demand, and DHW Demand--External dry contacts connection only B-B Communication Bus Terminals Low voltage, Class II, 2-wire polarity-insensitive, digital communicating link to other Control or Zoning modules. Zone Module Thermostat Input Low voltage, Class II, 2-wire polarity-insensitive, digital communicating with power link to AQ1000 series thermostat. Output Ratings Boiler (T-T)-- 24 Vac, 0.5A, 12VA; Auxiliary Low Voltage-- 24 Vac, 0.5A, 12VA; Boiler Pump-- 120 Vac/250 Vac 5A, 1/3HP; DHW Pump/Valve-- 120 Vac 5A, 1/3HP; Auxiliary Pump-- Dry contact output, 120 Vac/250 Vac 5A, 1/3 HP Zone Output Contact Rating Pumps: 120 Vac/250 Vac, 5A, 1/3 HP,Valves: 24 Vac, 0.5 A, 12 VA Mixing Valve Floating Output (Com,O,C) 24 Vac rated dry contacts Mixing Valve Modulating Output 0-10 Vdc Secondary Pump Output Rating 120 Vac 5A, 1/3HP Variable Speed Injection Pump Output Triac modulated; 120 Vac, 2.1A, 1/6HP Electrical Connections Wire-clamp screw terminals, Maximum 2 x 14 AWG each on line voltage terminals Operating Humidity Range (% RH) 5 to 90% RH, non-condensing Secondary Loop Temperature Range (F) Mixing (Supply) max control--80 F to 210 F; Mixing (Supply) min control--35 F to 150 F; Mixing (Supply) Design Temperature--70 F to 210 F; Return min control--80 F to 180 F Secondary Loop Temperature Range (C) Mixing (Supply) max control--27 C to 99 C; Mixing (Supply) min control--2 C to 66 C; Mixing (Supply) Design Temperature--21 C to 99 C; Return min control--27 C to 82 C WWSD (Warm Weather Shut Down) Temperature (F) Off, 35 F to 100 F WWSD (Warm Weather Shut Down) Temperature (C) Off, 1 C to 38 C Sensor Supply/Return Sensor--10 kilohm NTC thermistor at 25 C (77 F) �0.5F (�0.3C) up to 500 ft (150 M) using 18 AWG or larger wire, Lead Length: 10 ft. (3050 mm); Outdoor Sensor--10 kilohm NTC thermistor at 25 C (77 F) � 0.5F (�0.3C) up to 500 ft (150 M) using Replacement Parts AQ10X38 24 Vac 38 VA transformer,AQ12C11 supply/return/mixed loop sensor,AQ15740B 4-zone valve with end switch expansion module,AQ12C10 outdoor sensor,AQ15200B universal injection/mixing boiler reset module Temperature Ratings (C) Panel--0 C to 55 C; Sensor-- -50 C to +110 C Temperature Ratings (F) Panel--32 F to 130 F; Sensor-- -58 F to +230 F Supply Voltage 120V 60 Hz