The L7224U1002 is a universal electronic oil aquastat from Resideo (Honeywell Home). It replaces the mechanical high-limit and circulator controls on an oil-fired boiler with a single electronic control, and it speaks EnviraCOM, so the boiler can report to a compatible thermostat or service tool.
The advantage of an electronic aquastat over a bimetal control is that it can run a thermal targeting strategy: instead of holding the boiler at one high limit all winter, it lowers the target when the heating load is light and raises it when the house is actually calling hard. On an oil boiler that spends most of the season under part load, that is where the fuel saving comes from.
Universal means one control covers a range of applications that used to need different part numbers, which is worth as much to a service truck as it is to the installation.
-
Brand: Resideo (Honeywell Home)
-
Manufacturer Part #: L7224U1002/U
-
Type: Electronic oil aquastat
-
Communication: EnviraCOM
-
UPC: 085267255431
-
Category: Aquastats & Wells
Full Specifications
| Application |
Oil Aquastat Controller |
| Product Features |
Complies with 2012 Department of Energy Standards, Diagnostic updates through easy-to-read LED displays, ± 2° F accuracy and faster response times, Adjustable high- and low-limit differential, Outdoor reset functionality available with W8735S1000 and W8735Y1000, Provides multizone control, Thermowell horizontal or vertical and flush mounting, EnviraCOM™ communications enabled, Compatible with W8735S3000 Alarm Module |
| Approvals and Standards |
UL Component Recognized, Canadian UL Component Recognized, 2012 Department of Energy Standards Compliant |
| Color |
Gray |
| Compatible With |
Hot Water, Hydronic Heating Systems |
| Mounting Type |
Flush Mounted, Remote Mount, Well Mount, Horizontal Mount, Vertical Mount |
| Low Limit Differential Temperature |
10 °F to 25 °F Adjustable |
| Low Limit Set point Temperature (Min) |
110 °F, 43 °C |
| Low Limit Set point Temperature (Max) |
220 °F, 104 °C |
| High Limit Differential Temperature |
5 °F to 20 °F Adjustable |
| High Limit Set point Temperature (Min) |
130 °F, 54 °C |
| High Limit Set point Temperature (Max) |
240 °F, 116 °C |
| Electrical Ratings at Full Load |
7.4 A at 120 V AC |
| Electrical Ratings at Locked Rotor |
44.4 A Inrush |
| Operating Frequency |
60 Hz |
| Operating Voltage |
120 V AC |
| Type of Fuel |
Oil |
| Switch Type |
3 SPST: High and Low Limit, Circulator |
| Product Height |
7.13 in, 181 mm |
| Product Length |
4.25 in, 109 mm |
| Product Width |
2.63 in, 67 mm |
| Operating Relative Humidity (Min) |
0% Non-condensing |
| Operating Relative Humidity (Max) |
95% Non-condensing |
Documents & Downloads
Compatible Accessories