Sales (6)
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| Resideo Hydronic Heating Solutions Brochure (English) | 07/2021 | 4674780 kb |
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| Resideo Hydronic Heating Solutions Brochure (French) | 07/2021 | 4456147 kb |
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| Cross Reference Guide for Residential Combustion Heating and Cooling Parts (English) | 11/2020 | 2600153 kb |
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| Heating and Cooling Components Application Selection and Cross Reference Guide (English) | 07/2024 | 2001713 kb |
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| Residential Combustion Application Selection and Cross-Reference Guide (English) | 11/2023 | 9194921 kb |
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| The Universal Choice - Selector Guide/Cross Reference for Residential Combustion Products (English) | 04/2020 | 119272 kb |
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Install (4)
| Title | Date Posted | Size | ||
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| Installation Instructions for L4080B,D and L8080A Aquastat Controllers (English) | 06/2026 | 478386 kb |
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| China Hazardous Substance Table (English, Chinese) | 08/2019 | 575529 kb |
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| Product Data for L4080B, L4080D, L4080F, L4080G, L8080A Aquastat Controllers (English) | 04/1986 | 1417911 kb |
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| Installation Instructions for L4080F, L4080G Aquastat Controllers (English) - Legacy Product Document | 06/1986 | 294671 kb |
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| Application | Immersion type controllers for hydronic heating systems that turn off the burner whenever the boiler water temperature rises to the set point. |
|---|---|
| Product Features | High Limit Aquastat Controller has adjustable set point., Models available for use with immersion wells or for direct immersion if faster response is needed., A factory-set stop is available on L4080 to prevent setting the control at too high a temperature., Models available with second limit switch to shut off all gas to the burner., Liquid fill in sensing element expands as the boiler temperature rises., At the set point temperature, a diaphragm-actuated snap switch breaks the power supply to the burner primary control. |
| Approvals and Standards | UL Listed: -models with well, File No. MP466, Guide No. MBPR, UL Listed: -models less well, File No. MP466, Guide No. MBPR2, AGA Design Certified: Test Report 23-11B |
| Compatible With | Hot Water, Hydronic Heating Systems |
| Includes | Siphon Loop |
| Mounting Option | Mount using 1/4 in. NPT female threads, Surface mount through base of case |
| Differential Temperature | 30 °F |
| Operating Temperature (Min) | 140 °F, 78 °C |
| Operating Temperature (Max) | 240 °F, 133 °C |
| Electrical Ratings at Full Load | 8A @ 120 Vac: 4A @ 240 Vac |
| Electrical Ratings at Locked Rotor | 48A @ 120 Vac: 24A @ 240 Vac |
| Electrical Ratings Millivolt | 0.25 A @ 0.25 to 12 Vdc |
| Switch Action | Contact breaks on temperature rise to set point |
| Well Spud Size | 0.5 in, 13 mm |
| Insulation Depth | 1.5 in, 38 mm |
| Ambient Temperature (Max) | 40 °F above setpoint or 265 °F, which ever is lower |
| Hazmat Information | UN 1294, TOLUENE, 3, II |
Automatic Burner Shutoff
The High Limit Aquastat Controller from Resideo is ideal for hydronic heating systems turning off the burner whenever the boiler water temperature rises to the adjustable set point—to optimize safety.
This controller is 1 in. x 1 in. x 1 in. and is rated at 100-200 degrees F with an 8 degree F fixed differential.
Features include:
- Immersion type controller
- Adjustable set point
- Models available for immersion wells or direct immersion
- Insertion depth is 1 1/2 to 3 in
- Models available with second limit switch to shut off all gas to the burner
- Liquid fill in sensing element expands as the boiler temperature rises
- At the set point temperature, a diaphragm-actuated snap switch breaks the power supply to the burner primary control
- Includes a siphon loop