• Immersion-type controllers that combine high limit protection with low limit and circulator control in forced hydronic heating systems.
• Provide multizone control by using a separate circulator and R845 Relay for each zone.
• Include diaphragm powerhead and Micro Switch™ assembly that respond to temperature changes in boiler water.
• Mount directly to boiler.
• Select models include large transformers and extra terminals for supplying power to low voltage zone valves.
• Require 24 Vac thermostat with heat anticipator set at 0.2 A (plus current draw of gas valve on L8124E).
• TRADELINE models include tube of heat conductive compound and range stops.Triple Aquastat Relay, SPST: High & Low Limit| Operating Range, Low Limit (F) | 110 F to 220 F |
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| Overview | Immersion-type controllers that combine high limit protection with low limit and circulator control in forced hydronic heating systems, including domestic hot water service. |
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| Minimum Ambient Temperature (F) | -30 F |
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| Operating Range, Low Limit (C) | 43 C to 104 C |
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| Operating Range, High Limit (F) | 130 F to 240 F |
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| Minimum Ambient Temperature (C) | -9 C |
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| Maximum Safe Operating Pressure (psi) | 200 psi on outside of immersion well, 100 psi on capsule if inserted directly. |
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| Operating Range, High Limit (C) | 54 C to 116 C |
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| Maximum Safe Operating Pressure (kPa) | 1378 kPa on outside of immersion well, 690 kPa on capsule if inserted directly. |
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| Application | Triple Aquastat Relay with High limit |
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| Electrical Ratings (burner AFL) | Line Voltage: 7.4 A @ 120 Vac; 3.7 A @ 240 Vac |
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| Electrical Ratings (burner ALR) | Line Voltage: 44.4 A @ 120 Vac; 22.7 A @ 240 Vac |
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| Electrical Ratings (circulator AFL) | 3.7 A @ 240 Vac |
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| Electrical Ratings (circulator ALR) | 22.7 A @ 240 Vac |
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| Switching Action | SPST: High & Low Limit |
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| Operating Temperature Range (F) | High Limit-- 130 F to 240 F; Low Limit-- 110 F to 220 F |
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| Operating Temperature Range (C) | High Limit-- 54 C to 116 C; Low Limit-- 43 C to 104 C |
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| Dimensions (in.) | 6 1/8 in. high x 4 3/8 in. wide x 3 1/16 in. deep |
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| Dimensions (mm) | 156 mm high x 111 mm wide x 78 mm deep |
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| Operating Humidity Range (% RH) | 0 to 95% RH, non-condensing |
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| Electrical Connections | Quick-Connect / Screw |
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| Differential Temperature (F) | High limit : 10 F fixed; low limit: 10-25 F adj. |
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| Maximum Ambient Temperature (F) | 150 F at switches; 265 F at sensing element |
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| Maximum Ambient Temperature (C) | 66 C at switches, 129 C at sensing element. |
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