• An immersion type liquid-filled sensing element actuates two snap switches.
• One switch operates as a high limit control.
• The other switch operates as a low limit and/or circulator control, depending on the model.
• Controller may be mounted in any positioning and needs no leveling.
• Separate, easy-to-read, calibrated dial and setpoint adjustments for each switch.
• Differential adjustment on low limit or circulator switch.
• All adjustments accessible inside front cover.
• Push-in terminals for quick connecting.
• Single sensing element for easy installation.
• Two SPST snap switches act independently at respective temperature settings.Multiple Aquastat Controllers, High Limit and Circulator| Operating Range, Low Limit (F) | 110 F to 220 F |
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| Overview | High limit, low limit and/or circulator controllers used to regulate boiler water temperature in gas- or oil-fired hydronic heating systems. |
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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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| Operating Range, High Limit (C) | 54 C to 116 C |
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| Electrical Ratings | 0.25 A @ 0.25 to 12 Vdc |
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| Electrical Rating (ignition) | Transformer Load: 360 VA |
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| Application | High Limit and Circulator |
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| Switching Action | SPST: High Limit & Circulator |
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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.) | 3 7/8 in. high x 4 1/8 in. wide x 2 3/4 in. deep. |
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| Dimensions (mm) | 98 mm high x 105 mm wide x 70 mm deep. |
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| Insulation Depth (in.) | 3 in. |
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| Electrical Ratings (AFL) | 8A @ 120 Vac |
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| Insulation Depth (mm) | 76 mm |
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| Operating Humidity Range (% RH) | 0 to 95% RH, non-condensing |
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| Electrical Ratings (ALR) | 30.6A @ 240 Vac |
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| Differential Temperature (F) | 10 F fixed |
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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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| Approvals, Underwriters Laboratories Inc | UL Listed: File No. MP466, Vol. 12, Sec. 4, Guide No. MBPR2 |
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| Approvals, Canadian Standards Association | Certified: File No. LR95329-1 |
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Product Family
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