Description
Honeywell L4081A1023 High & Low Limit Aquastat
Overview:
The Honeywell L4081A1023 is a liquid-filled immersion-type temperature controller designed for high and low limit applications in heating systems. It features two independent SPST snap switches—one for high limit control and one adjustable for low limit or circulator control. The unit allows easy calibration with separate dials and setpoints, all accessible inside the front cover.
Features:
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Immersion type liquid-filled sensing element
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Two independent SPST snap switches
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Fixed high limit differential (10°F) and adjustable low limit differential (10° to 25°F)
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Separate, easy-to-read calibrated dials for high and low limits
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Push-in terminals for quick wiring
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Single sensing element for simplified installation
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Horizontal mounting, no leveling required
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UL and CSA approved
Specifications:
| Specification | Details |
|---|---|
| Application | High Limit, Low Limit |
| Switch Action | SPST (High & Low Limit) |
| Temperature Range (High) | 130°F to 240°F (54°C to 116°C) |
| Temperature Range (Low) | 110°F to 220°F (43°C to 104°C) |
| Differential | Fixed 10°F (High), Adjustable 10° to 25°F (Low) |
| Electrical Rating | 8A @ 120 Vac, 5.1A @ 240 Vac, 0.25 A @ 0.25 to 12 Vdc |
| Ignition Load Rating | Transformer Load: 360 VA |
| Well Spud Size | 3/4" - 14 NPT |
| Dimensions (HxWxD) | 3-7/8" x 4-1/8" x 2-3/4" (98mm x 105mm x 70mm) |
| Insulation Depth | 1-1/2" (38 mm) |
| Mounting | Horizontal |
| Max Ambient Temp | 150°F at switches, 265°F at sensing element |
| Operating Humidity Range | 0 to 95% RH, non-condensing |
| Approvals | UL Listed, CSA Certified |
