L8100 | Resideo Immersion Aquastat Controller 24VAC SPST High Limit
Resideo · PLCs & Industrial Controllers
Description The Resideo L8100 is an immersion-type aquastat controller designed to regulate and limit tank temperature in water heaters and hydronic heating systems. It operates on 24 VAC and provides SPST switching action with contacts that open on temperature rise. When the sensed water temperature exceeds the setpoint, the controller interrupts the gas valve circuit for high-limit protection. Technical Specifications Condition New/Never Used Surplus Brand Resideo Category HVAC & Refrigeration Part Number L8100 Subcategory Temperature Controller Product Type Aquastat Controller Application High Limit Switch Action SPST, Break on Temperature Rise Supply Voltage 24 VAC Electrical Rating 2 A max @ 24 VAC Temperature Range 100°F to 180°F Differential 5°F (Fixed) Energy Cutoff Temperature 200°F Maximum Tank Temperature 210°F Bulb Size 3/8 in Capillary Length 39 in Mounting Type Immersion Well Dimensions (H × W × D) 5-5/8 in × 2 in × 2-1/8 in Weight 2 lbs Information About L8100 The L8100 is a temperature control device used for high-limit applications in water heating systems. It mounts in an immersion well and utilizes a fluid-filled sensing element with a 3/8-inch bulb and 39-inch capillary for accurate temperature detection. The controller features fixed differential control and an integrated energy cutoff (ECO) function that interrupts the circuit before the tank temperature reaches the maximum limit. Designed for 24 VAC systems, it supports millivolt circuits with a maximum rating of 2 A. Key Features: Immersion-Type Design: Installs directly into a tank immersion well for direct temperature sensing. SPST Switching Action: Contacts break on temperature rise for high-limit control. 24 VAC Operation: Compatible with standard low-voltage heating control circuits. 2 A Electrical Rating: Supports millivolt control applications. Fixed 5°F Differential: Maintains stable temperature regulation. Energy Cutoff Function: Provides safety interruption at elevated temperatures. 100°F to 180°F Temperature Range: Adjustable control range for hydronic systems. 39-Inch Capillary: Allows flexible installation positioning. The L8100 delivers the reliability and precision required for high-limit temperature control in water heater and hydronic heating systems.
Brand: Resideo · Category: PLCs & Industrial Controllers
Key features
- Immersion-Type Design: Installs directly into a tank immersion well for direct temperature sensing.
- SPST Switching Action: Contacts break on temperature rise for high-limit control.
- 24 VAC Operation: Compatible with standard low-voltage heating control circuits.
- 2 A Electrical Rating: Supports millivolt control applications.
- Fixed 5°F Differential: Maintains stable temperature regulation.
- Energy Cutoff Function: Provides safety interruption at elevated temperatures.
- 100°F to 180°F Temperature Range: Adjustable control range for hydronic systems.
- 39-Inch Capillary: Allows flexible installation positioning.
Specifications
| Manufacturer part number | L8100 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Resideo |
| Category | HVAC & Refrigeration |
| Part Number | L8100 |
| Subcategory | Temperature Controller |
| Product Type | Aquastat Controller |
| Application | High Limit |
| Switch Action | SPST, Break on Temperature Rise |
| Supply Voltage | 24 VAC |
| Electrical Rating | 2 A max @ 24 VAC |
| Temperature Range | 100°F to 180°F |
| Differential | 5°F (Fixed) |
| Energy Cutoff Temperature | 200°F |
| Maximum Tank Temperature | 210°F |
| Bulb Size | 3/8 in |
| Capillary Length | 39 in |
| Mounting Type | Immersion Well |
| Dimensions (H × W × D) | 5-5/8 in × 2 in × 2-1/8 in |
| Weight | 2 lbs |
| Product type | Temperature Controller |
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