Resideo L4008E1305 Temperature Control
The Resideo L4008E1305 is a high-limit remote bulb immersion controller designed for hydronic heating systems requiring critical over-temperature protection. This SPST aquastat features a manual reset mechanism, ensuring the system remains offline for inspection if the high-limit threshold is breached. With an operating temperature range of 100-240°F and a fixed high-limit stop at 240°F, this unit provides precise thermal management for boilers and storage tanks. The 5-1/2 foot capillary length allows for flexible placement of the sensing bulb, while the multi-positional design supports both horizontal and vertical mounting configurations. Engineered for reliability, the contacts break on temperature rise, making it a standard component for contractors maintaining commercial HVAC systems or high-efficiency residential boilers. When installing, ensure the immersion well is properly seated to maintain thermal transfer accuracy and prevent nuisance tripping during peak load cycles.
Technical Specifications:- Function: High Limit / Manual Reset
- Switching: SPST (Contacts break on temperature rise)
- Temperature Range: 100°F to 240°F (38°C to 116°C)
- Capillary Length: 66 inches (5 1/2 feet)
- Mounting: Vertical or Horizontal
- Factory Setting: 240°F High Limit Stop
- Manual Reset Safety: Prevents automatic heater restart after a high-limit event, requiring physical intervention for system safety.
- Remote Sensing Versatility: The extended remote bulb capillary allows the controller to be mounted away from the heat source for easier access.
- Direct Replacement: Fits standard 1/2 inch or 3/4 inch NPT immersion wells, simplifying boiler temperature control swaps.
- Rugged Construction: Built for high-ambient mechanical rooms where vibrations and fluctuating temperatures are common.
Can the manual reset be bypassed for automatic operation?
No, the L4008E1305 is specifically designed as a safety device; the manual reset is a mechanical requirement to ensure the technician identifies the cause of the overheat condition.
Does this unit include the immersion well?
This model is typically sold as the controller and capillary assembly; if the existing well is damaged or scaled, a compatible Honeywell/Resideo immersion well should be sourced separately.
Is this compatible with vertical pipe runs?
Yes, the internal liquid-filled sensing element is designed to function accurately in both vertical and horizontal mounting orientations without affecting the setpoint calibration.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $266.08
-65%$266.08
$93.13Resideo L4008E1305 Temperature Control
The Resideo L4008E1305 is a high-limit remote bulb immersion controller designed for hydronic heating systems requiring critical over-temperature protection. This SPST aquastat features a manual reset mechanism, ensuring the system remains offline for inspection if the high-limit threshold is breached. With an operating temperature range of 100-240°F and a fixed high-limit stop at 240°F, this unit provides precise thermal management for boilers and storage tanks. The 5-1/2 foot capillary length allows for flexible placement of the sensing bulb, while the multi-positional design supports both horizontal and vertical mounting configurations. Engineered for reliability, the contacts break on temperature rise, making it a standard component for contractors maintaining commercial HVAC systems or high-efficiency residential boilers. When installing, ensure the immersion well is properly seated to maintain thermal transfer accuracy and prevent nuisance tripping during peak load cycles.
Technical Specifications:- Function: High Limit / Manual Reset
- Switching: SPST (Contacts break on temperature rise)
- Temperature Range: 100°F to 240°F (38°C to 116°C)
- Capillary Length: 66 inches (5 1/2 feet)
- Mounting: Vertical or Horizontal
- Factory Setting: 240°F High Limit Stop
- Manual Reset Safety: Prevents automatic heater restart after a high-limit event, requiring physical intervention for system safety.
- Remote Sensing Versatility: The extended remote bulb capillary allows the controller to be mounted away from the heat source for easier access.
- Direct Replacement: Fits standard 1/2 inch or 3/4 inch NPT immersion wells, simplifying boiler temperature control swaps.
- Rugged Construction: Built for high-ambient mechanical rooms where vibrations and fluctuating temperatures are common.
Can the manual reset be bypassed for automatic operation?
No, the L4008E1305 is specifically designed as a safety device; the manual reset is a mechanical requirement to ensure the technician identifies the cause of the overheat condition.
Does this unit include the immersion well?
This model is typically sold as the controller and capillary assembly; if the existing well is damaged or scaled, a compatible Honeywell/Resideo immersion well should be sourced separately.
Is this compatible with vertical pipe runs?
Yes, the internal liquid-filled sensing element is designed to function accurately in both vertical and horizontal mounting orientations without affecting the setpoint calibration.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Resideo L4008E1305 is a high-limit remote bulb immersion controller designed for hydronic heating systems requiring critical over-temperature protection. This SPST aquastat features a manual reset mechanism, ensuring the system remains offline for inspection if the high-limit threshold is breached. With an operating temperature range of 100-240°F and a fixed high-limit stop at 240°F, this unit provides precise thermal management for boilers and storage tanks. The 5-1/2 foot capillary length allows for flexible placement of the sensing bulb, while the multi-positional design supports both horizontal and vertical mounting configurations. Engineered for reliability, the contacts break on temperature rise, making it a standard component for contractors maintaining commercial HVAC systems or high-efficiency residential boilers. When installing, ensure the immersion well is properly seated to maintain thermal transfer accuracy and prevent nuisance tripping during peak load cycles.
Technical Specifications:- Function: High Limit / Manual Reset
- Switching: SPST (Contacts break on temperature rise)
- Temperature Range: 100°F to 240°F (38°C to 116°C)
- Capillary Length: 66 inches (5 1/2 feet)
- Mounting: Vertical or Horizontal
- Factory Setting: 240°F High Limit Stop
- Manual Reset Safety: Prevents automatic heater restart after a high-limit event, requiring physical intervention for system safety.
- Remote Sensing Versatility: The extended remote bulb capillary allows the controller to be mounted away from the heat source for easier access.
- Direct Replacement: Fits standard 1/2 inch or 3/4 inch NPT immersion wells, simplifying boiler temperature control swaps.
- Rugged Construction: Built for high-ambient mechanical rooms where vibrations and fluctuating temperatures are common.
Can the manual reset be bypassed for automatic operation?
No, the L4008E1305 is specifically designed as a safety device; the manual reset is a mechanical requirement to ensure the technician identifies the cause of the overheat condition.
Does this unit include the immersion well?
This model is typically sold as the controller and capillary assembly; if the existing well is damaged or scaled, a compatible Honeywell/Resideo immersion well should be sourced separately.
Is this compatible with vertical pipe runs?
Yes, the internal liquid-filled sensing element is designed to function accurately in both vertical and horizontal mounting orientations without affecting the setpoint calibration.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
