Tjernlund Products UC1 Interlock Controller
The Tjernlund UC1 Universal Interlock Control is an essential component for technicians managing draft inducer and power venter installations. This interlock controller acts as the central logic board, coordinating the sequence of operation between the HVAC appliance and the venting system. Designed for 24VAC, 115VAC, or dry contact call-for-heat signals, the UC1 features a pre-purge and post-purge cycle to ensure proper combustion gas evacuation. Built with high-grade solid-state circuitry, it minimizes mechanical failure points while providing on-board LED diagnostics for rapid troubleshooting in the field. When replacing legacy controls or performing a venter motor installation, the UC1 offers field-selectable DIP switches to calibrate timing and pressure switch sensitivity. This duct monitoring control is compatible with nearly all Tjernlund models, ensuring reliable side-wall venting performance and total system safety by preventing burner ignition until the pressure switch proves adequate draft.
- Universal Compatibility: Interfaces seamlessly with gas-fired or oil-fired furnaces, boilers, and water heaters.
- Enhanced Safety Logic: Integrated interlock safety switch prevents appliance operation during venter failure or blocked flue conditions.
- Simplified Wiring: Color-coded terminal strips and inclusive 24V transformer simplify retrofitting into existing control circuits.
- Diagnostic Feedback: On-board LEDs indicate power status, call for heat, and drafting performance for faster service calls.
- Customizable Timing: Adjustable post-purge settings prevent heat exchanger stress and ensure complete flue gas clearance.
Common Questions
How do you wire a Tjernlund UC1 to a 24V thermostat?
The UC1 accepts a 24V signal through terminals R and W. Ensure the common wire is grounded correctly to the control board to prevent signal interference during the ignition sequence.
What do the LED codes on the UC1 indicate?
The LEDs track the sequence of operation: green indicates power, amber confirms the call for heat, and a second green light proves the fan prover switch is closed and the burner is cleared to fire.
Can the UC1 be used with millivolt systems?
Yes, the UC1 supports millivolt heating systems using a dry contact configuration, provided the control itself is powered by a separate 115V or 24V source.
This item is not eligible for free shipping.
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: $198.58
-65%$198.58
$69.50Tjernlund Products UC1 Interlock Controller
The Tjernlund UC1 Universal Interlock Control is an essential component for technicians managing draft inducer and power venter installations. This interlock controller acts as the central logic board, coordinating the sequence of operation between the HVAC appliance and the venting system. Designed for 24VAC, 115VAC, or dry contact call-for-heat signals, the UC1 features a pre-purge and post-purge cycle to ensure proper combustion gas evacuation. Built with high-grade solid-state circuitry, it minimizes mechanical failure points while providing on-board LED diagnostics for rapid troubleshooting in the field. When replacing legacy controls or performing a venter motor installation, the UC1 offers field-selectable DIP switches to calibrate timing and pressure switch sensitivity. This duct monitoring control is compatible with nearly all Tjernlund models, ensuring reliable side-wall venting performance and total system safety by preventing burner ignition until the pressure switch proves adequate draft.
- Universal Compatibility: Interfaces seamlessly with gas-fired or oil-fired furnaces, boilers, and water heaters.
- Enhanced Safety Logic: Integrated interlock safety switch prevents appliance operation during venter failure or blocked flue conditions.
- Simplified Wiring: Color-coded terminal strips and inclusive 24V transformer simplify retrofitting into existing control circuits.
- Diagnostic Feedback: On-board LEDs indicate power status, call for heat, and drafting performance for faster service calls.
- Customizable Timing: Adjustable post-purge settings prevent heat exchanger stress and ensure complete flue gas clearance.
Common Questions
How do you wire a Tjernlund UC1 to a 24V thermostat?
The UC1 accepts a 24V signal through terminals R and W. Ensure the common wire is grounded correctly to the control board to prevent signal interference during the ignition sequence.
What do the LED codes on the UC1 indicate?
The LEDs track the sequence of operation: green indicates power, amber confirms the call for heat, and a second green light proves the fan prover switch is closed and the burner is cleared to fire.
Can the UC1 be used with millivolt systems?
Yes, the UC1 supports millivolt heating systems using a dry contact configuration, provided the control itself is powered by a separate 115V or 24V source.
This item is not eligible for free shipping.
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.
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Description
The Tjernlund UC1 Universal Interlock Control is an essential component for technicians managing draft inducer and power venter installations. This interlock controller acts as the central logic board, coordinating the sequence of operation between the HVAC appliance and the venting system. Designed for 24VAC, 115VAC, or dry contact call-for-heat signals, the UC1 features a pre-purge and post-purge cycle to ensure proper combustion gas evacuation. Built with high-grade solid-state circuitry, it minimizes mechanical failure points while providing on-board LED diagnostics for rapid troubleshooting in the field. When replacing legacy controls or performing a venter motor installation, the UC1 offers field-selectable DIP switches to calibrate timing and pressure switch sensitivity. This duct monitoring control is compatible with nearly all Tjernlund models, ensuring reliable side-wall venting performance and total system safety by preventing burner ignition until the pressure switch proves adequate draft.
- Universal Compatibility: Interfaces seamlessly with gas-fired or oil-fired furnaces, boilers, and water heaters.
- Enhanced Safety Logic: Integrated interlock safety switch prevents appliance operation during venter failure or blocked flue conditions.
- Simplified Wiring: Color-coded terminal strips and inclusive 24V transformer simplify retrofitting into existing control circuits.
- Diagnostic Feedback: On-board LEDs indicate power status, call for heat, and drafting performance for faster service calls.
- Customizable Timing: Adjustable post-purge settings prevent heat exchanger stress and ensure complete flue gas clearance.
Common Questions
How do you wire a Tjernlund UC1 to a 24V thermostat?
The UC1 accepts a 24V signal through terminals R and W. Ensure the common wire is grounded correctly to the control board to prevent signal interference during the ignition sequence.
What do the LED codes on the UC1 indicate?
The LEDs track the sequence of operation: green indicates power, amber confirms the call for heat, and a second green light proves the fan prover switch is closed and the burner is cleared to fire.
Can the UC1 be used with millivolt systems?
Yes, the UC1 supports millivolt heating systems using a dry contact configuration, provided the control itself is powered by a separate 115V or 24V source.
This item is not eligible for free shipping.
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.
