Tjernlund Products WHKE Control Interlock
For contractors interlocking millivolt-controlled water heaters with a power venting system, the Tjernlund WHKE Control Interlock is the industry standard for ensuring safe and reliable operation. This kit is specifically designed to interface between gas-fired appliances and Tjernlund UC1 Universal Control, MAC1E, or MAC4E auxiliary modules. By sensing gas flow through a vertical-mount gas pressure switch, the WHKE signals the inducer to activate immediately upon a call for heat via the A-B dry contacts. The inclusion of the JA1 thermocouple junction adapter allows for seamless integration with 30-millivolt systems without modifying the original pilot assembly. Techs should note that the integrated linear limit spill switch acts as a critical safety bypass, disrupting the millivolt safety circuit to disable the burner if flue gas spillage is detected at the draft hood. This millivolt water heater interlock kit provides a hardwired, fail-safe solution that prevents the burner from firing if the power venter fails to establish proper draft.
Key Benefits for the Professional Installer:- Universal Compatibility: Engineered for seamless integration with millivolt gas valves and UC1 universal controls.
- Enhanced Safety: Features a manual reset linear limit switch to prevent operation during venting malfunctions.
- Simplified Wiring: Color-coded leads and 1/4" compression fittings facilitate fast installation in tight mechanical rooms.
- Reliable Sensing: The diaphragm-actuated gas pressure switch ensures the power venter cycles only when needed.
- Complete Kit: Includes the JA1 thermocouple adapter and aluminum bleed tubing required for a professional-grade setup.
Can I use one WHKE kit for multiple water heaters?
No. Each millivolt appliance requires its own dedicated WHKE kit to ensure the safety limit circuit and gas pressure sensing are isolated and effective for each burner.
What happens if the power venter fails to start?
The gas pressure switch will not see the pressure change required to close the dry contacts, or the fan prover on the UC1 will not clear the burner to fire, preventing unsafe combustion.
Is the JA1 adapter required for all installations?
The JA1 is used for 30-millivolt heaters. For 750-millivolt (power pile) systems, you should wire the linear limit spill switch in series with the water heater's ECO safety circuit instead.
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.
Tjernlund Products WHKE Control Interlock
For contractors interlocking millivolt-controlled water heaters with a power venting system, the Tjernlund WHKE Control Interlock is the industry standard for ensuring safe and reliable operation. This kit is specifically designed to interface between gas-fired appliances and Tjernlund UC1 Universal Control, MAC1E, or MAC4E auxiliary modules. By sensing gas flow through a vertical-mount gas pressure switch, the WHKE signals the inducer to activate immediately upon a call for heat via the A-B dry contacts. The inclusion of the JA1 thermocouple junction adapter allows for seamless integration with 30-millivolt systems without modifying the original pilot assembly. Techs should note that the integrated linear limit spill switch acts as a critical safety bypass, disrupting the millivolt safety circuit to disable the burner if flue gas spillage is detected at the draft hood. This millivolt water heater interlock kit provides a hardwired, fail-safe solution that prevents the burner from firing if the power venter fails to establish proper draft.
Key Benefits for the Professional Installer:- Universal Compatibility: Engineered for seamless integration with millivolt gas valves and UC1 universal controls.
- Enhanced Safety: Features a manual reset linear limit switch to prevent operation during venting malfunctions.
- Simplified Wiring: Color-coded leads and 1/4" compression fittings facilitate fast installation in tight mechanical rooms.
- Reliable Sensing: The diaphragm-actuated gas pressure switch ensures the power venter cycles only when needed.
- Complete Kit: Includes the JA1 thermocouple adapter and aluminum bleed tubing required for a professional-grade setup.
Can I use one WHKE kit for multiple water heaters?
No. Each millivolt appliance requires its own dedicated WHKE kit to ensure the safety limit circuit and gas pressure sensing are isolated and effective for each burner.
What happens if the power venter fails to start?
The gas pressure switch will not see the pressure change required to close the dry contacts, or the fan prover on the UC1 will not clear the burner to fire, preventing unsafe combustion.
Is the JA1 adapter required for all installations?
The JA1 is used for 30-millivolt heaters. For 750-millivolt (power pile) systems, you should wire the linear limit spill switch in series with the water heater's ECO safety circuit instead.
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
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Description
For contractors interlocking millivolt-controlled water heaters with a power venting system, the Tjernlund WHKE Control Interlock is the industry standard for ensuring safe and reliable operation. This kit is specifically designed to interface between gas-fired appliances and Tjernlund UC1 Universal Control, MAC1E, or MAC4E auxiliary modules. By sensing gas flow through a vertical-mount gas pressure switch, the WHKE signals the inducer to activate immediately upon a call for heat via the A-B dry contacts. The inclusion of the JA1 thermocouple junction adapter allows for seamless integration with 30-millivolt systems without modifying the original pilot assembly. Techs should note that the integrated linear limit spill switch acts as a critical safety bypass, disrupting the millivolt safety circuit to disable the burner if flue gas spillage is detected at the draft hood. This millivolt water heater interlock kit provides a hardwired, fail-safe solution that prevents the burner from firing if the power venter fails to establish proper draft.
Key Benefits for the Professional Installer:- Universal Compatibility: Engineered for seamless integration with millivolt gas valves and UC1 universal controls.
- Enhanced Safety: Features a manual reset linear limit switch to prevent operation during venting malfunctions.
- Simplified Wiring: Color-coded leads and 1/4" compression fittings facilitate fast installation in tight mechanical rooms.
- Reliable Sensing: The diaphragm-actuated gas pressure switch ensures the power venter cycles only when needed.
- Complete Kit: Includes the JA1 thermocouple adapter and aluminum bleed tubing required for a professional-grade setup.
Can I use one WHKE kit for multiple water heaters?
No. Each millivolt appliance requires its own dedicated WHKE kit to ensure the safety limit circuit and gas pressure sensing are isolated and effective for each burner.
What happens if the power venter fails to start?
The gas pressure switch will not see the pressure change required to close the dry contacts, or the fan prover on the UC1 will not clear the burner to fire, preventing unsafe combustion.
Is the JA1 adapter required for all installations?
The JA1 is used for 30-millivolt heaters. For 750-millivolt (power pile) systems, you should wire the linear limit spill switch in series with the water heater's ECO safety circuit instead.
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.
