The BASO K15DA-30H Thermocouple is a professional-grade sensing component engineered for high-reliability in standing pilot ignition systems

The coil uses a white/yellow stripe (common)

Utilizing a single pole single throw (SPST) configuration

the tube must be installed with the intake holes facing the upstream air flow

Copeland Comfort Control (White Rodgers) 90-113 Relay/Trans The BASO K15DA-30H Thermocouple isThe Copeland Comfort Control (White Rodgers) 90 113 Fan Relay Transformer is a heavy duty HVAC control center designed to manage line voltage fans and pump motors in both forced air and hydronic systems. This component integrates a 120V to 24V Class II transformer with an SPDT relay, allowing high voltage equipment to be safely switched by a 24V thermostat signal. Built for field service efficiency, it mounts directly to a 4 x 4 inch junction box and