This is a normally open (NO) actuator

including the HH84AA011 and HH84AA013

Ensure the end switch is making continuity when the valve reaches the fully open position

consistent flame pattern for reliable main burner ignition

ensuring the boiler control module can accurately adjust firing rates based on actual supply or return temperatures

Daikin-McQuay 111048102 Temp Sensor 321042-401 This is a normally openThe Daikin McQuay 111048102 Zone Temperature Sensor is a precision engineered control interface designed for commercial HVAC systems requiring local adjustment and override capabilities. This 10k Ohm thermistor sensor provides accurate feedback to the building automation system, ensuring tight temperature tolerances within the conditioned zone. Engineered specifically for compatibility with MicroTech II and MicroTech III controllers, the 111048102