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if your application requires a low limit or circulator hold-off for domestic priority
then those pairs in parallel) to maintain the required 10k ohm resistance for the thermostat logic
The V47AE-13 is a direct-acting valve
ensuring the heat exchanger operates at peak performance
Siemens Building Technology QAC22 Sensor 326058-758 if your application requires aThe Siemens Building Technology QAC22 Sensor is a precision passive outdoor temperature sensor engineered for weather compensated control in high performance HVACR systems. Utilizing an LG Ni 1000 ohm sensing element (Ni RTD, 1k Ohm @ 32F), this unit provides a highly stable output signal across a wide operating range of 58 F to 158 F ( 50 C to 70 C). Designed for standard building automation systems, it accurately monitors outdoor air temperature