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The standard York S1-502031 model focuses on flow isolation
ensuring the fan coil unit operates within its original performance parameters for heating and cooling cycles
effectively extending the operational life of the hot water service system in demanding environments
the AFS-A air pressure sensing switch includes a 1/4" NPT female high-pressure inlet and a 1/8" NPT female low-pressure inlet
Tekmar Controls 519 Thermostat 321042-401 The standard York S1-502031 modelThe Tekmar Controls 519 Thermostat is a purpose built solution for precise radiant floor heating management in hydronic systems. This 24Vac 24Vdc one stage radiant heat thermostat utilizes advanced Pulse Width Modulation (PWM) technology to eliminate the temperature swings common in standard on off controls, ensuring consistent thermal mass stability. Engineered for versatility, it functions as a direct replacement for the legacy Tekmar 509 and
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