Constructed with oil and heat-resistant synthetic polymers and reinforced with high-tensile cord members

preventing nuisance lockouts and ensuring the furnace or boiler cycles correctly during high-demand periods

cracked pressure switch tubing

the capacitance must remain at exactly 7

it is recommended to install a 3-amp inline fuse on the secondary side to protect the coil from shorts in the field wiring

IO Hvac Controls iO-TWIN-TR Twinning Kit 321042-401 Constructed with oil and heat-resistantThe iO TWIN TR Twinning Kit provides a reliable solution for technicians needing to synchronize two separate HVAC units from a single thermostat. Engineered for versatility, this universal twinning kit is compatible with single stage, multi stage, and heat pump equipment, whether configured on common or independent ductwork. The internal circuitry ensures seamless communication between units, and the system can be expanded to manage up to four units