as well as the digital 206A-406A series and Low NOx 207A-407A units

Engineered to replace obsolete part numbers RLY1002 and 100167473

and SS263 regulator models

Thermal Stability: Engineered to withstand the high ambient temperatures common in condensed mechanical compartments

ensuring proper sequencing of heating

ZoneFirst 4PDR Relay as well as the digitalThe ZoneFirst 4PDR Relay is a specialized 24Vac 4PDT relay engineered for multi purpose HVACR control and complex zoning logic. This unit features a 4 Pole Double Throw configuration, allowing a single 24V signal to switch four independent sets of contacts. It is most commonly deployed as a slave damper control relay, enabling a technician to drive up to four separate dampers from one zone on a control panel or a single switch. The 4PDR utilizes a