ZoneFirst 4PDR Relay and the signal for the

and the signal for the indicator light to the P terminal

if the failure is caused by a seized or scaled plunger that can no longer move to the mixing position

Does the spark gap need adjustment upon installation

Featuring a 90°F to 150°F adjustable temperature range

ZoneFirst 4PDR Relay and the signal for theThe 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