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The ZoneFirst 4PDR Relay is a specialized 24Vac 4PDT relay engineered for multi-purpose HVACR control and complex zoning logic
this valve uses a hydraulically-operated thermostat to precisely mix cold and hot water
240V inductive load capacity ensures compatibility with commercial AHUs and RTUs
gas valve operation
Simplified testing: Features a magnetic test switch option for streamlined field verification
Reznor 126170 Freezstat 30067439-890 The ZoneFirst 4PDR Relay isThe Reznor 126170 Freezstat is a heavy duty, field mounted freeze protection thermostat designed to prevent coil freeze up in commercial and industrial HVAC systems. This genuine Reznor OEM replacement part (model A19AAF 12C) features a wide temperature range of 25F to 225F, making it versatile enough for use as an outside air controller or a high ambient limit switch. The 10 foot capillary tube allows for precise sensing in blower discharge ducts,
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