Johnson Controls T-4002-203 Pneumatic Thermostat 30067439-890 protecting the heat exchanger and

protecting the heat exchanger and internal components from improper combustion or flue gas recirculation

The Rheem-Ruud 62-21489-01 is typically configured for specific gas types based on the internal orifice size

Hydronic Compatibility: Rated for standard water-based heating loops and glycol-mix systems often found in hydronic installations

technicians can maintain precise HVAC temperature control and optimize combustion efficiency in Reznor heating equipment

Johnson Controls T-4002-203 Pneumatic Thermostat 30067439-890 protecting the heat exchanger andThe Johnson Controls T 4002 203 is a high performance direct acting pneumatic thermostat designed for precise temperature regulation in commercial HVAC systems. This vertical mount controller features a bimetal sensing element that provides a proportional output signal to modulate valves and damper actuators. Engineered for reliability in building automation systems, the T 4002 203 operates with a 55 85F dial range and a high volume output of 400