Liebert H-0020S Lamp 323080-701 The Johnson Controls T-4506-203 is

The Johnson Controls T-4506-203 is a professional-grade dual temperature pneumatic thermostat engineered for high-performance HVAC control systems requiring direct acting logic

It features an integrated transient suppressing device internally bridged across the hot and neutral terminals to shield sensitive internal electronics from voltage spikes and electrical noise

this unit supports larger contactors and multiple control loads without significant voltage drop

This model uses a standard 1/4" SAE male flare connection

Always verify your manifold pressure with a manometer after installation to ensure the 5" WC setpoint matches the rating plate requirements of the specific Reznor unit heater model you are servicing

Liebert H-0020S Lamp 323080-701 The Johnson Controls T-4506-203 isThe Emerson 1F95 1277 is a high performance universal touchscreen thermostat designed for heavy duty HVACR applications. Engineered for maximum system compatibility, this unit supports single stage, multi stage (up to 2H 2C), and heat pump configurations (up to 3H 2C). For technicians managing complex dual fuel setups, the integrated Smart Fuel logic program provides seamless control between fossil fuel and electric heat sources without requiring an