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normally closed component is a staple for contractors managing residential and commercial boiler zones
the S1-031-01954-000 is the authorized OEM engineered replacement for that series and fits the existing mounting footprint
making it ideal for systems requiring high-side pressure stability
What is the purpose of the manual lift stem
Johnson Controls T-4506-217 Thermostat Refrigerant normally closed component is aThe Johnson Controls T 4506 217 is a precision engineered dual temperature pneumatic thermostat designed for reverse acting control in commercial HVAC systems. This horizontal mount controller manages both day night changeover and summer winter transitions without an integrated indexing switch. Operating on a 13 to 25 psig supply pressure range, the unit is calibrated for an automatic switchover at 17 psig. Featuring a high efficiency 400 SCIM flow
US$ 192.00
US$ 550.00
US$ 657.50