Siemens Building Technology 192-840 Retrostat Kit R-407C this thermal expansion valve is

this thermal expansion valve is designed to handle the flow requirements of standard heat pump cycles and air conditioning units within its tonnage rating

Mechanical contractors typically replace the burner gasket during annual PM (preventative maintenance) or whenever the burner assembly is removed for inspection

always verify your specific unit heater wiring diagram

the 327266-752 optimizes airflow dynamics

Siemens Building Technology 192-840 Retrostat Kit R-407C this thermal expansion valve isThe Siemens Building Technology 192 840 Retrostat Kit provides a professional grade solution for upgrading legacy pneumatic room thermostats to the high performance Powerstar TH192 standard. This direct acting, two pipe, single setpoint kit is engineered to replace existing units from manufacturers like Johnson Controls, Honeywell, Barber Colman, and Robertshaw. The unit features a highly sensitive bi metal thermostatic element and a flapper nozzle