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the Venstar VST3800 Thermostat serves as the definitive genuine OEM replacement for obsolete units including the VST1800
use the appropriate terminals to ensure the circuit opens on a drop in suction pressure
Integrated Test Switch: Enables code-required testing of the internal relay and probe circuit without manual blowdown
As a genuine Johnson Controls OEM component
a vent protector is typically recommended to keep debris and moisture out of the vent port
Honeywell VR8300C4506 Valve R-410A the Venstar VST3800 Thermostat servesThe Honeywell VR8300C4506 is a high capacity dual automatic combination gas valve designed for 24 Vac gas fired standing pilot appliances. This step opening control is engineered to manage natural gas flow in systems with capacities ranging from 30,000 BTU up to 290,000 BTU at a 1 inch pressure drop. It features a 3. 5" water column full rate setting with a 0. 9" w. c. step, providing a smooth transition to full burner ignition and reducing mechanical
