Johnson Controls T-4000-611 Adaptor The hub allows you to

The hub allows you to thread the transformer directly into a 1/2" knockout on a junction box

"fall" refers to the drop in pressure (increase in vacuum) created by the inducer fan

extending equipment life and reducing field callbacks

it ensures seamless compatibility for field technicians servicing existing BAS or pneumatic control systems

Does this unit support 208V or 240V primary inputs

Johnson Controls T-4000-611 Adaptor The hub allows you toThe Johnson Controls T 4000 611 Adaptor is a critical pneumatic thermostat conversion kit engineered to transition legacy T 400 series dual temperature units to the modern T 4000 series. This Bakelite back adaptor is specifically designed for dual temperature vertical or horizontal instruments, featuring two pipehead adaptors to maintain seamless pneumatic integration. As a high performance HVAC pneumatic control accessory, it allows technicians to