Description
The Viessmann 7820384 Water Pressure Switch is a pressure-sensing control that monitors water pressure within a heating circuit and changes its electrical state when the sensed level reaches the designated threshold. A diaphragm responds to pressure changes for HVAC systems, transferring movement to the internal contacts and creating an electrical signal for the connected control circuit. This shifting action can prevent continued operation when pressure falls outside the permitted limits. The switch contributes to monitoring hydraulic conditions and supports keep the heating circuit within its intended pressure range.
