Siemens DDC 550-430 Actuator L99H008 The Viessmann 7427419 is a

The Viessmann 7427419 is a direct OEM Control Console WB1B-26 engineered specifically for the Vitodens 100-W series condensing boilers

use the 2W-B for 2-wire applications

this specialized resistive component facilitates localized heat transfer to maintain lubricant viscosity or prevent refrigerant migration in compressors

maintaining efficiency and preventing unnecessary component wear during extreme demand periods

provided there is enough clearance for the mechanical position indicator

Siemens DDC 550-430 Actuator L99H008 The Viessmann 7427419 is aThe Siemens DDC 550 430 is a high performance BACnet VAV Actuator designed for DDC terminal box controller applications. Operating on the BACnet MS TP protocol, this integrated unit provides precise, pressure independent control of VAV zone level routines. With a 44 lb in (5 Nm) nominal torque and a 90 second run time at 60 Hz, the Siemens OpenAir GDE series ensures reliable damper positioning for HVAC building automation. The on board differential