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Thermostat for Modulating Heat Applications

Product Number: VT7225 Series

Thermostat for Modulating Heat Applications

The VT7225 series controllers are microcomputer-based, proportional and integral (PI) devices with one analog 0 to 10 Vdc output, one 8 Vdc and one 24 Vac proportioning pulsed output.
The analog 0 to 10 Vdc modulating output can control the room or supply temperature by modulating directly a 0 to 10 Vdc SCR power controller.


The Vdc and Vac pulsed outputs can control the room or supply temperature by modulating directly 4-32 Vdc triggered solid state relays (SSR’s) using a time proportioning control algorithm on a 1 second time cycle.

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The VT7225 has the following features:

  • 0 to 10 VDC modulating output
  • VDC pulsed modulating output
  • VAC pulsed modulating output
  • Night setback digital input
  • Room or supply control applications
VT7225 Product Documentation 
Document type
Download files
Installation Guide
PDF download
 User Interface Guide PDF download