1 | 028-0485-00
November 2017
Features
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0 to 10 VDC modulating output
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VDC pulsed modulating output
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VAC pulsed modulating output
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Night setback digital input
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Room or supply control applications
Description
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.
VT7225 Series
Installation Guide
F o r M o d u l a t i n g E l e c t r i c H e a t A p p l i c a t i o n s
N o v e m b e r 2 0 1 7
