Viconics VT7000 Series PIR Application Guide - Manual (Page 7)

7
Typical Applications
• VT760x Stand-alone application using 2 levels of occupancy with a VI-PIR accessory cover
Non-Scheduling models
Set-up and Configuration
Thermostat used Non-Scheduling VT760xX5000
PIR used COV-PIR-RTU-C-5000 accessory cover
Unoccupied timer value 2.0 hours
Network interface used None, stand-alone
Sequence of operation:
At initial power-up, when the thermostat 24 Vac power supply is applied; the initial occupancy of the zone will be occupied
mode for 2 hours.
If no movement is detected after the 2 hours timer expires, the thermostat occupancy will switch to unoccupied mode.
As soon as the PIR device detects a movement or motion, the occupancy status switches to occupied mode and the occupied
setpoints are used.
Anytime the PIR device detects local motion, the elapsed unoccupied timer value will be reset. If no motion is detected in the
zone for the entire unoccupied timer duration, then the room switches to unoccupied mode and the unoccupied setpoints are
used.
At anytime, if the PIR device detects a local movement or motion, the occupancy status switches to occupied mode and the
occupied setpoints are used.
Occupied
Unoccupîed
Time
Power-up
Time
Unoccupied Time Elapsed
= Unopccupied Mode Last Movement Detected
by PIR Activity
Unoccupied Time
= 2 Hours
Unoccupied Time Elapsed
= Unopccupied Mode
Unoccupied Time
= 2 Hours
Ceiling mounted
AC or HP unit