Viconics VT7000 Series PIR Application Guide - Manual (Page 9)

9
• VT760x Networked application using 2 levels of occupancy with a VI-PIR accessory cover
Non-Scheduling models
Set-up and Configuration
Thermostat used Non-Scheduling VT760xX5000X
PIR used COV-PIR-RTU-C-5000 accessory cover
Unoccupied timer value 1.5 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 1.5 hours unless a Network Occupied or Unoccupied command is received.
If a Network Occupied Command is received, the PIR function is not used and the device will remain occupied independently
of movements or motion detected.
If a Network Unoccupied Command is received, the PIR function is not used and the device will remain unoccupied
independently of movements or motion detected.
During a Network Unoccupied Command period, a local override can me made by a user by using the “Override Schedule
Y/N?” question prompt In the menu. The override duration will be equivalent to the value set in the “ToccTime” configuration
parameter. The PIR function is not used during the local override period.
The PIR function is only used if the local thermostat receives a Network Local Occupancy Command as dictated by the
remote BAS front end schedule.
During the Network Local Occupancy Command period as dictated by the local schedule; as soon as the PIR device detects
a movement or motion, the occupancy status switches to occupied mode and the occupied setpoints are used.
if no movement is detected after the 1.5 hour timer expires, the thermostat occupancy will switch to unoccupied mode.
Anytime the PIR device detects local motion during the Network Local Occupancy Command period as dictated by the remote
BAS front end schedule, 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 during the Network Local Occupancy Command period as
dictated by the remote BAS front end schedule, the occupancy status switches to occupied mode and the occupied setpoints
are used.
If a Network Occupied Command is received, the PIR function is not used and the device will remain occupied independently
of movements or motion detected.
If a Network Unoccupied Command is received, the PIR function is not used and the device will remain unoccupied
independently of movements or motion detected.
Ceiling mounted
AC or HP unit
BACnet, LON or
Wireless communication
Occupied
U noccupîed
Tim e
N etwork occupancy
com m and = Local Occupancy
Tim e
U noccupied Time E lapsed
= Unoccupied Mode
Last Movem ent Detected
by PIR A ctivity
U noccupied Time
= 1.5 Hours
U noccupied Time
= 1.5 Hours
U noccupied Time E lapsed
= Unoccupied Mode
Last Movem ent Detected
by PIR A ctivity
Last Movem ent Detected
by PIR A ctivity
N etwork occupancy
com m and = Unoccupied
N etwork occupancy
com m and = Occupied