Trane Tracer VV550 Installation, Operation And Maintenance Manual page 55

ASHRAE rate procedure
If no communicated CO
For zones performing ventilation control without CO
requirement is based on either the occupancy mode of the zone, as prescribed in
ASHRAE 62-2001, or on the communicated ventilation setpoint. The prescribed ASHRAE
rate procedure uses one of three values for the effective ventilation setpoint (see
Table
•
•
Communicated ventilation setpoint.
Table 37.Calculation of reported effective ventilation setpoint for zones without CO
Communicated
Occupancy ventilation
mode setpoint
Occupied Invalid
Occupied Invalid
standby
Any Valid
CNT-SVX17G-EN
value is present, the prescribed ASHRAE rate procedure is used.
2
37):
Configured ventilation setpoint;
Configured standby-ventilation setpoint;
Reported effective
ventilation setpoint
Equal configured ventilation
setpoint
Equal configured standby-
ventilation setpoint
Equal communicated
ventilation setpoint (limited,
configured ventilation setpoint
 communicated ventilation
setpoint  configured standby-
ventilation setpoint)
Sequence of Operations
sensors, the ventilation
2
Description
Zone is occupied. The amount of outdoor air (OA)
required for ventilation should be equal to the
design maximum occupancy rate.
Zone is probably between occupied periods. The
amount of OA for ventilation should be less than
the design maximum occupancy rate.
The Tracer Summit™ BAS keeps track of
occupancy and delivers the outdoor air required for
ventilation based on a schedule.
inputs
2
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