Trane Tracer VV550 Installation, Operation And Maintenance Manual page 53

Table 35.Data required for each method of ventilation control (continued)
Variable
Reported space CO
2
Reported ventilation
status
Configured space CO
2
high limit
Configured space CO
2
low limit
Configured ventilation
setpoint
Configured standby
ventilation setpoint
CNT-SVX17G-EN
Description
Space CO concentration: Not used for control, but passed to
2
the system for monitoring.
Ventilation ratio
Effective ventilation setpoint
Active minimum flow setpoint
Minimum flow setpoint source
CO high limit: CO concentration in the space at which
2 2
modulation of the ventilation setpoint ends.
CO low limit: CO concentration in the space at which
2 2
modulation of the ventilation setpoint begins.
Occupied ventilation setpoint: Maximum OA required to
ventilate the zone during occupied periods and the high OA limit
for CO DCV control. Default is zero, which disables ventilation.
2
Standby ventilation setpoint: OA required to ventilate the zone
during periods of occupied standby and the low OA limit for CO
DCV control. Default is zero, which disables ventilation.
Required ratio of OA to
primary air to meet zone
ventilation needs
Arbitrated final value of the
zone ventilation requirement
Sequence of Operations
Method
CO -based Prescribed
2
DCV ASHRAE
setpoint rate
Mandatory Do not care
Mandatory Mandatory
Mandatory Do not care
Mandatory Do not care
Mandatory Mandatory
Mandatory Mandatory
2
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