Trane Tracer VV550 User Manual

CNT-SVX17G-EN 55
Sequence of Operations
ASHRAE rate procedure
If no communicated CO
2
value is present, the prescribed ASHRAE rate procedure is used.
For zones performing ventilation control without CO
2
sensors, the ventilation
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 37):
• Configured ventilation setpoint;
• Configured standby-ventilation setpoint;
Communicated ventilation setpoint.
Table 37.Calculation of reported effective v
e
ntilation setpoint for zones without CO
2
inputs
Occupancy
mode
Communicated
ventilation
setpoint
Reported effective
ventilation setpoint
Description
Occupied Invalid Equal configured ventilation
setpoi
nt
Zone is occupied. The amount of outdoor air (OA)
required for ventilation should be equal to the
design maximum occupancy rate.
Occupied
standby
Invalid Equal configured standby-
ve
ntilation setpoint
Zone is probably between occupied periods. The
amount of OA for ventilation should be less than
the design maximum occupancy rate.
Any Valid Equal communicated
ve
nti
lation setpoint (limited,
configured ventilation setpoint
 communicated ventilation
setpoint  configured standby-
ventilation setpoint)
The Tracer Summit™ BAS keeps track of
occupan
cy and delivers the outdoor air required for
ventilation based on a schedule.

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English