Trane Tracer VV550 User Manual

CNT-SVX17G-EN 95
Appendix C: Mode Control Operation
Power-up
Zone demand
is cool
d
Cool Cool
STC occupied/unoccupied cool
STC occupied/unoccupied heat
Zone demand
is heat
d
Heat Heat
VFC (occupied or unoccupied) Cool Cool
Flow tracking Cool Cool
b.
Output
Enabled meaning Disabled meaning
Air valve Control can use air valve Air valve is closed
Reheat Control can use reheat Reheat is Off
Fan Control can run fan Fan is Off
Ventilation
Requirements
(Vent req)
Ventilation requirements are enforced
Ventilation requirements are
wa
ived (air valve may close)
c. When communicated application mode is equal to HVAC_TEST, or communicated application mode is equal to HVAC_AUTO
and communicated heat/cool mode is equal to HVAC_TEST, nvoUnitStatus.mode reports HVAC_TEST. The controller
otherwise treats HVAC_TEST the same as HVAC_AUTO for communicated application mode and communicated heat/cool
mode.
d.Zone demand is heat when the space temperature < heat setpoint. Zone demand is cool when the space temperature > cool
setpoint AND space temperature > heat setpoint + 0.5°F.
e. Emergency override leaves nvoHeatCool and nvoUnitStatus.mode as is. Just like Tracer
®
ZN510/520.
f. A flow override whether initiated by nviFlowOverride or by star or double star on the zone sensor thumbwheel reports test.
Table 62. Space temperature control VAV unit operation (continued)
nvi Applic
Mode
nvi Heat Cool
nvoHeatCool
a, c
nvoUnitStatus.
mode
nvoEffect
Occup
Output
b
Operation
Temp control
sequence
Table 63. Ventilation flow control and flow tracking VAV unit operation
nviApplicMode nviHeatCool
nvoHeatCool
nvoUnitStatus.mo
de
nvoEffectOccup Outputs
a
Operation
Auto not valid (any
e
numeration not
listed)
Auto not valid (any
enumeration not
listed)
Cool
Unoccupied
Occupied
Bypass
Standby
Air valve
Reheat
Fan
Enabled
Enabled
b
Not present
Off Off
Unoccupied
Occupied
Bypass
Standby
Air valve
Reheat
Fan
Disabled
Disabled
b
Not present
Off Don’t care Off
Unoccupied
Occupied
Bypass
Standby
Air valve
Reheat
Fan
Disabled
Disabled
b
Not present
a.
Output Enabled meaning
Disabled
meaning
Air valve Control can use air valve Air valve is closed
Reheat Control can use reheat Reheat is Off
Fan Control can run fan Fan is Off

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English