CNT-SVX17G-EN 93
Appendix C: Mode Control Operation
Mode control operation is described in these tables:
• Table 62; Space temperature co
ntrol VAV unit operation
• Table 63; Ventilation flow control and flow tracking VAV unit operation
Table 62. Space temperature control VAV unit operation
nvi Applic
Mode
nvi Heat Cool
nvoHeatCool
a, c
nvoUnitStatus.
mode
nvoEffect
Occup
Output
b
Operation
Temp control
sequence
Auto, test, not
v
alid (any
enumeration
not listed)
Auto, test, not
v
alid (any
enumeration
not listed)
Determined by
controller
a
or
Tes t
c
Unoccupied
Occupied
Bypass
Standby
Air valve
Reheat
Fan
Vent req
Enabled
Enabled
Enabled
Enabled
See appropriate row
be
low
Heat Heat Unoccupied
Air valve
Reheat
Fan
Vent req
Enabled
Enabled
Enabled
Disabled
STC
Unoccupied heating
Occupied
Bypass
Standby
Air valve
Reheat
Fan
Vent req
Enabled
Enabled
Enabled
Enabled
STC
Occupied heating
Morning warm-
up
Morning warm-up
Unoccupied
Occupied
Bypass
Standby
Air valve
Reheat
Fan
Vent req
Enabled
Enabled
Enabled
Disabled
STC
Morning warm-up
Cool Cool Unoccupied
Air valve
Reheat
Fan
Vent req
Enabled
Enabled
Enabled
Disabled
STC
Unoccupied cooling
Occupied
Bypass
Standby
Air valve
Reheat
Fan
Vent req
Enabled
Enabled
Enabled
Enabled
STC
Occupied cooling
Night purge Night purge
Unoccupied
Occupied
Bypass
Standby
Air valve
Reheat
Series fan
Parallel fan
Vent req
Enabled
Disabled
Enabled
Disabled
Disabled
STC
Pre-cool
Pre-cool Pre-cool
Unoccupied
Occupied
Bypass
Standby
Air valve
Reheat
Series fan
Parallel fan
Vent req
Enabled
Disabled
Enabled
Disabled
Disabled
STC
Pre-cool
Off Off
Unoccupied
Occupied
Bypass
Standby
Air valve
Reheat
Fan
Vent req
Disabled
Disabled
Disabled
Disabled
Off
Maximum heat Maximum heat
Unoccupied
Occupied
Bypass
Standby
Air valve
Reheat
Fan
Vent req
Enabled
Enabled
Enabled
Disabled
STC
Maximum heat
Heat Don’t care Heat Unoccupied
Air valve
Reheat
Fan
Vent req
Enabled
Enabled
Enabled
Disabled
STC
Unoccupied heating
Occupied
Bypass
Standby
Air valve
Reheat
Fan
Vent req
Enabled
Enabled
Enabled
Enabled
STC
Occupied heating