Carrier 50PG20-28 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 81

CCN BUS
BUiLDiNG SUPERVISOR
NETWORK
OPTIONS
REMOTE AUTODtAL j
CCN SITE -- GATEWAY --
NON HvAcCARRtER L_
EQUIPMENT
COMFORT
CONTROLLER
J
ROOFTOP
UNIT
ROOFTOP
UNIT
_ ROOFTOP j._
UNIT
HEATING/COOLING UNITS
LEGEND
CCN -- Carrier Comfort Network@
CL -- ComfortLink
TM
ControIs
DAV -- Digital Air Volume
HVAC -- Heating, Ventilation,
and Air Conditioning
TCU -- Terminal Control Unit
TO
I _ ADDITIONAL
MINALS
J DAV FAN
I / _. ] I POWERED
I ,,Z / J _ ] J MIXING
I/" (_.p/ BOX
AIR DISTRIBUTiON-DiGITAL AiR VOLUME CONTROL (DAV)
Fig. 28 -- CCN System Architecture
SUBCOOLER
HX
COMPRESSOR
SUBCOOLER TXV
MAIN TXV
Fig. 29 -- Subcooler Operation
8!