Pelican TC Series - Variable Temperature and Air Volume (VVT)

SUPPLY AIR
TO ZONES
ZONE COORDINATOR
ANTENNA
ZONE A
THERMOSTAT
ZONE B
THERMOSTAT
ZONE DAMPER
ACTUATOR
ZONE C
THERMOSTAT
SUPPLY AIR
TO ZONE A
SUPPLY AIR
TO ZONE B
SUPPLY AIR
TO ZONE C
ZONE DAMPER
ACTUATOR
ZONE
REHEAT
DISCHARGE TEMP
ZONE DAMPER
ACTUATOR
DISCHARGE TEMP
LIMITED
WIRING
MODULE
PELICAN
PEARL
PELICAN
TA1
LIMITED
WIRING
MODULE
Variable Temperature and Air Volume (VVT)
A variable temperature and air volume (VVT) system
typically consists of a single air handler that provides
heating, cooling, and ventilation to multiple zones. To
maintain supply duct static pressure, a bypass damper
is usually installed between the supply and return ducts
and is modulated accordingly. Each zone has a local
damper controlled by a Pelican thermostat, which opens
and closes to regulate airflow into the respective space.
A Pelican TA1 is generally added to the thermostat for
discharge temperature monitoring and damper proving.
A Pelican PEARL is typically added to the thermostat for
modulating damper control. In these applications, a
zone reheat is rare, but if available, it can be controlled
by the Pelican thermostat.
Requirements for this Installation
Each zone will need its own Pelican thermostat to
control its zone damper actuator and, if applicable, the
zone reheat. The central air handler will need a Pelican
zone coordinator; refer to the zone coordinator
installation guide: “Planning - Different Mechanical
Systems - Variable Temperature and Air Volume (VVT).”
For more details on wiring the zone thermostat and
accessories to each control point, follow the wiring
diagrams starting on page 18 of this installation manual.
RETURN AIR
FROM ZONES
OUTSIDE AIR EXHAUST AIR
COOLING COIL
SUPPLY FAN
RETURN
DAMPER
BYPASS DAMPER
HEATING COIL
OUTSIDE TEMP
SUPPLY TEMP
RETURN TEMP
DUCT STATIC
PRESSURE
AMBIENT PRESSURE
OUTSIDE
DAMPER
ZONE
COORDINATOR
SUB-BASE
Planning - Different Mechanical Systems - Variable Temperature and Air Volume (VVT)
SUPPLY AIR
TO ZONES
8