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1) System Overview and Architecture
The Viconics Zoning System product is comprised of 2 thermostat types.
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The VZ7200F5x00W zoning thermostat
•
The VZ7656B1000W RTU thermostat
When combined, they deliver a simple and efficient demand based system implementation which controls
pressure dependent VAV zones with roof top units (RTU). The system is designed to work with small to
medium sized RTU staged heating and cooling equipment (2 to 20 tons).
The system can be used either in a stand-alone system mode or seamlessly integrated into Niagara AX
®
Workbench environment with the usage of a Viconics JACE communication and its associated driver.
The Viconics VZ7200F5x00W Wireless Zone thermostat family is specifically designed for local pressure
dependent VAV zone control within the Viconics zoning system product family.
The primary damper output uses a common 0 to 10 Vdc VAV actuator for control.
The product features a backlit LCD display with dedicated function menu buttons for simple user operation.
Accurate temperature control is achieved due to the product’s PI proportional control algorithm, which
virtually eliminates temperature offset associated with traditional, differential-based thermostats.
The Zone thermostats are also compatible with the new Viconics PIR cover accessories. Thermostat is
equipped with a PIR cover which provides advanced active occupancy logic. The system will automatically
switch occupancy levels from occupied to stand-by and unoccupied as required when activity is detected or
not detected by the unit. This advanced occupancy functionality provides valuable energy savings during
occupied hours without sacrificing occupant comfort. All zone thermostats can be ordered with or without a
factory installed PIR cover.
The following hardware is required for operation of the zone thermostats but not included:
•
24 Vac power supply. Dedicated to a single zone or many zones
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An analog 0 to 10 Vdc pressure dependent actuator
•
Terminal reheat if required by the design
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Proper wiring of all components as per the installation manual
•
Proper network wires pulled through all devices communication connections
The Viconics
VZ7656B1000W Wireless Roof Top Unit (RTU) thermostat
is specifically designed for
equipment control based on the zone demands.
The RTU thermostat has been designed for single stage or multi-stage control of heating and cooling
equipment such as rooftop and self-contained units used in zoning systems.
The product also features a backlit LCD display with dedicated function menu buttons for simple operation.
Accurate temperature control is achieved through to the product’s PI proportional control algorithm, which
virtually eliminates temperature offset associated with traditional, differential-based thermostats.
The thermostat also contains extra digital inputs, which can be set by the user to monitor filter status or can
be used as a general purpose service indicator. All models contain a SPST auxiliary switch, which can be
used to control lighting or disable the RTU economizer function during unoccupied periods. It also features
a discharge air sensor input. Proportional static pressure logic (input and output) has been integrated onto
the thermostat to provide a complete single packaged unit for most small to medium size jobs.
The following hardware is required for operation of the RTU thermostats, but not included:
•
24 Vac power supply. Typically taken directly from the RTU power supply (C & RC)
•
An outdoor air sensor (Viconics S2020E1000)
•
A supply air duct sensor (Viconics S2000D1000)
•
A return air duct sensor (Viconics S2000D1000)
•
A 0 to 5 Vdc static pressure sensor and transducer
•
An analog 0 to 10 Vdc by-pass damper actuator (spring-return or not)
•
Proper wiring of all components as per the installation manual
•
Proper network wires pulled through all devices communication connections
