Viconics VZ7260(X) VZ7656(X) BACnet Installation Manual - Manual (Page 2)

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VZ7260 Product Overview
The Viconics VZ7260 PI controller family is specifically designed for local
pressure dependent VAV zone control within Viconics Zoning System
product family.
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
controllers.
The controllers are used in conjunction with the Viconics VZ76561000B
Roof Top Controller for total system operation of each zones and the RTU.
A local BACnet RS485 MS-TP communication bus between all devices insures proper communication and data
exchange of all required information between the Zone controllers and RTU controller. They can be seamlessly
integrated into any 3
rd
party BACnet supervision system.
The Zone controllers are also compatible with the new Viconics PIR cover accessories. Controllers equipped with a
PIR cover provide advanced active occupancy logic, which will automatically switch occupancy levels from
occupied to stand-by as required by local activity being present or not. This advanced occupancy functionality
provides advantageous energy savings during occupied hours without sacrificing occupant comfort. All Zone
controllers can be ordered with or without a factory installed PIR cover (see ordering notes below).
VZ7656 Product Overview
The Viconics VZ7656 controller is specifically designed for RTU control of the Viconics
Zoning System product family.
The RTU controller is 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 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 controllers.
The controller also contains extra digital inputs, which can be set by the user to monitor
filter status or 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
controller to provide a complete single packaged unit for most small to medium size jobs.
The controllers are used in conjunction with the Viconics VZ7260 Zone controllers for total system operation of
each zones and the RTU.
A local BACnet RS485 MS-TP communication bus between all devices insures proper communication and data
exchange of all required information between the Zone controllers and the RTU controllers. They can be
seamlessly integrated into any 3
rd
party BACnet supervision system.
Fig.2 -VZ7656BController