Viconics VBZS Engineering Guide Specifications - Manual (Page 7)

Packaged unit controller model dependent specifications:
VZ7656R1000B: Up to two heating and two cool stages, single fan speed output, 0-10Vdc output for
bypass damper or variable-frequency drive (VFD).
VZ7656F1000B: Modulating 0-10Vdc heating / 2 cooling stages, single fan speed output, 0-10Vdc output
for bypass damper or variable-frequency drive (VFD).
Specifications
The VZ7656F1000B shall have a configurable minimum supply temperature between 50 °F to 72
°F (10 °C to 22 °C) to be maintained during occupied mode. This parameter shall only be active
when the controller is in occupied mode, in heating mode and if the outdoor temperature is low
enough to prevent heating stage lockout.
VZ7656E1000B: Up to two heating and two cooling stages, single fan speed output, 0-10Vdc output for
economizer actuator, 0-10Vdc output for bypass damper or variable frequency drive (VFD), indoor air
quality sequence (IAQ).
Specifications
The VZ7656E1000B shall have capable of controlling the economizer for free cooling depending
on the outside air temperature.
If a fresh air station is used to measure CFM, the VZ7656E1000B shall have a 0-5 Vdc analog
input for a fresh air station transmitter to enable the Min/Max CFM control logic.
If CO2 levels must be maintained, the VZ7656E1000B can receive CO2 demands from the
VZ7260x5x00B controls and control the economizer to maintain a minimum and maximum C02
range. The default minimum and maximum CO2 set points shall be 800ppm and 1200ppm
respectively.
The Heat Pump Controller shall be:
VZ7656H1000B: 2 stage compressor with reversing valve and auxiliary heat, single fan speed output, 0-
10Vdc output for bypass damper or variable-frequency drive (VFD)