Viconics VT8300 Series, Application Manual

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Viconics Technologies Inc. www.viconics.com sales@viconics.com
028-0444-06 November 2018
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VT8300
BO2 - Fan L
BO3 - Fan M
BO4 - Fan H
RC (24 V
ac)
C (Common)
RH
BO8 - Aux Heat
UO11
- Analog Heat
UO12
- Analog Cool
BACnet
+
BACnet
-
BACnet REF UI 16 UI 17 Common UI 19 UI 20 - RS Common UI22 - SS
Mix Voltage 240 volts
SC2300
FAN HI
FAN MED
FAN LO
COMM ON
High Voltage Fan
Power supply
240 Vac
COOLING VALVE
0-10v 24v Com.
HEATING VALVE
0-10v 24v Com.
Sequence of Operation and Wiring
Occupied Mode
Setpoints revert to those defined by occupied cooling and
heating. The changeover sensor sends supply air temperature to
controller.
Stand-by Mode (only available when PIR motion detector
sensor is used)
Setpoints revert to those defined by stand-by cooling and
heating.
Unoccupied Mode
Setpoints revert to those defined by unoccupied heating and
cooling.
Occupied Override Mode
System reverts to occupied mode for duration determined by
“ToccTime” parameter.
On Call for Cool
Cooling valve opens to maintain room temperature. Heating valve
closes. Dehumidification enabled.
On Call for Heat
Heating valve opens to maintain room temperature. Cooling valve
closes. Dehumidification disabled.
On Demand for Dehumidification
Dehumidification is achieved via cooling coil using heating coil
for reheat if necessary.
Dehumidification only allowed in COOL mode, or if cooling is
enabled in AUTO mode.
Dehumidification disabled if room temperature falls below low
ambient lockout temperature, which is cooling setpoint minus
configuration defined deadband value.
Reheat disabled if cooling demand reaches 100%.
Options
• Wireless adapter modules are available. (see Appendix B for
network wiring).
• Remote wall mount or duct sensor ready.
• Can be configured for 2-pipe systems.
• 3 universal inputs can be used and configured for advanced
functionality as required by the application.
• Universal input can be configured for changeover sensor.