Viconics VT8300 Low Voltage Application Guide - Manual (Page 43)

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43 Fan Coil Unit Controller Series Application Guide
Viconics Technologies Inc. | 9245 Langelier Blvd. | St.-Leonard | Quebec | Canada | H1P 3K9 | Tel: (514) 321-5660 | Fax: (514) 321-4150
028-0444-01 www.viconics.com | [email protected] February 2015
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VT8300
BO2 - Fan L BO3 - Fan M BO4 - Fan H RC (24 V
ac)
C (Common)
RH
BO8
- Aux Heat
UO9
- Close Cool V
UO10
- Close Heat V
UO11
- Open Cool V
UO12
- Open Heat V
BACnet + BACnet - BACnet REF UI 16 UI 17 Common UI 19 UI 20 - RS Common UI22 - SS
Mod. & PWM Control
HEATING VALVE
0-10 v 24 v Com.
COMM ON
24 VAC
24 Vac Transformer
PWM DUCT HEATER
SOLID STATE RELAY
S L
10 k-2 CO SENSOR
SCOM
Sequence of Operation and Wiring
Occupied Mode
During Occupied periods, the occupied heating and cooling
setpoints are used.
Stand-by Mode (only available when PIR motion detector
sensor is used)
When equipped with a PIR (Passive Infrared) accessory sensor
the Controller provides advanced active occupancy logic, which
automatically switches occupancy levels from Occupied to Stand-by
to Unoccupied when no motion is detected in the room:
•
During PIR activated stand-by periods, stand-by heating and
cooling setpoints are used.
• During PIR activated unoccupied periods, unoccupied-by
heating and cooling setpoints are used.
Unoccupied Mode
During unoccupied periods, unoccupied heating and cooling
setpoints are used.
Occupied Override Mode
The Controller reverts back to Occupied mode as specified by a
configuration timer when a local override is requested at Controller.
On Call for Heat
If supply water temperature is less than 75°F (23.9°C), the valve
modulates from closed to open according to demand. If water
supply temperature is greater than 77°F (25°C), valve remains
closed.
On Call for Cool
If supply water temperature is higher than 77°F (25°C), valve
modulates from closed to open according to demand. If water
supply temperature is less than 75°F (23.9°C), valve remains
closed. The duct heater operates as a second step.
Options
• Wireless adapter modules for BACnet models are available.
(see Appendix B for network wiring).
• Remote wall mounted sensor or return air temperature
sensor can be used instead of internal temperature sensor of
Controller.
• 3 universal inputs can be used and configured for advanced
functionality as required by the application.