Viconics VT8300 Low Voltage Application Guide - Manual (Page 21)

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21 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
Floating Control
HEATING VALVE
Close Open Com.
COOLING VALVE
Close Open Com.
COMM ON
24 VAC
FAN HI
FAN MED
FAN LO
FCU Low-voltage
TERMINAL BLOCK
Sequence of Operation and Wiring
Occupied Mode
Setpoints revert to those defined by occupied cooling and heating.
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.
On Call for Heat
Heating valve opens to maintain room temperature. Cooling valve
closes.
On Demand for Dehumidification
Dehumidification is achieved via cooling coil using heating coil for
reheat if necessary.
Dehumidification is only allowed in COOL mode, or if cooling is
enabled in AUTO mode.
Dehumidification is disabled if room temperature falls below low
ambient lockout temperature, which is the cooling setpoint minus
the configuration defined deadband value.
Reheat disabled if cooling demand reaches 100%.
Options
• Wireless adapter modules for BACnet models are available.
(see Appendix B for network wiring).
• Remote wall mount or duct sensor ready.
• Can be configured for 2-pipe systems with changeover.
• 3 universal inputs can be used and configured for advanced
functionality as required by the application.
• Universal input can be configured for changeover sensor.