Viconics VT8300 Low Voltage Application Guide Instrukcja Użytkownika Pobierz pdf (Strona 53)

Fan Coil Unit Controller SeriesApplication Guide

028-0444-01 www.viconics.com | sales@viconics.com February 2015

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VT8300

BO2 - Fan L

BO3 - Fan M

BO4 - Fan H

RC (24 Vac)

C (Common)

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 120 volts

SC1300

FAN HI

FAN MED

FAN LO

COMM ON

High Voltage Fan

Power supply

120 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 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.

• 3 universal inputs can be used and conﬁgured for advanced

functionality as required by the application.

• Universal input can be conﬁgured for changeover sensor.

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