Viconics VT7607 BACnet Integration Guide (First Release 1000 Series) - Manual (Page 5)

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Wiring notes:
Note 1: If the same power source is used for the heating stages, install jumper across RC & RH. Maximum current is 2.0
amps.
Note 2: If auxiliary output is used to toggle occupancy of the electronic control card inside the equipment, configure the
relay parameter (Aux cont ) to the N.O. setting. A second relay can be added for additional functionality of the
occupancy output.
Note 3: Humidifier output uses a half bridge rectifier. Reference of the control signal is the common of the power supply of
the thermostat. (terminal C)
Note 4: Electromechanical contact are to be used with the digital input. Electronic triacs cannot be used as mean of
switching for the input. The switched leg to the input for the input to activate is terminal C ( common )
Note 5: The transformer of the unit provides power to the thermostat and the additional loads that will be wired to the
thermostat.
Remote humidity sensor accessories
Model no. Description
VH2020W1000 Wall mounted humidity sensor
VH2020D10000 Duct mounted humidity sensor
VH2020W1000 , remote wall mounted room humidity sensor.
This sensor can be used for:
• Remote return or room air humidity sensing with the
sensor mounted on the wall.
Fig.7– VH2020W1000
Remote wall mounted sensor
VH2020D1000,
remote duct mounted humidity sensor c/w
junction box.
This sensor can be used for:
• Remote return air humidity sensing with the sensor
mounted on the return air duct.
• Supply air humidity sensor used as a high limit
protection.
Fig.9 – VH2020D1000
Remote duct mounted humidity sensor
Wiring example of remote room humidity sensor: Wiring example of duct humidity sensor:
HL
OS
Scom
HS
DI
VT76x7 Series
Thermostat
Common
Power
0-10 Vdc
1
2
4
VH2020W1000
Remote wiring
24 Vac Power
To Thermostat
C
RC
HL
OS
Scom
HS
DI
VT76x7 Series
Thermostat
Common
Power
0-10 Vdc
1
2
4
VH2020D1000
Remote wiring
24 Vac Power
To Thermostat
C
RC
Valid for both hight limit sensor (HL) or
main remote humidity sensor (HS) connections