Viconics VT7600 Installation Guide (First Release 1000 Series) - Manual (Page 4)

4
Wiring
Terminal identification
Multistage 1H / 1C Heat Pump
Part Number VT7656B VT7605B VT7652B VT7600B VT7652A VT7600A Part Number VT7652H VT7600H
Programmable Yes No Yes No Yes No Programmable Yes No
Top left terminal block Top left terminal block
Y2 X X X X Y2 X X
Y1 X X X X X X Y1 X X
G X X X X X X G X X
RC X X X X X X RC X X
C X X X X X X C X X
Top right terminal block Top right terminal block
RH X X X X X X RH X X
W1 X X X X X X W1 X X
W2 X X X X O/B X X
Bottom terminal block Bottom terminal block
Econo X X
Aux X X X X X X Aux X X
DI1 X X X X X X DI1 X X
DI2 X X X X X X DI2 X X
RS X X X X X X RS X X
Scom X X X X X X Scom X X
OS X X X X X X OS X X
MS X X X X X X MS X X
Screw terminal arrangement
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: Economizer 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 contacts are to be used with the digital inputs. 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.
EC AU D1 D2 RS Scom OS MS
Y2 Y1 G RC C RH W1
W2
O/B
5 pole left top connector 3 pole left top connector
8 pole bottom connector