Electrical Connections - Viega Basic Heating Control Installation Manual

InstALLAtIon - CHAPtER 5

5.2 Electrical Connections

The installer should test to confirm that no voltage is present at any of the
wires. Push the control into the base and slide it down until it snaps firmly
into place.
Powered Input Connection
120 VAC PoWER
Connect the 120 VAC power supply to the Power L and Power N terminals
(1 and 2). This connection provides power to the microprocessor and display
of the control. As well, this connection provides power to the Sys Pmp
terminal (3) from the Power L terminal (1).
output Connections
systEM CIRCULAtoR PUMP ContACts (sys PMP)
The Sys Pmp output terminal (3) on the Basic Heating Control is a powered
output. When the relay in the Basic Heating Control closes, 120 VAC is
provided to the Sys Pmp terminal (3) from the Power L terminal (1). To
operate the system circulator, connect one side of the system circulator
circuit to terminal (3) and the second side of the circulator circuit to the
neutral (N) terminal (4).
VALVE ACtUAtoR
Terminals 7, 8, and 9 are powered with 24 VAC from the control. There is no
need to provide a separate 24 VAC power source for the valve actuator.
R Opn (7) is connected to the open terminal of the actuating motor and R
Cls (8) is connected to the close terminal of the actuating motor. C (9) is then
connected to the common terminal of the actuating motor.
three Position Actuator for stations (18003)
White wire is common
Green wire is open
Brown wire is close
Mixing Valve Actuator (20040)
Blue wire is common
Brown wire is clockwise rotation
Black wire is counter-clockwise rotation
(Whether clockwise is open or close will depend on the orientation of the
Mixing Valve – see valve instructions for details)
BoILER ContACt
The Boiler terminals (5 and 6) are an isolated (dry) output in the Basic
Heating Control. There is no power available on these terminals from the
control. These terminals are to be used as a switch to either make or break
the boiler circuit. When the Basic Heating Control requires the boiler to fire, it
closes the contact between terminals 5 and 6.
VIEGA 1-800-976-9819 10 PI-16015-03/09