Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual page 33

Connection of Boiler Return Mixing Valve or Isolation/Modulating Valve
(CM2 only)
10 11 12
1 120V or 24V Valve Adaptor
2 Junction box
3 120V L out power supply
120V Valve Adaptor
Rated voltage: 120 VAC
Rated current: max. 0.1 FLA
Recommended connection
wire size: AWG 14
24V Valve Adaptor
Rated voltage: 24 VAC
Rated current: max. 0.15 FLA
Recommended connection
wire size: AWG 14
Operating time:
5 to 199 sec. selected via coding
address "40".
1 120V Valve Adaptor
2 120V valve actuator
Installation
1 24V Valve Adaptor
2 24V valve actuator
1. Disconnect power to control.
2. Install 120V or 24V Valve
Adaptor on DIN rail inside
connection enclosure.
3. Insert the plug gS into socket
gS on the control.
4. Fasten cable with tie
(see page.21).
5. Connect black wire of the
adaptor to connection 120V L
out the DIN rail
- Terminals 10,11 or 12.
6. Connect valve actuator wires
to the adaptor terminals as
shown on figures.
33