Viessmann Vitocrossal 300 CA3 2.5 Installation And Service Instructions Manual page 30

Installation
Electrical Connections
Legend
A 24V Mixing Valve Adaptor
B DIN Rail (in junction box)
C 24V Valve Actuator
D Valve
E 120V power to the mixing valve adaptor
24V Valve Adaptor
Rated voltage:
Rated current:
Available connections
gS M2 For heating circuit 2
gS M3 For heating circuit 3
Motor runtime for
3-way mixing valve: 10 to 255 sec, adjustable via coding
addresses "c3" in the heating circuit
2 group and "c3" in the heating
circuit 3 group.
30
(continued)
24VAC
max. 0.15 FLA
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Connecting Mixing Valve Actuators (continued)
1. Disconnect power to control.
2. Remove plug connect gS from cables BK1, BK2 and
BK3 of the 24V valve adaptor.
3. Connect BK1, BK2 and BK3 to DIN terminals for
desired valve application. Refer to the chart below.
4. Connect black wire E of the mixing valve adaptor
to an available terminal 12-14 on the DIN rail.
5. Connect valve actuator wires to the adaptor terminals
as shown in image above.
Refer to the mixing valve adaptor Installation
Instructions for additional information.
Plug DIN terminals
1 (L, N)
gSM2
2 (L)
3 (L, N)
gSM3
4 (L)