Viessmann Vitocrossal 300 CA3 2.5 Installation And Service Instructions Manual page 23

Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Electrical Connections
Top
Bottom
Legend
B Push-in button
C DIN rail (typical)
D Terminal insertion point
(continued)
Main power supply connections
The main power supply terminals are a push-in design. To
install or release a wire from the terminal push the orange
button B.
The main power supply terminal will accept only one
connection L, N or G. Each terminal is designated by color:
Grey - Line
Blue - Neutral
Green / Yellow - Ground
Refer to page 33 for power supply connection details.
Internal control fuse F3
When fuse F3 requires replacement, (refer to the separate
wiring diagram) the fuse can be accessed as shown.
1. Flip down the front portion of the DIN rail mounted
fuse block.
2. Flip down the front side cover of the DIN rail mounted
fuse block.
3. Replace fuse.
4. Return the DIN rail mounted fuse block back to the
original position.
Refer to wiring schematic for fuse F3 location.
Installation
23