Connection Of Accessories; Closing The Control Unit Enclosure - Viessmann Vitoladens 300-C Installation And Service Instructions Manual

Installation sequence
Electrical connections

Connection of accessories

A
E
Fig. 23
Boiler control unit
A
Extension kit, mixer M2
B
Extension kit, mixer M3
C
If the current flowing to the connected working parts
(e.g. circulation pumps) is higher than the fuse rating
of the relevant accessory, only use the output con-
cerned to control an on-site relay.

Closing the control unit enclosure

Fig. 24
28
(cont.)
B C D
EA1 extension and/or solar control module, type
D
SM1
E ON/OFF switch (on site)
Accessories
Mixer extension kit
EA1 extension
Solar control module, type SM1
Internal fuse
protection
2 A
2 A
2 A