Connection Of Electrical Components - Viessmann Vitocal 300-G Installation And Service Instructions Manual

Installation sequence
Positioning of all terminals
A Terminals at PCB 1 and 2
B Primary pump (max. 200 W,
already integrated and connected
for type BWC/WWC)
C Contactor relay (on site)
D Protective motor switch (on site)
E Well pump

Connection of electrical components

Temperature limiter (maximum limit for underfloor heating
systems)
Note
The temperature limiter must be con-
nected in series with the circulation
pump.
Temperature limiter terminals
Protection for the
following heating
circuit
A1 No
A1 Yes
M2 Yes
M3 Yes
78
(cont.)
Temperature limiter (maximum limiter
for underfloor heating systems)
With heating Temperature limiter terminal
water buffer cy-
linder
2X8.7
2X7.9
2X8.11
Plug sÖ (on the extension kit for one
heating circuit with mixer M3)