Viessmann Vitocal 300-G Installation And Service Instructions Manual page 29

Electrical connection
Plug
sYA
Clamps Function
211.1 Primary pump (heat pump stage 1
■
or common primary pump)
Control of well pump
■
1.
211.2 Secondary pump (heat pump stage 1)
1.
211.3 Control of instantaneous heating wa-
ter heater, stage 1
1.
r
211.4
3-way diverter valve "central
r M
heating/DHW heating"
Circulation pump for cylinder heating
Cylinder loading pump
211.5 Control of natural cooling function
NC
(cont.)
Explanation
Connection values
Output: 200 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
In systems that do not have a heating water buffer
■
cylinder, no other heating circuit pump is required:
See terminal 212.2.
Connect a temperature limiter to restrict the maximum
■
temperature for underfloor heating circuits (if instal-
led) in series.
Connection values
Output: 140 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Note
Connected at the factory for type BWC 301.B
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connection values
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Note
With type BWC 301.B, the circulation pump for cylinder
heating is connected at the factory.
NC/AC-Box or on-site components for NC/AC cooling
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Installation sequence
29