Viessmann Vitocal 300-G Series Installation And Service Instructions Manual page 22

Installation sequence
Electrical connection
Plug
sYA
Terminals Function
211.1 Primary pump (heat pump stage 1
■
or shared 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 heat-
r M
■
ing/DHW heating"
Circulation pump for cylinder heat-
■
ing
211.5 Control of the natural cooling function Circuit on site
NC
Plug
sYS
Terminals Function
212.1 Control of the active cooling function
AC
212.2 Heating circuit pump for heating cir-
cuit without mixer A1/HC1
A1
22
(cont.)
Explanation
Connection values
Output: 200 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
In systems without a heating water buffer cylinder, no
■
other heating circuit pump is required (see terminal
212.2).
Connect a temperature limiter in series to restrict the
■
maximum temperature for underfloor heating circuits
(if installed).
Connection values
Output: 140 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
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
■
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Explanation
Circuit on site
Connection values
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
This pump is connected in addition to the secondary
■
pump if a heating water buffer cylinder is installed.
Connect a temperature limiter in series to restrict the
■
maximum temperature for underfloor heating circuits
(if installed).
Connection values
Output: 100 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■