Control Unit Accessories; Contactor Relay - Viessmann VITOCAL 300-G Technical Manual

Heat pump control unit
Connection values of the function components
Components
Primary pump/well pump
Secondary pump
Instantaneous heating water heater control, stage 1
Circulation pump for cylinder heating (on the heating
water side) or three-way diverter valve, heating/DHW
heating
NC signal control ("natural cooling")
Circulation pump, separate cooling circuit
and
AC signal control (active cooling)
Heating circuit pump A1
DHW circulation pump
External heat source control
Central fault message
Primary pump, heat pump stage 2
Secondary pump, heat pump stage 2
Instantaneous heating water heater control, stage 2
Circulation pump for cylinder heating (on the heating
water side) or three-way diverter valve, central/DHW
heating for heat pump stage 2
Cylinder primary pump (DHW side)
Circulation pump for DHW reheating
or
Control of immersion heater EHE
Heating circuit pump M2
4
Total current

4.2 Control unit accessories

Contactor relay

Part no. 7814 681
Contactor in small casing.
With 4 N/C and 4 N/O contacts.
With terminal strip for earth conductors.
1 4
5
9 5
VIESMANN
62
(cont.)
Connected load [W]
200
130
10
130
10
10
100
50
zero volt contact
zero volt contact
200
130
10
130
130
100
100
Voltage [V]
230
230
230
230
230
230
230
230
250
250
230
230
230
230
230
230
230
Specification
Coil voltage
Rated current (I )
th
Max. switching current
[A]
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
4(2)
max. 5(3) A
230 V~/50 Hz
AC1 16 A
AC3 9 A
VITOCAL 300-G