Electrical Equipment - Viessmann Vitocal 300-A Connection And Wiring Diagram

Connection and wiring diagram
Notes
■ Observe the information on electrical connections in the
installation and service instructions.
■ In the case of a power supply with power-OFF facility, the
power to the control circuit (heat pump control unit) must be
1
supplied without interruption by the power supply utility.
■ Identification of electrical equipment (in accordance with
DIN/IEC 81346-2):

Electrical equipment

B Pressure switch, temperature switch, thermal relay
F MCB/fuse, thermal relay
J Plug-in connector
K Contactors, relays
M Motor, circulation pump, motorised valve, compressor
Q Mains isolator, contactor
R Choke coil
S Control switch
T Inverter
X Terminals, plugs
4
Example: /7.5
/ = Cross-reference
7. = Sheet number
5 = Current path