Gram Sheet 2A: Heat Pump Control Unit Power Supply 230 V - Viessmann VITOCAL 222-G Interconnection And Wiring Manual

Connection and wiring diagram
Sheet 2a: Heat pump control unit power supply 230 V~
Fig. 2
Mains terminals, heat pump control unit
A
Heat pump control unit fuse 6.3 A (slow)
B
Heat pump control unit ON/OFF switch
C
Primary circuit flow switch
D
Primary circuit pressure switch and/or frost stat
E
Power-OFF
F
External demand
G
8
External blocking
H
Jumper
K
Relay, control circuit of full wave soft starter
L
Plug, safety chain
M
Safety high pressure switch
N
Male jack, compressor
O