Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 90

Installation sequence
Electrical connections in the heat pump control...
C External extension H1
D Zero volt contact "External demand
"
E Lag heat pump 1
Connection at contact for "External
demand "
F Zero volt contact "External demand
"
G Lag heat pump 2
Connection at contact for "External
demand "
Instantaneous heating water heater (on site)
Connection
Installation instructions
Instantaneous heating water
heater (on site).
Instantaneous heating water heater control and load circuit
L1
L2
L3
N
?
211.3
224.4
B
X2.N
A Instantaneous heating water heater
B Connection to main PCB with exten-
sion and to cross connect PCB
211.3 Stage 1
224.4 Stage 2
90
!
?
H Zero volt contact "External demand
"
K Lag heat pump 3
L Central fault message input, lag
heat pump
N/C contact X3.10 / X3.11 triggers a
message.
A
(cont.)