Viessmann VITOCAL 350-A Installation And Service Instructions Manual page 62

Installation sequence
Electrical connections: Heat pump control unit
B
fÖ
L
?
N
aVG
3
A
2
aVG
1
aVD
3
2
1
gÖ
N
?
L
Fig. 57
Connection to controller and sensor PCB
A
External H1 extension
B
Temperature controller for regulating swimming
C
pool temperature (floating contact, 230 V~, 0.1 A,
accessories)
D Junction box (on site)
Cascade control via KM BUS
Make connections to external extension H1 only
according to the following diagram.
62
L1
?
N
C
L2
?
L1 L3
D
E
M
3~
G F
(cont.)
Fuses and contactor for circulation pump for swim-
E
ming pool heating (accessories)
Circulation pump for swimming pool heating
F
(accessories)
3-way diverter valve "Swimming pool" (zero volt:
G
Charging the heating water buffer cylinder)