Viessmann Vitocal 300-G Installation And Service Instructions Manual page 92

Installation sequence
Electrical connections
B
fÖ
L
?
N
aVG
3
A
2
aVG
1
aVD
3
2
1
gÖ
N
?
L
A Connection to controller and sensor
PCB
B External extension H1
C Thermostat for swimming pool tem-
perature control (zero volt contact,
230 V~; 0.1 A; accessory)
D Junction box (on site)
E Fuses and contactor for circulation
pump for swimming pool heating
(accessory)
Cascade control via KM BUS
Make connections at external extension
H1 only in accordance with the following
diagram.
92
(cont.)
L1
?
N
C
L2
?
L1 L3
D
M
3~
G F
F Circulation pump for swimming pool
water heating (accessory)
G 3-way diverter valve "swimming
pool" (at zero volt: heating of the
heating water buffer cylinder)
E