Viessmann Vitocal 300-G Installation And Service Instructions For Contractors page 88

Installation sequence
Electrical connections in the heat pump control...
Swimming pool water heating
Note
■ Swimming pool water heating is
switched via external extension H1
with KM BUS.
■ Make connections at external exten-
sion H1 only in accordance with the
following diagram.
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)
88
■ At plug gÖ connect only the circulation
pump for swimming pool water heating
F in accordance with the following
diagram. A filter circuit pump must be
connected separately.
■ If the components for swimming pool
water heating are connected to exter-
nal extension H1, no other external
function (e.g. changeover of operating
mode) can be connected.
L1
?
N
C
L2
L1 L3
D
M
3~
G F
E Fuses and contactor for circulation
F Circulation pump for swimming pool
G 3-way diverter valve "swimming
?
E
pump for swimming pool heating
(accessory)
water heating (accessory)
pool" (at zero volt: heating of the
heating water buffer cylinder)
(cont.)