Electric Booster Heater (On-Site) - Viessmann Vitocal 300-G Pro Installation And Service Instructions For Contractors

Installation sequence
Electrical connections
[{A [{S
DE DE
1 2 1 2 3 4
K H
Fig. 28
EA1 extension
A
Power supply 1/N/PE 230 V/50 Hz
B
C Junction box (on site)
Fuses and contactor for circulation pump for swim-
D
ming pool heating (accessories)
Jumper
E
3-way diverter valve for "Swimming pool" (zero
F
volt: heating the heating water buffer cylinder)
Cascade control via LON
The following communication modules (accessories)
must be fitted in the heat pump control units:
LON cascade communication module in the lead
■
heat pump
■ LON communication module in lag heat pumps

Electric booster heater (on-site)

Only on-site appliances can be used (e.g. instantane-
ous heating water heater, immersion heater in heating
water buffer cylinder).
44
(cont.)
A
[{D [{{] 0-10V
DE
5 6 + -
f-]
A
E
N L1
B
L1 N
C
D
M
1~
F G
Circulation pump for swimming pool heating
G
(accessories)
Temperature controller for swimming pool temper-
H
ature control (floating contact: 230 V~, 0.1 A,
accessories)
Connection to controller and sensor PCB
K
Make connections for LON only in accordance with
separate "Connection and wiring diagram".
■ Connection:
Appliance installation instructions
–
Electrical connection, see separate "Connection
–
and wiring diagram".
■ Installation in the Vitocal 300-G Pro is not possible.