Internal Unit: Avi Pcb - Viessmann VITOCAL 222-S Installation And Service Instructions Manual

Installation sequence
Electrical connection
Plug Sensor
X18 Modbus 1
Connection for Viessmann appliances, e.g. Vitovent 300-F
Note
If further Viessmann appliances are to be connected to Modbus 1, plug in the
Modbus distributor (accessories) (see "Modbus distributor" installation in-
structions).
X24 Connection for LON communication module (see "LON communication mod-
ule" installation instructions)
X31 Slot for coding card
Swimming pool heating
Note
■ Swimming pool heating is controlled via the
EA1 extension with KM BUS.
■ Make connections to EA1 extension only in accord-
ance with Fig. 30.
A filter circuit pump cannot be controlled via the heat
■
pump control unit.
[{A [{S
DE DE
1 2 1 2 3 4
K H
Fig. 30
EA1 extension
A
Power supply 1/N/PE 230 V/50 Hz
B
Junction box (on site)
C
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)

Internal unit: AVI PCB

Interface internal unit external unit
–
38
(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
Type
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