Viessmann Vitocal 242-S Installation And Service Instructions Manual page 57

Electrical connection
A
A Extension EA1
B Power supply 1/N/PE 230 V/50 Hz
C Junction box (on site)
D Fuses and contactor for circulation
pump for swimming pool heating
(accessory)
E Jumper
F 3-way diverter valve for "swimming
pool" (zero volt: charging the heat-
ing water buffer cylinder)
(cont.)
L1
B
N
C
E
H
K
Installation sequence
L1 N
D
M
1~
F G
G Circulation pump for swimming pool
heating (accessory)
H Temperature controller for regulat-
ing the swimming pool temperature
(floating contact, 230 V~; 0.1 A;
accessory)
K Connection to controller and sensor
PCB
57