Viessmann Vitocal 200-S Installation And Service Instructions Manual page 28

Installation sequence
Electrical connection
High limit safety cut-out for heat pump in conjunc-
tion with an external heat source
X3.1
B
222.3
A
222.4
D
K1
X2.N
Fig. 21
Terminals on extension PCB
A
B Move jumper from X3.1 to 222.3
Connection on the external heat source at termi-
C
nals for external demand
High limit safety cut-out (max. 70
D
pump protection
K1 Relay; sizing in accordance with the external heat
source; observe safety instructions
Plug
sXF
Terminals Function
224.7 Circulation pump for DHW reheating
or
Control of the immersion heater EHE
(for connection, see the following dia-
gram)
Immersion heater 400 V~
224.7
B
X2.N
Fig. 22
Immersion heater, power supply 3/N/PE
A
400 V/50 Hz
Terminals of the heat pump control unit
B
28
(cont.)
C
C) as heat
°
L1 L2 L3 N
?
A
Explanation
Connection values
Max. output: 100 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Immersion heater 230 V~ (on site)
224.7
B
X2.N
Fig. 23
Immersion heater, power supply 1/N/PE
A
230 V/50 Hz
Terminals of the heat pump control unit
B
L1 L1 L1 N N N
?
A