Viessmann VITOCAL 350-A Installation And Service Instructions Manual page 57

Electrical connections: Heat pump control unit
Plug
sXF
Terminals Function
224.4 Instantaneous heating water heater
switching, stage 2
2.
r
224.6
Cylinder loading pump (DHW side)
■
and
2-way shut-off valve
■
M
224.7
Circulation pump for DHW reheat-
■
ing
or
Immersion heater switching (for
■
connection, see drawing in chapter
"Immersion heater")
Immersion heater EHE 400 V~
224.7
B
X2.N
A
Fig. 56
Immersion heater EHE, power supply 3/N/PE
A
400 V/50 Hz
Terminals of the heat pump control unit
B
L1 L2 L3 N
?
(cont.)
Explanation
Connection values:
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
See installation instructions for "instantaneous heating
water heater" and "instantaneous heating water heater
switching module".
Connection values:
Output: 130 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Connect cylinder loading pump and 2-way shut-off
valve in parallel.
Connection values:
Output: 100 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
■
Installation sequence
57