Viessmann Vitocrossal 100 Installation Instructions For Contractors page 30

Connecting external cables
Pumps with power consumption greater than 2 A
or connection for HE pump
N L
C
L N
B
Fig. 36
Pump
A
To the control unit
B
Contactor
C
Separate power supply (observe manufacturer's
D
instructions)
Pumps 400 V~
L1 L2 L3 N PE
N L
C
B
M
A
3~
Fig. 37
Pump
A
To the control unit
B
Contactor
C
30
(cont.)
D
L N
L N PE
External
ON/OFF
A
For switching the contactor
Rated current
Recommended connecting
cable
External demand via switching contact
Connection options:
EA1 extension (accessory, see separate installation
■
instructions)
Plug
■ lH
When the contact is closed, burner operation is load-
dependent. The boiler water is heated to the set value
selected in coding address "9b" in group "General"/1.
The boiler water temperature is limited by this set
value and by the electronic maximum limit (coding
address "06" in group "Boiler"/2).
!
Please note
Live contacts lead to short circuits or phase fail-
ure.
The external connection must be floating and
meet the requirements of protection class II.
4(2) A~
2
H05VV-F3G 0.75 mm
or
H05RN-F3G 0.75 mm 2