Pumps With Power Consumption Greater Than 2 A Or Connection For He Pump - Viessmann VITOCROSSAL Series Installation Instructions Manual

Connecting external cables

Pumps with power consumption greater than 2 A or connection for HE pump

N L
C
L N
B
Fig. 37
Pump (on site)
A
To the control unit
B
Contactor (on site)
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. 38
Pump (on site)
A
To the control unit
B
Contactor (on site)
C
(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 parameter/coding address "9b" in the
"General"/1 group. The boiler water temperature is
limited by this set value and by the electronic maxi-
mum limit (coding address "06" in the "Boiler"/2
group).
!
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
2
H05RN-F3G 0.75 mm
31