Connection Of Accessories - Viessmann Vitocrossal Installation Instructions Manual

Boiler electrical connection
!
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.
Plug
lH
A
1 L N
?
lH
Floating contact (when connecting, remove jumper
A
between L and 1)
Parameters/codes
"4b:2" in the "General"/1 group
■
Effect of the function on the heating circuit pump:
■
Parameter/coding address "d6" in the "Heating cir-
cuit" group (only for weather-compensated control
units)
Effect of the function on the circulation pump for cylin-
■
der heating:
Parameter/coding address "5E" in the "DHW"/3
group

Connection of accessories

A
E
Fig. 30
Boiler control unit
A
Extension kit for heating circuit with mixer M2
B
Extension kit for heating circuit with mixer M3
C
If the current flowing to the connected actuators (e.g.
circulation pumps) is higher than the fuse rating of the
accessory: Only use the output concerned to control
an on-site relay.
26
(cont.)
B C
EA1 extension
B
[{A [{S [{D
DE DE DE
A
Floating contact
A
EA1 extension
B
Parameters/codes
Set "3A" (DE1), "3b" (DE2) or "3C" (DE3) to 3 or 4 in
■
the "General"/1 group
Effect of the function on the heating circuit pump:
■
Parameter/coding address "d6" in the "Heating cir-
cuit" group (only for weather-compensated control
units)
Effect of the function on the circulation pump for cylin-
■
der heating:
Parameter/coding address "5E" in the "DHW"/3
group
D
EA1 extension, AM1 extension or solar control
D
module, type SM1
ON/OFF switch
E
Accessories
Extension kit for heating circuit with
mixer
EA1 extension
AM1 extension
Solar control module, type SM1
Internal fuse
protection
2 A
2 A
4 A
2 A