Connection Of Accessories - Viessmann Vitocrossal 100 Installation Instructions For Contractors

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 connected, remove jumper
A
between L and 1)
Codes
"4b:2" in group "General"/1
■
Effect of the function on the heating circuit pump:
■
coding address "d6" in group "Heating circuit" (only
for weather-compensated control units)
Effect of the function on the circulation pump for cylin-
■
der heating:
coding address "5E" in group "DHW"/3

Connection of accessories

A
E
Fig. 31
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.
Accessories
Extension kit for heating circuit with
mixer
EA1 extension
28
(cont.)
B C
Internal fuse
protection
2 A
2 A
EA1 extension
B
[{A [{S [{D
DE DE DE
A
Floating contact
A
EA1 extension
B
Codes
Set "3A" (DE1), "3b" (DE2) or "3C" (DE3) to 3 or 4 in
■
group "General"/1.
Effect of the function on the heating circuit pump:
■
coding address "d6" in group "Heating circuit" (only
for weather-compensated control units)
Effect of the function on the circulation pump for cylin-
■
der heating:
coding address "5E" in group "DHW"/3
D
EA1 extension, AM1 extension or solar control
D
module, type SM1
ON/OFF switch
E
Accessories
AM1 extension
Solar control module, type SM1
Internal fuse
protection
4 A
2 A