Electrical Connections - Viessmann FB2A Installation And Service Instructions For Contractors

Installation sequence

Electrical connections

Information regarding the connection of accessories
For the connection, observe the separate installation instructions provided
with the accessory components.
!
Please note
Electronic modules can be damaged by electrostatic discharges.
Before beginning work, touch earthed objects, such as heating or water pipes,
to discharge static loads.
A
aVG
%
X4
A Solar control module KM BUS con-
nection (connected in the delivered
condition)
B Solar control module power supply
Plug 230 V~
sA Cylinder primary pump E (fitted
and connected)
16
?
!
230V~
7654 321 100 35
X3
C
B
N L L N
? ?
230V~
20 96 40
C External safety solenoid valve
(LPG)
D Cyl. primary pump
fÖ Power supply
M
D
1~
N L L1 N L
? ?
53 21