Viessmann AWS 104, Installation And Service Instructions For Contractors

Page: 43 / 124

43
A AVI PCB (see page 43)
B
Control module power connection
for instantaneous heating water
heater
C Luster terminals (see page 43)
D Control and sensor PCB (see
page 45)
E Main PCB (see page 47)
F
Extension PCB (see page 51)
G Programming unit
AVI PCB A
Interface internal unit – external unit
Plug Components
F101 Fuse 0.2 AL (slow)
P202 BUS connection (12 V) to the external unit (type AWS/AWS-AC 110
and 113)
P203 BUS connection (43 V) to the external unit (type AWS/AWS-AC 104
and 107)
Note
■ Only one BUS connection must be
connected.
■ Never interchange the BUS connec-
tion wires between the internal and
external units.
Luster terminals C (message and safety connections)
Terminals Function Explanation
F1 Fuse, heat pump control
unit 6.3 A slow
X1 Earth conductor "
?
" Terminals for the earth conductor of all
components
X2 Neutral conductor "N" Terminals for the neutral conductor of all
components
X3 Terminals for message and safety connec-
tions
X3.1 Phase "L1" switched Via heat pump control unit ON/OFF
switch
Note
Observe the total load (1000 W) of all con-
nected components.
Installation sequence
Electrical connection
(cont.)
5724 152 GB
Installation