30
3-3
3
2
1
1
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
For "WE-BUS", "0-10", "Simple BUS cascade"
connection, remove the X40 bridge.
A thermostat can be used instead of B2 (set the
P29 = 17 parameter).
The "Remote control for single high power boiler"
must be connected to the "M" and "O" terminals
(set the address to zero).
Configure the corresponding parameters when
connecting in “simple cascade”, or when con-
necting in “system side flow probe”, or “D.H.W.
pump”.
3.3 VERY LOW VOLTAGE WIRING DIAGRAM.
Ke
y:
A
2
-
Ele
ct
ro
nic
boa
rd
A4
-
D
isp
la
y b
oa
rd
B1
-
Fl
ow p
ro
be
B1-2
-
Sys
tem s
id
e fl
ow p
ro
be (o
pt
io
na
l)
B2
-
D
om
es
tic h
ot w
at
er p
ro
be (o
pt
io
na
l)
B4
-
Ext
er
na
l t
em
per
at
ur
e p
ro
be (o
pt
io
na
l)
B5
-
Re
tu
rn p
ro
be
B10
-
Fl
ue
pr
ob
e
E4
-
Sa
fety t
her
m
os
ta
t
E5
-
-H
ea
t-ex
ch
an
ger s
af
ety t
her
m
os
ta
t
(m
an
ua
l r
es
et)
E13
-
Fl
ue s
af
ety t
her
m
of
us
e
M1
-
Bo
iler ci
rcu
la
to
r p
um
p
M20
-
Fa
n
S5
-
Sys
tem p
re
ssu
re s
w
itc
h
S6
-
Ai
r p
re
ssu
re s
w
itc
h
S20
-
O
N/O
FF r
oo
m t
her
m
os
ta
t (o
pt
io
na
l)
X40
-
Ro
om t
her
m
os
ta
t j
um
per
1
-
Te
sting
2
-
“S
im
pl
e c
as
ca
de
” c
om
m
un
ica
tio
n b
us
3
-
0 - 10 V a
na
log
ue i
np
ut
Col
ou
r k
ey
:
BK
-
Bl
ac
k
BL
-
Bl
ue
BR
-
Br
ow
n
G
-
Gr
een
GY
-
Gr
ey
O
R
-
O
ra
nge
P
-
Pu
rp
le
PK
-
Pin
k
R
-
Re
d
Y
-
Ye
llo
w
Y/G
-
Ye
llo
w / G
re
en
W
-
W
hi
te
W/BK
-
W
hi
te / B
la
ck
