18
System manager operating instructions
18
19
18
19
14
15
14
15
14
15
16
17
35
33
34
18
19
20
21
22
23
21.0
20
Se
rv
iz
io
D
at
a/
O
ra
/V
ac
an
ze
Vi
su
al
In
f.
U
te
nt
e
Pr
og
r.T
em
po
Te
cn
ic
o
Im
pi
an
to
Ac
qu
a
C
al
da
C
irc
ui
to
ri
sc
. I
So
la
re
/M
F
C
irc
ui
to
ri
sc
. I
I
°C
OK
1
2
1
2
>1s
+
°C
°C
°C
BUS ID
1/2/11/Mod
Run
2
1
Main switch
This switch connects and disconnects power to the boiler
n°1:
- With the switch at
0
, the boiler n°1 is not powered
electrically (green indicator light off).
- With the switch at
I
, the boiler n°1 is powered
electrically (green indicator light on) and is set up for
the production of hot water for heating.
Burner switch
This switch connects and disconnects power to the burner
of the boiler n°1:
- With the switch at
0
, the burner of the boiler n°1 is not
powered electrically.
- With the switch at
I
, the burner of the boiler n°1 is
powered electrically and is set up to run at request of
the heating controller.
6.5 - DUAL-STAGE MASTER PANEL BOARD code 38778 (with boilers in cascade)
14 Main switch with indicator light
16 General fuse
18 Burner switch
19 System pump switch P1 (boiler n°1 in cascade primary ring)
20 Pz1 direct zone system pump switch
21 Pz2 mixed zone system pump switch
33 Working thermostat
35 Safety thermostat
V
I
V
I
V
I
O
V I
O
Summary of Contents for PANEL BOARD MODULATING MASTER
Page 27: ...Remarks...
