38
Installation instructions
3.21 - HYDRAULIC AND ELECTRIC SYSTEM CONNECTION WITH BOILERS IN CASCADE PANEL BOARD code 37892 and
code 37900
Fig. 28 shows the typical layout of the connection of the boiler to the heating system consisting in 2 boilers in cascade serving 1 high temperature zone + 1 low temperature
zone controlled by a motorised mixer valve + domestic hot water production.
Boiler n°1 is fitted with a panel board code 37892, boiler n° 2 is fitted with a panel board code 37900.
Key:
M = flow
Rat = HIGH temperature return (NOT USED)
Rbt = LOW temperature return
Vmix2 = zone mixer valve (motorised)
Pz1 = HIGH TEMPERATURE zone heating system pump
Pz2 = LOW TEMPERATURE zone heating system pump
VE =
expansion vessel
IR/AT = HIGH TEMPERATURE heating system distribution
IR/BT = LOW TEMPERATURE heating system distribution
fig. 28
Ps =
DHW recirculation pump
P1 =
circulation pump
Pb =
DHW production charge pump
SPF = storage tank probe
KF = E8.5064 heat control boiler probe
KF 1= Lago Basic 0201 RV 1 heat control boiler probe
VF = flow probe
AF = external probe
P1
°C
OK
1
2
1
2
>1s
-
+
°C
°C
°C
BUS ID
1/2/11/Mod
Run
2
1
31
42
11
41
12
13
32
Ps
PRODUTTORE ACQUA
CALDA SANITARIA
Pb
Pz1
P1
IR/BT
Pz2
Vmix2
IR/AT
SPF
VF
SONDA
ESTERNA (AF)
14
15
16
17
35
33
34
18
19
20
21
22
23
21.0
20
Ser
vizio
Data/Or
a/V
acanz
e
Visual Inf
.
Utente
Prog
r.T
empo
T
ecnico
Impianto
Acqua Calda
Circuito r
isc.
I
Solare/MF
Circuito r
isc.
II
°C
OK
1
2
1
2
>1s
-
+
°C
°C
°C
BUS ID
1/2/11/Mod
Run
2
1
PANNELLO STRUMENTI
cod. 37892
PANNELLO STRUMENTI
cod. 37900
can bus
EVENTUALE SEPARATORE IDRAULICO
PER IL PERFETTO BILANCIAMENTO
DELL’IMPIANTO
KF
KF1
M
Rat
Rbt
CALDAIA XC-K 1
VE
KF1
M
Rat
Rbt
CALDAIA XC-K 2
VE
XC-K BOILER No.1
XC-K BOILER No.2
DOMESTIC HOT WATER
PRODUCER
EVENTUAL WATER
SEPARATOR FOR THE
PERFECT BALANCE OF
HYDRAULIC SYSTEM
EXTERNAL
PROBE (AF)
CONTROL PANEL
code 37892
