The boiler must be installed in a fixed loca-
tion and only by specialized and qualified
firms in compliance with all instructions
contained in this manual.
Furthermore, the installation must be in
accordance with current standards and
regulations.
2.1
BOILER ROOM
The boilers
MURELLE HE 110 R
can be
installed in boiler rooms whose size and
requirements meet current regulations.
Furthermore, vents, with surface areas at
least 3.000 sq. cm or 5.000 sq. cm for
gas with density over 0.8, must be installed
in the outer walls for room ventilation.
2.2
INSTALLATION
2.2.1
Single boiler (fig. 4)
A single function compensator kit is availa-
ble upon request code 8101581.
The kit is for use on an accumulating boiler
with capacity equal to or greater than 80
litres.
Depending on the type of exhaust fumes
chosen and described in section 2.6, set
the following parameter:
-
PAR 9 =
You see TABLE 1-2-3-3/a.
Refer to section 3.3 to access the INSTAL-
LER PARAMETERS section.
2.2.2 Sequence/cascade
boilers
(fig. 4/a)
For sequence/cascade installations using
polypropylene smoke collectors with a cla-
pet valve, every single boiler that makes up
the heating system must have the following
installation parameters modified:
-
PAR 1 = 8
(for G20 NATURAL GAS boi-
lers).
-
PAR 1 = 16
(for G31 PROPANE boilers)
Refer to section 3.3 to access the INSTAL-
LER PARAMETERS section.
ATTENTION: In the event that intake pres-
sure drops are applied to
sequence/cascade installations, it is
important to verify the CO
2
at MAX and
MIN capacity and, if necessary, bring it
back to the correct value described in sec-
tion 4.2.2. In sequence/cascade installa-
tions, it is mandatory to arrange the ther-
mal system with the hydraulic separator
and safety devices.
The boiler is provided with the board
RS-
485
that permits to manage up to 8 boi-
lers in cascade and communication in
MODBUS. The board is placed on the back
of the control panel.
AAccess the board and chose the desired
operating mode (CASCADE or MODBUS) by
2
INSTALLATION
DIP SWITCH
GESTIONE IN CASCATA
1
2
3
CASCADE MANAGEMENT
DIP SWITCH
GESTIONE IN MODBUS
MODBUS MANAGEMENT
1 2 3
ON
1 2 3
ON
500
600
R3
235
70
R
M
M2
115
265
663
865
355
301
Single installation
with kit optional code 8101581
WARNING :
- It is mandatory to arrange the thermal system with the hydraulic separator.
- When replacing one or more boilers in existing plants, it is advisable to install a
heat exchanger to separate the boiler circuit from the secondary circuits. See
the pressure curve for the boiler supply shown in figure 14.
Fig. 4
x 2
Fig. 4/a
M
C.H. flow
R 2” (UNI-ISO 7/1)
R
C.H. return
R 2” (UNI-ISO 7/1)
M2 D.H.W. tank flow
G 1” (UNI-ISO 228/1)
R3
D.H.W. tank return
G 1 1/2” (UNI-ISO 228/1)
71
ES
PT
ENG
