72
ES
PT
GB
1.1 INTRODUCTION
“MURELLE”
are the gas fuelled burner
groups for heating and the production of
hot sanitary water, constructed to satisfy
the needs of collective residential housing
and modern plant.
They are apparatuses which conform to
the Eur opean dir ectives 90/396/CE,
2 0 04 / 10 8 / C E , 2 0 0 6 / 9 5 / C E a n d
92/42/CE. The can be fuelled by natural
gas (G20) or LPG (G30-G31). This booklet
gives the instructions for the following
models:
– “MURELLE 25-30 OF”
with electronic
modulation ignition, open combustion
chamber with natural draw
– “MURELLE 25 OFT”
only heating, with
electronic modulation ignition, open com-
bus tion chamber and natur al dr aw,
which can be connected to D.H.W. stora-
ge tank .
– “MURELLE 25-30-35 BF”
with electro-
nic modulation ignition, sealed combu-
stion chamber forced flow.
–
“MURELLE 20-25 BFT”
only heating,
with electronic modulation ignition, sea-
led combustion chamber and forced
flow, which can be connected to D.H.W.
storage tank.
The instructions given in this manual are
provided to ensure proper installation and
perfect operation of the appliance.
1
DESCRIPTION OF THE BOILER
1.2
DIMENSIONS
1.2.1
“25-30 OF” models
198
55
55
ø D
70
70
70
70
=
=
125
60
350
L
=
=
700
65
71
8
22
Fig. 1
CONNECTIONS
R C.H.
return
G 3/4” (UNI-ISO 228/1)
M C.H.
flow
G 3/4” (UNI-ISO 228/1)
G Gas
connection
G 3/4” (UNI-ISO 228/1)
E D.H.W.
inlet
G 1/2” (UNI-ISO 228/1)
U D.H.W.
outlet
G 1/2” (UNI-ISO 228/1)
DIMENSIONS
25
30
L mm
400
450
D mm
130
150
1.2.2
“25 OFT” models
350
107
125 60
400
40
71
70 70
61
ø 130
71
8
22
700
65
10
7
12
5
60
=
=
198
55
55
R
M
G
M2
R3
G
G
R
M
C
C
= =
Fig. 1/a
CONNECTIONS
R
C.H. return
G 3/4” (UNI-ISO 228/1)
M C.H. flow
G 3/4” (UNI-ISO 228/1)
G
Gas connection
G 3/4” (UNI-ISO 228/1)
R3 D.H.W. tank return
G 3/4” (UNI-ISO 228/1)
M2 D.H.W. tank output
G 3/4” (UNI-ISO 228/1)
C System loading
G 1/2” (UNI-ISO 228/1)
ATTENTION:
The
“OFT”
version is
designed for t he connection of a
remote boiler, to use it as a boiler
ONLY FOR HEATING
it is necessary:
- to disconnect D.H.W. sensor (SB)
- set the PAR 2 to 4.
All modules are designed to be used
by qualified technical personnel.
Содержание Murelle 20 BFT
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