3
1
2
3
4
22
5
7
8
27
11
14
10
9
6
16
12
18
28
13
19
21
20
17
U
E
G
M
R
1.4
HYDRAULIC CIRCUIT
KEY
1 Fan
2 Water-gas exchanger
3 Combustion chamber
4 Gas valve
5 D.H.W. exchanger
6 Divertor valve
7 NTC sensor
8 100°C safety thermostat
9 Air relief valve
10 Circulation pump
11 Expansion vessel
12 Safety valve
13 Drain plug
14 Water flow switch
16 Automatic by-pass
17 D.H.W. filter
18 C.H. return cock
19 C.H. flow cock
20 D.H.W. cock
21 Gas cock
22 Fixing jig
27 Thermometer sensor
28 Hydrometer
80 C
100 C
Main burner injectors
No off
12
14
Dia (G20)
mm
1.3
1.3
Dia (G30 - G31)
mm
0.77
0.78
Water capacity
l
(gal)
3.4
(0.75)
4.7
(1.00)
Minimum water flow
D.H.W.
l/min (gal/min)
2
(0.5)
2
(0.5)
D.H.W. flow rate
at a temperature rise of
30°C
l/min (gal/min)
11.2
(2.5)
13.8
(3.0)
35°C
l/min (gal/min)
9.6
(2.1)
11.9
(2.6)
Static head
Minimum
bar
(psi)
0.5
(7.3)
0.5
(7.3)
Maximum
bar
(psi)
3.0
(43.5)
3.0
(43.5)
D.H.W. pressure
Minimum
bar
(psi)
0.5
(7.3)
0.5
(7.3)
Maximum
bar
(psi)
7.0
(102)
7.0
(102)
Weight
Empty
kg
(lb)
38
(84)
40 (88)
Total (full)
kg
(lb)
41.4
(91)
44.7
(98)
Electrical supply
230 V - 50 Hz, Fused at 3 A
Internal fuse
Line: F 1.6 A
Maximum power consumption
Watt
150
160
Maximum gas consumpt. (G20)
m
3
/h (ft
3
/h)
2.73
(96)
3.34 (118)
Maximum gas consumpt. (G30 - G31)
kg/h
(lb/h)
2.02 - 1.99
(4.45 - 4.39)
2.48 - 2.44
(5.47 - 5.38)
Max. working temperature
°C
(F)
95 (203)
95 (203)
Integral exp. vessel capacity
l
(gal)
6 (1.32)
8 (1.76)
TABLE 4 - General specifications
Fig. 2
Summary of Contents for Murelle 25 BF
Page 24: ...Format C installation and servicing instructions...
Page 53: ...26...
