4
6 720 607 526
1.6
Technical characteristics
*
H
i
15°C - 1013 mbar - dry :
Natural gas
34.2 MJ/m
3
(9.5 kWh/m
3
)
LPG: Butane 45.7 MJ/kg (12.7 kWh/kg)
Propane 46.4 MJ/kg (12.9 kWh/kg)
**
This figure must not be exceeded taking account of water expansion
***
At maximum rated heat output
Technical Data
Symbol
Unit
W11
W14
W18
Rated max. heat output
P
n
Btu/h
65570
80595
104165
Rated min. heat output
P
min
Btu/h
31420
40300
52082
Output (modulation range)
Btu/h
31420 - 65570 40300 - 80595 52082 - 104165
Rated max. heat input
Q
n
Btu/h
74450
92210
117825
Rated min. heat input
Q
min
Btu/h
36200
46105
58912
Supply pressure:
Natural gas
mbar (kPa)
20 (2.0)
20 (2.0)
20 (2.0)
LPG (butane/propane)
mbar (kPa)
28 (2.8)
28 (2.8)
28 (2.8)
Consumption:
Natural gas
m
3
/h
2.2
2.77
3.5
LPG (butane/propane)
kg/h
1.75
2.2
2.79
Number of injectors
12
14
18
Max. water pressure**
p
w
psi
170
170
170
Temperature control at maximum setting
Temperature increase
°C
50.0
50.0
50.0
Flow rate
l/min
5.5
7
8.8
Min. operating pressure
p
wmin
psi
2.0
2.0
3.0
Temperature control at minimum setting
Temperature increase
°C
25
25
25
Flow rate
l/min
11
14
17.6
Draught requirement
mbar
0.015
0.015
0.015
Flow rate
g/s
13
17
22
Temperature
°C
160
170
180
O
ut
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h
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as
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sp
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*
W
at
er
s
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s
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ci
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Fl
ue
sp
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ifi
ca
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ns
**
*
