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Circuit Diagram; Technical Characteristics - Bosch W11B Installation And Operating Instructions Manual

Gas instantaneous water heater
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1.7

Circuit diagram

1.8

Technical characteristics

Temperature control at maximum setting
Temperature control at minimum setting
*
H
15°C - 1013 mbar - dry :
i
**
This figure must not be exceeded taking account of water expansion
***
At maximum rated heat output
4
Technical Data
Rated max. heat output
Rated min. heat output
Output (modulation range)
Rated max. heat input
Rated min. heat input
Supply pressure:
Natural gas
LPG (butane/propane)
Consumption:
Natural gas
LPG (butane/propane)
Number of injectors
Max. water pressure**
Temperature increase
Flow rate
Min. operating pressure
Temperature increase
Flow rate
Min. operating pressure
Draught requirement
Flow rate
Temperature
Natural gas
34.2 MJ/m
LPG: Butane 45.7 MJ/kg (12.7 kWh/kg)
Fig. 4
Symbol
Unit
P
Btu/h
n
P
Btu/h
min
Btu/h
Q
Btu/h
n
Q
Btu/h
min
mbar (kPa)
mbar (kPa)
3
G20
m
/h
G30/G31
kg/h
p
psi
w
° C
l/min
p
psi
wmin
° C
l/min
bar
mbar
g/s
° C
3
(9.5 kWh/m
3
)
1
Servo valve (normally open)
2
Diaphragm valve
3
Main valve (normally closed)
4
Ionisation detector
5
Igniter electrode
6
Flue gas safety device
7
Temperature limiter
8
Igniter unit
9
LED indicator for battery charge level
10
LED indicator for burner status
11
On/Off switch
12
Batteries, 1.5 V
13
Microswitch
W11
W14
65570
80595
31420
40300
31420 - 65570
40300 - 80595
74450
92210
36200
46105
20 (2.0)
20 (2.0)
28 (2.8)
28 (2.8)
2.2
2.77
1.75
2.2
12
14
170
170
50
50
5.5
7
2.0
3.0
25
25
11
14
0.2
0.2
0.015
0.015
13
17
160
170
Propane 46.4 MJ/kg (12.9 kWh/kg)
W18
104165
52082
52082 - 104165
117825
58912
20 (2.0)
28 (2.8)
3.5
2.79
18
170
50
8.8
3.0
25
17.6
0.2
0.015
22
180
6 720 607 527

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