6 720 644 947
2
Index
Index
1
Warning
3
2
Appliance details
4
2.1
520 PN specifications (Technical data)
4
2.2
Unpacking the 520 PN heater
5
2.3
General rules to follow for safe operation
5
2.4
Dimensions and installation clearances
6
3
Installation instructions
7
3.1
Introduction
7
3.2
Proper location for installing your heater
7
3.3
Heater placement and clearances
7
3.4
Mounting Heater
8
3.5
Combustion air requirements
9
3.6
Venting
10
3.7
Gas piping & connections
12
3.8
Measuring gas pressure
14
3.9
Water connections
14
3.10 Recirculation application
15
4
Operation instructions
15
4.1
For your safety read before operating
your water heater
15
4.2
Lighting instructions
16
4.3
To turn off appliance
16
4.4
Setting the water temperature
17
4.5
Draining water from heater
17
5
Maintenance and service
18
5.1
Maintenance intervals
18
5.2
Water valve
18
5.3
Pilot
18
5.4
Main burners
19
5.5
Vent assembly / heat exchanger
19
5.6
Mineral scale build-up
19
6
Troubleshooting
20
6.1
Introduction
20
6.2
Pilot does not light
20
6.3
Pilot lights, but goes out when
button is released
20
6.4
Pilot goes out during or after hot water use 20
6.5
Burners do not light with water flow
21
6.6
Hot water temperature fluctuates at tap
21
6.7
Water is too hot
21
6.8
Water is not hot enough
22
6.9
Burners ignite without hot water flow
22
6.10 Low hot water pressure
22
6.11 Noise when heater is running
22
6.12 Burners do not operate cleanly;
yellow flames when operating
23
7
Protecting the environment
24
8
Interior components and
diagram parts list
25
8.1
Interior components
25
8.2
Components diagram
26
8.3
Parts list
27
9
LIFETIME LIMITED WARRANTY
FOR BOSCH TANKLESS
WATER HEATERS
28
10
Notes
30
Содержание 520-PN-L
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