Bosch 520-HN-N - Warning and Safety Information; General Safety Warnings; DANGER: High Temperature Water; Appliance Details

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Index
Index
1 Warning 2
2 Appliance details 3
2.1 520 HN specifications (Technical data) 3
2.2 Unpacking the 520 HN heater 4
2.3 General rules to follow for safe operation 4
2.4 Dimensions and installation clearances 5
3 Installation instructions 6
3.1 Introduction 6
3.2 Proper location for installing your heater 6
3.3 Venting 6
3.4 Combustion air requirements 9
3.5 Mounting Heater 9
3.6 Gas piping & connections 11
3.7 Measuring gas pressure 13
3.8 Water connections 13
3.9 Recirculation application 14
4 Operation instructions 14
4.1 For your safety, read before operating your water heater 14
4.2 Lighting instructions 15
4.3 To turn off appliance 15
4.4 Adjusting the water temperature 15
4.5 Power adjustment knob 16
4.6 Draining the appliance 16
5 Maintenance and service 17
5.1 Maintenance intervals 17
5.2 Water valve 17
5.3 Pilot 17
5.4 Main burners 18
5.5 Vent assembly 18
5.6 Mineral scale build-up 18
6 Troubleshooting 19
6.1 Introduction 19
6.2 No spark at pilot with water flow 19
6.3 Spark appears when hot water is turned on,
but pilot and burners will not ignite 19
6.4 Pilot lights, but burners will not come on. 20
6.5 Main burners go out during hot water use 20
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 Low hot water pressure 22
6.10 Noise when heater is running 22
6.11 Burners do not burn cleanly, yellow
flames when operating 22
7 Protecting the environment 23
8 Interior components and diagram parts list 24
8.1 Interior components 24
8.2 Components diagram 25
8.3 Parts list 26
9 Fifteen Year Limited Warranty 27
1 Warning
Fig. 1
Warning: The heater must be isolated
from the gas supply piping system
during any pressure testing of that
system at test pressures equal to or
more than 0.5 psig.
Caution: Any changes or
modifications not expressly approved
by the party responsible for compliance
could void the user’s authority to
operate the equipment.
HOT
BURN
D A N G E R
Watertemperatureover125°Fcan
causesevereburnsinstantlyor
deathfromscalds.
Children,disabledandelderlyare
athighestriskofbeingscalded.
Seeinstructionmanualbefore
settingtemperatureatwater
heater.
Feelwaterbeforebathingor
showering.
6720608643-16.1AL