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Installation Manual
1 Key to Symbols and Safety Instructions
1.1 Key to Symbols
Warnings
Warnings in this document are identifi ed by a
warning triangle printed against a grey background.
Keywords at the start of a warning indicate the type and seriousness
of the ensuing risk if measures to prevent the risk are not taken.
The following keywords are defi ned and can be used in this document:
DANGER indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided, could
result in minor to moderate injury.
NOTICE is used to address practices not related to personal injury.
Important information
T his symbol indicates important information where there is no risk to
people or property.
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1.2 Safety
Please read before proceeding
Installation should be made in accordance with the regulations of the
Authority Having Jurisdiction, local code authorities, and utility
companies which pertain to this type of water heating equipment.
Authority Having Jurisdiction (AHJ) – The AHJ may be a federal, state,
local government, or individual such as a fi re chief, fi re marshal, chief
of a fi re prevention bureau, labor department or health department,
building offi cial or electrical inspector, or others having statutory
authority. In some circumstances, the property owner or his/ her agent
assumes the role, and at government installations, the commanding
offi cer or departmental offi cial may be the AHJ.
WARNING: IMPORTANT SAFETY INSTRUCTIONS
When using electrical appliances, basic safety precautions
to reduce the risk of fire, electric shock, or injury to persons
should be followed, including:
1. READ ALL INSTRUCTIONS BEFORE USING THIS WATER
2. This water heater must be grounded.
3. Install or locate this water heater only in accordance with
4. Do not use this water heater for anything other than its
5. For power supply connection, use the correct AWG wires
6. The heater must be connected to dedicated circuit
7. The plumbing installation must be completed before the
8. The plumbing installation requires metal pipes or reinforced
9. To ensure proper operation, the water supply fl ow rate must
10. Do not install the heater where it may be subjected to direct
11. Before connecting the unit to a public power network,
12. Do not operate this water heater if it has damaged wiring,
13. This water heater should be serviced only by qualifi ed
Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722203301 A (08.2022)
HEATER.
the provided installation instructions.
intended purpose (as described in this manual). Doing so
could result in property damage and WILL VOID product
warranty.
or larger, suitable for at least suitable for at least 194°F
(90°C).
breakers. When the heater is not within sight of the
electrical circuit breakers, a circuit breaker lockout or
additional local means of disconnection for all nongrounded
conductors must be provided that is within sight of the
appliance. (Ref NEC 422.31.).
electrical installation.
hoses that can withstand pressure up to 116 psi.
be at least 0.55 gpm.
sunlight, rain, splashing water, or freezing temperatures.
consult the local power supply authority to ensure the
power network meets the stated requirements.
if it is not working properly, or if it has been damaged or
dropped.
service personnel. Contact the water heater installer
or a qualifi ed service agency for examination, repair, or
adjustment.
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