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Installation Manual
2.4.1 Installation Area Operating Conditions
This water heater must be installed upright in the vertical position and on a
level wall surface as described in this manual.
WARNING: IMPROPER OR DANGEROUS OPERATION
DO NOT attempt to install this water heater in any other
orientation. Doing so will result in improper water heater
operation and property damage, and could result in serious
personal injury or death.
Ensure ambient temperatures are higher than 32°F / 0°C and lower than
104°F / 40°C.
A ttic ambient temperatures may frequently exceed 104°F.
WARNING: IMPROPER OR DANGEROUS OPERATION
Extreme ambient conditions can lead to damage to the
heating system and put safe operation at risk. Ensure that
the installation location adheres to the information included
in this manual. Failure to do so could result in property
damage, serious personal injury, or death.
Avoid continuously high levels of humidity, moisture, or dust, or an area
that may be splashed with water or other liquids. DO NOT install under
water pipes or air conditioning lines that might leak or condense onto the
water heater.
W hen installing in a minimum clearance location, it may not be possible
to read or view some product labeling. It is recommended to make note
of the water heater model and serial number.
WARNING: SCALD HAZARD
Keep water heater and hot outlet piping securely out of the
reach of children to prevent tampering with the controls or
contact with an extremely hot pipe.
NOTICE: PRODUCT DAMAGE, PROPERTY DAMAGE
The service life of the water heater's exposed metallic
surfaces, such as the junction box, is directly influenced by
proximity to damp and salty marine environments. In such
areas higher concentration levels of chlorides from sea spray
coupled with relative humidity can lead to degradation of
water heater components and cause premature water heater
failure. Such failures ARE NOT covered by warranty.
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2.4.2 Freeze Protection
F ailure of the water heater due to freeze related damage IS NOT covered
by product warranty.
If the ambient temperature falls below 32°F (0°C), protect the heater from potential
damage by shutting off power to the unit by means of the dedicated circuit
breaker on the main electrical panel. Open a faucet slightly to cause water to fl ow
continuously through the device at a very low rate, without heating. Restore power
to the unit when temperature conditions allow.
If the water freezes inside the unit, it can cause damage that is not covered by
warranty. If you suspect water has frozen within the unit, do not turn it on until
you are certain the frozen water has melted and there are no leaks in the unit.
It is recommended to contact a qualifi ed electrician or customer service in this
situation.
W ARNING: PRODUCT DAMAGE, PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH
NEVER use any toxic chemical, including automotive,
2.4.3 Choosing a Location
Choose a location for the water heater based on it's intended usage. If it is to
be used as a whole house water heater, locate it as centralized to the piping and
electrical system as possible. Also, locate the water heater and domestic water
piping where it will not be exposed to freezing temperatures. All piping should be
insulated to minimize heat loss.
If the water heater is to be used for a single point of use (i.e. bathroom sink), locate
the unit as close to the hot water fi xture as possible to minimize heat loss and hot
water wait times.
Additionally, place the water heater so that the drain, controls, and inlets/outlets
are easily accessible.
I n some states including the State of California, the water heater must be
braced, anchored, or strapped to avoid moving during an earthquake.
Contact local utilities or agency having jurisdiction for code requirements
in your area.
WARNING: FIRE, EXPLOSION
This water heater must not be located near fl ammable
Bosch Tronic TR4000C Electric Tankless Water Heaters - BTC 722203301 A (08.2022)
standard glycol antifreeze, or ethylene glycol made for
hydronic (non-potable) systems. These chemicals can
attack gaskets and seals in water systems, are poisonous if
consumed, and can cause personal injury or death.
liquids such as gasoline, butane, liquefi ed propane,
adhesives, solvents, paint thinners, etc., as the controls of
this water heater could ignite these vapors and cause an
explosion resulting in property damage, severe personal
injury, or death.
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