6 720 643 256 (2010/05)
8 | Explanation of symbols and safety information US/CA
1.2 Safety instructions
B To ensure proper function, follow these
instructions.
B Install and start up the boiler and all
accessories according to the associated
instructions.
B Only have this accessory installed by a trained
and certified installer.
B Use this accessory exclusively in conjunction
with the controllers and heating appliances
listed. Follow the connection diagram!
B Never connect this accessory to 120 VAC line
voltage.
B Prior to mounting this accessory:
Isolate the boiler from the power supply
(120 VAC) using the emergency shut-off
switch or the heating system circuit breaker.
B Electrical components must be installed by a
trained electrician and the installation must
meet the National Electric Code as well as all
applicable local codes and regulations.
B Provide a dedicated circuit breaker for the
boiler and heating system rated at least 15 A.
B All line voltage wiring must use at least
AWG14 size cables.
B In case of wall mounting: never mount this
accessory in wet areas.
B Instruct customers about the functions and
operation of this accessory.
B Risk of scalding during thermal disinfection:
Due to DHW temperatures occurring in excess
of 140 °F (60 °C), Bosch strongly advises to
install a DHW thermostatic mixing valve.
B When there is a risk of frost, leave the boiler
switched on and follow the frost protection
information.
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