Bosch DOMESTIC HOT WATER HEAT PUMP Technical Manual page 11

Pict.15 – Check continuity between terminals
After any intervention in the anode and/or thermostat, ensure the correct assembly with correspondent washer and
assembly of the protection cover.
Pict.16 – Protection cover of the thermostat and electrical backup group
In the most recent production models, order to increase robustness of the tank in the models with coil, the electric
heater of the models HP 270-1E 1 (with coil), is from was isolated. Spare part will is available as isolated electric
heater for models, with and without coil.
b
b
a a
a. Resistor (560Ω) b. Dielectric insulation (tank / electric heater)
Picture 17 – Isolated electric heater
Attention: Resistor connection Picture 17.a is essential to ensure function and life time of the electric heater and,
consequently, of the product. In case of defected component, the complete electric heater must be replaced.
6720649497 SM HP270-1 2012/09 en
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