Bosch HP270-2 - Сharacteristics between Old; New Electric Heater Design; Electric Heater Integrated in Module (HP270-3; HP200;250-1)

Page 21 from 56 6-720-821-364 SM HP270 – 250 - 200 2016/12 en
Electric Heater integrated in module (improving modularity)
The electrical heater backup is ensured through a new type integrated in the module and in line with the condenser
plate heat exchanger.
Current HP270-2
New HP270-3
Electric Heater Type
Standard copper heating element
immersed in the tank
Tube-in-tube construction (integrated
in the hp module)
Input Voltage
230 V ac
Input Power
2 kW
Thermal Cut Out
bipolar safety thermostat
bimetallic contact safety thermostat
Resistance
≈ 27 Ohm
≈ 26.5 Ohm
Table 8 – characteristics between old / new electric heater design
Pict.16 – Electric Heater integrated in module (HP270-3 / HP200/250-1)
Advantages:
- Easier maintenance (not required to empty water tank to perform Electric Heater maintenance);
- Easier accessibility for technician during inspection / control;
- Safety thermostat included in Electric Heater (see image for reset instruction);