Specifications

Page 12 from 63
6720649497 SM HP270-1 2012/09 en
2.3 Coil for external source of energy
The coil integrated in the storage tank of some of the models (see table 1), can be used to combine the heat pump
with a back up energy system like solar, boiler, etc. In case the coil will not be used, do not remove the caps from
the coil inlet and outlet connections. This will avoid thermal losses due to the contact of the air in the coil with the
surrounding hot water in the tank.
In order to control the temperature in the tank for the external heat source, a pocket for external sensor is available
and adapted to the available fixation systems of sensors in TT, ensuring the correct contact with the tank.
Pict.18 – Storage tank and example of external sensor fixation system to pocket
3. Module
A routine maintenance agreement should be taken with a licensed service person or organisation. In addition, end-
users should monitor their installation and call a service person immediately, in case any abnormal
operation/situation is found. The system should be serviced by a qualified person, every 12 months, depending on
use/installation conditions.
Pict.19 – Components overview
Bosch / Buderus / Vulcano
Junkers / ELM Leblanc