Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 131

ELECTRICAL AND CONTROL SETTINGS
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Auxiliary boiler or heater (Default for Output 3)
The auxiliary boiler or heater can be used when the heat pump cannot achieve the require temperature by itself.
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Solar (Default for output 4)
This output is used when solar mode is enabled (from Unit controller) and the temperature in the solar panel rises above the water
temperature in the domestic hot water tank (DHWT). The connection between terminals 39 and 40 shall be closed in order to
activate the dedicated water pump for solar panel combination.
117 PMML0575 rev.2 - 03/2022
37 38
Auxiliary Heat
39 40
Solar (out)
(Output 4)
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