Installation and operating instructions
Fresh water station WHI freshaqua 44; Fresh water station WHI freshaqua 55
83514402
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1/2017-08
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Ext. PAW
26-36
7.4
Setting the temperature
The desired (maximum) domestic hot water temperature is set on the controller under
"Para" (see controller manual, page 24).
WARNING
Risk of scalding from hot water!
In order to prevent scalding at the tap, the maximum hot
water temperature should not exceed 60 °C.
Tip for convenient optimisation: at high buffer temperatures (e.g., solar operation),
the hot water temperature should be set as high as possible (max. 60 °C).
Primary side
The temperature in the buffer tank required on the primary side depends on the hot
water temperature as well as the tapping quantity required. The temperature in the
buffer tank must be at least 5 K above the desired hot water temperature.
Secondary side
The possible tapped flow rate [l/min] at the tap depends on the water temperature set on
the controller and the temperature available in the tank.
The recommended maximum domestic water flow rate through the WHI freshaqua 44 is
65 l/min. The flow rate through WHI freshaqua 55 is 88 l/min.
System-related large changes in the domestic water flow rate result in variations of the
hot water outlet temperature. However, these variations are usually smoothed by the
pipework in the building or by admixing water at the service water fittings.
