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h) Displaying the valve position, ‘STEL’
When this menu item is selected, the approximate percentage of the valve opening is displayed.
• Keep the ‘PROG’ button pressed until ‘Sond’ (special) appears on the display. Then release the ‘PROG’ button again.
• Use the scroller to select the special ‘STEL’ (position) function.
• Confirm this by briefly pressing the ‘PROG’ button.
• The valve opening is displayed as a percentage.
• Pressing the ‘PROG’ button briefly ends this function.
i) Setting the valve operating mechanism offset, ‘OFFS’
If several radiators are controlled by one controller, it is possible that these radiators do not heat uniformly.
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The reason for this is that the flow rates of different valves differ greatly or the radiators may be poorly
dimensioned. This problem may be solved by adjusting the settings of single radiators so that they give off
more (positive offset) or less (negative offset) heat.
• Keep the ‘PROG’ button pressed until ‘Sond’ (special) appears on the display. Then release the ‘PROG’ button.
• Use the scroller to select the special ‘OFFS’ function.
• Confirm this by briefly pressing the ‘PROG’ button.
• Use the scroller to select the respective valve operating mechanism/radiator.
• Confirm the selected valve operating mechanism by briefly pressing the ‘PROG’ button.
• Set the offset using the scroller.
• Confirm the offset by briefly pressing the ‘PROG’ button. The value that is set is automatically saved, and the FHZ returns
to the normal operating mode.
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You may have to repeat this process several times until the heating power has been optimally distributed.
j) Setting the minimum temperature for the low temperature alarm, ‘t-AL’
You program the minimum temperature for the low temperature alarm as described in section 6. f) item 3.
FHT 8W Heat Demand Relay
Installation and User Guide
Product Code EHC-FH06
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