Danfoss HDU-SF Service Manual page 12

Service Guide
Installing a new Heat Meter
1. Install the brass part, use 2 new flat gaskets and remember backstop
to prevent the ball valves from loosening. Make sure the arrow is
placed in accordance with the flow direction.
2. Slide the Heat Meter electronic onto the bracket.
3. Handle the temperature sensors with care! Make sure that the sensor
is inserted as deep as possible in the manifold pocket and secured
with the Allen screw.
Please note! Check function of the new Heat Meter
The Heat Meter will only measure energy if the pipes are completely filled with water, otherwise a corresponding error message (E - 7) is
shown in the display.
Check the flow rate and temperature display for plausibility. If the flow rate display is not steady, bleed the system.
Error messages for wrong installation
E - 3: Temperature sensors reversed during installation or connection.
E - 6: Heat Meter has not been installed in the intended flow direction.
12
HDU-SF (Horizontal Distribution Units - Single Flat)
VIIGB102
1. Arrow indication direction
2. Direction of flow
Danfoss Heating Solutions