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8.4 Adjusting the flow rate
!
CAUTION
Material damage!
Flowmeter must not be used to adjust the flow rate.
1. Remove the protective cap on the relevant heating circuit and
close the valve with a air vent key by turning it clockwise (=
min. setting).
HKV2013AF-IM-DE-W-UK-03-2023-Rev.2 | Part no. 10086671
2. Adjust the flow rate by turning the regulating spindle anticlock-
wise on the return valve. The actual value can be read from
the flow meter. Do not use the flow meter to adjust the flow.
Once all the circuits have been set, check the flow values and
readjust if necessary.
3. The fine thread of the adjusting spindle must not be visible
above the edge of the AF19 hexagonal nut! Once it is closed,
the valve is open (full flow) after 2.5 to 3 turns anticlockwise.
4. The protective cap or the actuator should be screwed back on
once the adjustment work is complete. This prevents the
valves from accidental adjustment and from getting dirty.
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