AIR HANDLING UNIT FUTURE
INSTRUCTIONS FOR OPERATION AND MAINTENANCE
Air ow meter FIZM
2017-02-13 V. 2.0 45
14. AIR FLOW METER FIZM
CAUTION
Install and connect the air flow meter, according to the manufacturer’s instructions. For
detailed component manufacturer’s operating and maintenance instructions, please refer
to our website at http://www.koja.fi/fi/rakennukset/tukimateriaalit/ilmankaesittelykoneet
CAUTION
On the HK Instruments’ DPT-Flow flow transmitter, select the Common Probe operation
mode independent of the fan type. Set the K-factor, according to the information on the fan
plate. For air flow unit, select m3/s.
CAUTION
The accuracy of the air flow measurement is ±10%
If the air flow meter indication is incorrect, check the following:
• That the hoses are in place and intact.
• That the hoses are not flattened out.
• That there are no blockages in the hoses or pressure joints.
• Indicator air flow meter: that the air flow meter has been reset and the reset screw plug has been
closed properly (see figure Reset screw plug on the air flow meter).
• Indicator air flow meter: that the air flow meter scale corresponds with the fan size.
• That the hoses are connected correctly:
• FFTK fan sizes 022…100 from the measuring ring of the fan to the “–” joint and from the casing to
the “+” joint.
• FFTK fan sizes 112…140 from the measuring pipe (q-DYSA) of the fan according to the figure Mea-
suring pipe q-DYSA on the fan FFTK.
• Depending on the model, the calibration of the digital meter is either manual or automatic. Take
care of the calibration of the meter and other maintenance work according to the manufacturer’s
instructions.
Screw plug on the air flow meter Measuring pipe q-DYSA on the fan
FFTK
Digital air flow meter
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