Panasonic (WH-UD12CE5-A-1, Service Manual

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15.5 How to Adjust Water Flow Rate
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Before adjust the water flow rate, make sure that the total water volume in the installation is 50 litres minimum.
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The water flow rate can be adjusted with select the water pump speed on the water pump. The default setting is
moderate speed (II). However, please ensure the minimum flow rate cannot be less than 18L/min. Adjust it to
high speed (III) and slow speed (I) if necessary (e.g. reduce the noise of running water).
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Below graph shown the external static pressure (kPa) versus water flow rate (L/min).
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Flow rate characteristic of indoor unit is as per above mentioned.
15.6 Expansion Vessel Pre Pressure Checking
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Expansion Vessel with 10L air capacity and initial pressure of 1 bar is installed in this indoor unit.
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Total amount of water in system should be below 200L.
(Note: This amount of water is not include the tank unit volume)
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If total amount of water is over 200L, please add expansion vessel.
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Please keep the installation height difference of system water circuit within 10m.
(Inner volume of same indoor unit is about 5L)