Daikin EUWL KZW1 Series, Service Manual

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Pre-Test Run Checks ESIE-0303
4–12 Part 4 – Commissioning and Test Run
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1.7 Setting of the Flow Switch
Functional
description The flow switch protects the evaporator against freezing. It shuts down the unit when the flow of the
unit becomes lower than the minimum allowable flow of the unit.
For units with leaving water applications lower than 5°C, the setting has to be done after installation.
This is because the set point of the flow switch is influenced by the type and concentration of
anti-freeze in the water.
Necessary parts The following parts are necessary in the water system to be able to do a correct setting of the flow
switch (included in P&B-models).
■ Pump
■ Pressure ports before and after pump
■ Water flow regulating valve.
Flow switch The illustration below shows the flow switch.
Components The table below list the main components of the flow switch for regulation.
Flow values The table below contains the values for the flowswitch at 20°C ambient temperature and 20°C water
temperature.
1
2
No. Component Details
1 6 LEDs for visual flow indication ■ 4 green LEDs: degree of set point overrange
(1, 2, 3, 4 green LEDs lit)
■
1 yellow LED: set point reached/overrange
■
1 red LED: set point underrange.
2 Potentiometer Remove protective screw cap to reach
potentiometer.
Unit Value Lower Upper
EUW(L)5KZ 20 l/min -0 l/min +2 l/min
EUW(L)8KZ 33 l/min -0 l/min +2 l/min
EUW(L)10KZ 43 l/min -0 l/min +4 l/min
EUW(L)12KZ 51 l/min -0 l/min +6 l/min
EUW(L)16KZ 66 l/min -0 l/min +4 l/min
EUW(L)20KZ 86 l/min -0 l/min +8 l/min
EUW(L)24KZ 102 l/min -0 l/min +12 l/min