Daikin EUWY 24KBZW1 Series, Service Manual

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ESIE11-02 Functional Description
Part 2 – Functional Description 2–17
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1.13 Freeze-up Control: EUWA*5-24KBZW1 and EUWY*5-24KBZW1
Functional
description The freeze-up control is a protection against ice formation in the water circuit at the evaporator outlet.
Characteristics The table below contains the characteristics of the freeze-up protection.
Characteristics for
glycol option The table below contains the characteristics of the freeze-up protection for the glycol option.
Characteristics Freeze-up protection
Control device Sensor
Diagram name R4T
Activation Outlet water temperature < 4°C
Result: The unit is disabled.
Reset Manually on controller if temperature > 7.5°C
(4°C + anti-freeze hysteresis).
Result: The circuit restarts.
ZL Activation Outlet water temperature < -11.5°C
Reset Manually on controller if temperature > -8°C
(-11.5°C + anti-freeze hysteresis).
ZH Activation Outlet water temperature < -6.5°C
Reset Manually on controller if temperature > -3°C
(-6.5°C + anti-freeze hysteresis).