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9. Function 2
9-1 External Temperature Interlock
The purpose of this function is to avoid heat shock (physical shock caused by the extreme temperature difference when entering into a
building) during cooling operation. It adjusts the setting temperature in order to lower the temperature difference between indoor and
outdoor. To use this function, make a setting for AI controller on the “Measurement” under “Function 1”.
Note: Connect our AI controller (PAC-YG63MCA) to measure outside temperature.
Note: This function works when the operation mode is [cooling] or [dry].
Note: This function works for air conditioning unit group, but not for LOSSNAY, Air To Water (PWFY), or general equipment.
Note: When temperature are displayed in Fahrenheit, +2, +4, +6, +8°F may not properly be displayed b1, +2, +3, +4°C Control
is excuted and then Celsius temperature is converted into Fahrenheit temperature inside the controller.
Outside air temperature
Setting temperature after interlock
[Preset tempe 1.4°C / + 2.5°F] or below
Preset temperature
[Preset tempe 1.5°C / + 2.7°F] - [Preset tempe 4.4°C / + 7.9°F]
Preset tempe 1°C / + 2°F
[Preset tempe 4.5°C / + 8.1°F] - [Preset tempe 6.4°C / + 11.5°F]
Preset tempe 2°C / + 4°F
[Preset tempe 6.5°C / + 11.7°F] - [Preset tempe 7.4°C / + 13.3°F]
Preset tempe 3°C / + 6°F
[Preset tempe 7.5°C / + 13.5°F] or above
Preset tempe 4°C / + 8°F
29
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32
33
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36
27
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23
Te
mp
er
at
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e (°C
)
Outside air temperature
Setting temperature after interlock
Preset temperature
Time
WT05369X15.book Page 87 Wednesday, November 7, 2012 10:33 AM