Daikin FTX25JVEA9 Service Manual page 169

System control
Outside Air Temperature Gas Pipe Lower-Limit Temperature
The motorized valve operating amount is determined based on deviation EGA between each
room unit's gas pipe temperature and of DGAV after GFTUYU correction and previous deviation
EGAZ.
(Example) The following example is based on room A.
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-5
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EGA = DGA - DGAV
When the operating flow rate of EVA is QRGA
QRGA = KPCB (0.05) × ((EGA-EGAZ) + KIB (0.32) × (EGA + EGAZ))
= 0.05 × (EGA - EGAZ) + 0.016 × (EGA + EGAZ)
When QRGA ≤ QHENC(-0.12), the following condition is set: QRGA ≤ QHENC (-0.12 Nm³/
hr).
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Si18-201
Main Functions