SiBE04-809 Control Specification
Function and Control 31
3.3 Controls at Mode Changing / Start-up
3.3.1 Preheating Operation
Outline Operate the inverter in the open phase operation with the conditions including the preheating
command, outdoor air temperature and discharge pipe temperature from the indoor side.
Detail Outside temperature
≥
10°C
→
Control A (preheating for normal state)
Outside temperature < 10°C
→
Control B (preheating of increased capacity)
Control A
ON condition
Discharge pipe temperature < 10°C
Fin temperature < 85°C
OFF condition
Discharge pipe temperature > 12°C
Fin temperature
≥
90°C
Control B
ON condition
Discharge pipe temperature < 20°C
Fin temperature < 85°C
OFF condition
Discharge pipe temperature > 22°C
Fin temperature
≥
90°C
Note: The power consumption of compressor during preheat operation is 35 W.
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