Control Specification
SiBE041012_A
37
Function and Control
3.3
Controls at Mode Changing / Start-up
3.3.1 Preheating Operation
Outline
The inverter operation in open phase starts with the conditions of the preheating command from
the indoor unit, the outdoor temperature, and the discharge pipe temperature.
Detail
25/35 Class
Outdoor temperature
≥
7°C
→
Control A
Outdoor temperature < 7°C
→
Control B
Control A
ON condition
Discharge pipe temperature < 10°C
OFF condition
Discharge pipe temperature > 12°C
Radiation fin temperature
≥
90°C
Control B
ON condition
Discharge pipe temperature < 20°C
OFF condition
Discharge pipe temperature > 22°C
Radiation fin temperature
≥
90°C
50 Class
Outdoor temperature
≥
10°C
→
Control A
Outdoor temperature < 10°C
→
Control B
Control A
ON condition
Discharge pipe temperature < 6°C
OFF condition
Discharge pipe temperature > 8°C
Radiation fin temperature
≥
90°C
Control B
ON condition
Discharge pipe temperature < 10.5°C
OFF condition
Discharge pipe temperature > 12°C
Radiation fin temperature
≥
90°C
