Correction Indoor Fan Speed Factor; Cooling; Heating; Piping Length Correction Factor - Hitachi UTOPIA R32 Series Technical Catalogue

4 Capacities and selection data

Correction indoor fan speed factor

4.5 Correction indoor fan speed factor

4.5.1 Cooling

The tables are based on High speed of indoor fan. To calculate the cooling capacity of medium or low speed of indoor
fan, multiply cooling capacity of high speed by correction indoor fan speed factor.

4.5.2 Heating

The tables are based on High speed of indoor fan. To calculate the cooling capacity of medium or low speed of indoor
fan, multiply cooling capacity of high speed by correction indoor fan speed factor.
The tables does not include decreasing capacity by defrosting operation.
4.6 Piping length correction factor (f
The correction factor is based on the equivalent piping length in meters (EL) and the height between outdoor and indoor
units in meters (H).
H: Height between indoor unit and outdoor unit (m).
• H>0: Position of outdoor unit is higher than position of indoor unit (m).
• H<0: Position of outdoor unit is lower than position of indoor unit (m).
L: Actual one-way piping length between indoor unit and outdoor unit (m).
EL: Equivalent one-way piping length between indoor unit and outdoor unit (m).
• One 90º elbow is 0.5 m.
• One 180º bend is 1.5 m.
• One Multi-kit is 0.5 m.
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N O T E
In order to ensure correct unit selection, consider the farthest indoor unit.
57 TCGB0136 rev.1 - 05/2021
Outdoor unit HP
Indoor unit fan speed
High
Medium
Low
Outdoor unit HP
Indoor unit fan speed
High
Medium
Low
, f
LC LH
3 - 6
1.00
0.98
0.95
3 - 6
1.00
0.98
0.97
)
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