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Capacity correction for frosting on the outdoor heat exchanger (heating mode)
Correct the heating capacity when frost was found on the outdoor heat exchanger.
Heating capacity = Capacity after correction of outdoor unit × correction value of capacity resulting from frost
(Capacity after correction of outdoor unit: Heating capacity calculated in the previous
section.)
Capacity correction for frosting on the outdoor heat exchanger
Capacity correction value
Outdoor air wet bulb temperature (°C)
Capacity calculation for each indoor unit
Capacity for each indoor unit =
Capacity after correction of outdoor unit ×
Operating temperature range
In cooling mode In heating mode
Required standard capacity of indoor unit
Total value of standard indoor unit capacity
Usable range
(in pull-down mode)
Usable range
(in warming-up mode)
Rated conditions
Cooling: Indoor air temperature 27°C db/19°C wb.
Outdoor air temperature 35°C db.
Heating: Indoor air temperature 20°C db.
Outdoor air temperature 7°C db/6°C wb.
Outdoor air dry bulb temperature (°C)
Indoor air wet bulb temperature (°C)
Continuous
operating
range
Outdoor air wet bulb temperature (°C)
Indoor air dry bulb temperature (°C)
Continuous
operating
range
The unit can be operated even if outdoor
temperature falls to -20°C. However, the warranty
only covers operation down to -15°C, as lower
temperatures are outside the operating range.
When the outdoor air temperature falls to below
-15°C, unit operation may reduce the product life.