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 × Required standard capacity of indoor unit

Total value of standard indoor unit capacity

Operating temperature range

 

In cooling mode

 

 

(°C)

 

rangeUsable

mode)down-pull(in

temperaturebulbdry

Continuous

 

 

 

 

operating

 

 

 

range

 

 

Outdoor air

 

 

 

Indoor air wet bulb temperature (°C)

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.

In heating mode

(°C)

 

 

 

Outdoor air wet bulb temperature

Usable range

(in warming-up mode)

Continuous

operating

range

 

Indoor air dry bulb temperature (°C)

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.

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Toshiba HFC R-410A Capacity calculation for each indoor unit, Operating temperature range, Rated conditions, Heating mode