Toshiba HFC R-410A manual Capacity calculation for each indoor unit, Operating temperature range

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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