Toshiba TOSNUC 92 Connection Manual page 38

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Here, estimation of air quantity is sometimes difficult depending on the layout of air

duct. Therefore, actually obtain the required air quantity from the radiation volume

and temperature difference, then choose a fan motor whose maximum air quantity

is 1.5 to 2 times the obtained air quantity.

Heating

unit

Fig. 3.5.2 Air duct in the cabinet of outside air intake type

Notes:

In setting the air duct, take care that the air should not bypass the part with less

air resistance as shown in the figure above.

2) More uniform cooling is possible if the fan motor is mounted on the exhaust side.

(Try to make the air speed as constant as possible.)

Any obstacle near the fan motor can reduce the air quantity and deteriorate the

cooling capacity.

– 38 –

Duct

STE 73843

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