The startup of booster fan shall meet the following requirements:

(1) manual startup on site.

(2) Automatic startup through automatic fire alarm system.

③ The fire control room is started manually.

④ When any normally closed booster air outlet in the system is opened, the booster fan should be able to start automatically.

Linkage control: the alarm signal of two independent fire detectors or one detector in the fire protection zone where the pressurized air supply outlet is located is linked with a manual fire alarm button, so as to open the air supply outlet and start the pressurized fan.

When the fire in the fire zone is confirmed, it should be possible to open the normally closed pressurized air supply outlet and pressurized blower within 15S. And shall meet the following requirements:

(1) All pressurized fans in the stairwell of the fire zone should be turned on;

(2) Open the fire protection layer in the fire protection zone and its adjacent upper and lower forerooms and shared forerooms, and at the same time open the pressurized fan.