Title: Instructions manual - THGT fan.pdf
4.7 THGT fan motors may be dual purpose for S1 duty cycle and one off emergency high temperature smoke operation, or dedicated one off emergency high temperature smoke operation, at the stated temperature, after which the complete fan should be replaced. Manufactures of motors used with THGT fans provide guidance for winding life, and more information can be found in specific motor O+M Instructions supplied with the fan.5. Special instructions / operation5.1 In absence of any specific guidance, installer should assume there will be some air leakage, into or out, of all fans and ductwork. This may emanate from flange connections, access doors, joints etc. The degree of leakage may increase with higher pressure inside fan casing or duct.6. Maintenance