Bryston 4bst - fast or slow blow fuses?

Hoping for some quick info on the 'gon. The manual for this amp doesn't specify whether the fuses should be fast of slow blow. The chassis specifies 3AG7A 250V. I take it this means a 3AG fuse (they seem to come in fast and slow blowing), 7 amps, 250 volts. Anyone know whether I should use fast or slow blow?

Thanks, Peter S.