Assertion: alarm | /r/AtLocation | associated control room
Facets:
Source sentences:
text: Phases of operation include primary recall (typically the ground level), alternate/secondary recall (typically a floor adjacent to the ground level – used when the initiation occurred on the primary level), illumination of the "fire hat" indicator when an alarm occurs in the elevator hoistway or associated control room, and in some cases shunt trip (disconnect) of elevator power (generally used where the control room or hoistway is protected by fire sprinklers).