Limerick Fire Department was dispatched to Pottstown for RIT assignment at a building fire. Once onsite, crews set up for RIT. As the fire was marked under control, Pottstown command requested Rescue 51 to respond to a CO alarm on the west side of the borough. Once at the CO call, crews screened the building with meters and consulted with the building's occupants. While on scene of the CO alarm, Rescue 51 was dispatched to an ambulance assist call located near by.