cmc of 26 nos 7tr high precision air-conditioning units of ms emerson make at mhs bhavan pune , comprehensive maintenance of precision package air-conditioning units ( without operation ) as per details given in relevant sections by deploying the required specialized manpower as & when required by arranging required tools and plant etc . to carry out maintenance activities and attend all break down maintenance calls . contractors to take all steps to undertake preventive / special maintenance and testing to keep the system at optimum working a ) services included are: section- i , 7 tr high precision ac units of m / s emerson make .