Preventive maintenance work to for Heating Units shall include but not limited to the following: 1. All safety devices will be cleaned, overhauled and adjusted as necessary. 2. All furnaces and heat exchangers will be cleaned and inspected. 3. All controls will be checked, cleaned and calibrated. 4. All electrical connections will be inspected and tightened if required. 5. All corroded components of the heating system will be cleaned and reported. 6. All units will be started and run through a complete heating cycle to ensure trouble-free operations. 7. All heating equipment will be fired, tested and adjusted for maximum efficiency. 8. All burner assemblies will be cleaned and adjusted as specified by the manufacturers’ specifications. 9. All filters will be replaced with pleated filters twice a year, once during the annual service and the second from January 1 to February 1. 10. All motors, bearing, valves and other equipment requiring lubrication will be cleaned, lubricated and adjusted. 11. All motors, pumps, fans couplings, seals and mounts will be inspected and adjusted. 12. Drive belts will be inspected and replaced as required. 13. Defective and inoperative equipment will be identified and reported immediately to Contract Administrator...