Specifications include, but are not limited to: A. Repairs or Replacement. The Contractor shall furnish all labor, materials, equipment, tools and supervision necessary for HVAC and related services at all City of Lawrence buildings as directed by the City. All work shall be performed by licensed HVAC Technician holding an “unrestricted” oil burner license in accordance with M.G.L. c.148. • HVAC. The Contractor shall be expected to perform routing and emergency HVAC repairs at all city and school buildings under the control of the City. HVAC services include, but are not limited to, dual temp systems and refrigeration recovery, reciprocating equipment, building automation controls, Unitary controls and any other HVAC related equipment. B. State/Insurance Inspections. It will be the Contractors responsibility to assure state and insurance inspections are carried out yearly. C. Preventative Maintenance (Chillers, Cooling Towers & Roof Top Units). The Contractor shall perform annual and semiannual preventative maintenance measures to assure proper operation and extend the lifecycle of the equipment. This shall include but not be limited to: • Semi-Annual (chillers) – Clean condenser tubes; change oil filters; change driers and VSD fluid; provide a hydrogen peroxide flush on drive coolant loops; clean VSD heat exchangers; inspect all electrical components and connections. • Semi-Annual (cooling towers) – clean cooling tower and clean condenser pump strainers. • Semi-Annual (rooftop units) – Contractor shall perform the following on an annual basis prior to the cooling or heating season: Check all belts Check fan motors and grease bearings where applicable, adjust pulleys Machine clean all evaporator and condenser coils Check compressors for refrigerant and/or oil Check and tighten all electrical connections and fuses Check all actuators and dampers for operation, grease where applicable Check all filters Check operation of all VSD drives for proper operation Where applicable, check operation of automated controls, summer/winter switchover Check all safeties and door interlocks Check to see all door panels are secure Check natural gas pressure at unit, ensure gas combustion section is working properly, gas igniter is working properly Check for any natural gas leaks or cracked heat exchangers Check to see all condensate drains are clear.
