Specifications include, but are not limited to: Filters will be changed pursuant to the schedule set by the district. Typically, quarterly filter changes with the exception of geothermal heat pump units requiring a monthly filter change. Filter change schedules may be modified at any time by the district and are dependent on available funding, among other factors: Visually inspect air handlers and report needed repairs to DALLAS INDEPENDENT SCHOOL DISTRICT HVAC supervisor. Replace all air filters per manufacturer's recommendations. Verify each air handler has proper number of filters. Provide Estimate to change any and all filters, at all facilities with labor. Filters must be MERV·9 or higher. Filters must be depths loading three ply synthetic media that is moisture and mold resistant. Special Instructions: Review the Safety Training Modules for "Controlling Hazardous Energy Sources". Deenergize, tag and lock out fan motor circuit. The efficiency of all filters used in DALLAS INDEPENDENT SCHOOL DISTRICT controlled space will conform to the requirements of ASHRAE (American Society of Heating, Refrigerating and Air Conditioning Engineers) test method 52.1-92. Review manufacturer's instructions and become familiar with manufacturer's recommended operating velocity. This information will assist in selecting proper efficiencies. De-energize, tag and lock out fan motor circuit.
