{"id":1598,"date":"2023-11-15T02:12:47","date_gmt":"2023-11-15T02:12:47","guid":{"rendered":"https:\/\/ultbrand.co.uk\/?p=1598"},"modified":"2024-09-18T10:37:06","modified_gmt":"2024-09-18T07:37:06","slug":"ahu-haftalik-ila-3-yil-arasini-kapsayan-onleyici-bakim-kontrol-listesi","status":"publish","type":"post","link":"https:\/\/tekvent.com.tr\/en\/ahu-haftalik-ila-3-yil-arasini-kapsayan-onleyici-bakim-kontrol-listesi\/","title":{"rendered":"AHU | Preventive Maintenance Checklist Covering Weekly to 3-Year Intervals"},"content":{"rendered":"
<\/p>\n

To ensure that any installed air handling unit [AHU] is well-maintained, operates efficiently, and continues to meet design requirements even years after installation, it should be inspected, tested, and maintained at the following intervals:<\/p>\n

    \n
  • Weekly<\/li>\n
  • Monthly<\/li>\n
  • 6 months<\/li>\n
  • 12 months<\/li>\n
  • 24 months<\/li>\n
  • 36 months<\/li>\n<\/ul>\n

    There are 8 key reasons to conduct regular maintenance. Not having a simple, detailed, and regular maintenance program can significantly affect the operation, failures\/wear and tear, and energy usage of the unit:<\/p>\n

      \n
    • Higher failure rates of equipment and components, increasing overall costs and maintenance\/repair requirements.<\/li>\n
    • Higher operating costs as the fan motor works harder to push air through unmaintained filters and coils.<\/li>\n
    • Coils cannot function at peak efficiency, operational conditions, and performance specifications.<\/li>\n
    • Additional complaints from building occupants due to affected comfort levels caused by filters, coils, controls, and valves not working as designed.<\/li>\n
    • Odors and general indoor air quality issues due to dirty filters, coils, and drainage pans.<\/li>\n
    • Damage to existing installations, such as ceilings and walls being soiled by airborne dirt particles, often visible as dirty streaks.<\/li>\n
    • Fire risk due to the accumulation of potential flammable materials inside the ductwork.<\/li>\n
    • Early detection and resolution of issues help maintain a more efficient system.<\/li>\n<\/ul>\n

      The following article will cover a typical preventive maintenance regime for the AHU and some of its associated equipment.<\/p>\n

      \n

      \ud83d\udfe9 Who Will Complete the Inspections and Maintenance?<\/strong><\/p>\n

      If the building is still under construction or within the defect liability period, the general\/main contractor will be responsible for the maintenance.
      If the building\/system is beyond the defect liability period, the maintenance will be completed by the building facility manager\/operator.<\/p>\n

      \n

      \ud83d\udfe9 Parts and Components to be Inspected:<\/strong><\/p>\n

        \n
      • Air Inlet and Plenum<\/li>\n
      • General Ductwork<\/li>\n
      • Attenuators<\/li>\n
      • AHU Frame and Casing<\/li>\n
      • Dampers<\/li>\n
      • Mixing Box<\/li>\n
      • Filters<\/li>\n
      • Frost Coils<\/li>\n
      • Blower Fan and Direct Drive Motor<\/li>\n
      • Vibration Mounts<\/li>\n
      • Electrical Isolators<\/li>\n
      • Emergency Stop<\/li>\n
      • DX System Compressor<\/li>\n
      • DX System Evaporator<\/li>\n
      • DX Condenser<\/li>\n
      • CHW Cooling Coil<\/li>\n
      • Condensate Tray and Drainage System<\/li>\n
      • LTHW Heating Coil<\/li>\n
      • Electric Heater<\/li>\n
      • Steam Generator<\/li>\n
      • Humidifier<\/li>\n
      • Heat Exchanger\/Thermal Wheel<\/li>\n
      • Pumps<\/li>\n
      • Control Valves<\/li>\n
      • Actuators<\/li>\n
      • Pressure Sensors<\/li>\n
      • Temperature Sensors<\/li>\n
      • Thermostats<\/li>\n
      • CO2 Sensor<\/li>\n
      • Smoke Detector<\/li>\n
      • Variable Speed Drive<\/li>\n
      • AHU Control Panel<\/li>\n
      • Air Terminal Devices<\/li>\n
      • External DX Unit<\/li>\n<\/ul>\n
        \n

        \ud83d\udfe9 Routine Maintenance Program:<\/strong><\/p>\n

        Routine inspections and timing will be divided according to the following intervals\/schedule:<\/p>\n

          \n
        • Weekly inspections<\/li>\n
        • Monthly inspections<\/li>\n
        • Quarterly inspections (every 3 months)<\/li>\n
        • Semi-annual inspections (every 6 months)<\/li>\n
        • Annual inspections (every 12 months)<\/li>\n
        • Biennial inspections (every 24 months)<\/li>\n
        • Triennial inspections (every 36 months)<\/li>\n<\/ul>\n
          \n

          \ud83d\udfe9 Weekly Inspection Checklist:<\/strong><\/p>\n

          Task Type<\/strong><\/p>\n

            \n
          • W-1 Inspect the unit: Observe and inspect the unit for any changes in operating conditions. Investigate further if any are noted.<\/li>\n
          • W-2 Inspect the unit: Listen for unusual noises. Investigate further if any are noted.<\/li>\n
          • W-3 Inspect the setpoint: Visually check the temperature setting to ensure it meets design\/operational needs. Investigate the cause and reset if no reason is provided. Changes may impact the building’s energy use.<\/li>\n
          • W-4 Inspect the steam generator: Check for damage and leaks.<\/li>\n
          • W-5 Inspect the steam humidifier: Check for any damage or leaks.<\/li>\n
          • W-6 Inspect the steam humidifier: Visually check water levels.<\/li>\n
          • W-7 Inspect the steam humidifier: Visually inspect the general steam installation and supply pipes for any damage or leaks.<\/li>\n
          • W-8 Inspect the steam humidifier: Visually inspect the drain pipes for blockages and clogs.<\/li>\n
          • W-9 Inspect the steam humidifier control panel: Visually inspect electrical connections, components, and wires for damage\/issues.<\/li>\n<\/ul>\n
            \n

            \ud83d\udfe9 Monthly Inspection Checklist:<\/strong><\/p>\n

            Task Type<\/strong><\/p>\n

              \n
            • 1M-1 Inspect filters: Visually inspect the filter for dust, debris, foreign objects, moisture, and odors. Replace if it smells or contains moisture.<\/li>\n
            • 1M-2 Inspect filters: Visually inspect the filter frames and rails for contamination, foreign objects, corrosion, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
            • 1A-3 Inspect filters: Take readings from differential pressure devices\/BMS on the filters. Replace or clean if the maximum pressure difference is exceeded.<\/li>\n
            • 1A-4 Inspect strainer: Remove the strainer mesh and check for contamination, foreign objects, corrosion, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
            • 1A-5 Measure steam humidifier: Take samples and analyze the water quality and conductivity servicing the steam equipment to ensure it meets the manufacturer\u2019s requirements. Investigate any issues and take corrective measures.<\/li>\n<\/ul>\n
              \n

              \ud83d\udfe9 Quarterly (3-month) Inspection Checklist:<\/strong><\/p>\n

              Task Type<\/strong><\/p>\n

                \n
              • 3M-1 Inspect the unit: Visually inspect the internal and external cleanliness of the unit. Perform corrective actions if anything is noted.<\/li>\n
              • 3M-2 Inspect fan motor: Check belts and pulleys for tension and wear in accordance with the manufacturer\u2019s requirements. Investigate any issues and take corrective measures.<\/li>\n
              • 3M-3 Inspect fan motor: Inspect motor bearings for vibration, noise, overheating, and lubrication. Perform corrective action\/lubrication if necessary.<\/li>\n
              • 3M-4 Measure chilled water: Take samples and analyze the water quality servicing all wet coils to ensure it meets the original design requirements. Investigate any issues and take corrective measures.<\/li>\n
              • 3M-5 Measure heating water: Take samples and analyze the water quality servicing all wet batteries to ensure it meets the original design requirements. Investigate any issues and take corrective measures.<\/li>\n
              • 3M-6 Inspect frost coil: Visually inspect for contamination, foreign objects, corrosion, leaks, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
              • 3M-7 Inspect cooling coil: Visually inspect for contamination, foreign objects, corrosion, leaks, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
              • 3M-8 Inspect evaporator: Visually inspect for contamination, foreign objects, corrosion, leaks, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
              • 3M-9 Inspect evaporator: Visually inspect for any ice formation. Perform corrective action if anything is noted.<\/li>\n
              • 3M-10 Inspect condenser: Visually inspect for contamination, foreign objects, corrosion, leaks, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
              • 3M-11 Inspect compressor: Check oil levels to ensure they meet the manufacturer\u2019s requirements. Perform corrective action if anything is noted.<\/li>\n
              • 3M-12 Inspect condensate drain: Visually inspect the tray for contamination, foreign objects, corrosion, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
              • 3M-13 Scale condensate drain tray: Perform a flow test on the drain tray, holder, and piping system. Perform corrective action if anything is noted.<\/li>\n
              • 3M-14 Inspect heating coil: Visually inspect for contamination, foreign objects, corrosion, leaks, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
              • 3M-15 Inspect thermal wheel: Visually inspect for contamination, foreign objects, corrosion, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
              • 3M-16 Inspect thermal wheel: Visually inspect all seals for contamination, foreign objects, corrosion, damage, and wear and tear. Clean or replace if any issues are noted.<\/li>\n
              • 3M-17 Inspect thermal wheel: Check bearing clearance, lateral movement, or imbalance. Perform corrective action if anything is noted.<\/li>\n
              • 3M-18 Inspect thermal wheel: Inspect motor bearings for vibration, noise, overheating, and lubrication. Perform corrective action\/lubrication if necessary.<\/li>\n
              • 3M-19 Inspect thermal wheel: Inspect belts and pulleys for tension and wear in accordance with the manufacturer\u2019s requirements. Investigate any issues and take corrective measures.<\/li>\n
              • 3M-20 Inspect thermal wheel: Visually inspect motor connections for wear and tear\/issues. Perform corrective action if necessary.<\/li>\n
              • 3M-21 Inspect thermal wheel: Inspect the drive components of the unit. Perform corrective action if anything is noted.<\/li>\n
              • 3M-22 Inspect thermal wheel condensate drain: Visually inspect the tray for contamination, foreign objects, corrosion, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
              • 3M-23 Scale thermal wheel condensate drain tray: Perform a flow test on the drain tray, holder, and piping system. Perform corrective action if anything is noted.<\/li>\n
              • 3M-24 Scale thermal wheel: Test the heat exchanger to ensure it rotates and functions in accordance with the manufacturer\u2019s requirements. Perform corrective action if anything is noted.<\/li>\n
              • 3M-25 Inspect steam humidifier: Visually inspect the general operation of the equipment, including the spray head, pumps, control panel, and drainage. Perform corrective action if anything is noted.<\/li>\n<\/ul>\n
                \n

                \ud83d\udfe9 Semi-Annual (6-month) Inspection Checklist:<\/strong><\/p>\n

                Task Type<\/strong><\/p>\n

                  \n
                • 6M-1 Scale filters: Measure the pressure difference across all filters in the unit using a calibrated device, cross-referenced with the BMS. Adjust the setpoint if a difference is noted. Replace or clean if the maximum pressure difference is exceeded.<\/li>\n
                • 6M-2 Inspect attenuator: Visually inspect the inside and outside for contamination, foreign objects, corrosion, damage, and wear and tear. Perform corrective action if anything is noted.<\/li>\n
                • 6M-3 Inspect air mixing box: Visually inspect for contamination, foreign objects, corrosion, damage, and wear and tear. Perform corrective action if anything is noted.<\/li>\n
                • 6M-4 Scale air mixing box: Move damper blades to ensure they do not stick, get damaged, or move incorrectly. Perform corrective action if anything is noted.<\/li>\n
                • 6A-5 Inspect air mixing box: Inspect damper bearings and connections for issues. Perform corrective action if anything is noted.<\/li>\n
                • 6M-6 Inspect fan blades: Manually turn the fan to check for obstructions or issues. Perform corrective action if anything is noted.<\/li>\n
                • 6M-7 Inspect fan motor: Visually inspect motor mounts and brackets for torque and wear and tear in accordance with the manufacturer\u2019s requirements. Perform corrective action if necessary.<\/li>\n
                • 6M-8 Inspect fan motor: Check the alignment of the motor and shafts. Perform corrective action if necessary.<\/li>\n
                • 6M-9 Inspect fan blades: Check for misalignment, imbalance, vibration, contamination, foreign objects, corrosion, and damage. Perform corrective action if necessary.<\/li>\n
                • 6M-10 Inspect equipotential bonding: Inspect the unit, parts, and components for bonding. Perform corrective action if anything is noted.<\/li>\n
                • 6M-11 Inspect compressor: Visually inspect connections and vibration components. Perform corrective action if necessary.<\/li>\n
                • 6M-12 Inspect electric heater: Visually inspect for contamination, foreign objects, corrosion, and damage. Clean or inspect\/perform corrective action if anything is noted.<\/li>\n
                • 6M-13 Scale electric heater: Test the operation and function of the heater to ensure it works in accordance with the design and manufacturer\u2019s requirements. Perform corrective action if necessary.<\/li>\n
                • 6M-14 Inspect steam humidifier: Drain the steam cylinder and clean the lime trap.<\/li>\n
                • 6A-15 Inspect control valves: Visually inspect to ensure they are free of damage, contamination, or rust. Perform corrective action if necessary.<\/li>\n
                • 6M-16 Inspect actuators: Visually inspect to ensure they are connected, and free of damage, contamination, or corrosion, including cables and connections. Perform corrective action if necessary.<\/li>\n
                • 6M-17 Inspect temperature sensors: Visually inspect to ensure they are clean, free of damage, rust, or contamination, including cables. Perform corrective action if necessary.<\/li>\n
                • 6A-18 Inspect humidity sensors: Visually inspect to ensure they are clean, free of damage, rust, or contamination, including cables. Perform corrective action if necessary.<\/li>\n
                • 6A-19 Inspect pressure sensors: Visually inspect to ensure they are clean, free of damage, rust, or contamination, including cables. Perform corrective action if necessary.<\/li>\n
                • 6M-20 Inspect thyristors: Visually inspect to ensure they are clean, free of damage, rust, or contamination, including cables. Perform corrective action if necessary.<\/li>\n
                • 6M-21 Inspect smoke detector: Visually inspect to ensure it is clean, undamaged, unworn, or free of contamination. Perform corrective action if necessary.<\/li>\n
                • 6M-22 Inspect time clock: Visually inspect the unit’s time clock settings to ensure they are aligned with the design intent. Perform corrective action if necessary.<\/li>\n
                • 6M-23 Inspect control panel: Visually inspect the interior and exterior, including cable connections, to ensure they are clean, undamaged, and free of wear and tear or contamination. Perform corrective action if necessary.<\/li>\n
                • 6M-24 Scale control panel: Perform a lamp test to ensure they are lit. Perform corrective action if necessary.<\/li>\n
                • 6M-25 Inspect fresh air duct: Visually inspect to ensure it is free and clear and that the flexible connection to the plenum\/grille is in good condition. Perform corrective action if necessary.<\/li>\n
                • 6M-26 Inspect fresh air duct insulation: Visually inspect for damage, tears, and unaffected vapor barriers. Perform corrective action if necessary.<\/li>\n
                • 6M-27 Inspect recirculation air duct: Visually inspect to ensure it is free and clear and that the flexible connection to the unit is in good condition. Perform corrective action if necessary.<\/li>\n
                • 6M-28 Inspect recirculation air duct insulation: Visually inspect for damage, tears, and unaffected vapor barriers. Perform corrective action if necessary.<\/li>\n
                • 6M-29 Inspect supply air duct: Visually inspect to ensure it is free and clear and that the flexible connection to the unit is in good condition. Perform corrective action if necessary.<\/li>\n
                • 6M-30 Inspect supply air duct insulation: Visually inspect for damage, tears, and unaffected vapor barriers. Perform corrective action if necessary.<\/li>\n<\/ul>\n
                  \n

                  \ud83d\udfe9 Annual (12-month) Inspection Checklist:<\/strong><\/p>\n

                  Task Type<\/strong><\/p>\n

                    \n
                  • 12M-1 Inspect inlet grille: Visually inspect for contamination, foreign objects, corrosion, and damage. Perform corrective action if necessary.<\/li>\n
                  • 12M-2 Inspect exhaust grille: Visually inspect for contamination, foreign objects, corrosion, and damage. Perform corrective action if necessary.<\/li>\n
                  • 12M-3 Inspect unit: Visually inspect all screws and bolts to ensure they are tight and secure.<\/li>\n
                  • 12M-4 Inspect unit door seals: Visually inspect for contamination, foreign objects, corrosion, damage, and leaks. Perform corrective action if necessary.<\/li>\n
                  • 12M-5 Inspect unit section seals: Visually inspect for contamination, foreign objects, corrosion, damage, and leaks. Perform corrective action if necessary.<\/li>\n
                  • 12M-6 Inspect unit casing: Visually inspect for moisture or condensation buildup. Perform corrective action if necessary.<\/li>\n
                  • 12M-7 Replace fan motor: Replace all belts. Perform corrective action if necessary.<\/li>\n
                  • 12M-8 Inspect fan motor: Visually inspect electrical connections and torque settings. Perform corrective action if necessary.<\/li>\n
                  • 12M-9 Scale fan motor: Measure the current drawn from the motor during operation and compare it with the equipment manufacturer\u2019s datasheet. Perform corrective action if necessary.<\/li>\n
                  • 12M-10 Scale emergency stop: Test the emergency stop button and its operation. Perform corrective action if necessary.<\/li>\n
                  • 12M-11 Scale safety switches: Test all safety switches and shut down devices. Perform corrective action if necessary.<\/li>\n
                  • 12M-13 Inspect fan blades: Clean the fan, blades, and impeller, remove rust on the shaft, and recoat if necessary.<\/li>\n
                  • 12M-14 Inspect fan blades: Adjust the fan if it rubs.<\/li>\n
                  • 12M-15 Replace filters: Replace 1st stage filters if not previously done.<\/li>\n
                  • 12M-16 Scale filters: Measure the pressure difference across all filters in the unit using a calibrated device, cross-referenced with the BMS. Adjust the setpoint if a difference is noted. Replace or clean if the maximum pressure difference is exceeded.<\/li>\n
                  • 12M-17 Inspect frost coil: Test the coil flow rate with a calibrated device to ensure it meets system design requirements and cross-reference with the BMS where appropriate. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-18 Inspect cooling coil: Test the coil flow rate with a calibrated device to ensure it meets system design requirements and cross-reference with the BMS where appropriate. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-19 Inspect heating coil: Test the coil flow rate with a calibrated device to ensure it meets system design requirements and cross-reference with the BMS where appropriate. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-20 Inspect compressor: Check the rotary lock valves to ensure they move freely. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-21 Inspect compressor: Visually inspect the condition of the oil sump heater. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-22 Inspect compressor: Check the manifold pipes and connections. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-23 Scale compressor: Test the operation of the high-pressure sensor. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-24 Scale compressor: Test the operation of the low-pressure sensor. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-25 Scale compressor: Measure the current and power consumption during operation and compare it with the equipment manufacturer\u2019s datasheet. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-26 Inspect compressor: Check refrigerant charge and oil levels. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-27 Scale evaporator: Test the function of the expansion valve. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-28 Scale condenser: Test the function of the expansion valve. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-29 Inspect cooling system: Check the condition of the safety valve. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-30 Inspect refrigerant system: Check for refrigerant leaks from pipes and connection points. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-31 Inspect steam humidifier: Inspect and clean the steam cylinder. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-32 Inspect steam humidifier: Check and clean the humidifier. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-33 Scale actuators: Inspect and test the function, measure input signals, and check operating and set ranges. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-34 Scale temperature sensors: Check calibration with a calibrated device and cross-reference each sensor with the BMS\/controls. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-35 Scale humidity sensors: Check the calibration of each sensor, cross-referencing with a calibrated device and the BMS\/controls. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-36 Scale pressure sensors: Check the calibration of each sensor with a calibrated device, cross-referencing with the BMS\/controls. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-37 Scale freeze protection thermostat: Check calibration and function with a calibrated device and cross-reference the sensor with the BMS\/controls. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-38 Scale CO2: Check calibration and function with a calibrated device and cross-reference the sensor with the BMS\/controls. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-39 Scale smoke detector: Test and ensure it functions according to the design. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-40 Inspect variable speed drive: Check that operation and settings conform to the design, cross-referenced with the BMS\/controls. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-41 Inspect electrical isolators: Test the function of all isolators [On\/Off]. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-42 Inspect control panel: Visually check cable glands and terminals to ensure they are secure. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-43 Inspect control panel: Check to ensure the wiring diagram is available near or inside the panel. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-44 Inspect control panel: Visually inspect to ensure all protective covers are installed. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-45 Inspect control panel: Test the function of all switches to ensure they work as required. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-46 Scale control panel: Test the control functions of the unit to ensure they operate according to the design intent. Investigate and take corrective action if anything is noted.<\/li>\n
                  • 12M-47 Inspect fresh air duct: Visually inspect two locations along the internal surfaces of the duct for contamination, moisture, condensation, foreign objects, corrosion, and damage. Add other areas, investigate, and perform corrective actions as necessary.<\/li>\n
                  • 12M-48 Inspect supply air duct: Visually inspect two locations along the internal surfaces of the duct for contamination, moisture, condensation, foreign objects, corrosion, and damage. Add other areas, investigate, and perform corrective actions as necessary.<\/li>\n
                  • 12M-49 Inspect return air duct: Visually inspect two locations along the internal surfaces of the duct for contamination, moisture, condensation, foreign objects, corrosion, and damage. Add other areas, investigate, and perform corrective actions as necessary.<\/li>\n
                  • 12M-50 Inspect grilles and diffusers: Clean the terminal devices.<\/li>\n<\/ul>\n
                    \n

                    \ud83d\udfe9 Biennial (24-month) Inspection Checklist:<\/strong><\/p>\n

                    Task Type<\/strong><\/p>\n

                      \n
                    • 24M-1 Replace filters: Replace 2nd stage filters if not previously done.<\/li>\n
                    • 24M-2 Scale fire dampers: Test fire dampers on fresh air, recirculation air, and supply air to ensure they function according to the design.<\/li>\n
                    • 24M-3 Inspect hygiene: Check the AHU for hygienic cleaning [if humidifier installed].<\/li>\n<\/ul>\n
                      \n

                      \ud83d\udfe9 Triennial (36-month) Inspection Checklist:<\/strong><\/p>\n

                      Task Type<\/strong><\/p>\n

                        \n
                      • 36M-1 Inspect hygiene: Check the AHU for hygienic cleaning [if no humidifier installed].<\/li>\n<\/ul>\n
                        \n

                        This concludes the preventive maintenance guide for the AHU.<\/p><\/p>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":2101,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1598","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/posts\/1598","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/comments?post=1598"}],"version-history":[{"count":4,"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/posts\/1598\/revisions"}],"predecessor-version":[{"id":2209,"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/posts\/1598\/revisions\/2209"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/media\/2101"}],"wp:attachment":[{"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/media?parent=1598"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/categories?post=1598"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tekvent.com.tr\/en\/wp-json\/wp\/v2\/tags?post=1598"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}