Learn why maintenance is crucial, follow ASHRAE's S180 standard, manage pressure drop for energy efficiency, maintain air cleanliness, and understand the future of standards. Tips for cost-effective operations, certification guidelines, and focus on enhancing air movement performance. Specifically focused on ASHRAE/ACCA/ANSI S-180 standards for commercial HVAC systems.
Une image / un lien ci-dessous est fourni (tel quel) pour télécharger la présentation
Politique de téléchargement : le contenu du site vous est fourni TEL QUEL pour votre information et votre usage personnel ; il ne peut être vendu, concédé sous licence ni partagé sur d’autres sites sans l’accord de son auteur.Le contenu vous est fourni TEL QUEL, pour votre information et votre usage personnel uniquement.Téléchargez la présentation en cliquant sur ce lien.Lors du téléchargement, si vous ne parvenez pas à télécharger une présentation, l’éditeur a peut-être supprimé le fichier de son serveur.Pendant le téléchargement, si vous ne parvenez pas à obtenir une présentation, le fichier a peut-être été supprimé par l’éditeur.
What we will cover • Why maintenance is so important • ASHRAE’s new HVAC maintenance standard (S180) • What we are trying to maintain • Utilizing the standard • Achieving greater energy efficiency by managing pressure drop • The role of air cleaning • Where the standard is going
ASHRAE ‘Tips’ • Demand accurate design and construction records and understand how the system works • Demand accurate commissioning information; keep records up-to-date. • Change things that don’t work. • Check calibration of sensors against data and common sense. • Look for patterns in occupant complaints and apply cause analysis. • Decide whether to get to know the occupants or stay remote. Establish lines of communication.
Tips (contd.) • Collect key data and use it to plot trends. • Establish energy baseline and sustain performance. • Use qualified well-trained staff. Operations and maintenance cost will exceed construction costs over the life of the building. • Read and apply ASHRAE/ACCA Standard 180, Standard Practice for Inspection and Maintenance of Commercial Building HVAC Systems. • Read and apply Chapter 38 of the ASHRAE Handbook, HVAC Application. • Take the test and obtain ASHRAE OPMP Certification.
Especially Important • Collect key data and use it to plot trends. • Establish energy baseline and sustain performance.
Impact on Performance • Adequate – high efficiency • Lacking – compromised performance
ASHRAE/ACCA/ANSI S-180 • Title • Standard Practice for Inspection and Maintenance of Commercial Building HVAC Systems
Commercial Buildings (definition) • Buildings shall include, but are not limited to governmental and educational facilities, healthcare, hospitality, institutions, offices, places of assembly, restaurants, retail, and wholesale.
Standard 180 • Purpose • The purpose of this standard is to establish minimum HVAC inspection and maintenance requirements that preserve a system’s ability to achieve acceptable thermal comfort, energy efficiency, and indoor air quality in commercial buildings.
Standard 180 • Scope • This standard provides minimum requirements for the HVAC system inspection and maintenance practice in new and existing buildings. Where specifically noted in this standard, different requirements apply.
Airside Performance Issues? If so important, why so many: • Air leaks • Infiltration • Air flow volume • Restrictions (filters; coils) • Fans • Dampers • Controls • …
Possible Reasons • Lack of personnel • Training/knowledge • Data • Salesmanship • People not motivated to change!
Standard 180 and Air CleaningKey Tasks - • Check for particulate accumulation on filters. Clean or replace if accumulation results in pressure drop or airflow outside of established operating limits. • Monthly
Standard 180 and Air CleaningKey Tasks - • Check for particulate accumulation on filters. Clean or replace if accumulation results in pressure drop or airflow outside of established operating limits. • Monthly • Check air filter and housing integrity. Correct as needed. • At filter change
Standard 180 and Air CleaningKey Tasks - • Check for particulate accumulation on filters. Clean or replace if accumulation results in pressure drop or airflow outside of established operating limits. • Monthly • Check air filter and housing integrity. Correct as needed. • At filter change • Check integrity of all panels on equipment. Replace fasteners as needed to ensure proper integrity and fit/finish of equipment. • Annually
Standard 180 and Air CleaningOther Related - • Visually inspect grilles, registers and diffusers for dirt accumulation. Clean as needed to remove dirt build up • Simi-annually • Inspect for evidence of moisture carryover beyond the drain pan from cooling coils. Make corrections or repairs as necessary. Visually inspect areas of moisture accumulation for biological growth. If present, clean or disinfect as needed. • Annually • Visually inspect internally lined ductwork until the first turn or up to 20 feet into the supply plenum from air handler for visible biological contamination, and take corrective action. • Annually
Standard 180 and Air CleaningIndicators - • Check for proper operation of cooling or heating coil. Clean, restore or replace as required. • Simi-annually • Check coil fins for evidence of build-up or fouling. Restore if possible. Replace coil if necessary to return to proper functioning. • Annually • Check fan blades. Clean, repair or replace as needed to ensure proper operation. • Annually • Check for fouling, corrosion or degradation. Clean or repair as needed. • Annually • Inspect for evidence of moisture carryover beyond the drain pan from cooling coils. Make corrections or repairs as necessary. • Annually
TasksVary – Simple to Complex • Visually inspect grilles, registers and diffusers for dirt accumulation. Clean as needed to remove dirt build up • Check control system and devices for evidence of improper operation. Repair, adjust or replace components to ensure proper operation
