Design of HVAC system and Component

DESIGN Of HVAC SYSTEMS AND elements

HVAC systems ought to be suitably designed and managed throughout their life cycle. 

Documentation like schematic drawings ought to be maintained to replicate this state of affairs, together with however not restricted to, air offer and extraction,air Handling units,room pressure cascades,air flow direction, personnel and material movement,and waste removal.

Risk management principles ought to be applied throughout the planning of AN HVAC system. 

This includes,but isn't restricted to, acceptable controls of the climate and also the presentation of contamination and cross-contamination.

The HVAC system capability ought to be enough to confirm that the desired Performance is maintained throughout traditional use. 

Materials of construction for elements of AN HVAC system shouldn't become a supply of contamination. 

Where potential, Ducting, piping, fittings sensors and different elements ought to be clearly marked or tagged for easy identification, location and direction of flow as acceptable. 

Air intake and exhaust air terminals ought to be positioned in an exceedingly manner in regard to each other that assist in preventing cross-contamination. 

Air-handling units (AHUs) ought to be supplied with adequate drains to get rid of atmospheric phenomenon which will type within the AHU. 

Conditions and limits for parameters like temperature, ratio, air cleanliness and recovery times ought to be mere and achieved,as needed, for the materials and merchandise handled,as can as method Risks. 

Room recovery rates ought to demonstrate that the HVAC system is capable of returning a region to a mere level of cleanliness or classifications, temperature, ratio,room pressure and microbic limits, as acceptable inside the required time. 

Possible space pressure changes because of fan failure and partial system stop working with an effect on easy gap of doors for escape functions ought to be thought-about.

The effectiveness of the air distribution and air flow patterns ought to be acceptable and effective. 

Air offer and extract grilles ought to be suitably situated to supply effective space flushing and stop zones of stagnant air. 

The Performance of HVAC systems ought to be controlled and monitored to confirm in progress compliance with outlined parameters. Records ought to be maintained. Limits outlined ought to be even. 

Where automatic observance systems ar used, these ought to be capable of indicating ANy out - of - Specifications (OOS) condition by means that of an alarm or similar system. wherever these systems ar known as GXP systems. they must be suitably valid. 

Appropriate alarm systems ought to be in situ to alert personnel just in case vital element of the system fails, e.g. a fan.

The result of fan failure on building and HVAC elements ought to be assessed wherever acceptable provision ought to be created for a devotee interlock failure matrix. 

Switching off of AHUs at intervals like long or weekend, or reducing offer air volumes throughout non-production hours, shouldn't compromise product quality wherever this is often done, there ought to be acceptable justification and no risk to materials or merchandise. The procedure and satisfactoriness ought to be tried through Validation and qualification.

There ought to be  procedures and records maintained for the beginning up and stop working sequence of air Handling units.