In conclusion, every air conditioner is different and all manufacturers have different requirements for the installation of their products. Contractors should check with the manufacturer or review the installation manual before installing any air conditioning units to ensure the system has an adequate power supply to operate at its optimum efficiency.
Electrical connection. Articles News Products Features Contributors. Known as Amendment 2, it was released in December and is the first update since July How did this amendment come about? To avoid any wasted costs, we highly recommend arranging a Daikin Specialist Dealer to come to your home and carefully assess your property.
They will be able to advise on the best location to install your unit both inside and outside. Q2: Which rooms or spaces do you want air-conditioned? The answer is simple. Remember hot air rises and cool air sinks to the bottom of each room, so having your air conditioner installed in the right position will help to ensure air circulates more evenly.
For maximum efficiency, it should also be located within approximately 15 metres of an indoor air outlet. A Daikin Specialist Dealer can explain in detail how the location of your outdoor unit will affect efficiency, noise levels, and performance. Likewise, it may be more appropriate that fume hoods in some situations operate on a reduced flow while in other situations operate at full flow. A Performance Solution may be considered more appropriate in such situations. The requirements do not apply to a miscellaneous exhaust system serving a sole-occupancy unit in a Class 2, 3 or 9c building.
There is an exemption for situations where the exhaust system must balance the intake of outside air required for ventilation. The exemption recognises that the required minimum ventilation rates take precedence over energy efficiency measures.
There is also an exemption in J5. Fans, ductwork and duct components that form part of an air-conditioning system or mechanical ventilation system must—. Fans in systems that have a static pressure of not more than Pa must have an efficiency at the full load operating point not less than the efficiency calculated with the following formula:. Fans in systems that have a static pressure above Pa must have an efficiency at the full load operating point not less than the efficiency calculated with the following formula:.
The requirements of i and ii do not apply to fans that need to be explosion proof. Axial — as a component of an air handling unit or fan coil unit. Mixed flow — as a component of an air handling unit or fan coil unit. Notes to Table J5. The pressure drop of flexible ductwork sections may be calculated as if the flexible ductwork is laid straight.
The upstream connection to ductwork bends, elbows and tees in the index run must have an equivalent diameter to the connected duct. The pressure drop across a coil must not exceed the value specified in Table J5.
A high efficiency particulate arrestance HEPA air filter must not exceed the higher of—. The pressure drop across a variable air volume box, with the damper in the fully open position, must not exceed—.
Balancing and control dampers in the index run must not exceed a pressure drop of 25 Pa when in the fully open position. The requirements of a , b , c and d do not apply to—. There are two options to demonstrate that a fan system that forms part of an air-conditioning system is compliant with J5.
The first option is to demonstrate that each of the individual components of a fan system are individually more efficient than the values specified in J5. The second option is to demonstrate that the fan system as a whole is more efficient than a system that is designed meeting the individual component requirements. The component level compliance option is intended to allow for a simpler method to demonstrate compliance, allowing for a relatively simple comparison against a Deemed-to-Satisfy efficiency value for each component of the fan system.
The system-level compliance option is intended to allow for increased flexibility when design constraints prevent the individual component level metrics from being met, without necessitating the use of a JV3 calculation or another Performance Solution. If a pump system as a whole is compliant with J5.
The clause uses a regression formula, based on the fan input power, minimum fan performance grade and two regression coefficients to disallow the use of an inefficient fan in an air-conditioning system. Table J5. For the purpose of this calculation, the pressure drop of flexible ductwork sections may be calculated as if the flexible ductwork is in a straight configuration.
Reducing bends are permissible. An acceptable Performance Solution may be to demonstrate that where a pressure loss of a component exceeds the allowance provided in J5. Note that the allowances for grilles do not include any balancing dampers that may be included within the grille. Smoke spill fans will rarely operate and therefore represent a very small amount of actual energy usage. Ductwork and fittings in an air-conditioning system must be provided with insulation—.
The requirements of a do not apply to—. For the purposes of a , b and c , fittings—. Climate zone 1, 2, 3, 4, 5, 6 or 7. Climate zone 8. Ductwork and fittings in an air-conditioning system need to be insulated to reduce energy loss. The insulating requirements do not apply to ventilation ductwork where the air is not heated or cooled. Note that the insulation levels in Table J5.
The insulation should also maintain its position and thickness other than at flanges and supports as any compression of insulation can reduce its effectiveness.
Without a vapour barrier, the likelihood of condensation forming increases. Condensing moisture can saturate the insulation, thereby reducing its effectiveness and causing it to deteriorate. If a room where the ductwork is not insulated is sub-divided then insulation will need to be added to the ductwork that passes through the first room to serve the second room.
This needs to be considered if the exemption is applied to a part of a building or storey likely to be sub-divided as part of a fit-out. There would be no benefit gained, in terms of reducing energy consumption, by requiring insulation to be installed on this ductwork. Note that air-handling ductwork must also comply with Clause 5 of Specification C1.
In this example, the building is located in climate zone 5 and the ductwork is greater than 3 m in length. Space A is not conditioned; therefore insulation must be installed to the supply and return ductwork with a minimum R-Value of R2. Space B is a conditioned space; therefore insulation with a minimum added R-Value of R1.
No insulation is needed for the return ductwork in Space B as it is exempted by J5. Space C is a conditioned space. In Space B and C the diffuser forms the interface with the conditioned space and is therefore exempt from the insulation requirements of J5.
The exhaust ductwork is exempt from the insulation requirements of J5. This means passive or static components of a ductwork system must meet the insulation requirements of this section and may include items such as plenums,bends,branches,transitions, reducers, offsets, spigots, cushion heads, attenuators and fixed air balance dampers.
Active components of a ductwork system are exempt from the insulation requirements of this section. This exemption recognises that there are practical difficulties applying insulation to components that move or where access is regularly required.
Active components may include Variable Air Volume VAV boxes, electric duct heaters, actuated volume control dampers, access panels and doors, fire and smoke dampers, fans or humidifiers. Air-conditioning ductwork has joints, and unless sealed these joints will allow heated or cooled air to escape. To limit this heat loss or gain, ductwork must be sealed with adhesives, mastics, sealants, gaskets or the like in accordance with AS Parts 1 and 2 for the static pressure in the system.
ABN 88 Queensland Government. Google Tag Manager. You are here. Home » Air-Conditioning. Search the QBCC website:. Air-Conditioning Work:. Is a licence required? Such work includes the following: Installation of ductwork and enclosures for air-conditioning, air handling and mechanical ventilation systems for a building; Installation, commissioning, servicing or repairing refrigeration, air-conditioning, mechanical ventilation and air handling systems for a building; The preparation of plans and specifications design work for the above work.
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