2System Installation
Compression type fittings should be used in preference to flared fittings. Where flared tube connections are to be used (for example, when connecting factory prepared pre charged lines), they should be made carefully on a square cut, soft copper tube without any burrs and for the appropriate flare angle. The connection should be tightened with two wrenches,[url=http://www.burberryoutletonline.in.net/]burberry@#$%&[/url], and Teflon tape or pipe dope should not be used. Test for leaks.
2,[url=http://www.hermesbirkin-bags.us@#$%&/]hermes greek god[/url].1,[url=http://www.niketnrequin-pascher.fr/]tn requin[/url].4 Connections. The correct type and grade of gasket material that is compatible with the refrigerant and oil should be used. The presence of air and moisture particularly in replacement refrigerants and oils can cause acid generation and oil breakdown leading to premature equipment failure and refrigerant leakage.
2.1,[url=http://www.nikefreerun.fr/]@#$%& free 5.0[/url].7 of Copper Tubing. The correct grade of copper tubing should be used for the pressure and bending requirements of the installation. This will help prevent future leaks. Copper should not be used in ammonia and in sulphur dioxide (SO2) systems.
2.1.8 Gland Caps. Valve stem gland caps that cover gauge points and service valve caps should always be replaced and thoroughly leak tested after service,[url=http://www.oakleysunglasses-outletcheap@#$%&/]oakley store[/url]. Gland packing nuts on valves should not be tightened unless they are leaking.
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Sources of Emissions. Installation and servicing are the single largest sources of refrigerant emissions. It may be useful to include members of the designated operation and maintenance personnel in the commissioning team for familiarizing them with the system. The duties of the General Contractor, Mechanical Contractor, Electrical Contractor and various sub contractors should be specified in the contract specifications. Commissioning is not intended to replace the contractor's normal and accepted procedures for installing and pre testing the equipment and carrying out the standard check out and start up responsibilities.
2.2.2 In preparation for commissioning, the commissioning team should:
Be fully familiar with the manufacturer's installation instructions, the system operating and maintenance manual, and the purchase and installation specifications;Confirm that all applicable regulations, Standards and this Code have been adhered to;Ensure that the facility or designated function will have a cooling load available of approximately 60 of the design load;Ensure that all electrical and control systems are complete and certified;Inspect and verify the quality of all piping systems (including connections,[url=http://www.cheapnfljersey-outlet@#$%&/]wholesale jerseys[/url], support, insulation and bend radii), ductwork, electrical systems and installation;Check all specification requirements, including: vibration insulators, water piping, mechanical room safety features,[url=http://www.raybansunglassese.co.uk/]raybans[/url], ventilation and labelling; andVerify that the system has been filled with refrigerant in accordance with the manufacturer's instructions.2.2.3 Startup and Shut down. This portion of the commissioning will verify all components and controls through functional performance testing.
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2.4 and Maintenance2.4.1 Inspections. A frequent walk around is a simple, cost effective manner to reduce and avoid AC failures and emissions and to look for energy inefficiencies. The following checks on the installed AC systems are recommended, as applicable to each particular system:
Check the sight glasses for the proper and consistent levels of fluids over time. (Worn or damaged belts,[url=http://www.supra--shoes@#$%&/]supra footwear[/url], misalignment or over tensioning can cause compressor shaft seal and front end bearing failure, resulting in leaks.)Ensure that the evaporator coil is not iced up and that the condensate pan drain is functioning well. A good system of receiving and logging complaints and maintenance calls is important to monitor the performance of the AC instrumentation and control systems. The log should be reviewed periodically and in relation to the past work orders to detect trends and to take appropriate action. If the system has a standing contract for preventive maintenance and servicing,[url=http://www.@#$%&--shoes@#$%&/]high top @#$%&[/url], then this evaluation should be brought to the attention of the contractor.
2.4.4 Replacement filter dryer cores are available for larger installed systems and should be replaced when it is deemed that the filter and/or desiccant are no longer viable. Clogged filters will cause the system to run inefficiently.
2.4.5 Protection,[url=http://www.bottes-uggpascher.fr/]ugg soldes[/url]. Reduced or suspended water flow in evaporators can lead to serious corrosion problems. Flushing and a regular inspection should be carried out.
2.4.6 Air,[url=http://www.borse-gucci.it/]borse gucci[/url]. Trapped gases in the tube sheets should be purged periodically.
2.4,[url=http://www.montblancpens.us/]mont blanc pen[/url].7 Belts. V belts should be checked to confirm that they are not too tight. Overly tight belts can cause undue strain on bearings and seals causing premature failure and leaks.

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