Feedback for VRF standard in India 2017
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Template for comments and Core committee observations
DateDocument:Draft Standard - VRFProject:VRF
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Org. name/Commentor nameLine number
Clause/ Subclause
Paragraph/ Figure/ Table/COMMENTSProposed changeObservations of the Core committee
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(e.g. 17)(e.g. 3.1)(e.g. Table 1)GeneralTechnicalEditorial
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Ashfakpage 123.2.7Sound Power LevelThe given english is confusing.
Please mention the value of dB which has to be maintained of which must not be breached on the higher side.
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Ashfakpage 155.4.1Air flow settingDucted units rated less than 8KW
8KW is generally confusing between Electrical KW or a cooling KW. plz mention EKW OR CKW or just mention in in Tons or TR
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Ashfakpage 165.4.3.1Air flow setting for ducted indoorsCubic meter per second
this must be in CFM as layman understands only the word CFM
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Ashfakpage 103procedure flow chartpicture is not readablepicture must be readable
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Kamal Bhattacharyya (kbh54kamal@gmail.com)Test procedure for Fresh Air unit operating with VRF system is to be included in this standard.
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MANJEET SINGH
5.1.1.1 to 5.1.1.3
5.1.1.1 to 5.1.1.3Compressor Speed
There is no word as of compressor Speed
It has to be mentioned in terms of hz.
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MANJEET SINGH5.25.2Connecting tube length
Connecting tube length can not be manucfatured specified for test conditions.
Minimum 7.5 mts length to specified.i.e either 95 or 90 % of rated
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MANJEET SINGH6.1.106.1.10Standard rating cooling capacityStandarda rating cooling capacity
What is the mimium % criteria for cooling capacity.i.e either 95 or 90 % of rated
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MANJEET SINGH6.2.6.2Maximum Operating testMaximum Operating test
Since it is realability test. test duration can not be one hour it has to be minimum 4 hr and suggested to have duration of 12 hours
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MANJEET SINGH6.26.2Maximum Operating testMaximum Operating test
60 minutes continious run after achieveing temp. what does it mean?? since it not the cooling test.
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MANJEET SINGH6.3.46.3.4Freeze up testFreesze up test
Condenation Evaporation perfoemance test condition are missing i.e DB 21 WB 19
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MANJEET SINGHAnnef AnnefISEERISEER
Coefficent A,B,C & D, what are basis of the calculation.Pls share.
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