VFD Compressor Minimum Speeds - Revision history

Timm at 21:16, 31 January 2020

2020-01-31T21:16:04Z

← Older revision		Revision as of 21:16, 31 January 2020
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	'''Subject:''' VFD_Minimum Speed Update		'''Subject:''' VFD_Minimum Speed Update



	See the below table for minimum speed setting for the ZPV variable speed compressors. These minimums are expressed as a percentage of the design RPM used for the VBalance selection. These minimum speeds have been selected to maintain a minimum velocity in the suction lines for better oil return.		See the below table for minimum speed setting for the ZPV variable speed compressors. These minimums are expressed as a percentage of the design RPM used for the VBalance selection. These minimum speeds have been selected to maintain a minimum velocity in the suction lines for better oil return.

2020-01-31T21:15:34Z

← Older revision		Revision as of 21:15, 31 January 2020
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	<p style="text-align: right;">Return to [[Engineering\|Engineering Main Menu]]</p>		<p style="text-align: right;">Return to [[Engineering\|Engineering Main Menu]]</p>
	Email from Clay Brown on 1/2/20		<u>Email from Clay Brown on 1/2/20</u>

			'''Subject:''' VFD_Minimum Speed Update



	See the below table for minimum speed setting for the ZPV variable speed compressors. These minimums are expressed as a percentage of the design RPM used for the VBalance selection. These minimum speeds have been selected to maintain a minimum velocity in the suction lines for better oil return.		See the below table for minimum speed setting for the ZPV variable speed compressors. These minimums are expressed as a percentage of the design RPM used for the VBalance selection. These minimum speeds have been selected to maintain a minimum velocity in the suction lines for better oil return.

2020-01-22T20:57:40Z

← Older revision		Revision as of 20:57, 22 January 2020
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	Email from Clay Brown on 1/2/20		Email from Clay Brown on 1/2/20

	See the below table for minimum speed setting for the ZPV variable speed compressors. These minimums are expressed as a percentage of the design RPM used for the ~~vbalance~~ selection. These minimum speeds have been selected to maintain a minimum velocity in the suction lines for better oil return.		See the below table for minimum speed setting for the ZPV variable speed compressors. These minimums are expressed as a percentage of the design RPM used for the VBalance selection. These minimum speeds have been selected to maintain a minimum velocity in the suction lines for better oil return.

	We need to make sure that we are setting the minimum speed for ALL ZPV compressors per the table below. The ZPV066 and ZPV096 have a different minimum at 3600 RPM because we are using a smaller suction line size on these models. We also need to make sure that these minimums are properly communicated to the ATC for controls by others projects.		We need to make sure that we are setting the minimum speed for ALL ZPV compressors per the table below. The ZPV066 and ZPV096 have a different minimum at 3600 RPM because we are using a smaller suction line size on these models. We also need to make sure that these minimums are properly communicated to the ATC for controls by others projects.

2020-01-22T20:48:49Z

← Older revision	Revision as of 20:48, 22 January 2020
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		[[File:VFD Minimum Controller.jpg\|left\|x1200px\|VFD Minimum Controller]]

2020-01-22T20:43:24Z

← Older revision		Revision as of 20:43, 22 January 2020
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	[[File:Copeland ZPV.jpg\|center\|x300px\|Copeland ZPV.jpg]]		[[File:Copeland ZPV.jpg\|center\|x300px\|Copeland ZPV.jpg]]







			<u>'''<span style="font-size:larger;">Controller Setup Info</span>'''</u>

			Email from Jack Murray (12/26/19)

			There has been a slight change in the Minimum Speed settings for the Copeland ZPVs (variable speed scroll compressors). This minimum cannot be set in the Emerson drives, therefore we must set it in the controls software using the chart in the email below.

			<span style="font-size:11.0pt"><span style="font-family:">Use the attached instructions document to set the minimum speed via Bacview or Equipment Touch for jobs that have already been shipped. If this is a Controls by Others job, we must include the minimum speed in the sequence.</span></span>

2020-01-20T19:58:16Z

← Older revision		Revision as of 19:58, 20 January 2020
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			<p style="text-align: right;">Return to [[Engineering\|Engineering Main Menu]]</p>

	Email from Clay Brown on 1/2/20		Email from Clay Brown on 1/2/20

2020-01-16T19:22:59Z

← Older revision		Revision as of 19:22, 16 January 2020
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⚫	[[File:Copeland ZPV.jpg\|~~left~~\|~~x200px~~\|~~RTENOTITLE~~]]



		⚫	[[File:Copeland ZPV.jpg\|center\|x300px\|Copeland ZPV.jpg]]

2020-01-16T18:50:22Z

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Revision as of 18:50, 16 January 2020

2020-01-16T18:28:13Z

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	\| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" \| <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">35%</span></span></p>		\| nowrap="nowrap" style="width: 93px; border-top: none; border-left: none; border-bottom: 1pt solid windowtext; border-right: 1pt solid windowtext;" width="64" \| <p style="padding: 0in 5.4pt; text-align: center;"><span style="height:15.0pt"><span style="color:black">35%</span></span></p>
	\|}		\|}



			[[File:Copeland ZPV.jpg\|left\|x200px\|RTENOTITLE]]

2020-01-16T14:29:27Z