VFD Compressors with Electronic Expansion Valves - Revision history

Timm at 13:25, 3 December 2021

2021-12-03T13:25:32Z

← Older revision		Revision as of 13:25, 3 December 2021
Line 11:		Line 11:

	The EEV selections do NOT have any over capacity built in to the Sporlan program like the TXV’s, so it is recommend that EEVs be selected for 90% maximum rating. It is important to keep in mind that you do not have to be as concerned with the valve being “oversized” for EEVs as the valve’s control is consistent through the range of operation.		The EEV selections do NOT have any over capacity built in to the Sporlan program like the TXV’s, so it is recommend that EEVs be selected for 90% maximum rating. It is important to keep in mind that you do not have to be as concerned with the valve being “oversized” for EEVs as the valve’s control is consistent through the range of operation.

			[https://sporlanonline.com/literature/100/ev/100-20%20Electric%20Expansion%20Valves.pdf https://sporlanonline.com/literature/100/ev/100-20%20Electric%20Expansion%20Valves.pdf]

Timm at 13:22, 3 December 2021

2021-12-03T13:22:17Z

← Older revision		Revision as of 13:22, 3 December 2021
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	Effective immediately, all circuits with a Copeland ZPV variable speed compressor will have an electronic expansion valve for improved superheat control. Sales has been notified to include this on all factory orders, but if they have missed it, please make sure to have them add it to the factory order. Only the ZPV circuit will get an EEV, unless specified otherwise in the factory order.		Effective immediately, all circuits with a Copeland ZPV variable speed compressor will have an electronic expansion valve for improved superheat control. Sales has been notified to include this on all factory orders, but if they have missed it, please make sure to have them add it to the factory order. Only the ZPV circuit will get an EEV, unless specified otherwise in the factory order.

			<u>EEV Selection:</u>


			The EEV selections do NOT have any over capacity built in to the Sporlan program like the TXV’s, so it is recommend that EEVs be selected for 90% maximum rating. It is important to keep in mind that you do not have to be as concerned with the valve being “oversized” for EEVs as the valve’s control is consistent through the range of operation.

Timm at 21:11, 31 January 2020

2020-01-31T21:11:23Z

← Older revision		Revision as of 21:11, 31 January 2020
Line 7:		Line 7:

	Effective immediately, all circuits with a Copeland ZPV variable speed compressor will have an electronic expansion valve for improved superheat control. Sales has been notified to include this on all factory orders, but if they have missed it, please make sure to have them add it to the factory order. Only the ZPV circuit will get an EEV, unless specified otherwise in the factory order.		Effective immediately, all circuits with a Copeland ZPV variable speed compressor will have an electronic expansion valve for improved superheat control. Sales has been notified to include this on all factory orders, but if they have missed it, please make sure to have them add it to the factory order. Only the ZPV circuit will get an EEV, unless specified otherwise in the factory order.

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2020-01-31T21:10:51Z

Created page with "Return to Engineering Main Menu Email from Clay Brown to Engineering on 1/22/20 '''Subject:''' Electronic Expa..."

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Email from Clay Brown to Engineering on 1/22/20 

'''Subject:''' Electronic Expansion Valves for Copeland ZPV compressors

 

Effective immediately, all circuits with a Copeland ZPV variable speed compressor will have an electronic expansion valve for improved superheat control. Sales has been notified to include this on all factory orders, but if they have missed it, please make sure to have them add it to the factory order. Only the ZPV circuit will get an EEV, unless specified otherwise in the factory order.

 

Email from Clay Brown to Sales Departments on 1/8/20

'''Subject:''' Electronic Expansion Valves for Copeland ZPV compressors

 

The first group of teardown reports on the Copeland ZPV compressors show lack of lubrication as the suspected cause of failure, but the several most recent teardowns indicate dilution/washout/slugging as the mode of failure. The end result of both of these failure modes is similar, but the latter shows evidence of liquid back to the compressor. Liquid back to the compressor indicates a loss of superheat control.

To provide better superheat control across the wide operating range of the ZPV compressors, all refrigerant circuits with a ZPV compressor will be provided with an electronic expansion valve going forward. These valves more expensive than a thermostatic expansion valve, but the data suggests that the EEV is more appropriate choice to prevent liquid refrigerant back to the compressor. Unless required by the project specifications, standard single stage, digital or tandem compressors will have a standard thermostatic expansion valve.

Please make sure that this is included in all future quotes and factory orders for units with ZPV variable speed compressors.

VFD Compressors with Electronic Expansion Valves - Revision history

Timm at 13:25, 3 December 2021

Timm at 13:22, 3 December 2021

Timm at 21:11, 31 January 2020

Timm: Created page with "Return to Engineering Main Menu Email from Clay Brown to Engineering on 1/22/20 '''Subject:''' Electronic Expa..."

Timm: Created page with "
Return to Engineering Main Menu
Email from Clay Brown to Engineering on 1/22/20 '''Subject:''' Electronic Expa..."