[Equest-users] Variable Speed Compressor "trick"

[Kelsey VanTassel]

Mine is an air-source heat pump. I tried changing the heat source to furnace and sure enough, the compressor type grayed out.

Kelsey Van Tassel
Mechanical Engineer | kvantassel at sustaineng.com<mailto:kvantassel at sustaineng.com>
608.836.4488 ext. 20 | Fax: 608.836.4477

Sustainable Engineering Group
901 Deming Way, Suite 201
Madison, WI 53717
www.sustaineng.com<http://www.sustaineng.com/>


From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Kelsey VanTassel
Sent: Wednesday, March 02, 2011 4:36 PM
To: Fleming, Joe; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Variable Speed Compressor "trick"

Yes.

[cid:image001.jpg at 01CBD8F8.8DFDCA60]

Kelsey Van Tassel
Mechanical Engineer | kvantassel at sustaineng.com<mailto:kvantassel at sustaineng.com>
608.836.4488 ext. 20 | Fax: 608.836.4477

Sustainable Engineering Group
901 Deming Way, Suite 201
Madison, WI 53717
www.sustaineng.com<http://www.sustaineng.com/>


From: Fleming, Joe [mailto:joe.fleming at tlc-eng.com]
Sent: Wednesday, March 02, 2011 4:34 PM
To: Kelsey VanTassel; equest-users at lists.onebuilding.org
Subject: RE: Variable Speed Compressor "trick"

Is this drop down available for you on the PSZ system?

[cid:image002.png at 01CBD8F8.8DFDCA60]

Joe Fleming
E.I., LEED AP BD+C, BEMP
Mechanical Engineer II

TLC Engineering for Architecture
Your 2030 Challenge Partner

800 Fairway Drive, Suite 250
Deerfield Beach, FL 33441-1816

phone:

954-418-9096

fax:

954-418-9296

direct:

954-418-4591

website:

www.tlc-engineers.com<http://www.tlc-engineers.com/>


[cid:image003.gif at 01CBD8F8.8DFDCA60]<http://www.tlc-engineers.com/>

From: Kelsey VanTassel [mailto:KVanTassel at sustaineng.com]
Sent: Wednesday, March 02, 2011 5:21 PM
To: Fleming, Joe; equest-users at lists.onebuilding.org
Subject: RE: Variable Speed Compressor "trick"

It shouldn't be grayed out. The help file says that the variable speed compressor keyword can be applied to RESVVT, PSZ, PVAVS and PVVT systems. If for some reason, your version of eQUEST is ignoring that keyword for PSZ systems, then I don't think the "trick" is going to work. I'm sorry I can't offer more help.

Kelsey Van Tassel
Mechanical Engineer | kvantassel at sustaineng.com<mailto:kvantassel at sustaineng.com>
608.836.4488 ext. 20 | Fax: 608.836.4477

Sustainable Engineering Group
901 Deming Way, Suite 201
Madison, WI 53717
www.sustaineng.com<http://www.sustaineng.com/>


From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Fleming, Joe
Sent: Wednesday, March 02, 2011 4:15 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Variable Speed Compressor "trick"

I don't know what is causing this, and hopefully someone can shed some light, but when trying to select a "Variable Speed" compressor the option is grayed out for a PSZ?
But, when you follow the subsequent steps you can trick eQuest into making the variable speed compressor option become available.

Change the system to a water source heat pump, assign it to a CW loop, then change it to a PVVT system.  The option to change your compressor to Variable Speed is now available, now change it to a PSZ system and you are good to go!

2 questions;
Does anyone see a problem with simulating Variable/Inverter or digital scroll compressors this way?  (if so, what is the proper way)
And, is there a quicker way to do this w/o having to change the system type 4 times?

Thanks

Joe Fleming
E.I., LEED AP BD+C, BEMP
Mechanical Engineer II

TLC Engineering for Architecture
Your 2030 Challenge Partner

800 Fairway Drive, Suite 250
Deerfield Beach, FL 33441-1816

phone:

954-418-9096

fax:

954-418-9296

direct:

954-418-4591

website:

www.tlc-engineers.com<http://www.tlc-engineers.com/>


[cid:image003.gif at 01CBD8F8.8DFDCA60]<http://www.tlc-engineers.com/>

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