[TRNSYS-users] Type8a: Setback temperature issue

[PAUL COALES]

Kent,

That is good solution. Seems to work too!

Thanks 
Paul

--- On Mon, 7/12/09, Kent Beason <kbeason at schlitterbahn.com> wrote:

> From: Kent Beason <kbeason at schlitterbahn.com>
> Subject: RE: [TRNSYS-users] Type8a: Setback temperature issue
> To: "PAUL COALES" <coalespr at btinternet.com>, trnsys-users at cae.wisc.edu
> Date: Monday, 7 December, 2009, 21:42
> Paul,
> 
> A brief summary of Type671 is found here:
> 
> http://www.transsolar.com/__software/download/en/tesslibary_shortinfo_en.pdf
> 
> A further note on my use of Type671: I used it in
> conjunction with both the TESS Type14 Nightsetback and an
> equation that I defined in order to change the Type671's
> setpoint (Input #2) with respect to daily time (and
> seasons).  
> 
> TESS Type514 also can be used in lieu of the equation I've
> described above for a changing daily setpoint.
> 
> The documentation of the user-purchased TESS libraries is
> installed in the TRNSYS program files directory:
> 
> Tess Models\Documentation\Controller Library
> 
> However, I suspect now that you don't have TESS libraries,
> so after looking around a bit in the component tree for
> non-TESS components, Type14e under Utility/Forcing
> Functions/Temperature is an option for you to use in
> conjunction with Type108 under Controllers\5-stage Room
> Thermostat.  Connect output 2 of Type14e into the "1st
> stage heating setpoint" (input 2) of Type108.
> 
> Kent Beason
> Schlitterbahn Development Group
> 830-609-8904 m
>  
> 
> -----Original Message-----
> From: PAUL COALES [mailto:coalespr at btinternet.com]
> 
> Sent: Monday, December 07, 2009 2:48 PM
> To: trnsys-users at cae.wisc.edu;
> Kent Beason
> Subject: RE: [TRNSYS-users] Type8a: Setback temperature
> issue
> 
> Thanks Kent,
> 
> I do appear to be seeing the same behaviour.  Is there
> a prefered method for reporting such issues?
> 
> I was looking for details of Type 671 but dont seem to be
> able to find any on the TESS /TRNSYS site.  Do you have
> a reference?
> 
> Paul
> 
> --- On Mon, 7/12/09, Kent Beason <kbeason at schlitterbahn.com>
> wrote:
> 
> > From: Kent Beason <kbeason at schlitterbahn.com>
> > Subject: RE: [TRNSYS-users] Type8a: Setback
> temperature issue
> > To: "PAUL COALES" <coalespr at btinternet.com>,
> trnsys-users at cae.wisc.edu
> > Date: Monday, 7 December, 2009, 18:56
> > Paul, 
> > 
> > I recently had the same problem with Type8a. 
> Related
> > to your #2 conditions below, set your "Heating set
> back
> > temperature difference" to zero and see if the heating
> stage
> > operates then.  My experience with 8a says it will
> > work, but of course with a useless setback function. 
> I
> > ended up throwing out Type 8a in my simulation and
> easily
> > using Type 671 from the TESS library.
> > 
> > Kent Beason
> > Schlitterbahn Development Group
> > 830-609-8904 m
> >  
> > -----Original Message-----
> > From: PAUL COALES [mailto:coalespr at btinternet.com]
> > 
> > Sent: Monday, December 07, 2009 7:29 AM
> > To: trnsys-users at cae.wisc.edu
> > Subject: [TRNSYS-users] Type8a: Setback temperature
> issue
> > 
> > Hi 
> > 
> > Are there any issues with Type8a, setback function? 
> The
> > instructions for use seem straight forward but it does
> not
> > seem to work for me:
> > 
> > 1) If INPUT "Set back control function" is fixed at
> 0,
> > setback behaviour is disabled.  "Control signal for
> 1st
> > stage heating" is set when  "Room temperature" drops
> below
> > "1st stage heating temperature".  This behaviour
> seems
> > correct.
> > 
> > 2)If INPUT "Set back control function" is fixed at 1,
> > setback behaviour should be enabled.  However, the
> "Control
> > signal for 1st stage heating " is never set.  My
> heating
> > system never turns on and my room temperature
> continues to
> > fall.
> > 
> > I've set "minimum primary source temperature" to a
> low
> > value (10 degrees)  "1st stage heating in 2nd stage"
> is set
> > to 1.  "Heating set back temperature difference" is
> set to
> > 1 deltaC
> > 
> > 
> > Have I missed something?
> > 
> > Paul
> > 
> > 
> > 
> > 
> > 
> > 
>