[Equest-users] Hours outside of throttling range -VAV system

[James Geers]

Using "Cycle on Any" does the trick.  Thank you.  Will this affect my DCV?

 

James F. Geers

Registered Architect

LEED Accredited Professional

 

SFA Architects

300 West Fourth Street

Cincinnati, Ohio 45202

513.721.0600    

513.721.0611 (fax)

 

  _____  

From: Howe, Timothy [mailto:Timothy.Howe at stantec.com] 
Sent: Tuesday, January 20, 2009 3:28 PM
To: James Geers; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Hours outside of throttling range -VAV system

 

Go to: Air-side HVAC System Parameters -> Fans -> Night Cycle Control ->
Select: Cycle on any.

 

 

Timothy Howe, MS, LEEDR AP
Mechanical Engineer

  _____  

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of James Geers
Sent: Tuesday, January 20, 2009 3:13 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Hours outside of throttling range -VAV system

I likewise have been having enormous trouble reducing the hours outside of
the throttling range for my design case building.   In the winter months in
the morning I will have multiple hours outside of the throttling range for
multiple zones and this exceeds 300  hours.

 

Things I have varied but did not solve the problem include:

 

1.	Occupancy schedule 
2.	Heating Design Day Schedule 
3.	Night Setback Temperature 
4.	Boiler Size 
5.	Loop Capacity 
6.	Pump Size 
7.	Delta T for heating and Pre-heating coils 
8.	Minimum Outside Air 
9.	Throttling Range 
10.	Design temperature 

 

 

At this point I am randomly changing settings to reduce the amount of hours
outside of throttle range, but I would like to have a more deductive
process.

 

I have a suspicion that there was a setting in the wizard that is overriding
my inputs, but that is conjecture.

 

My engineer designed the system in Trane Trace and oversized it by 25% so
the designed heating equipment should be adequate.

 

Thank you,

 

James F. Geers

Registered Architect

LEED Accredited Professional

 

SFA Architects

300 West Fourth Street

Cincinnati, Ohio 45202

513.721.0600    

513.721.0611 (fax)

 

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