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

[Howe, Timothy]

Go to: Air-side HVAC System Parameters -> Fans -> Night Cycle Control ->
Select: Cycle on any.
 
 
Timothy Howe, MS, LEED(r) 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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