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

[James Geers]

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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