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Patterns of Operation
Patterns of Operation
Which Room has a CO2 Problem?
Which Room has a CO2 Problem?
Ans: Several but Classroom 116 sets the peak at 1,100 ppm.
Which Room is Freezing Students Out Mid-Morning?
Which Room is Freezing Students Out Mid-Morning?
Ans: 103. Does it move enough air? Or did the room changeover to cooling - for no reason?
Check if 103's Operating Temps Show that It went from Heating to Cooling and back to Heating in Two Cycles.
Check if 103's Operating Temps Show that It went from Heating to Cooling and back to Heating in Two Cycles.
Why? Return Air Temp was Not Higher Than Previous Period. Change Controller Parameters to Avoid Unnecessary Cycles Like This?
Which Units Have Been Using 2nd Stage Electric Heat?
Which Units Have Been Using 2nd Stage Electric Heat?
Ans: Unit 112. And why do units 97 and 99, which are in the basement?
Which Unit is Consuming the Most 1st Stage Electric Heat?
Which Unit is Consuming the Most 1st Stage Electric Heat?
Ans: 112. Check to see if the compressor is running.
Which Compressor is Running the Least? Which the Most?
Which Compressor is Running the Least? Which the Most?
Unit 112 doesn't run at all - major problem. Unit 98 is in the basement - heat loss is minimal. Why is it running at all?
Which Units Have an Electric Heat Problem in kWh
Which Units Have an Electric Heat Problem in kWh
Ans: 112. Compressor doesn't work so heating depends on electric resistance coils.
What is the kWh Consumption of Classroom 112 Heat Pump? First Stage Electric Heat? Second Stage?
What is the kWh Consumption of Classroom 112 Heat Pump? First Stage Electric Heat? Second Stage?
Question: On What Days did the Compressor Recover for Short Periods of Time? Why?
How Many Units, During Unoccupied Hours, Have an Outside Air Damper Fail-to-Close Problem?
How Many Units, During Unoccupied Hours, Have an Outside Air Damper Fail-to-Close Problem?
Ans: Check return (mixed) air sensor - units 103, 114, and 115.
Which Unit has an Excessively Cold Return Air Problem During Occupied Hours?
Which Unit has an Excessively Cold Return Air Problem During Occupied Hours?
Ans: Unit 103 drops to a low of 62F multiple times even when outside air temp is ~36F.
Which Two Units Have the Greatest Compressor Runtime?
Which Two Units Have the Greatest Compressor Runtime?
Answer: Units 105 and 106.
Maybe It's Because These Are First Floor Corner Rooms?
Maybe It's Because These Are First Floor Corner Rooms?
Both have double outside walls compared to other classrooms.
Why Are Basement Units 97 and 98 Consuming More Energy Than Any of the First Floor Units?
Why Are Basement Units 97 and 98 Consuming More Energy Than Any of the First Floor Units?
Can't be heat loss. Must be excessive outside air intake.
Further, Why Are The Two Basement Units Consuming 1st and 2nd Stage Electric Heat Over All But One First Floor Unit?
Further, Why Are The Two Basement Units Consuming 1st and 2nd Stage Electric Heat Over All But One First Floor Unit?
Ans: Big unnecessary outside air CFM?
Which Two Units Have Excessively Cold Leaving Water Temperature to the Main Loop?
Which Two Units Have Excessively Cold Leaving Water Temperature to the Main Loop?
Answer: 97 and 112. But they are way too low. Must be another problem.
Which Two Units Have an Unreasonably High Leaving Water Temperature?
Which Two Units Have an Unreasonably High Leaving Water Temperature?
Answer: 97 and 99 - Low water flow? Air in the line? Pump cavitation? Better check it out.
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