#Aaon unit bac netcontrol pro

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#Aaon unit bac netcontrol professional

Carnak Zone/Locked Areas - For Professional Member Only.Going Green: Geo Thermal / Water Source.Energy Efficiency and Building Performance Discussion NEW.The ARPA Zone/Open Membership Discussion Forums.RULES for AOP - Owner Assistance and Contractors.Ask Our Pros-Owner Assistance - NO DIY advice will be given.Questions About Becoming A Professional Member? Step Inside.How many refrigeration circuits do you have in your RTUs? I find it hard to believe you only have one refrigeration circuit. Mind you I do not work on aaons equipment and my knowledge of them is because I work for a smaller competitor of them. Aaon should have programming to prevent this as it sounds like you are just sending a setpoint to aaons control board instead of having direct control of the valves. IT sounds like you are getting high pressure trips because the equipment is closing the valve feeding the condensing coil to much. I believe Aaons hot gas returns before the metering device and as such is not likely capable of completely closing the discharge valve completely. Depending on the design of the equipment you may, or may not be able to close the condensing coil valve completely when the modulating reheat valve is open 100%. One that opens to send hot gas to the reheat coil and one that restricts the flow to the condensing coil forcing more gas into the reheat. The modulating hot gas reheat system uses two valves. The modulating hot gas reheat valve has to increase the flow to compensate to maintain 70☏. When you decrease the airflow across the Dx coil the leaving air temperature decreases as well. The AAON rep can't get them to tell us what they are doing. Seems like they know how to make this work and they keep it close to the chest. Is it more likely that something else is causing the problems? This unit was stripped of the wattstopper controls. It can change by +/- 10 psi in a matter of seconds. Let me ask this, will low airflow cause the high head pressure trips? What feedback should tell me not to turn those later stages on? The suction pressure sensor is all over the place and really hard to control. I will find the high head pressure switches tripped on stage 3 & 4. If I calculate my CFM per ton below 115 CFM per ton. Sometimes the suction pressure will not go below 135 psi until I have all 4 stages on. I enable the reheat and give it a 70 deg f set point. The start up guy told me when I'm in dehum to modulate the stages to maintain 135 psi suction pressure on stage 1. My issue (I think) is when the boxes are at minimum and the unit goes into dehumidification. Units have minimum outside air and are providing air to cooling only vav boxes. Units are 4 stages of DX: 2 variable scroll and 2 are regular.

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