Joe Pattenaude
Articles
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Application Note: Controlling an AAON VCCX2 with 75F via BACNet Integration
Use Case:AAON units are often selected with the AAON VCCX2 controller. The VCCX2 does allow hardwiring of Occupancy Enable and Discharge Air Temperature Setpoint, but in applications where there a...
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FAQ: Does 75F Require Internet to Function?
No. A 75F system will act standalone without a connection to the internet. However, you will lose the following:Remote support from 75FOver-the-Air updatesAbility to use Facilisight for remote di...
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Troubleshooting a HyperStat That's Power Cycling
3 Minute ReadTraditional thermostats act as a relay board, only passing power through a relay to the proper relays. The displays and relays are normally powered with one or two small DC batteries....
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FAQ: 75F Product Power Ratings/Requirements
When laying out power supplies for 75F devices, it's important to ensure transformers are sized for the demand. The following are the recommended design power for each device: CCU: 24V AC/DC (+/-...
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Application Note: Restricting Times for Custom Alerts
Problem: In a traditional BAS setup, alerts can be generated 24/7. But what if you only want alerts to generate during unoccupied times when there is nobody in the building? An example: A restaura...
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Application Note: One AHU Serving Multiple Floors of VAVs
Current Standard Solution: 75F offers a VAV sequence in which the zones and the systems work together to achieve a perfect balance of comfort and energy. This works by all zones will reporting d...
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FAQ: Recommended 24v and Control Signal Cable
24VAC Power Wire: 18 AWG, 2 conductor Non-Shielded Plenum Rated, Solid Copper Conductors Red/White conductors Red (24V), White (C) DC Power: 18 AWG, 2 conductor Non-Shielded Plenum, Solid Copper...
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Application Note: Controlling a FPVAV with Multiple Stages of Reheat
Problem: It's common to see VAVs with fans and/or multiple stages of heating. The SmartNode only has two relay outputs. So using 75F, how would we control the equipment in the scenario that there...
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Application Note: Air Cooled Chiller Plant with 2 Chillers
Solution: Using a 75F Edge 10, an Air Cooled Plant can be controlled in the form of a simple configurable controller. The Edge 10 will come pre-programmed for a true plug-and-play experience and w...
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FAQ: Do I need 2 airflow sensors for every VAV with SmartNodes?
Yes! For heating, ASHRAE Guideline 36 specifies the following sequence: - When the Heating PI Loop is between 0% and 50%, reset the VAV discharge air temperature setpoint from minimum to maximum. -...