Vacuum required to activate this APS

[Mike2016]

Would anyone know how much vacuum pressure is needed to activate the Navien APS part# 30015811A. Its not labeled on the sensor as most that I have seen.

 

[GReynolds929]

They don't give a vacuum value, just expected voltages.

 

[Mike2016]

Thank you for this info, would you know what kind of vacuum output inducer 30014217A should be putting out at different RPMs.

 

[GReynolds929]

No, just voltages.

 

[Mike2016]

Just making sure were on the same page, Im talking about the vacuum and vacuum line going from inducer assembly to the pressure sensor/switch. there is vacuum that/s applied onto the APS from the inducer motor. How can we know the right vacuum is being produced by the inducer motor.

 

[breplum]

Just making sure were on the same page, Im talking about the vacuum and vacuum line going from inducer assembly to the pressure sensor/switch. there is vacuum that/s applied onto the APS from the inducer motor. How can we know the right vacuum is being produced by the inducer motor

Normally in all induced draft systems, with system off, we just suck on the switch and check to see if it actuates. We've heard of tubing deteriorating on furnaces but in over 20 years never seen a bad pressure switch on Navien and 50 years in HVAC not had but one bad pressure switch.
you can certainly use mouth to activate the switch during firing, or jump the switch at the right moment.

 

[Mike2016]

Normally in all induced draft systems, with system off, we just suck on the switch and check to see if it actuates. We've heard of tubing deteriorating on furnaces but in over 20 years never seen a bad pressure switch on Navien and 50 years in HVAC not had but one bad pressure switch.
you can certainly use mouth to activate the switch during firing, or jump the switch at the right moment.

Yes I have done that and switch is fine but I was trying to obtain at what vacuum pressure the switch activates at and on any switch this number is on the side in water columns but not the Navien.

However second part of the question is not switch related but I'm trying to find out how much vacuum does the inducer produces and is it dynamic or static, does this vacuum change with RPMS or is the vacuum steady at 300 or 3000 RPM'S

 

[GReynolds929]

Why are you so interested in finding this out. Is there a problem with your unit?

 

[Mike2016]

The vacuum feels weak but would like to confirm with a manometer. But looks like thats not gonna be easy to obtain. Thats why if the switch was labeled like other manufacturers than we can at least confirm that were getting that from the inducer.