Anyone have a factory document (scan or pointer) which provides the
factory's specified max static pressure? With their "Infinity/Evolution"
thermostats max and current static pressure can be read simply (hold the
"Advanced" button down for about a minute and you get the service
dialog, "setup" to procure "max" and service for current).
I'd expect that the factory specified max would be on the near order of
1", the thermostat goes bonkers when it's over 1.4" and the local
distributor is claiming that the sky is the limit (which makes less than
no sense to me).
My thanks, in advance.
Anyone have a document (or a pointer) they can share , from
Carrier/Bryant with the vendors specified maximum static pressure for
their 94AFU units? With their "Evolution/Infinity" thermostats the
max and current static pressures can be read off the thermostat (I
presume they do this by analyzing the results of the ECM motors
"backpressure" but don't know for sure how they co measure this. I
presume it's good enough for checking the factories specification .
My thanks, in advance
Since the distributor has been caught in multiple untruths, I am not
yet ready to let the factory know just what's going on.
And extensive search of the carrier site doesn't actually provide the
information requested. Yes, it shows .5" (as one woud expect for the
specifications, but that isn't the same as knowing just where damage to
the ECM motors is apt to kick in.
The "infinity" thermostat documentation says 1.0" and above will get
warnings, but that it will *not* impact the operation nor the dirty
filter diagnostic (but it seems that at exceedingly high levels, theat
logic IS impacted).
expect that beyond a certain point the 20 year design point of the GE
motors would be reduced to a single year. But precisely what the GE
spec is for a given motor is a separate search. And it will prove
educational if the Carrier internal documents have a value different
than GE (and yet different again from the distributor).
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