On Tue, 11 Jun 2019 22:44:06 GMT, James
m wrote:

replying to clare, James wrote:
Add 1 more to the count of people experiencing this issue with new furnace &
new condensate pump plugged into a newly installed GFCI.

Symptoms of the issue were that the new touchscreen thermostat just turned
off, later on the same day that it was installed! This was *after* inspection
from an electrician that the plumbers & HVAC people called in.

The next day, the guy that came back out found that the issue was the newly
installed GFCI powering the condensate pump had tripped. We didn't even think
of this, because that outlet didn't exist before! (thus no GFCI) There was an
alternate safety sensor on the evaporator coil condensate drain pan, which we
searched online about and originally assumed was the issue. The HVAC guy that
came out was from the same company that installed it, yet he didn't have any
knowledge of why this */or any/* GFCI would trip.

So /assuming both/ the HVAC installers & electrician knew what they were doing
this should have never happened. Yet it still happened.

Even with all the code books, rules, regulations, training and supposedly
proper equipment installed this still happened in 2019. Go figure.

Yet another symptom of the same old knowledge vs. complexity problem with
human beings that must participate in the current society. Such narrow
focused job specialization plus complex systems with complex code books and
myriad permutations of parts and it's no wonder simple avoidable problems like
this still happen all the time.
Up here in Ontario you can only cord and plug if it comes from the
factory with a cord and plug - and I don't think any HVAC system that
is CSA approved comes that way. Furnace MUST be on separate circuit
-as must the AC - and no GFCI device is required (or recommended) on
the HVAC equipment. The only device "allowed" on the furnace circuit
is a condensate pump - but most of THEM are cord and plug - which
would eliminate them being on the same circuit - - - - (unless you
put a "single" outlet INSIDE the furnace and plugged the pump in
there) I don't think there is any law against cutting off the plug and
hardwiring the pump either - but not 100% sure on that (or even the
rest - as far as that goes -- - - - -