I am having my air heat pump replaced. The old unit is R22 and the new unit
is 410A (Bryant).
The guys doing the work were in the middle of the "triple evacuation" when
they had to leave. They drew a vacuum once, then pushe some coolant through
with nitrogen. They had to leave before the final evacuation.
They said they can come back and finish it in a week.
Does this delay hurt the process? Should I ask them to start over from the
top? I don't want to make more work for them for no reason, but I don't
want to damage the new compressor due to improper flushing.
Any advice would be GREATLY appreciated.
Thanks in advance.
remove the QWERTY to reply
The only question I have is...what was so important that they couldn't have
finished the job, or at least come back the next day and get it done.
Leaving the system the way they did shouldn't effect it as long as it was
Thanks for the reply. Yes, they capped it off carefully before they left.
They weem like conscientious workmen.
They had to leave because the snow was piling up faster than forecast and
they had about a 45 minute drive home in the truck. Since my system is dual
fuel and the oil part is working fine I told them I didn't mind.
As for the dealay, I guess they are just booked up.
Sounds like they used some Calgon RX-11 to flush your old lines since
they didnt replace them?
The triple evacuation is unneeded anymore as the new vacuum pumps are
two stage. The most important thing is to make sure they use a micron
gauge to measure the degree of evacuation. It should get to 500
microns or less and hold to be considered "Good". It sounds like they
dont have one?
Sounds kinda nice that they pissed on your job to go away for a week
to another "more important" job.
Did you pick the cheapest quote?
Yes, they were flushing and re-using old lines (the line run across the
house over a finsihed basement so replacing the line would be more
expensive than usual.)
They were using a vacuum pump and gauge of some sort. I am not wure what
type, I was only sort of keeping track of what they were doing.
They had to leave because the snow was piling up. The snow storm started
in ernest sooner than forecast.
They got the outside compressor unit and the indoor coil installed and
closed up before they left. Since my system is dual fuel my oil heat is
working fine and it's not really a hardship for me. (Too cold for a air
heat pump in CT right now) They could have come back this Saturday, but I
had other plans already made.
Saturdays are their make-up days so if they do mess up the customer
doesn't need another day off work. Works for me.
When first reading your post, I was thinking of some the installers I
have seen with the "I'll get it done when I get around to it,"
mentality. But the reality is, snow or any form of precip is cause
for cutting the job short. Any type of moisture in the system is bad
and I am glad they made the choice to close the system before exposing
it. The worst scenerios I run across in service is those systems that
aren't started up properly.
Just so you know, because they are still doing an evacuation and leak
check... When they come back, do be present. Ask them to explain
their gauges and what they are looking at. Good techs will not only
welcome the company (afterall, it can become extremely routine) but
they will be glad that you, the long term owner of this equipment, is
interested in knowing not only how it works but how to keep it working
at its best.
Good to know. I was avoiding asking too many questions (for fear of looking
like I was trying to tell them how to do their job or something.) But if
you think they will be ok with me asking question I will do it. I am VERY
curious what they are doing. I am technical, an engineer, I just don;t know
jack about HVAC, so I love to learn new stuff.
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