Last year I replaced a pair of 25 year old Trane heat pumps with new
Trane high efficiency units. I specified single speed blowers for the
air handlers, because being able to hear well on HF is more important to
me than a few percent of efficiency loss. I just didn't want to take any
chances. As far as I can tell after a year of contesting in cold and
warm seasons, I have experienced zero RFI from the new systems. I have
zero regrets going with the single speed air handlers. My heating and
cooling bills are dramatically lower anyway, as the old units were not
nearly as efficient. As Mike said, YMMV.
--Kirk, K4RO
On 12/1/2015 11:41 PM, Mike Ryan wrote:
The variable speed fan motors or those units with them APPEAR to have
issues. Not just at start up, but when they are running at any speed.
Mine was that way and a friend close by had the same crud from one. ( I
think his was a LEXAIR or something like that.) At any rate, nothing
could be done about it here but to replace the motor with a single speed
unit. All's quiet now... Your results may vary. - Mike
-----Original Message----- From: Gary K9GS
Sent: Tuesday, December 01, 2015 11:48 PM
To: rfi@contesting.com
Subject: Re: [RFI] Fwd: Re: RF quiet HVAC
It would be a great service if the ARRL would publish a database on
their website, with model numbers, of devices to stay away from.
On 12/1/2015 10:23 PM, Joe Orsak wrote:
I've had such terrible experiences with Carrier residential units I
just have to put it out there: as far as I'm concerned Carrier is
absolute junk. 4 different "high end" units in 4 different homes -
nothing but problems. The "high end" dual fuel system in my personal
residence was a much better RFI generator than it was a heat pump.
Just sayin. Glad to hear other folks have had better experiences than me.
73,
Joe W4WN
-------- Original message --------
From: dalej <dj2001x@comcast.net>
Date:12/01/2015 7:25 PM (GMT-05:00)
To: Mel Crichton <kj9c@iquest.net>
Cc: rfi@contesting.com
Subject: Re: [RFI] RF quiet HVAC
Same here with the Carrier top of the line high if gas furnace,
58MVP060, August 2000 and not a RF peep from it.
Dale, K9VUJ
On 01, Dec 2015, at 17:58, Mel Crichton <kj9c@iquest.net> wrote:
We installed a 96% efficient Carrier gas furnace a few years back, not
a bit of RFI. Bryant is a subsidiary of Carrier so i would expect
similar results with Bryant
I have no first hand experience with Trane but have seen complaints on
this reflector.... as an HVAC engineer I have used both in large
industrial applications, but residential is a different story...
A cheap hand held short wave receiver would be good for testing RFI at
the big box appliance stores.... be sure they put the unit in actual
operating mode, as the "showroom" mode does not use motors, just
lights....
I wish I had taken the time to pre-test that @#$%^& Samsung
refrigerator instead of telling the XYL to buy what she wants....
Mel KJ9C
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--
73,
Gary K9GS
Greater Milwaukee DX Association: http://www.gmdxa.org
Society of Midwest Contesters: http://www.w9smc.com
CW Ops #1032 http://www.cwops.org
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