Steve,
I guess you don't believe and want some evidence.
I have the Bryant Evolution Extreme (equivalent system to the Carrier
Infinity Greenspeed) and it is RF quiet. It was one of the conditions of
purchase I made with the installer. Both the air handler and compressor
are VS.
This is a 2013 vintage system so I have a few thousand hours in front of
the radio with the system on and off.
I live in a rural location so it's not masked by local noise. The beams
are within 100'.
I can stand right next to the outdoor unit with a SW radio and barely
hear anything.
I am extremely pleased with the systems lack of RFI, efficiency and home
comfort.
Variable speed systems can be engineered well for EMC.
73,
Steve
W1SRD
On 2/14/2023 11:17 AM, Steve London wrote:
Better yet, show us spectrum displays of about 100 kHz width, on the band
with the closest antenna, when the band is dead, with the fan running, and
with the fan off.
73,
Steve, N2IC
On Tue, Feb 14, 2023 at 12:05 PM James Jordan <k4qpl2@gmail.com> wrote:
I have a Carrier "Infinity" system with fully VS drives on both the
compressor and air handler fan. It's their top of the line most efficient
system. Never heard a peep of RFI from it. I'll walk closer to the units
with an AM radio to see if I'm missing something and if I hear anything
I'll post again.
73,
Jim K4QPL
On Tue, Feb 14, 2023 at 12:57 PM Dennis Monticelli <
dennis.monticelli@gmail.com> wrote:
The variable speed fan motors are bad news. Fixed speed or multiple
fixed
speed (selected by winding) are fine. However the fan motor isn't the
only
motor in the system. Look into the compressor too. There is also a
lesser
chance that the controller board generates noise you can pick up. If
accessible during installation, some ferrite sleeves on the digital
board's
wires are a good idea.
Both of my Daikin HVAC units are completely quiet but those models were
chosen with no PWM drive motors and I did put ferrites on the controller
board for extra insurance.
Dennis AE6C
---------- Forwarded message ---------
From: <rfi-request@contesting.com>
Date: Tue, Feb 14, 2023 at 9:00 AM
Subject: RFI Digest, Vol 241, Issue 20
To: <rfi@contesting.com>
Send RFI mailing list submissions to
rfi@contesting.com
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.contesting.com/mailman/listinfo/rfi
or, via email, send a message with subject or body 'help' to
rfi-request@contesting.com
You can reach the person managing the list at
rfi-owner@contesting.com
When replying, please edit your Subject line so it is more specific
than "Re: Contents of RFI digest..."
Today's Topics:
1. RFI from Carrier Heat Pump? (RVZ)
----------------------------------------------------------------------
Message: 1
Date: Tue, 14 Feb 2023 04:54:07 +0000 (UTC)
From: RVZ <rlvz@aol.com>
To: rfi@contesting.com
Subject: [RFI] RFI from Carrier Heat Pump?
Message-ID: <735693955.1361834.1676350447226@mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
Hi Guys,
?I've seen posts where some Air Conditioners and Furnace units with
variable speed motors create RFI on the Ham Bands.? I'm thinking of
purchasing a new Carrier 3.5 ton Heat Pump, Model 25SCA542, with a "fixed
speed" blower and am wondering if anyone has had RFI issues with
these??Thank You in advance for your thoughts.?73, Dick- K9OM? (
RLVZ@aol.com
)
------------------------------
Subject: Digest Footer
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
------------------------------
End of RFI Digest, Vol 241, Issue 20
************************************
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|