The current blower has multiple speeds available but heating and cooling
speeds are semi-permanently wired in. They can be changed but with some
difficulty. The new unit supposedly has a variable speed fan but I
don't know how it operates.
Chuck Norcutt
On 12/6/2012 9:58 PM, Jim Nichols wrote:
> With my old units, I had multiple gas orifice plates, so could change the
> heat output, if necessary. I never had to do this. I asked the service
> man, when he did my Fall checkup, if there was any adjustment available, and
> he just shook his head. I think he had seen this problem before.
>
> I did go through the circuit diagram and find that I could adjust the blower
> speed, which I did during the air conditioning season, but found no way to
> alter the heat.
>
> Good luck!
>
> Jim Nichols
> Tullahoma, TN USA
> ----- Original Message -----
> From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
> To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
> Sent: Thursday, December 06, 2012 7:49 PM
> Subject: Re: [OM] OT: Air-source Heat Pump?
>
>
>> I hadn't thought about that but I have exactly that problem today. This
>> new Lennox is a dual stage which has the burner running at a lower
>> temperature for the first 15 minutes of so that it's on. I'm not sure
>> how this will work out. It's not that the air temperature now is too
>> low (our bedroom at equal distance is fine), the air just doesn't get
>> pushed hard enough into that back bedroom where she has her computer.
>> One advantage of the new unit is that it has a variable speed fan and I
>> can adjust it. I'm hoping that solves the problem.
>>
>> Thanks for the warning. I signed the paper work today but I'm going to
>> call the dealer tomorrow and discuss this point. But they are already
>> aware that the back room is a problem with the current unit.
>>
>> Chuck Norcutt
>>
>>
>> On 12/6/2012 8:13 PM, Jim Nichols wrote:
>>> Chuck, you just opened up a can of worms that annoys my wife enough that
>>> I
>>> hear about it every Winter day. I replaced an older outdoor pack with
>>> the
>>> latest from Carrier, several seasons ago. The local dealer is reputable,
>>> and had his engineer review the requirements, and recommend a new unit.
>>>
>>> In my house, the master bedroom is on the opposite end of the house from
>>> the
>>> heating unit. Previous furnaces over 40 years had heated the bedroom
>>> adequately. With the high-efficiency Carrier unit, the temperature of
>>> the
>>> air from the burner is reduced. With the thermostat in the center of the
>>> house, the warm air barely reaches the back bedroom before the cycle
>>> ends.
>>> Hence, the room, and its adjoining bath, are forever cold, unless the
>>> thermostat setting is raised.
>>>
>>> I have tried regulating with the registers and the one damper that I have
>>> in
>>> a branch, to no avail. Perhaps I need to move the thermostat to the
>>> bedroom!
>>>
>>> My advice is to look into such problems before you make a choice.
>>> Unfortunately, burner exit temperature is seldom discussed. They just
>>> rave
>>> about efficiency.
>>>
>>> Jim Nichols
>>> Tullahoma, TN USA
>>> ----- Original Message -----
>>> From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx>
>>> To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
>>> Sent: Thursday, December 06, 2012 6:51 PM
>>> Subject: Re: [OM] OT: Air-source Heat Pump?
>>>
>>>
>>>> My 19 year old gas furnace is scheduled to be replaced next Tuesday with
>>>> a newer, 96% efficiency gas furnace. Was I pursuing noble goals with a
>>>> more efficient device? No, just trying to avoid death. :-)
>>>>
>>>> It appears that the old furnace has small cracks in the heat exchanger
>>>> and is releasing small amounts of CO into the house. Not enough to set
>>>> off the CO detectors yet (only 3ppm measured next to the heat exchanger)
>>>> but worrying for the future nonetheless.
>>>>
>>>> This is a known problem with this Lennox Pulse model furnace. The Pulse
>>>> designation comes from its operation as a continuous series of tiny
>>>> explosions (sort of like a ram jet). The vibrations may eventually
>>>> induce cracks in the heat exchanger and they finally have. Fortunately,
>>>> there's another year left on the 20 year warranty. Unfortunately, there
>>>> are no replacement heat exchangers. So I'm getting an $1,100 rebate
>>>> from Lennox on the cost of a new furnace. Even so it's still $3,300 of
>>>> unexpected expense. :-(
>>>>
>>>> Chuck Norcutt
>>>>
>>>>
>>>> On 12/6/2012 7:14 PM, Rob Harrison wrote:
>>>>> We are just now in the midst of an energy retrofit for our house that
>>>>> includes replacing the 1973 gas conversion burner on the original 1950
>>>>> boiler (50% efficient) and 1994 electric hot water tank with a new (95%
>>>>> efficient) condensing boiler and indirect-fired hot water tank, as well
>>>>> as
>>>>> air sealing and adding R-60 insulation to the attic, and new
>>>>> Energy-Star
>>>>> refrigerators for us and our mother-in-law apartment. Through a local
>>>>> program, Community Power Works, we were able to get a low-interest loan
>>>>> to
>>>>> do the work. The loan is repaid on our City Light electric bill. The
>>>>> savings we'll get will easily pay for the loan now, and we will be
>>>>> better
>>>>> off as energy rates increase over the life of the loan. If we sell the
>>>>> house, the loan can stay with the house. This gets around the whole
>>>>> "simple
>>>>> payback" issue.
>>>>>
>>>>> In my practice ground-source heat pumps rarely have made sense.
>>>>> Air-source
>>>>> heat pumps are so much better (higher COPs) and less expensive these
>>>>> days.
>>>>>
>>>>> Rob in Seattle
>>>>>
>>>> --
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>>>>
>>>>
>>>
>>>
>> --
>> _________________________________________________________________
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>>
>>
>
>
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