Is Carrier 59MN7A060... really a modulating furnace?

[CurbYourEnthusiasm]

I am looking at installing a Carrier furnace: 59MN7A060V17-14.

The product booklet says ‘Fully Modulating Gas Valve — When paired with the InfinityR control, this furnace improves comfort by adjusting heating output in 1% increments from 40% to 100% capacity to meet the heating needs of the home.’

'M' in the furnace model number stands for modulating but this 'When paired with the InfinityR control' has me 'worried'.

Is the furnace modulating only with this control?

The contractor told me the control would cost extra, the improvement in efficiency would be negligible and the furnace would be still modulating without it.

I would like to confirm it.

[beenthere]

I believe its only 3 stages without he Infinity controller.

[FlyersFan]

From the installation guide

"A single stage or two--stage heating and
cooling thermostat can be used with the furnace. The furnace control board CPU will control the furnace and outdoor unit staging. A two stage heating and cooling thermostat can also be used to control the staging. However, full modulating capability will not be available when the furnace staging is controlled by the thermostat. Furnace staging will be limited to Minimum and Maximum inputs or Intermediate and Maximum inputs depending
on the configuration of set-up switches SW1-2 and SW4-2."

[dan sw fl]

EVEN brochure say$ Infinity control required.
So, pay for the Infinity Control.

http://www.docs.hvacpartners.com/idc...858-581-25.pdf

The problem is it seems to have been written by a lawyer.

"Our modulating gas valve helps the Infinity 98 efficiently
deliver the ideal heating capacity for current conditions
when the Infinity control is included with your system.
By continuously adjusting heating output up and down
through multiple stages in 1% increments, this furnace
precisely matches your comfort needs. Most other
furnaces can provide only one or two stages of heating
and must start a new heating cycle to reduce heating
capacity as conditions change."

[CurbYourEnthusiasm]

Thank you for the answers.

I got offers from a other contractors and all of the furnaces were 2 stage (Trane, American Standard, KeepRite). I was surprised that the modulating Carrier 59MN7A… was not more expensive than the competitors’ and I wondered why would anyone go with a 2 stage furnace?

I don’t mind paying more for better efficiency? But I do mind paying even 1 penny more if the furnace does not do what I was told it would do.

‘The problem is it seems to have been written by a lawyer.’ So true .
59MN7A has the ‘M’ for modulating, but it is not unless this control is added, they should specify this very clearly.

Now I don’t know to believe about the contractor I was very much inclined to go with.

1. Either he did not know – even if he should – that the 59MN7A… is not modulating without the control so unknowingly he tried to sell me functionality that couldn’t be achieved. I would kind of ‘accept’ it and let it go if this was the case.

2. This was a marketing ploy to buy a more expensive one as in he (i.e. me) would not mind paying $ more than the quoted 2 stage Carrier 59TNA6A for the perceived extra efficiency but I would lose him as a customer if I asked extra $ (the controller is around $). And in this case I would not want to work with them. Tell me frankly all the options and let me choose but don’t play ‘tricks’ on me.

And once installed I would not have been in a position to determine whether the furnace is modulating or not.
The contractor told me that most of their clients go with the 5MN7A but I am sure they have no idea that their furnace is not really modulating as they do not have the controller. And I wish I was like them. The less you know the happier you are .

[Mr Bill]

And once installed I would not have been in a position to determine whether the furnace is modulating or not. The contractor told me that most of their clients go with the 5MN7A but I am sure they have no idea that their furnace is not really modulating as they do not have the controller. And I wish I was like them. The less you know the happier you are .

Maybe this is the contractors motto "what the customer don't know don't hurt me"

[beenthere]

Prices are not permitted here.

[BaldLoonie]

The best control of anybody's top system is their matching thermostat. Trane's will modulate but only by timer on a basic thermostat. Rheem's will become a timed 3 stage, only modulates with their special stats. If you don't want to buy the Infinity control, get a 2 stage furnace and a 2 stage stat for lots less.

[Freezeking2000]

Even with a single stage thermostat most modulating furnace do modulate and work very well.

We install many on old zoning systems that are single stage and I am always surprised how well the built in logic works even with zoning.

[motoguy128]

S without a communicating thermostat a a modulating furnace will modulate up on a timer but won't modulate back down and hold a steady for rate. A 2 stage furnace with a good 2 stage thermostat will stage back down to 1st stage and remain there.

I think there are very few circumstances where you wasn't an infinity furnace without Assn infinity control. Better to stick with the performance series.

Sent from my DROID RAZR using Tapatalk 2

[CurbYourEnthusiasm]

Called Carrier - yes, this is how I spend the day after Christmas - and they confirmed that I would need the control to make the furnace ‘modulate’. The 1st CSR could not answer to my question so I was transferred to a senior CSR who in fact read from the product data that I also had.

However, now after talking to Carrier I know for sure the Infinity control is a thermostat. I had thought before it was something you install on the furnace itself not something that replaces the thermostat (programmable or not) that you put it up the wall.
My idea was to just install the furnace without this control and later on add the control as now I know that the ‘M’ in 59MN7A stands for ‘Can Modulate’ not ‘Modulate’ but the CSR told me to put it this at the beginning as to make sure everything works ok.

[dan sw fl]

Called Carrier - yes, this is how I spend the day after Christmas -
and they confirmed that I would need the control to make the furnace ‘modulate’.
The 1st CSR could not answer to my question so I was transferred to a senior CSR who in fact read from the product data that I also had.

However, now after talking to Carrier
I know for sure the Infinity control is a thermostat.
I had thought before it was something you install on the furnace itself not something that replaces the thermostat (programmable or not) that you put it up the wall.

My idea was to just install the furnace without this control and later on
add the control as now I know that the ‘M’ in 59MN7A stands for ‘Can Modulate’
not ‘Modulate’ but the CSR told me to put it this at the beginning as to make sure everything works ok.

So after EIGHT (8) confirmations ( & rereading same sheet), it's Clear that it takes a Specific Thermostat to modulate,
+
You get what You pay for!

I guess now the issue is to
find a Carrier contractor who knows how to install a Specific Thermostat.

[ParamountAir]

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[beenthere]

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Further infractions may result in loss of posting privileges.

[tiger man]

I am looking at installing a Carrier furnace: 59MN7A060V17-14.

The product booklet says ‘Fully Modulating Gas Valve — When paired with the InfinityR control, this furnace improves comfort by adjusting heating output in 1% increments from 40% to 100% capacity to meet the heating needs of the home.’

'M' in the furnace model number stands for modulating but this 'When paired with the InfinityR control' has me 'worried'.

Is the furnace modulating only with this control?

The contractor told me the control would cost extra, the improvement in efficiency would be negligible and the furnace would be still modulating without it.

I would like to confirm it.

We only sell this furnace with the infinity control, definitely worth it.