johncomyn
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| 11/13/2008 11:00 AM |
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Hi
I have a Climate Master Tranquility 27 4 ton unit. Just wondering how second stage is activated. I find if I set the thermostat 5 degrees above the current set point it will turn on in second stage. So if 1st stage can maintain the set temperature running continuously 2nd stage will never turn on. Is that correct? That means that 2nd stage will only turn on if the temperature drops by 5 degrees.
Would it not be better for it to turn to 2nd stage if the unit has been running for a certain amount of time?
Thanks
John
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geodean
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| 11/13/2008 12:55 PM |
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| Second stage is controlled by the thermostat. Some stats have a time setting, others have a temp setting. It sounds like yours is controlled by temp. What brand and model of stat do you have? |
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Dewayne Dean
PalaceGeothermal.com
Why settle for 90% when you can have 400%
We heat and cool with dirt!
visit- http://welserver.com/WEL0114/- to see my system |
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johncomyn
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Masoud
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| 11/13/2008 11:23 PM |
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John, I think you can select at what temp differential from a set point, the second stage will run. I have a ClimateMaster ATP32U02 programmable thermostat which shares the same user's manual with ATA32U01. I can go to MENU - SETTINGS -OFFSETS, and then select DIFFERENTIAL. Then, I can set temp differentials from a set point at which the 1st stage, the 2nd stage, and aux heat will engage.
Regards, Masoud |
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johncomyn
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| 11/18/2008 11:17 AM |
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Thanks for the replies guys.
Last night the temperature was about 20 degrees, my heat pump pretty much ran continuously all night in first stage. The heat pump seems to be able to maintain the set temp with never turning off or turning to 2nd stage.
Not sure if it is running correctly. My design temp is around 0 degrees which is considerably colder.
Thanks
John |
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engineer
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| 11/18/2008 2:38 PM |
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Sounds like it is running correctly
2nd stage will add approximately 50% of 1st stage capacity (Another way to look at it is that 1st stage is 67%, 2nd stage is 100%). System is most efficient in 1st stage, so it is ideal if it runs most often in 1st
If yours holds inside temp in low stage with outside at 20 degrees, chances are it'll hold inside temp in high stage with outside temp at 0 degrees, as deseigned. |
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Without data, you only have an opinion. |
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johncomyn
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| 11/20/2008 10:42 AM |
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I have another question.
Would it be more economical for me to setup the strip heater to come on after the heat pump has been running for say an hour? As apposed to the heat pump running contionously in first stage?
On my thermostat there is a option:
"SMART HEAT STAGING (HEAT PUMP ONLY)
This will allow the thermostat to engage in 3 rd stage heating if needed.
Options are ON or OFF. Default is OFF. Range for this are 0-120 minutes
in 5 minute increments, if set to ON. 30 minutes is the default time. This
is the time before the electric heat is engaged."
I presume this is to engage the strip heater. It is set to off at the moment, should I turn it on? And for how long?
Thanks
John |
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engineer
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| 11/20/2008 7:29 PM |
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Strip is 3-5 times more expensive to run than geo heat. Assuming I understand your question correctly it would be cheaper to delay it as long as possible.
As with everything there is a tradeoff - during the 120 minute delay the room temp may fall a bit below thermostat setpoint, resulting in discomfort.
I don't quite understand the off / on aspect - it may be that 'off' means no delay in strip heat - comes on whenever setpoint exceeds room temp by a given number of degrees. 'On' institutes a selectable, up to 120 minute delay, allowing sudden increases in thermostat setpoint to be initially met by geo alone.
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Without data, you only have an opinion. |
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geodean
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| 11/20/2008 7:59 PM |
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| If you are thinking about turning on the strip heat before second stage, don't. For the reasons that engineer stated above |
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Dewayne Dean
PalaceGeothermal.com
Why settle for 90% when you can have 400%
We heat and cool with dirt!
visit- http://welserver.com/WEL0114/- to see my system |
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conniepangan
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| 11/20/2008 8:06 PM |
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| Geo, when does the strip kicks in if I have a 1 stage only ? Say my thermostat is set at 68 degrees and the outside temp is 30 degrees? |
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geodean
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| 11/20/2008 8:29 PM |
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Posted By conniepangan on 11/20/2008 8:06 PM
Geo, when does the strip kicks in if I have a 1 stage only ? Say my thermostat is set at 68 degrees and the outside temp is 30 degrees?
It depends entirely on your thermostat. What brand and model do you have?
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Dewayne Dean
PalaceGeothermal.com
Why settle for 90% when you can have 400%
We heat and cool with dirt!
visit- http://welserver.com/WEL0114/- to see my system |
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conniepangan
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Posts:107
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| 11/20/2008 9:06 PM |
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| It is Geocomfort R410A single stage split system. |
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geodean
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| 11/20/2008 9:21 PM |
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Connie, what brand and model thermostat do you have?
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Dewayne Dean
PalaceGeothermal.com
Why settle for 90% when you can have 400%
We heat and cool with dirt!
visit- http://welserver.com/WEL0114/- to see my system |
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johncomyn
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Posts:23
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| 11/20/2008 9:48 PM |
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As far as I can work out, "OFF" the strip heat will never turn on. If set to ON it will kick in after the amount of time set.
This is where I am having a hard time, if I set it to ON, to the max it will turn on after 120 min. 2nd stage heat only comes on if the temp drops by a 4 degrees. But if 1st stage can maintain that temp the strip heat will turn on after 120min, without 2nd stage ever turning on.
The Differential mentioned before on my thermostat are all set to 1 degree for 1st stage, 2nd stage, and Aux Heat. Not sure how to change those so 2nd stage kicks in sooner.
To me it would be better if second stage turned on after a specified amount of time, and Aux heat turned on when the temp dropped a specific amount of degrees.
Thanks
John
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jambsi
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| 11/23/2008 10:12 AM |
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Just a note about what the thermostat settings control (& don't!).
i have a a 2 zone system which includes a zone control board. The thermostats 'talk' to the zone control board, which in turn talks to the Tranquility 27.
It seems / I'm told, this dumbs down the thermostat to just calling for heating/coolding in a zone, all other 'decisions' are made by the zone control board which may or may not have these 2nd, 3rd stage options. |
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Ottawa, Ontario, Canada |
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geodean
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| 11/23/2008 10:34 AM |
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Posted By johncomyn on 11/20/2008 9:48 PM
To me it would be better if second stage turned on after a specified amount of time, and Aux heat turned on when the temp dropped a specific amount of degrees.
Thanks
John
This would seem the better way to me also. You might need to change tstats to get that option.
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Dewayne Dean
PalaceGeothermal.com
Why settle for 90% when you can have 400%
We heat and cool with dirt!
visit- http://welserver.com/WEL0114/- to see my system |
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tsmithks
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Posts:3
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| 11/24/2008 12:03 PM |
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Is this overkill?
I live in southern Kansas. It gets hot and humid in the summer and windy and cold in the winter. I am in the planning stages for a new home. The home will either be an ICF house or standard 2x4 construction with closed cell foam in the walls. Full basement, not a view out to limit heat loss through windows. Double pane vinyl windows and I will spray closed cell foam on every opening in the ceiling drywall. (We live in a 100+ year old house and are tired of drafts.)
My brother-in-law just installed a Climate Master Tranquility 27 and loves it in his older home. Although the water coming out of the unit in the summer is luke warm, indicating to us that the unit may be oversized for the application. There are a few things I want to do and I am just wanting an opinion to see if this is overkill.
1. Install the Tranquility 27 mainly for the A/C. I will use the hot water heater option to pre-heat water for a Rheem on-demand hot water heater. In the fall and spring, we usually open the house up for 2-3 months for each season, so the unit would not run continuously, thereby limiting hot water availaility from the unit. Thus the need for the on-demand hot water heater.
2. Install radiant floor heat and use the heat pump for a back-up or supplemental heat souce in the winter ro to keep the radiant floor heated air circulating via the fan only option. We are planning on installing the radiant floor heating in the basement and the main floor and will employ a professional contractor to install it and the solid wood flooring. (I can DIY the installation of the hardwood floor, but I want someone to go back on if they hit a water line in the floor heating system.)
The configuration I am looking at uses two wells, one for supply one to dump the water back into. (This is allowed in Kansas if the sytem is a closed system.) I have not seen any discussion regarding the efficiency of the different systems ( horiz. loop, vert. loop or open loops. Does anyone have any experience or information on the different types of ground sources? I have found the thread about the horiz. v. vert loops, but not about the open source configuration.
Thanks in advance for your opinions and help. This website has been a wealth of information.
Terry Smith |
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shearers
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Posts:7
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| 11/24/2008 2:25 PM |
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I have a Tranquility 27 installed Oct 3, 2008 and have questions about whether it is functioning properly.
The thermastat is set at 18 celcius (64F). Now that the outside temp is -10 to 0, the fan runs constantly even when the thermastat reads 18 C. The temp of the air coming from the grills is 12 C (53 F). This cool air movement makes the room uncomfortable even though it is at the set temperature of 18 C. Is this the Stage 1 function of the furnace, or is there a problem with the system? When the furnace kicks in, the air temp from the grills is 25 C and the air movement does not chill the house.
Anyway, is this the way the furnace operates, or is there some way to stop the cool air movement? |
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johncomyn
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Posts:23
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| 11/24/2008 3:02 PM |
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Shearers, is your thermostat set with the Fan on, or auto?
If set to On the fan will run even when the heat pump is not.
John |
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johncomyn
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Posts:23
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| 11/24/2008 3:04 PM |
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When the heat pump is running the temp at the registers should be around 32 C (90 F).
John |
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