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Author Topic: Added new Honeywell Temp controller to 400  (Read 8154 times)

tinfoilhat2020

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Added new Honeywell Temp controller to 400
« on: January 16, 2016, 06:29:43 PM »

I installed a Honeywell T775 series 2000 controller this weekend....Much more accurate and has a lot of features I can mess with later if I choose too. Running 165-180. Stove is running great. All gauges and aquastat are getting the same readings...also took chimney cap off and found I'm getting a much better draft. Getting 12hrs on a 1/2 load in 20° temps heating 4000sqft.

Thanks!
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RSI

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Re: Added new Honeywell Temp controller to 400
« Reply #1 on: January 16, 2016, 09:05:29 PM »

Looks like a nice controller.
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heat550

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Re: Added new Honeywell Temp controller to 400
« Reply #2 on: January 18, 2016, 12:59:54 AM »

That's way fancy. Here I thought I was getting carried away putting on a old style high limit stat.  ;D
keep us posted how it works . can you set it so if outside temp is calculated to set point of draft fan .
so lets say its 30 f outside it could change to water 150f high ? -30f outside 180f . Just wondering .
Not that I want to save wood or anything . :thumbup: It work great if your using dry wood all the time .


Heat550
« Last Edit: January 18, 2016, 01:21:24 AM by heat550 »
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tinfoilhat2020

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Re: Added new Honeywell Temp controller to 400
« Reply #3 on: January 18, 2016, 04:47:20 AM »

Yes, u can see schedules....and also hook up multiple sensor probes....u can do a lot with this thing. Only $120. Very happy with it...for now I'm just using it as the hi limit stat
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heat550

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Re: Added new Honeywell Temp controller to 400
« Reply #4 on: January 26, 2016, 02:32:12 AM »

Yes, u can see schedules....and also hook up multiple sensor probes....u can do a lot with this thing. Only $120. Very happy with it...for now I'm just using it as the hi limit stat

Was reading manual and dreaming of saving wood  . You know if you could set it like 15f outside and above 150f  and 10f and 160f  0f 170f and -10 to 180f  bet person could save a lot of wood . and on far dreaming side you could put above 15f shut off back fan .  Seems switch could do all this . pretty awesome . where did you get it ?  next I want app on phone so I know what its doing :) can always point a net cam at it to remotely know what its doing . :) here is my netcam temp app I have now .  meat thermometer taped to a copper pipe and belkin netcam with night vision . anywhere there's internet  I check my boiler temp. :thumbup:

Heat550
« Last Edit: January 26, 2016, 02:38:24 AM by heat550 »
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tinfoilhat2020

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Re: Added new Honeywell Temp controller to 400
« Reply #5 on: January 26, 2016, 05:00:05 AM »

nice heat....you can do a lot with this controller....you can buy a model that comes with 2 temp sensors and also 4 relays and 2 analog outputs... u could run one temp sensor to outside to read outside temp and configure it that way. be pretty cool. I may look into it in the spring after shut down. I have a few other things im going to play around with....definitely going to modify that baffle in the back....i need air flow over the coals as well
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hondaracer2oo4

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Re: Added new Honeywell Temp controller to 400
« Reply #6 on: January 26, 2016, 07:32:41 AM »

Sounds like you can use it as an outdoor reset control. The problem with running the boiler cooler is that you get condensation issues and possibly hot and cold spots. I think you guys are on the right track as far as trying to save some wood but I think where you need to reduce the temp is via a thermostatic mixing valve in the house supplying the house with the coolest water temp that will satisfy the heat load. The most efficient way to save wood is to have a large storage that you charge up with your hot water and then run the temp in the storage down to the lowest point that will still meet the heat load demand in the house. Running cooler boiler temps I think just cause problems in the metal in the boiler.
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tinfoilhat2020

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Re: Added new Honeywell Temp controller to 400
« Reply #7 on: January 26, 2016, 09:16:44 AM »

i dont run my boiler lower than 172. my current setting is 172-185. runs like a top. I agree running only leads to issues IMO. i just use this honeywell as a limit controller, although it is capable for me to do more with it.
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heat550

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Re: Added new Honeywell Temp controller to 400
« Reply #8 on: January 26, 2016, 12:49:05 PM »

Well I dont know anything about condensating issues. With lower boiler temps. My old 200css ran for 19 years 170f to 150f on fan control . reason it took a dump was engineering flaw in 1994 . now my 400dcss is set at 160f to 145f on the control all buildings are to temp even at subzero. Heating 6600sqft. I never did understand why water having to be 180f. I do understand if I put it to 180f it does take even more wood .  this might be more to do with how your heat transfer is in the buildings needing to have temp at 180f . but Im always open to ideas or ways to not burn as much wood . but my findings are higher boiler temps higher wood volume. Until I can be proved wrong. Always open to ideas. :thumbup: Im at 7.5 cord so far this year. I have one house running 74f-76f other house 65f to 70f.

Heat550

« Last Edit: January 26, 2016, 12:56:27 PM by heat550 »
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slimjim

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Re: Added new Honeywell Temp controller to 400
« Reply #9 on: January 27, 2016, 04:17:55 AM »

Heat, most homes with hydronic heating are planned out by the builder to have enough radiation in the baseboard, hot air ducts or true radiant in floor to heat the building at 180 degree water within the heat loops, if you are able to heat yours with 160 degree water then enough radiation was installed to do so, most homes are not! Higher heat loss at higher water temps are going to always be a factor BUT with the newer high efficiency gassers, stack temps at the breach of the boiler are a huge factor, measuring that stack temp tells a great deal about the stove.
  Example, I have measured my old WoodDoctor when it is running hard, at times it will reach a stack temp of over 1200 degrees with flames coming out of it's stack!
 Last February I ran a HeatMaster G 200 ( severely undersized for my load ) we ran the snot out of that poor little boiler in order to keep up with my load, I monitored the stack temps on it and never once saw it exceed 450 degrees.
 Both boilers were set at 180 off and 160 on!
Have you ever measured your stack temps?
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tinfoilhat2020

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Re: Added new Honeywell Temp controller to 400
« Reply #10 on: January 27, 2016, 04:46:33 AM »

Good Point Slim,

I measured stack temps during the last cold spell we had while the boiler was running hard. I averaged in the area of 450-600 depending on the night. I noticed a bit of higher stack temps on the -20°F nights. I assume that was from it working its but off. I havent noticed flames at all yet. I am running 172-185. I also have Radiant Baseboard heat like u mentioned. 160°F water doesnt do much for me when its -20°F out. I assume those lower water temps may be sufficient in warmer weather perhaps.
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mlappin

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Re: Added new Honeywell Temp controller to 400
« Reply #11 on: January 27, 2016, 03:05:08 PM »


 Last February I ran a HeatMaster G 200 ( severely undersized for my load ) we ran the snot out of that poor little boiler in order to keep up with my load, I monitored the stack temps on it and never once saw it exceed 450 degrees.


Out of curiosity how much were you heating and did it keep up other than maybe having to fill it 3-4 times a day? I think you mentioned 6800 sq ft at one time.
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heat550

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Re: Added new Honeywell Temp controller to 400
« Reply #12 on: January 27, 2016, 08:16:01 PM »

Interesting I will post stack temp next cold night. I know my old 200css ran 350f to 425f at colder then -10f. It be tricky to test new 400dcss its got insulated extension .  Im sure heat loads are big factor in what boiler temp you can get by with.

Heat550
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slimjim

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Re: Added new Honeywell Temp controller to 400
« Reply #13 on: January 28, 2016, 02:26:54 AM »

Yes, about 6800 ft, my shop is 32 x 40 gambrel style with a couple of billiards tables and 2 well used refrigerators upstairs, there is almost no insulation in the shop, heated to at least 55 all winter. Burn times on the G 200 were 8-10 hours with a FULL load.
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heat550

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Re: Added new Honeywell Temp controller to 400
« Reply #14 on: January 28, 2016, 02:57:22 AM »

Heat, most homes with hydronic heating are planned out by the builder to have enough radiation in the baseboard, hot air ducts or true radiant in floor to heat the building at 180 degree water within the heat loops, if you are able to heat yours with 160 degree water then enough radiation was installed to do so, most homes are not! Higher heat loss at higher water temps are going to always be a factor BUT with the newer high efficiency gassers, stack temps at the breach of the boiler are a huge factor, measuring that stack temp tells a great deal about the stove.
  Example, I have measured my old WoodDoctor when it is running hard, at times it will reach a stack temp of over 1200 degrees with flames coming out of it's stack!
 Last February I ran a HeatMaster G 200 ( severely undersized for my load ) we ran the snot out of that poor little boiler in order to keep up with my load, I monitored the stack temps on it and never once saw it exceed 450 degrees.
 Both boilers were set at 180 off and 160 on!
Have you ever measured your stack temps?

My 2 cents and findings

yes will report back on stack temps.

Heres a good point about the whole deal . That gets over looked . I like baseboard heat no fan running . But at the price of a air ex changer and fan . to kick on at subzero .  You cant go without it $100 air exchanger and $75 fan bit wood or sheet metal . you'll save so much wood .  Its unbelievable what kind of heat you can get out of a air ex changer I have a 12x18 with 2 booster fans and a 35 dollar shop fan all pointed at it to test was total of 1200 CFM fan  . House was right up to 76f and fans were shutting off in the house at -18f  It was pulling only 13 degrees off boiler  7-10GPM  House its 1344sqft  1991 this was a eye opener . another way I tested with my old 200css was I put a smaller fan that was quit but ran all the time . that works awesome also and only pull little amounts off boiler . Air exchangers are throwing heat at 90-100f  and when boiler hits 160f  the heat output is amazing . air temp showed 138f  coming off exchanger but 1200CFM behind it .  Most you guys probably know this but It made me rethink my install . and will have air exchanger to kick on at subzero and run a couple ducts . just to recap Im managing 3 zones off my 400 2 houses garage and shop .  the one house only has baseboards this ones getting redone next summer . 

Heat550

Below is a boiler temp snap shot . I think its easy 2 figure out running 3 zones .
« Last Edit: January 29, 2016, 01:04:46 AM by heat550 »
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