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Buderus indirect hotwater

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RoosterBoy
RoosterBoy Member Posts: 459
hi I am having a g115 model 28 installed it's rated at 98,000 D.O.E OR 85,000 I.B.R

will the Lt160 or L160 hot water heater that's rated at for 93.000 btu and my heat load being 53,000 be ok for this boiler

to supply both my heat load and hot water with out boiler short cycle problems

thanks
RoosterBoy

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  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
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    what is your....

    demand... lots of teenagers, lots of laundry, many showers, jetted tub?kpc

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  • RoosterBoy
    RoosterBoy Member Posts: 459
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    no I have 2 people that take showers each day. the tank I want installed will be 42gl. and I do want a jet tub in the bathroom to soak my feathers after a nice long day :-)
  • Paul Pollets
    Paul Pollets Member Posts: 3,658
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    Use the 53g tank

    if you want to fill the tub. For more capacity, set up the tank at 140, and place a tempering valve at the HW tank outlet. That will increase DHW tank capacity. There's a small $$ difference between the 42g and 53g tank. Ask for the R2107 Logamtic control for outdoor reset and DHWT priority, then watch your fuel bills get smaller. The recovery time for DHW depend on boiler input,the temperature of the incoming cold water and setpoint temp. The tank recovery times can be found in the Buderus technical literature. You should be able to download the charts, if you don't have a Buderus catalogue.

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  • RoosterBoy
    RoosterBoy Member Posts: 459
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    but will my boiler hold the load for both my heating and DHW the 42 gal needs 93,000 btu
    and the boiler that my contractor is installing is rated for 98.000 D.O.E
    my heat load here is around 50,000

    i will go with the 2109
  • Paul Pollets
    Paul Pollets Member Posts: 3,658
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    Answer

    The smaller the input to the DHWTank coils, the slower the tank recovery. If the boiler control is dedicated to priority DHW recovery, the 42g indirect tank should recover in 10-15 min, depending upon incoming CW water temps. This again, presumes you're using the R2107 control or other reset control. Using the correct control means when the tank needs recovery, it shuts off any heating pumps, ramps the boiler to high temp, recovers the DHWTank, then turns on the heating pumps. In the summertime, the boiler only turns on to recover the DHWT. Use the 2109 if you can't afford the 2107. You won't be able to enjoy the capabilities of the system without the control. It's sort of like having a nice car but no steering wheel. Vishtaish?

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  • I just have to laugh.

    I love the rooster boy collage. Who's eyes did you use? are you for real?

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  • I just have to laugh.

    I love the rooster boy collage. Who's eyes did you use? are you for real?

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  • RoosterBoy
    RoosterBoy Member Posts: 459
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    yes it's me i put my face on it here is another one of me

    what i do is take pictures of myself and then make funny picture out of them with photoshop

    hope you like :-)

    i cant waite to get my boiler set with indirect and the 2109 controler :-) thanks everyone

    oh and if you need photowork like this done let me do it for you :-) i can do anything just need a face.
    i owe you guys here you have all been so helpful to me in picking out my new system buderus g115 model 28 with buderus lt160 indirect with 2109 controler i am haveing it all installed in 3 weeks i will update everyone with the pictures when it's done
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