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Paul

Paul

Joined on March 5, 2004

Last Post on January 13, 2006

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bfu

@ January 13, 2006 9:45 PM in Buderus 2107

I am using the bfu room sensor with constant circulation.

Buderus 2107

@ January 13, 2006 9:37 PM in Buderus 2107

I noticed that the circulator pumps switch off when changing from the day mode (70*) to the night mode (66*).Is this because the room temperature is still 70* and that the pumps are off because no additional heat is needed. Will the pumps switch on again when the temperature reaches the night setting of 66*.

Buderus 2107

@ January 13, 2006 9:37 PM in Buderus 2107

I noticed that the circulator pumps switch off when changing from the day mode (70*) to the night mode (66*).Is this because the room temperature is still 70* and that the pumps are off because no additional heat is needed. Will the pumps switch on again when the temperature reaches the night setting of 66*.

Make sure

@ July 15, 2005 2:31 PM in Buderus Logamatic

that AC wireing to the L8148 controler is correct. High to L1 and low to L2 and wire between terminal 8 on the 2107 and C1 on the L8148 aquastat.

Hot water migration trap

@ April 24, 2005 12:27 PM in Hot water migration trap

I want to install a hot water migration trap on my DHW tank on the domestic side. I think the length should be 18 inches. Is this correct?

Return bend

@ April 20, 2005 8:22 PM in Return bend

Is there a 1/2in. fitting in copper called a returned bend?

Great picture....

@ April 20, 2005 5:54 PM in found it!

@ April 16, 2005 11:57 AM in Ideal street pressure

domestic water

Ideal street pressure

@ April 16, 2005 11:37 AM in Ideal street pressure

What is the ideal water pressure coming into a house?

gas burner orifices

@ April 9, 2005 7:26 PM in A source for gas burner orifices

Why does a gas burner orifice go bad??

Banging

@ April 7, 2005 7:09 PM in Banging Pipes

How long should the air chamber be and which size pipe to use??

Banging Pipes

@ April 7, 2005 6:01 PM in Banging Pipes

Is there something I can install on my hot and cold pipes to stop the banging when closing the taps?

Expansion Tank

@ April 4, 2005 7:56 PM in Expansion Tank

I have a blader type expansion tank on my system. Can I just remove the water pressure and then test the air pressure or must the tank be removed from the system before testing.

Down firing the Buderus G124X25

@ January 28, 2005 10:40 AM in Down firing the Buderus G124X25

I want to down fire my Buderus G124X25 gas boiler by plugging the right most of the three burners. I would also change the nozzles on the remaining two burners to make the boiler look like the smaller Buderus G124X18. It may not operate perfectly but I think it is doable.

Flow Check Head Loss

@ January 25, 2005 9:06 PM in Flow check head loss

Whst is the head loss of a 3/4 B&G Flo Check. The kind used to prevent heat flow.

Thank you

@ January 25, 2005 9:01 PM in Heating loop length

> Like most things in hydronics the answer is, "it
> depends."
>
> But, using the below generally
> regarded "safe" parameters of:
>
> 1) 20°
> temperature drop in the loop
>
> 2) 1 gpm
> flow
>
> 3) 170° AVERAGE water temperature
> (assumes 180° supply and 20° temperature
> drop)
>
> 4) 480 btu/hr per foot of baseboard
> (65° entering
> air)
>
> --------------------------
>
> One gallon
> per minute of flow @ 20° temperature drop gives
> you 10,000 btu/hr to work with.
>
> 10,000 / 480 =
> 20.833' of baseboard max @ 1
> gpm.
>
> --------------------------
>
> With 2 gpm
> of flow @ 20° temperature drop you get 20,000
> btu/hr to work with.
>
> 20,000 / 480 = 41.666' of
> baseboard max @ 2
> gpm.
>
> --------------------------
>
> With 3 gpm
> of flow @ 20° temperature drop you get 30,000
> btu/hr to work with.
>
> 30,000 / 480 = 62.5' of
> baseboard max @ 3
> gpm.
>
> --------------------------
>
> With 4 gpm
> of flow @ 20° temperature drop you get 40,000
> btu/hr to work with. 4 gpm is the the highest
> recommended flow rate and baseboard output can
> now be considered to be 510 btu/hr per foot with
> 4 gpm of flow.
>
> 40,000 / 510 = 78.43' of
> baseboard max @ 4
> gpm.
>
> --------------------------
>
> To compute
> flow you must first find the head loss in the
> loop including all fittings, etc. Then select a
> circulator that will move the desired amount of
> water at that head
> loss.
>
> --------------------------
>
> If you
> design for a 30° temperature drop in the loop
> (again considered near the maximum safe design
> level) each gallon per minute of flow will now
> move 15,000 btu/hr. BUT, the average temperature
> will now be lower at about 165° (assuming 180°
> supply) so each foot of baseboard will be putting
> out slightly less heat.

Heating loop length

@ January 25, 2005 4:02 PM in Heating loop length

What is the maximum length heating loop the can be made with ľ inch copper pipe?

How did you do that? Please show scematic

@ January 21, 2005 8:55 PM in Taco SR502 zone relay board

How did you do that? Please show scematic.

@ January 21, 2005 8:42 PM in Taco SR502 zone relay board

If the

@ January 12, 2005 9:57 PM in Buderus Heating Curve Adjustments

REF. TEMP is set to some value at 14*F, then I would think the value read at 14*F using HTG CURVE 1 should be the same. What am I missing???

In the manual

@ January 12, 2005 9:06 PM in Buderus Heating Curve Adjustments

the tempuratures are listed in Fahrenheit.

Buderus Heating Curve Adjustments

@ January 12, 2005 8:06 PM in Buderus Heating Curve Adjustments

If the 2107 controller is programmed with a REFERENCE TEMP of 140* "boiler temp" for 14* "outside temp" and then I switch to HTG CURVE 1 to read three points on the boiler temp curve, the boiler temp is 153* for 14* outside temp. Why are the temperatures different at 14*?
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