[rick]

Baxi Barcelona, which has been upgraded to 100He spec

On the original control board there were 2 jumpers ..
Both were removed as this boiler is connected to a thermal store

J1 to set to 100,000Btu/h
J2 to turn off modulation

New board has 4 jumpers
J1 Red
J2 Blue
J3 Blue
J4 Yellow

Am I correct that J1 & J2 are the same .. and therefore should be
removed ... and removing J3 should also be done to prevent limiting of
output temperature

J4 remains as this is a standard short flue

[Mark]

rick wrote:

Baxi Barcelona, which has been upgraded to 100He spec

On the original control board there were 2 jumpers ..
Both were removed as this boiler is connected to a thermal store

J1 to set to 100,000Btu/h
J2 to turn off modulation

New board has 4 jumpers
J1 Red
J2 Blue
J3 Blue
J4 Yellow

Am I correct that J1 & J2 are the same .. and therefore should be
removed ... and removing J3 should also be done to prevent limiting of
output temperature

J4 remains as this is a standard short flue


...REMOVING
Jumper 1 limits the output to 52,000 btu's
Jumper 2 Increases the output to 100'000btu's
Jumper 3 limits the flow temp from 82°C to 63°C - optimum condensing
temp,thermal stores
Jumper 4 provides low gas rate ignition sequence, for long horizontal
and vertical flues

so 2 and 3 out in your case
If you are still having explosive ignition problems remove J4
Phone Baxi for confirmation



-

[rick]

On 10/11/2016 01:04, Mark wrote:


so 2 and 3 out in your case
If you are still having explosive ignition problems remove J4
Phone Baxi for confirmation

Mark .. thanks for comment - struggling to get to bottom of this ... in
original Manual it stated 1 & 2 should be removed as a pair to set to
1000,000 Btu/h and when used with a Thermal store.
Also read elsewhere that if you remove 1 & 2 .. its sets to 100.000Btu/h
and turns off modulation

Are you sure that I should have jumper 1 in place ?

Looks like Explosive ignition issue may now be resolved (earth wire
harness issue) so left 4 in


I found a later manual on-line:
http://www.freeboilermanuals.com/ass...c/100%20HE.pdf

page 22:
If the installation requires a greater output to
achieve the desired room temperature, this can be
increased to 31.18 kW (103,000 Btu/hr) and the
boiler can be adjusted as follows:
a) Draw the control PCB forwards out..
b) Remove all three jumpers.


If the boiler is to be used in conjunction with a
Thermal Store, the boiler can be adjusted as follows:
a) Draw the control PCB forwards out ..
b) Remove jumper 2

Just seems a bit odd ... remove 1,2 & 3 for 100,000Btu/h
But remove only J2 for thermal store

[rick]

On 10/11/2016 11:29, rick wrote:
On 10/11/2016 01:04, Mark wrote:


so 2 and 3 out in your case
If you are still having explosive ignition problems remove J4
Phone Baxi for confirmation

Mark .. thanks for comment - struggling to get to bottom of this ... in
original Manual it stated 1 & 2 should be removed as a pair to set to
1000,000 Btu/h and when used with a Thermal store.
Also read elsewhere that if you remove 1 & 2 .. its sets to 100.000Btu/h
and turns off modulation

Are you sure that I should have jumper 1 in place ?

Looks like Explosive ignition issue may now be resolved (earth wire
harness issue) so left 4 in




also found this on-line ... has even different recommendation:
http://www.diynot.com/diy/threads/ba...details.80740/

post#5 advises
set jumpers to: 1 in, 2 out, 3 in for Thermal stores

So far convinced 2 to and 4 in are correct, still unsure about 1 & 3

[rick]

On 09/11/2016 16:28, rick wrote:
Baxi Barcelona, which has been upgraded to 100He spec

On the original control board there were 2 jumpers ..
Both were removed as this boiler is connected to a thermal store

J1 to set to 100,000Btu/h
J2 to turn off modulation

New board has 4 jumpers
J1 Red
J2 Blue
J3 Blue
J4 Yellow



Finally found the official answer - got a Tech note from Baxi, may be of
use for others:





System up to 75,000 Btu/Hr Ji in J2 in J3 in

System up to 100,000 Btu/Hr J1 out J2 out J3 out

Thermal Store compatibility J1 in J2 out J3 in

J4 in for normal flue, out for long flue, and slow rate ignition

[Mark]

rick wrote:

Finally found the official answer - got a Tech note from Baxi, may be of
use for others:



System up to 75,000 Btu/Hr Ji in J2 in J3 in

System up to 100,000 Btu/Hr J1 out J2 out J3 out

Thermal Store compatibility J1 in J2 out J3 in



I admit i dont know much about thermal stores
but would have thought that it would be better to limit the flow temp to
63°C for optimum condensing temp
i.e J3 Out


-

[rick]

On 12/11/2016 00:09, Mark wrote:
rick wrote:

Finally found the official answer - got a Tech note from Baxi, may be of
use for others:



System up to 75,000 Btu/Hr Ji in J2 in J3 in

System up to 100,000 Btu/Hr J1 out J2 out J3 out

Thermal Store compatibility J1 in J2 out J3 in



I admit i dont know much about thermal stores
but would have thought that it would be better to limit the flow temp to
63°C for optimum condensing temp
i.e J3 Out



Trying to get 'best advice' not easy ... but the above at least is how
jumpers work.
The store is set to 60C currently can't be set higher due to Underfloor
Heating - I may fit a blending valve to allow store temp increase but
limit loop to 50C

NuHeat advised setting temp on flow to 75C to ensure fast enough
recovery time on HW in tank when fro exampling running a bath.