Old Danfoss control box - is there a replacement?

[DustyM]

Gents,

I have a customer with an old Beta 2 oil boiler that has an Inter 2011 burner fitted. I need a new control box for this burner but cannot find a replacement for the Danfoss BHO21 that is currently fitted. HWOS seem to think it's a BHO74 but can't confirm at present due to things being a bit hectic with them. Has anyone replaced one of these control boxes? If so, then with what?

Cheers

 

[WHPES]

Not personally but I've come across a few with TF830.3 controllers that have been fitted.

 

[Best]

I googled it & the Danfoss conversion tables say the BHO 74 is the correct replacement for the BHO 21.

 

[Roger Welton]

rewire with satronic box, really easy, base, box, p/cell and lead required takes 30 mins tops.

 

[kimbo]

I googled it & the Danfoss conversion tables say the BHO 74 is the correct replacement for the BHO 21.

According to my danfoss service book it says the loa 44 is the replacement

 

[Best]

According to my danfoss service book it says the loa 44 is the replacement

Yes, I also read that it is the LOA 44 on another Danfoss table. Not sure what I am reading, - perhaps old info? That's the trouble with looking stuff up on the Internet! :smile:

 

[lame plumber]

According to my danfoss service book it says the loa 44 is the replacement

wrong table, reading wrong way loa44 to bho omho try table on page 70 ie your looking to replace danfoss with danfoss, the other table is to replace landis n staffa with danfoss

 

[kimbo]

wrong table, reading wrong way loa44 to bho omho try table on page 70 ie your looking to replace danfoss with danfoss, the other table is to replace landis n staffa with danfoss

No definetly got it right page 71 is landis and staeffa to danfoss, page 70 column 1 is old danfoss to be converted to col 4 new replacement loa 44

 

[lame plumber]

why would a danfoss website reccommend replacing their kit with a different make? Have a look here p70/71

http://danfoss-randall.co.uk/PCMPDF/DKBDPS000A412.pdf

 

[Best]

Is it not that either replacement is correct? LOA 44 will be latest replacement.
Landis are same as Danfoss?

 

[kimbo]

I suspect that they are one and the same made by danfoss the loa is a later control box to the 64. If you check out the part number it is the same part numbers as used for the danfoss boxes.
Some boiler manufacturers use the loa instead of the bho because the timing sequences are different in both boxes and might suit one type of boiler

 

[kimbo]

why would a danfoss website reccommend replacing their kit with a different make? Have a look here p70/71

http://danfoss-randall.co.uk/PCMPDF/DKBDPS000A412.pdf

That is a newer book than mine I must send off for a new one.

 

[lame plumber]

That is a newer book than mine I must send off for a new one.

was starting to think i was going senile, (this isnt an opening for dancin), coz now I know im not