Coldroom conversion r22 to r404a

[tonashp]

I am going ahead with a total refit. New blowers, pipework, cond unit, danfoss controller.

I am fitting a twin fan searle tec6 which weighs just under 20kg. I have been told I would be ok just to use self tappers to the roof. I think it would be better with 4x m12 drop rods to make sure it wont go anywhere. I have got an idea what to do but not sure what other parts I need for the rods??

[Rob White]

I am going ahead with a total refit. New blowers, pipework, cond unit, danfoss controller.

I am fitting a twin fan searle tec6 which weighs just under 20kg. I have been told I would be ok just to use self tappers to the roof. I think it would be better with 4x m12 drop rods to make sure it wont go anywhere. I have got an idea what to do but not sure what other parts I need for the rods??

20kg is nothing for the roof but too much to use self tappers.
All the wholesalers sell plastic rod and all the fittings needed
to use them. basically for such a small weight, all you would
need to do is put the holes through and then use the plastic
rod with the washers that you should get with it.

If you need to spread the weight of the evaps back to the wall
then unistrut cut to the correct size will do that, but at 20kg
I would just bolt straight through and use washers above.

If you have already chosen the refrigerant, so be it but for
future proofing the system I would consider other ones to 404a.

R404a will become a very expensive refrigerant in the future and
there are alternatives on the market that would replace it.

The EU are going to put a green tax onto refrigerants and it
will be liked to the GWP, 404a is quite high and will be hit
by any tax imposed on it.

See

http://www.acr-news.com/news/news.asp?id=3084

Rob

.