Thread: ASHP day!

Think that's very good that. Very reasonable and well worth it.

Originally Posted by Maddog1

Think that's very good that. Very reasonable and well worth it.

i'll see how it performs later in the year, but the intention is not to heat december to the end of march.
but if it starts to cost too much before then i'll drop the temperature down to a reasonable level before...

still currently at 19C - 20C
and what a difference the poly covers and ASHP combined are making!

i've been putting the covers on at night and taking them off during the day, for just over the last week
and seen a big drop in the ASHP kWh to just 8 kWh in the last week....thats only 24p a day on average!
admittedly the last few days i've only took the covers off from around 12ish to 6pm as the mornings have been cold still.

Hi Dave,

Haven't seen you on here in a while, Hope all is well and you enjoyed a good Christmas.

What size cable do you have supplying the sockets / spur your ASHP runs off?

The 17kw ASHP I've bought (buying) has a maximum input draw of 3.2kw.
I would also like to run a variable pump (200w max, but generally consuming 50-60w) permanently from the same feed.
And a 600w blower, only to be used when cleaning out the bead.

So that makes for a maximum draw of 4kw, despite being unrealistic that all 3 items would ever be used at the same time, but to be sure lets say absolute maximum of 4.1kw to be doubly certain.

The armoured cable I'll need will be no more than 22m long.

Can I get away with 2.5mm core for this?

I already have a 2.5mm supply to an outdoor socket that isn't used, so I could connect armoured cable to this.

If I need a 4mm supply, that's a hell of a lot more work required.

Most of the online calculators say 2.5mm2 would be adequate, but the odd one says 4mm2 would be required.

What do you think?

Originally Posted by john1

Frim is your man for elecs,have his mob no if you want it Steve.

Cheers John,

Hope you had a good Christmas mate.

Yeah I have his number, didn't want to bug him on "work related" stuff during the hols.

I'm in no rush, have a wall to build first to mount the ASHP on, which is a mammoth task as the wall needs to repalce the existing raised bed retaining wall (that supports backfill for the single skin pond wall) which is leaning badly. Trying to figure a way I can do it without having to empty the pond.

Another question for you Dave, or anybody else running a Thermotec.

There's a display option to "Clean" the ASHP.

Since mine has been operating pre-filter, I'd like to try the clean option, but don't know what it does or how it works. Nothing mentioned in the manual.

Any ideas?

Originally Posted by RS2OOO

Another question for you Dave, or anybody else running a Thermotec.

There's a display option to "Clean" the ASHP.

Since mine has been operating pre-filter, I'd like to try the clean option, but don't know what it does or how it works. Nothing mentioned in the manual.

Any ideas?

as all these ASHP units are designed for using with swimming pools and not koi ponds.
i would imagine the 'clean' cycle might be to heat the inverter coil over 55C to kill bacteria ect?

i wouldn't use mine without being filtered as weed and debris could get trapped in the heat exhanger.
I don't know if you could rig a reverse flow as it would be pushing the flow switch backwards.
but if you have isolation valves they are pretty easy to drain and flush as i did with mine when i was swapping my filters over.
so i didn't have pond water sitting and going stagnant in the pipework.

Further investigation, I think the "Clean" option is a mispelling of "Clear".

All it seems to do is delete the list of previous error codes!

You make a good point Dave about running unfiltered water through the ASHP. To connect my ASHP up post-filter was going to be a right ball ache and have pump lines running backwards and forwards over the same area, but it does seem daft in hindsight to run it pre-filter (although I do have a skimmer basket pre-ASHP).

I'll make it a winter project to re-do the pipework as I've decommissioned the shower for winter anyway and need to re-do the base as I built it unnecessarily high above the pond (had good reason at the time, but no longer needed).