Air Source Heat Pumps

richardc1983

Even colder tonight -12C they have suggest in yorkshire!!!

Swipe

That'll be a good test for your pump Rich. Do you leave it running overnight and just turn it down a bit?

richardc1983

Last night the system was turned off but flat mate complained his room was cold this morning... so tonight it will be turned down to 18C to keep the chill off.

We havent noticed any drop in performance at all yet, still running all the blowers at low fan speed... only difference is longer run times.

Its -3 here now and its only 1915 so tonight I think is going to be very cold indeed!

paceinternet

When your outside unit does a defrost cycle, do you feel any cooling effect at the indoor unit, or does it just not blow for 5 mins or so?

richardc1983

When the 4 way valve flicks over into "defrost mode" the unit effectively goes into cooling mode without the fan on.

It takes about 2 seconds for the coil sensor on the indoor unit to register that the coil has gone cold and then stop the fan.

A slight draft can be felt at this time, but after that the fan does not start to blow until the coil has gotten back upto at least 38C which can range from 3 - 6 minutes.

We have had 2 defrosts since 10am today... system is running a treat!

richardc1983

Swipe wrote: »

That'll be a good test for your pump Rich. Do you leave it running overnight and just turn it down a bit?

Well heres the proof that its still running fantastically!!! I know its not quite -12C but we have freezing fog here so humidity is up meaning its doing a defrost every couple of hours at 6minutes a time.

greendwarf

I know you're very impressed but at 2am?

richardc1983

Lol I'm a night owl I am up late and also work nights so that's early normally don't go to bed till 11am

1962cal

Hi.

I noticed this thread whilst searching on the internet.

I'm new to this forum. We had an 14.4Kw ecodan fitted in the summer. We have noticed over the past fortnight that our electricity usage has gone up to about 75 units a day! We run the system all the time to try and keep the house to a reasonable temperature, 15c at night and 18c during the day. Is anyone else experiencing this problem with their ASHP or is this just a fact of life? We moved from a life expired GCH system to ASHP with the existing rads.

The house is fully insulated, it had to be to get the grant! We pretty much turn most things off to save energy costs.

Any advice?

Carol

richardc1983

Yes thats correct in these temps it will be running and working harder you have to understand though how much your saving through summer on hot water and also the rest of winter when its milder... its normal.

Is it maintaining temperatures for you though?

Does the Ecodan have electrical back up heaters? maybe these are coming on? What do you have the flow temperature set at, you should only have it set at about 50-55C otherwise the heaters come on.