Air Source Heat Pumps

deano72_2

Might be telling you to suck eggs
Have you checked the dip switches on the dan?

I take it it's an ftc2,if so check dip switch to run in cop ( can't remember which one it is of top my head, may be sw2-7) , ifs not set to cop then it will try to heat more rapidly,eg with the dan at full pelt or by means of immersion.

It don't make sense that after a reset it will heat up to your target temp (which assuming is 55c) using HP only

It may be even a software issue.
What software version is it running? You can find out by doing the below
1,hold test button until displays 190
2,press circ water
That will then display software version something like 300 or 401 or 500
If it's version 300 or 401 sw3 5 should be off
If it's version 500 sw3 5 should on

The latest one I know of Virsionn 802


As a matter interest if u goto the dan you can see the last 3 error codes
Error1
Sw2
1 off
2 on
3 on
4 off
5 off
6 off

Error 2
1 on
2 on
3 on
4 on
5 off
6 off

Error 3 (oldest)
1 off
2 off
3 off
4 on
5 off
6 on

It's worth a punt as the dan might see it but the FTC May not necessary see it

bootneck02

Hi I am new to all this. I am retired and living in Housing Association one bedroom bungalow and obviously I am on a limited budget. We do not have a gas supply in our area and at the moment we are heated with very old night store heaters and hot water by emersion heater. The housing Association is proposing to install Mitsubishi Ecodan system with the solar panel to heat the immersion heater during the day. This is a voluntary thing in that we can keep on the present night store heaters or we convert to the new system. What is the advice of the contributors to this community. and most importantly will I save money on my electricity bill as well as having efficient heating system. We do have cavity wall insulation and just have had the roof insulation toped up last year.

Cardew

The savings on your electricity bill from the solar panels could be in the region of £100 to £150 a year, depending on how many panels fit on the roof.


A properly working Mitsubishi Ecodan(one of the better heat pumps) should be a better heating system and cheaper to run.


You obviously will need to change your electricity tariff from Economy 7.


You will also need to understand how to operate a heat pump - essentially you leave it running constantly in winter, and 'set back the temperature at night.


With the Housing Association responsible for any problems with the heat pump, IMO it is a 'no-brainer'.

matelodave

I agree with Cardew if you are getting it all installed for free, the HA will be responsible for maintenance and you'll get some free leccy as well. I'd jump at the chance

You will have to learn how it works though, as Cardew says a heatpump is better running at low level virtually continuously with the temperature set back by 3-4 degrees overnight. You should find that it's a lot more comfortable than storage heaters which are hot in the mornings and cold by evening times.

Make sure you change your tariff from E7 because you'll be using electricity during the daytime and evening so you want it as cheaply as possible during those times. Although you'll get some benefit from your solar panels they generate most when you need it least (in the summer) and generate least when you need it most (in the winter).

I've got a heatpump and I would only swap it for mains gas - set up and used properly they should save you money over the cost of night storage heaters.

rupertdog

I have a four bed house which i was told i needed a 8.5 kw pump.
they installed a 14 kw and said the running costs are the same is this true

lovesgshp

Why did they tell you a 8.5kw unit and then instal one nearly twice the size? A 14Kw will use more electricity.

richardc1983

The 14kw unit should ramp down as they are Inverter driven and will ramp down to match output required. Sometimes they are oversized to allow for cold extremes of temp.

albyota

lovesgshp wrote: »

Why did they tell you a 8.5kw unit and then instal one nearly twice the size? A 14Kw will use more electricity.

Not strictly true, the ecodans are inverter driven, so can deliver just the right amount of heat required if set up properly, eg, my 8.5kW Ecodan will work harder in the depth of our coldest winters delivering 5 to 6 kWs.
if your house only needs 7 kWs for example the 14kW will reduce its power down to this, but will be able to output 11kWs at minus 15.

lovesgshp

A heatpump should never be oversized, it is meant to be operated at peak efficiency levels.
Albyota, we don't even know the make of the pump the poster has. The Ecodan is only built for the UK, as far as I can see, so hope he can supply more info.

richardc1983

I echo Albyota's comments above