Potatoman

Hi, thank you for your reply, to try and answer your questions, The problem I have got is the installer has left me with wiser controls and has told me that these controls will work when in ASHP mode or 3rd party boiler mode, but they don't, the wiser controls do switch the heat pump off and on but when in 3rd party mode do not switch off the oil boiler, so consequently the house gets too warm. Now I know wiser controls are not the best for ASHP but my problem at the moment is to get the 3rd party boiler working correctly and the reason to have a 3rd party boiler is heat pumps are less efficient at minus temperatures.

Thank you for all the interesting replies, can we talk generically, if you wanted to set up a ASHP e.g. LG and a 3rd party boiler to work as they should do how would you set up the heating controls so it maintained a temperature of 21 degrees in the house if you had the choice of WC or Wiser controls, and how would everything work together, Thanks

Hi, the ASHP is an LG 9KW monobloc, all radiator system, the system was left by the installer with Drayton wiser smart radiator valves controlling the heat pump, fixed flow rate, but now all rad valves are set at 23 degrees and weather compensation is operating. The 3rd party boiler is a Worcester 18 /25 oil boiler connected to the ASHP via a cable. As I understand it, when the outside temperature drops below 5 degrees C, which is set via the heat pump controls, the heat pump stops working and sends an electrical signal to the oil boiler to fire up, but when this happens what will control the temperature in the rooms if the heat pump is switched off

Hi, could anybody tell me what controls the temperature of the rooms in the house when the 3rd party boiler is selected on the heat pump. Thanks.

Hi, has anybody got a step-by-step installation guide to connect my Shelly energy meter to cloud/ phone. Thanks

Can anybody tell me if this calculation holds water. Heat loss calculation of my house is 5.8Kw at -2 for 21 degrees inside. So to raise the temperature of my house I require 252w/degree 5800 divided by temp difference 23 So if you take average outside temp - average inside temp 0-21 =21 21 x 252 = 5292w 5.3kW x 24 = 127 kWhr/day divided by the actual kWHr used, in this case 41 kWHr would this give a COP of 3.097 ?

Hi, is there a calculation you can make to determine the daily COP of a system. Thanks

That's great, Thanks

Hi, can anybody tell me what the flow rate from my 9kw LG ASHP should be given a 5.8 KW heat loss and using glycol, thanks

Hi, how do I measure the HP's internal circulating pump at max heat output so I can balance the two pumps, Thanks

Hi, what is the best setting to have your heat pump, post buffer tank circulating pump flow rate set to.

Hi, does anybody know a good way to balance radiators on a heat pump system

Hi, is anybody on Octopus Cosy tariff without a battery system in-place and if so do you find the running costs are any cheaper than a std rate tariff

Thanks for that.

With what has been said about low noise mode, would that help efficiency, as my Heat pump is well oversized.