Grant Aerona circulation/system pump staying on
@mikefl Parameter 41 22 is 30 so presume that's 30 mins which the pump seems to be ignoring.
The other oddity is the outdoor temperature at which the system pump switches off which varies from 5.5C to 7.5C, so it doesn't seem to be following parameters 43 11 & 12 (we've altered those as a test but it makes no difference).
And the sensor still reckons outdoor temp can increase 1.5C in seven minutes which maybe points to it being the issue.
Busy time for installers and engineers so we'll have to wait patiently until someone comes 😐
Hopes it’s ok to jump onto to this conversation, I have found it really useful but have a further question.
The circulation pump in my system have been on for the past few days due to colder weather…. The issue I have is that it is rather noisy.
Could it be a case of air in the DHW system? The noise stops when the heating kicks in.
If so… any ideas on how to bleed the DHW system?
Thanks in advance.
Posted by: @richwThe circulation pump in my system have been on for the past few days due to colder weather…. The issue I have is that it is rather noisy
Hi @richw, there should be manual bleed valves on your piping or Low Loss Header/Volumiser if fitted. (Items 10 and 11 on diagram) If you don't have a low loss header (item 8) then check what circulation path is open to the pump inside the Grant Aerona when it is running in frost protection. Check it's not pumping against closed 2 or 3 port valves when CH and DHW are and causing the bypass valve to lift & open, Grant pre-plumb cylinders have an automatic bypass valve (Item 6) across the primary flow and return pipe connections, designed to prevent primary flow becoming excessively low, it's noisy when it lifts and operates. It shouldn't normally operate. It's these subtle details such as the internal pump switching on for frost protection that seem to go overlooked by Grant system installers.
@richw Is the frost protection symbol on (on the control panel) when you hear the noise?
We get the noise but not the frost protection symbol.
And more bizarre with the control panel as it increased outdoor temp by 5C before our eyes.
Mystery solved. Grant says it can happen where the system pump sticks on and it's not to do with frost protection. Doing reset on the pump stops the issue.
My pump stays on 24/7, as it's the only pump in the system and I don't ever turn my heating off.
Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.
My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.
@sentinam hi, did resetting really solve the issue. It hasn't for me...The exact same thing is happening to my grant heat pump for the last 2 weeks. The water circulation pump is running for long periods (i.e. no frost protection symbol) when the frost protection turns off and again starts up in the evening several hours prior to the frost protection kicking in?
Really would be interested to know I you got this issue sorted.
Cheers.
- 21 Forums
- 1,985 Topics
- 43.3 K Posts
- 34 Online
- 2,311 Members
Join Us!
Heat Pump Dramas?
Thinking about installing a heat pump but unsure where to start? Already have one but it’s not performing as expected? Or are you locked in a frustrating dispute with an installer or manufacturer? We’re here to help.
✅ Pre-Installation Planning
✅ Post-Installation Troubleshooting
✅ Performance Optimisation
✅ Complaint Support (Manufacturer & Installer)
Latest Posts
-
Dont worry about this. Long story and discussion but d...
By JamesPa , 1 hour ago
-
@eliuccio I was wondering how things are going with t...
By JamesPa , 2 hours ago
-
RE: Database of heat pump performance data?
You could try/p> BUT i spent ages on it before real...
By Judith , 2 hours ago
-
😆 I would have been tempted to see how good the...
By Mars , 12 hours ago
-
RE: Volumisers in Heat Pump Systems: Does Placement Matter?
No not auto adapt running hotter at cheaper times coole...
By Gary , 13 hours ago
-
RE: Ecodan Auto Adapt Questions
Hi @richard24738 we weren’t happy with our FTC Contr...
By SUNandAIR , 13 hours ago
-
RE: To relocate or add extra PV panels..advice required
You can't forecast the annual generation by simple extr...
By JohnR , 13 hours ago
-
@toodles whilst I agree with toodles the actions he de...
By Potatoman , 13 hours ago
-
RE: Plug and play solar. Thoughts?
They are 'exporting to the grid' within the EREC defini...
By Transparent , 15 hours ago
-
RE: Are MCS are finally improving (some of) their guidelines?
@johnr I think OE argue that the lower running costs as...
By Toodles , 15 hours ago
-
RE: Additional Battery v Wind Turbine v Ripple
@lucia Yes, that is the response to which I referred ea...
By Toodles , 17 hours ago
-
RE: Is it worth siting panels on an East facing roof?
Yes. Thanks all. I have used the guides and have found ...
By Carpenterstation , 1 day ago
-
RE: The EPC Dilemma: How Current Ratings Fail Heat Pumps
I've commented earlier in this thread, finding the same...
By Mike Patrick , 2 days ago
-
RE: SolarPV tables / online calculator
This guy did a good analysis in summary go down a...
By Judith , 2 days ago
-
RE: ASHP Ecodan L9 error - No Heating but Hot Water
@dnagre delayed reply! It worked again for a bit but ha...
By Phoenix15 , 2 days ago
-
RE: Vaillant Arotherm Plus - new build no heating, no radiator
@john1756 did you ever get to the bottom of this?
By Mars , 2 days ago
-
RE: Aira Heat Pump: Stylish Scandinavian Heating
We tested the away mode for the first time as we were a...
By ChandyKris , 2 days ago
-
RE: Confused about Samsung Gen6 Hot Water Controller
Found a copy on this really good website 🤣 ...
By DerekDeLeon , 2 days ago
-
RE: Smart TRV experiences (ideally integrating with Midea heat pump)
@madbilly - I think you may risk over-complicating this...
By cathodeRay , 2 days ago
Latest Topics
-
Plug and play solar. Thoughts?
By Lucia 3 days ago
-
By JamesPa 3 days ago
-
Vaillant water pressure gauge vs Analogue gauge
By jeegnesh 3 days ago
-
Database of heat pump performance data?
By madbilly 4 days ago
-
By madbilly 4 days ago
-
Confused about Samsung Gen6 Hot Water Controller
By ntruby 4 days ago
-
help with new bathroom and towel radiator
By AdamK 5 days ago