Ecodan high pressure at 3 bar
We have a Mitsubishi Ecodan with UFH downstairs and radiators upstairs. The pressure at the water tank is 3 bar.
I have lowered this by bleeding water from the radiators to 2 bar as indicated by the fixed red marker on the pressure gauge.
This has gone back up to 3 bar and there is water coming from all the radiator bleed valves when opened so no air in them it seems.
We have had 2 new towel rails replacing cheap old ones. Not sure if this has anything to do with it.
Any advice on how I can resolve this issue and what might be causing it?
Andy
Something similar happened to me once with a gas system boiler. The filling loop hadn't been closed properly and it was pushing up the pressure over time. You might want to check that.
Posted by: @dorkyparkThe filling loop hadn't been closed properly and it was pushing up the pressure over time. You might want to check that.
That's a good reason to disconnect the filling loop when not in use, in the way that it is designed for!
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
Hi thanks for that, I'm not sure if I'm correct but I seem to remember having to open a valve to add pressure to the system. Would this be the valve that you mean? It was fully open and I've now closed it.
Yes, you would need to reduce the pressure to the correct value for your system (usually 1 to 1.5 bar when cold).
And as @jamespa says, disconnecting the filling loop when not used is the correct thing to do.
@sand I far as I am aware, all systems have two of these valves (one on each side of the mains feed to the red tank; these should both be shut off after any adjustment to pressure. (I may be wrong but all systems I have come across have the two valves and plumbers have told me they should both be shut after adjustments are complete.) Nervously, Toodles.
Toodles, he heats his home with cold draughts and cooks his food with magnets.
Posted by: @toodles@sand I far as I am aware, all systems have two of these valves (one on each side of the mains feed to the red tank; these should both be shut off after any adjustment to pressure. (I may be wrong but all systems I have come across have the two valves and plumbers have told me they should both be shut after adjustments are complete.) Nervously, Toodles.
You are correct, but they also come with thumb-turn fittings so they can be disconnected easily. On mine at least its necessary to do this to be sure that the shut off valve is truly shut off.
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
Currently viewing this topic 2 guests.
- 26 Forums
- 2,117 Topics
- 46.5 K Posts
- 53 Online
- 4,521 Members
Latest Posts
-
RE: Replacing Refrigerant on Mitsubishi Heat Pump
So this is essentially an AC split with a hydro box whi...
By ASHP-BOBBA , 11 hours ago
-
RE: Compressor and Evaporator Stratification
@trebor12345 So I think the 1st zigzag section shows so...
By ASHP-BOBBA , 14 hours ago
-
I think @editor and @ashp-bobba are being very polite a...
By Majordennisbloodnok , 16 hours ago
-
RE: Is this just haze or something more?
@majordennisbloodnok I was giving a talk to primary sch...
By Toodles , 18 hours ago
-
RE: Tesla Powerwall – More of a ‘Luxury’ Than an ROI Winner!
We had our Tesla Powerwall 3 (and Gateway) installed ea...
By Old_Scientist , 19 hours ago
-
Indeed. With a battery its presumably the battery con...
By JamesPa , 1 day ago
-
RE: No-code, plug-and-play monitoring for your heat pump
To update an ESP device using ESPHome in Home Assistant...
By Grantmethestrength , 2 days ago
-
RE: Benefits of an extra horizontal loop for GSHP
It will improve performance, but by how much depends on...
By Brendon Uys , 4 days ago
-
RE: The good, the bad and the not that great – my heat pump installation
Said I would pop back with a update. Only Mr Jesus h...
By Burtis , 4 days ago
-
RE: Buffers, hot water and cooling
Thats presumably heat pump DT, what about radiator DT a...
By JamesPa , 5 days ago
-
RE: Who's your electricity provider and what's your tariff?
@chandykris Exactly the same here. We now have 13.5kWh ...
By Old_Scientist , 5 days ago
-
RE: Wood burner with ASHP - direct air?
This depends on the size of your wood burner and size/t...
By Lucia , 6 days ago
-
RE: Difficult positioning of air source heat pump
@rikiarn It's a not a buffer it's a volumiser which is ...
By Lucia , 6 days ago
-
RE: Is your heat pump insured?
To make things clear, lots of insurance companies cover...
By Lucia , 6 days ago
-
RE: Boxt Heat Pump Installation Experience
@adrian any updates since installation? How is it perfo...
By Ashfp , 6 days ago
-
RE: Say hello and introduce yourself
Hi @seatonian - Yes, I know Seaton, and I have the Nat...
By Transparent , 7 days ago
-
@seatonian got your email. Will connect you with a reco...
By Mars , 1 week ago
-
@downfield and @toddles, this isn’t in the settings cur...
By Mars , 1 week ago
-
RE: Homely launched for Grant Aerona ASHP control
I haven't bought the Aerona Smart Controller (£700!) bu...
By Prunus , 1 week ago
-
RE: Antifreeze top up for my heat pump - is this a rip off?
For the record, Grant supply ethylene glycol for their ...
By Prunus , 1 week ago