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Prunus
@prunus
Member
Estimable Member
Joined: Apr 6, 2021
Last seen: Apr 8, 2026
Profile Activity
Topics: 5 / Replies: 68
AllTopicsReplies
Reply
RE: Debugging my legionella immersion heater

Well, if that's the right PDF the factory set is supposed to be 75 so in theory it should go up at least that far when cranked up to the max. A bit po...

1 month ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Debugging my legionella immersion heater

I suppose it could be that 57C is the maximum achievable temperature by the immersion heater, but I thought the point of the adjustment is you could s...

1 month ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Debugging my legionella immersion heater

I think we're talking at cross purposes here. The above test is with the ASHP completely turned off. The setup is mains -> power meter -> contac...

1 month ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Debugging my legionella immersion heater

Here is the full setup (I really should tidy that wiring...): Disconnected tank stat at the top pocket, thermistor going to the ASHP in the middle...

1 month ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Debugging my legionella immersion heater

Also to add, on the original Grant wiring there was a separate tank stat which is in the pocket at the top of the cylinder. I have disconnected this a...

1 month ago
Forum
Domestic Hot Water & Cylinders
Topic
Debugging my legionella immersion heater
1 month ago
Forum
Domestic Hot Water & Cylinders
Replies: 10
Views: 190
Reply
RE: Noisy Grant Aerona 3 13kW ASHP question

Hmm. When they say the pipes are in the walls, is this all the 22mm of PEX you showed upthread? Do you know where they all go? Roughly how long is the...

2 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Noisy Grant Aerona 3 13kW ASHP question

@heymikey OK, so that rules out a number of things. I would lean towards thinking you do actually have a flow restriction of some kind. If it's not ai...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Noisy Grant Aerona 3 13kW ASHP question

Hello @heymikey, I'm not Cally and I haven't read the whole of this thread, but I did have noise problems with my Grant before I rewired it. So just...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Buffers, hot water and cooling

Hmm, I need to have a crawl around and check the radiator piping but I think it's all one 22mm backbone with 15mm drops - a couple of drops serve two ...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Buffers, hot water and cooling

Some fair points... I've been doing some investigations. The system is balanced, in the sense of delivering heat evenly without cold spots. However ...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Buffers, hot water and cooling

Good spot, I'd missed that 'short circuit' path. Here's another go: If no V1/V2/V3 are powered (all NC position) then we're in classic buffer hea...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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