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RobS
@robs
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Estimable Member
Joined: Oct 15, 2024
Last seen: May 2, 2025
Profile Activity
Topics: 0 / Replies: 52
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RE: Solar for heating DHW

Most batteries are what is known as DC-coupled, which means that they use the solar inverter to convert their DC voltage to AC used in your house. So ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan with FTC7 controller DHW schedule

Cosy has the 3 hours of peak rate and the day rate is appropriately 1.5p per hour more - which is appropriately equivalent to another hour and a half ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan with FTC7 controller DHW schedule

142L is not very big but if you don't use much DHW then it's worth seeing if only one DHW reheat a day works. Do you have a battery with your solar...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan with FTC7 controller DHW schedule

We also have a FTC7 and a newer R290 Mitsubishi heat pump. There are prohibits for heating and DHW, to schedule the DHW you want to prohibit the DHW f...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Mixing of pipework/components' with different internal dimensions - theory vs reality/practical approach

I would suggest: Mag filter last on return so it filters out stuff before it gets to the outside unit. Do you also have a strainer in you system? ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: The Definitive Guide to Weather Compensation and Curves for Air Source Heat Pumps

I don't know if the FTC6 and FTC7 are different in this respect but the FTC7 rounds up and down as you would expect (no odd .38 and .53 rounding point...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: From Auto adapt to W/C Ecodan

@westkent Almost, the wireless controller just becomes a limiter, if the internal temperature goes 1C above the set temperature then the heat pump w...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: From Auto adapt to W/C Ecodan

When on WC the WC curve controls the heating based on the outside temperature. You can use schedules for DHW (hot water) though. What are you trying t...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Best control strategies for heat pumps that are way oversized

A few Mitsubishi figures from their data book for comparison... 5kW output at 12C OAT: 5kW unit is COP of 6.15 11.2kW unit is COP of 5.9 ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Samsung Gen7 setup

To quantify the greater pressure drop of your corrugated pipe you could try using an online calculator like For example, at 20 l/min a 25.4mm corrug...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Minimum ASHP outputs?

Yes, your figures correlate well with your heat pump having a minimum output of about 3kW at these outside temperatures. Have you tried your heat pump...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Minimum ASHP outputs?

You have clearly found your system's sweet spot! Yes, radiator based systems are likely to be limited in stable low flow temperatures. But larg...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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