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trebor12345
trebor12345
@trebor12345
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Estimable Member
Joined: Feb 26, 2024
Last seen: Dec 2, 2025
Topics: 8 / Replies: 90
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

@jamespa The heat pump sits on a level concrete plinth. There is a black Acro drain against the wall, but being a level plinth its not effective. ...

5 days ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

@jamespa Yes water from the HP does tend to collect under the unit. There is a drain but its not effective. I will send a picture later. The no...

5 days ago
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RE: Hitachi Yutaki SCombi Heat Pump - Owners

@sim0n0 It would be very useful if you could tell us more about your experience.

5 days ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

JamesPa I know these surveys are not the most accurate. From the Energy Performance Report From the Energy Survey   The building...

5 days ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

From the Display and my temp probes. HP is in start up, been on for about 30 mins. Left: Twi. Middle: Two. Right: Return from underfloor

5 days ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

@jamespa I have not been in that area before, not my area of comfort, (don't like playing in case I break something. Will have a look.

5 days ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

Heating only just going on today (4:30pm), been off since last night (my intervention as we are too hot). Outside it's 13C here. Only reason for putt...

5 days ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

I have been writing down the temperatures on the probes on top of the buffer. High Point just prior to Defrost Cycle Two - 28.8C (significant drop...

5 days ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

  Twi (Temperature Water In) is Hitachi's term for water returning to the Heat Exchanger. Remember, my temperature sensor are not metal probe...

5 days ago
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RE: Replacing my 18 month old Hitachi Yutaki ASHP

This is the manifold. Zoom in to see actuators are removed.

5 days ago
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