Forums

Forums
Members
trebor12345
Activity
 
Notifications
Clear all
trebor12345
trebor12345
@trebor12345
Member
Reputable Member
Joined: Feb 26, 2024
Last seen: Jan 11, 2026
Profile Activity
Topics: 8 / Replies: 105
AllTopicsReplies
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

I am drawing the same conclusion that this system for some reason switches off for 3 minutes then 8 minutes latter does it's de-ice cycle. It does th...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

8 room thermostats are all in Frost Protection mode. The one in the family room controls the heating. All the manifold actuators have been removed. ...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

Your calculation of 13W per sqm fits well with what I found at 14W. So if I require 14W/m2 and the floor area is 179m. 179x14 = 2505. Does that m...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

From the Full SAP Report: Space heating requirements: 8314 Kwh/year I can see the U values for all of the structure, but don’t understand the fina...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

I done some checking with chatgpt and yes its 7 KW output with an input of approx 2KW, thank you for correcting this. So at 20W/m2 and 200sq/m that'...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

Is that 7KW input or output. If 7KW input that's way oversized. I have attached an image of the name plate on the heat pump, for confirmation. I ha...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

Thank you for the clarification on how the de-ice cycle works. Regarding the question on flow rates across the heat exchanger. I have this split sy...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

I have been making some adjustments to the heating and would like to clarify a point. If you are having short cycling issues, is it best to slow the...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Questions on my Hitachi Yutaki SCombi Heat Pump

@jamespa Thank you for the reply. That clarifies things. I hadn't read the starters guide, but will do now. It's a 2 port buffer. When zero or b...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Questions on my Hitachi Yutaki SCombi Heat Pump
9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 3
Views: 1119
Reply
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

Thank you, that helped in my understanding. I believe this Hitachi split system takes water from the buffer tank/underfloor to defrost the evaporator...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Page 8 / 10
Share:

Join Us!

Worth Watching

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security
This Site Is Protected By
ShieldPRO →