
Last seen: Jul 29, 2025
Hitachi Yutaki SCombi Heat Pump(Indoor Unit ) RWD-3.0RW1E-220S-K(Outdoor Unit) RAS-3WHVRP1 2024 build bungalow200m2High level of insulationUnderfloo...
@robs On the 5. 10kW Viessmann Vitocal in Sheffield. What is causing the heat pump to turn off and on every hour (approx). It it a room thermostat o...
Thanks for your help.
I have no idea, to me there is no logic. There is no information on-line about this Hitachi system, so a bit of a loss.
The heat generated in the 5 minute period is with the pump on which goes to the manifold and floor. My de-ice cycle is exactly as yours.
In the 5 minute period the compressor is running, taking electrical power and producing heat. This, what Hitachi call a "Thermal Off" I might call a ...
The first dip is the thermal off period where the compressor stops for 3 minutes and the refrigerant in the pipe from the heat pump to the internal un...
The fan does turn off, water from inside is then pumped in reverse, power is take to heat the water and then the fan and compressor runs. Takes about...
@editor I just wanted to know other owners thoughts and experience of this system. I am having issues with short cycles and getting steady flow tempe...
- 26 Forums
- 2,117 Topics
- 46.5 K Posts
- 46 Online
- 4,521 Members
Join Us!
Latest Posts
-
RE: Replacing Refrigerant on Mitsubishi Heat Pump
So this is essentially an AC split with a hydro box whi...
By ASHP-BOBBA , 8 hours ago
-
RE: Compressor and Evaporator Stratification
@trebor12345 So I think the 1st zigzag section shows so...
By ASHP-BOBBA , 12 hours ago
-
I think @editor and @ashp-bobba are being very polite a...
By Majordennisbloodnok , 14 hours ago
-
RE: Is this just haze or something more?
@majordennisbloodnok I was giving a talk to primary sch...
By Toodles , 16 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 , 17 hours ago
-
Indeed. With a battery its presumably the battery con...
By JamesPa , 21 hours 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 , 4 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