Hot water issues with Mitsubishi puhz-hw140v
Hi, I've been having complaints that the hot water in the afternoon is not as hot as it was.
Having avoided looking too closely at the system for the past 11 years, I think it's time to investigate the settings.
The ashp is a Mitsubishi puhz-hw140v with a Danfoss controller and wireless thermostat, the controller
is old school, not computerized.
I'm not quite sure why the package avoided using the timing functions on the Mitsubishi controller.
Since I changed the TP4000 default factory setting for condensing gas boilers, apart from the occasional
failure of the wireless link, all has been ok otherwise.
The house is rated at E, area 154m2 with total heating and hot water requirement estimate of 34,230 kwh.
Location is in the southern part of Bucks, not so far from High Wycombe.
Annual electricity consumption is around 10,000 kwh, of which I would think 60% is for heating.
Originally I've had some trouble with the pressure on the dhw system, and issues with the pressure vessels
loosing air, I had to fix these myself as the installer is no longer available and our plumbers don't want to
know. The main issue I can see is that the ASHP has developed a list of around 6 degrees due to
settlement around the wet end.
I would love to hear any recommendations regarding maintenance & servicing.
- 22 Forums
- 2,073 Topics
- 45.5 K Posts
- 80 Online
- 3,353 Members
Join Us!
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
RE: Solar Power Output – Let’s Compare Generation Figures
Well we finished this month with an all time record! Ev...
By Andris , 2 hours ago
-
RE: 5 Star Service from Havenwise
Oh good! I was wondering when/if you might pick them ...
By Transparent , 4 hours ago
-
RE: Air Changes per Hour - ACH and the MCS requirement
update - my old installer insisted on a heat loss of 11...
By MatWin , 5 hours ago
-
I agree it's not very helpful. Generally, the max heat ...
By Old_Scientist , 7 hours ago
-
RE: Commencing on an ASHP Installation Process
I think therein lies the problem. Ratio of quotes to i...
By JamesPa , 1 day ago
-
RE: Why Your MCS-Certified Installer Might Not Be As Competent As You Think
Hive and most other smart thermostats don't play well w...
By JamesPa , 1 day ago
-
RE: Enabling WiFi: Samsung ASHP on Smart Things App
Thanks for the input. I've been running various experim...
By Grahamh-uk , 1 day ago
-
RE: Radiators downstairs are cooler at the bottom after ASHP install
@melonbuffet Hi, this sounds great is you are getting 5...
By ASHP-BOBBA , 1 day ago
-
RE: Ripped Off: How UK Homeowners Are Paying Gas Prices for Wind Energy
I believe there's another reason that network upgrades ...
By Transparent , 2 days ago
-
RE: What’s the modern take on advised types of insulation?
@jeff I am sorry @jeff if I have misunderstood what you...
By Toodles , 2 days ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
@editor Cobbler’s Mantra that!
By Toodles , 2 days ago
-
RE: Renewables & Heat Pumps in the News
Australia Blue, the first wind farm in Western Victoria...
By Morgan , 3 days ago
-
RE: Flow rate discrepancy between ASHP and manifold
That's useful thanks, I hadn't seen that table before. ...
By AshRolls , 4 days ago
-
In principle I agree, @johnmo, but with provisos. The...
By Majordennisbloodnok , 4 days ago
-
RE: Heat pump installation and BUS Grant timings
@jamespa Thats how I understood it too. 🙂
By ASHP-BOBBA , 4 days ago
-
RE: Antifreeze top up for my heat pump - is this a rip off?
@sallyl That sounds about right if they are re-filling ...
By Brendon Uys , 4 days ago
-
I wouldn't be so sure about that. Heat pump designers ...
By JamesPa , 5 days ago
-
RE: Jokes and fun posts about heat pumps and renewables
@toodles they're a rowdy bunch!
By Mars , 5 days ago
-
RE: Home energy storage & battery register
@jamespa To a certain extent, by exporting to the grid ...
By Toodles , 6 days ago