Forums

Forums
Renewable Heating
Air Source Heat Pum...
Hot water issues wi...
 
Notifications
Clear all

Hot water issues with Mitsubishi puhz-hw140v

 
Air Source Heat Pumps (ASHPs)
Last Post by Giav 1 year ago
1 Posts
1 Users
1 Reactions
776 Views
RSS
 Giav
(@giav)
New Member Member
Joined: 1 year ago
Posts: 1
Topic starter 14/01/2024 5:32 pm  

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.

 

 

 

 

 

 

 


   
👍
1
Quote
Forum Jump:
  Previous Topic
Next Topic  

Currently viewing this topic 1 guest.

Share:

Join Us!

Login   Register

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

👉 Find your installer now!

Latest Posts