Haier R290 Monobloc

[JohnMo]

So took delivery of the 4kW Haier ASHP today. So far first impressions are very good. Consists of an outdoor unit, complete with expansion vessel and pressure relief valve, inside the monobloc.

 

Inside the packaging is also a controller and indoor wiring unit. So can return the one I thought I had to buy. So total cost is £2100 delivered to the door from Wolesely.

 

Photos to follow with full install story

[JohnMo]

Some photos 

Indoor wiring centre with controller installed (no wiring installed).

Simple install screened cable to outside unit and power.

 

Cover on and wing complete, all metal casing and very heavy duty. No sharp edges. 

 

Outdoor unit, for a 4kW unit it's pretty big, the condenser and fan are very big compared to the Maxa unit currently installed which is a 6kW.

 

[JohnMo]

Just need some warmer weather to allow old heat pump to be removed and this one installed.

 

Have had to add antifreeze valves, part of the warranty conditions. Have got Inta Zero ones that reference water temperature not air temperature. Brand new half price bargain from eBay.

 

 

[ProDave]

Following with interest.

 

One of the things that bugs me about heat pumps, is there is no standard for how you wire them.  Mine, an LG needs a LOT of individual connections to the heat pump itself.  It looks like with yours all those connections go to this indoor box presumably connected to the outside unit with a simple cable.

 

It makes swapping from one heat pump to a different make a lot more complicated.

[SimonD]

Be interesting to see how you get on. I've been keepng an eye on Haier since Graham Hendra went to work there. That's a very good price and surprising the controls come with it as the brochures says controls are sold separate.

 

One question/comment is that the expansion tanks seem quite small at 4.5 & 8l? Is this correct and what does the technical documentation say about system volumes with those?

Edited 3 hours ago by SimonD

[JohnMo]

7 minutes ago, SimonD said:

That's a very good price and surprising the controls come with it as the brochures says controls are sold separate.

Yes and Wolesely don't tell you any different. They want a restocking fee to take it back.

 

8 minutes ago, SimonD said:

One question/comment is that the expansion tanks seem quite small at 4.5 & 8l? Is this correct and what does the technical documentation say about system volumes with those?

They do sound small, I keeping my 50L volumiser in system so will retain the existing expansion vessel in circuit.

[Beelbeebub]

Holy crap! Is that wiring center also the controller ie the outdoor unit has no brains at all and it's all inside?  That seems like a lot of relays, chips and the like just to connect the various valves, pumps and thermostats.l!

[JohnMo]

There is the inverter controller outside but I think the indoor wiring centre controls most things

 

The relay is for cylinder immersion control. You can drive a couple of secondary pumps, mixer valve, 3 port valve etc. plus lots more.

[JohnMo]

40 minutes ago, SimonD said:

One question/comment is that the expansion tanks seem quite small at 4.5 & 8l? Is this correct and what does the technical documentation say about system volumes with those

Didn't answer fully before

[Iceverge]

Why the change from your 6kW unit?

[JohnMo]

4 minutes ago, Iceverge said:

Why the change from your 6kW unit?

It's minimum modulation is near 4kW, house demand is only 3.5kW max.

 

Normal run of things I wouldn't change it, but we have just bought a wooden hot tub, so will repurpose the old unit to heating the hot tub, instead of the normal wood fired heater.

 

So get a heat pump more appropriate to the house demand. Should make a decent dent in running costs, with better CoP in summer and winter, for very little money.

[Iceverge]

You could just have put the MVHR on summer bypass! 

 

 

 

[JohnMo]

22 minutes ago, Iceverge said:

You could just have put the MVHR on summer bypass! 

 

 

 

Nope not enough cooling effect. UFH in cooling mode leads to a nice house