Haier R290 Monobloc

[JohnMo]

Forgot to mention DHW, this was to be by immersion only. Have rethought this, as all the hardware and cables are in place, to switch the 3 port valve. But gone a much simpler layout than previously. Immersion is standalone and not connected to heat pump at all. Any issues with heat pump, just flick immersion on.

 

Routing was always difficult to sensor probe from heat pump to cylinder but that has been solved by repurposing a cable or two not in use, that running through the house. But includes the cable I was going to use for the smart grid switching. One problem solved, one created.

[JohnMo]

Decided after all to stay simple, DHW by immersion, will have plenty of excess solar in summer that will not be generated due to export limits. So better to use it via immersion than loose it.

 

So wiring is complete. Have retained the smart grid switching to allow flow temp boost if I need it for the summer house, have retained the open source monitor system (energy and performance monitoring). So wiring actually done by me, power cable, SG switching 2 core cable, which then connects to inside house via existing trenched SWA cable (already in place for existing HP), this connects to UFH controller, so I have remote (hardwired) manual temp over-ride for summer house temperature. 

 

Once outdoor unit in place it's just power cables and shielded comms cable. A some basic pipe work mods.

 

Image below left to right, isolation switch wiring center and performing), electric meter for heat pump, heat meter for heat pump, Hiaer controller, below that, simple wiring center, then the main control/wiring center for Hiaer heat pump.

 

[JohnMo]

So will be keeping the volumiser, it's in the return line, but after the diverter valve due to because retrofit. So it also had an ESBE diverter, which allowed the volumiser to be bypassed during the production. That bypass isn't needed, so actuator removed and all the insulation tidied up.

 

Before

After

 

Not perfect but much better than it was.

 

Still a filling/flushing valve to sort out, but in the difficult basket 

 

[JohnMo]

Been scratching my head how to set WC curves, one for heating the other for cooling, however I found because the unit was set to auto (auto switching between heat and cool) the menu wasn't visible. However switch to heat or cool and WC menu pop up. Very easy to set, so set a flat curve for cooling 16 deg (well above dew point) flow temp and heating the more normal curve.

 

Will most likely need some adjustment once up and running.