ᐅ How to Properly Adjust an Air-to-Water Heat Pump with Underfloor Heating

Created on: 15 Dec 2019 16:52

Hello,
I have been searching around and reading the manual for my Elco air-to-water heat pump, but I haven’t fully figured it out yet...

I have a manifold on the ground floor and first floor; the recommendation is to fully open everything, set all thermostats to maximum, and then adjust the heating curve on the heat pump low enough to roughly achieve the desired temperature.
Is that more or less correct?

At the moment, every thermostat (except bathroom/bedroom) is set to 20°C (68°F), and the temperature in each room is about 20.9°C (70°F) (bathroom slightly warmer, bedroom slightly cooler).
However, I’m surprised by the high electricity consumption — it has been 800 kWh in just 2 months.

135 m² (1455 sq ft) living area
Elco Split 7 kW
Circulation pump not yet connected

Thanks in advance
M4rvin

Daniel-Sp17 Dec 2019 12:48

#19

Unfortunately, I am not an expert, just an interested amateur...

Mycraft17 Dec 2019 12:56

#20

There are several excellent ready-made guides available. Simply type "hydraulic balancing" into your web search.

M4rvin17 Dec 2019 13:08

#21

I finally found the key for my manifold...

To me, it looks like these are already fully open?

Here’s the current status from the control panel:
Supply zone 1+2
Set temperature: “0”
Temperature curve set to “0.6” (I have now adjusted it to 0.4)

Comfort temperature: 21
Reduced temperature: 17

Domestic hot water setpoint: 50
Hot water storage: 54
Comfort: 50
Reduced: 42

I can’t find more values; the menu is also very confusingly arranged.

Manifold with six red control valves and scales on a copper pipe, tangled cables above.

Five flow meters with red adjusters on a pipe manifold, supply/return.

KingSong17 Dec 2019 13:46

#22

You need to take photos of your flow regulators while the heat pump is running... otherwise, they will simply show "0."

Also, get rid of your night setback; it doesn’t make any sense with a heat pump and won’t save you anything.

M4rvin17 Dec 2019 14:15

#23

Ah ok... so this red ring basically moves down and indicates the flow rate?

Night setback refers to the "reduced" values for heating and hot water, right?

I looked up hydraulic balancing, and apparently it is mandatory according to the Energy Saving Ordinance/building regulations and must be carried out by a heating specialist?

Mycraft17 Dec 2019 14:23

#24

Yes, of course, this is part of the responsibilities of the heating installer. However, this is where the difference between good and poor workmanship becomes evident, and a roughly adjusted system is more common than an accurately calibrated one.

ᐅ How to Properly Adjust an Air-to-Water Heat Pump with Underfloor Heating

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