Hello,
I built a new house this year and installed a Vaillant Arotherm air source heat pump with Unitower, 11 kW. The entire house has underfloor heating, and each room is equipped with a Busch Jäger room thermostat with a rotary knob. My question is how exactly should the room thermostats be set, and how does the setting on the rotary knob relate to the temperature set on the Unitower?
Thanks in advance for the helpful information :-)
I built a new house this year and installed a Vaillant Arotherm air source heat pump with Unitower, 11 kW. The entire house has underfloor heating, and each room is equipped with a Busch Jäger room thermostat with a rotary knob. My question is how exactly should the room thermostats be set, and how does the setting on the rotary knob relate to the temperature set on the Unitower?
Thanks in advance for the helpful information :-)
C
chand198614 Nov 2018 08:28Maybe this will clear up your confusion: The heating system supplies all your rooms with the same warm water.
Your room thermostats can control the flow through the heating coils in each room by turning it on or off. The lower the number you set, the sooner it shuts off. Setting it to 6 means "always open."
Logically, this means it’s best to set your heating system as suggested by Mycraft in #10. Set everything to 6, then measure the temperature throughout after warming up. Ideally, 6 should give you the comfortable temperature in the warmest room (bathroom?). Then adjust the rest using the room thermostats.
If following this procedure the bathroom is too warm or too cold at setting 6, the heating system will need to be adjusted accordingly.
Does this help?
Your room thermostats can control the flow through the heating coils in each room by turning it on or off. The lower the number you set, the sooner it shuts off. Setting it to 6 means "always open."
Logically, this means it’s best to set your heating system as suggested by Mycraft in #10. Set everything to 6, then measure the temperature throughout after warming up. Ideally, 6 should give you the comfortable temperature in the warmest room (bathroom?). Then adjust the rest using the room thermostats.
If following this procedure the bathroom is too warm or too cold at setting 6, the heating system will need to be adjusted accordingly.
Does this help?
N
Nafets44414 Nov 2018 08:36Yes, that was explained very clearly, and I think I understand it now. This is how I will proceed! Thank you very much! :-)
Der-w schrieb:
If you ask around a bit, many even recommend completely disabling the room thermostats.That’s true, because with low-temperature heating systems like underfloor heating, they often don’t make much sense.
Nafets444 schrieb:
Then wouldn’t the whole house have the same temperature?Not exactly, the temperatures are similar but a difference of 3-4 degrees Celsius (5-7°F) remains, and for most people that’s sufficient.
N
Nafets44414 Nov 2018 09:09And how do you plan to handle the difference if everything runs for the same length of time everywhere?
C
chand198614 Nov 2018 09:21Nafets444 schrieb:
And how do you want to balance the difference if everything runs equally long everywhere?When planning the underfloor heating, adjust the spacing of the heating pipes. Closer spacing in the bathroom, wider spacing in the bedroom. This results in a warmer bathroom and a cooler bedroom without thermostats, with full flow in both rooms.
If it’s not planned that way, then use thermostats. But design the system so that as many thermostats as possible (in your case 6) can be set to “always open” (making them practically unnecessary).
R
readytorumble14 Nov 2018 09:23The installation spacing can no longer be changed, so we have to assume that it is acceptable.
What still needs adjustment now is the flow rate.
It seems you have not yet dealt with the hydraulic balancing.
This process adjusts the flow for each heating circuit or room.
The heating system supplies water at the same temperature to every room, but with different flow rates—delivering more equal-temperature water to the bathroom than to the bedrooms.
Ideally, this results in all thermostats being set to "heating" constantly, yet achieving different room temperatures.
Finding this optimal setting is very difficult and time-consuming. The emergency stop function of the room thermostats makes it easier to reach the desired temperatures, but it is not the most efficient method.
What still needs adjustment now is the flow rate.
It seems you have not yet dealt with the hydraulic balancing.
This process adjusts the flow for each heating circuit or room.
The heating system supplies water at the same temperature to every room, but with different flow rates—delivering more equal-temperature water to the bathroom than to the bedrooms.
Ideally, this results in all thermostats being set to "heating" constantly, yet achieving different room temperatures.
Finding this optimal setting is very difficult and time-consuming. The emergency stop function of the room thermostats makes it easier to reach the desired temperatures, but it is not the most efficient method.
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