Nibe S1156 PC - HaustechnikDialog

Nibe S1156 PC
Verfasser: D866	Zeit: 07.04.2026 17:02:49 0 3948442
Hello, Apologies for posting in Engish, I am looking to purchase a Nibe S1156 8kW heat pump. My ground loop is three 250m loops of 40mm da pipe and two flow and return pipes 50m length 63mm da. Both PE100 RC. They are laid in straight runs in trenches. The seller of the heat pump has said that the PC version is not suitable for ground collectors only for boreholes? Is this correct? Thank you
Verfasser: D866	Zeit: 08.04.2026 09:49:33 0 3948553
Hallo, Entschuldigung für die Veröffentlichung in Engish, ich möchte eine Nibe S1156 8kW Wärmepumpe kaufen. Meine Erdungsschleife besteht aus drei 250 m Schleifen mit 40 mm da Rohren und zwei Durchfluss- und Rücklaufrohren mit einer Länge von 50 m und einer Länge von 63 mm. Beide PE100 RC. Sie werden in geraden Läufen in Gräben verlegt. Der Verkäufer der Wärmepumpe hat gesagt, dass die PC-Version nicht für Bodenkollektoren geeignet ist, sondern nur für Bohrlöcher? Ist das richtig? Danke
Verfasser: guste100	Zeit: 08.04.2026 10:11:55 0 3948562
The "PC" Version includes the "passive cooling". Ground collectors will typically have warmer temperatures during sommer, compared to bore hole collectors. Thus the amount of available cooling (especially towards the end of the summer period) is limited. That's why Nibe is not recommending the PC version with ground collectors. Where will your installation be based (region) and which depths are you planning to install the ground collector?
Verfasser: D866	Zeit: 08.04.2026 14:47:04 0 3948628
It is in the west of Ireland and will be approximately 1.4 meters.
Verfasser: hbrockmann	Zeit: 08.04.2026 15:08:41 0 3948633
many people use nibe xxxx pc with ground collectors: https://www.waermepumpen-verbrauchsdatenbank.de/index.php?button=karte# search for "grabenkollektor" and typ " pc"
Verfasser: guste100	Zeit: 09.04.2026 16:31:21 0 3948814
Zitat von D866 It is in the west of Ireland and will be approximately 1.4 meters. Alright, I've to admit that I've no clue about the ground temperatures in Ireland compared to northern Germany. But AI says the average temperatures are similar if not even lower in the summer in northern Ireland. Thus the passive cooling should still work okay-ish even though you plan with "only" 1.4m depth. The cooling effect towards the end of the summer will be limited / low though. Based on AI temperature statements for Ireland, I wonder: Will you need passive cooling at all?