General informationIntroductionGeneral information prior to installationThe following documents are supplied with the unit:• Installation instructions/Software instructions• User manual• Wiring diagramThe instructions can be downloaded from the Nilan website: http://www.nilan.dk/da-dk/forside/downloadIf you have further questions on unit installation after reading the instructions, contact your nearestNilan distributor, who can be found on www.nilan.dk/forhandlere.The purpose of these instructions is to give the installer advice on correct installation and maintenanceof the unit.The unit must be started up immediately after installation and connection to the duct system. Inperiods where the ventilation system is not in operation, humid air from the rooms may penetrate intothe ducts and form a condensate. The condensate may leak out of the valves and damage furniture andfloors. In addition, condensate may form inside the unit, damaging the unit's electronics and fans.The unit is supplied fully tested and ready for operation.Unit typeProduct descriptionCompact P GEO is a ventilation unit with an integral heat exchanger that also produces hot water fordomestic use as well as central heating via an ground source heat pump.Compact P is designed for air flows of up to 275 m3/h at 100 Pa external counter-pressure. Compact PXL can handle air flows up to 430 m3/h at 100 Pa external counter-pressure.The ventilation part draws the humid, vitiated air out of the dwelling via the bathroom, WC, kitchen andutility room and introduces fresh air into the habitable rooms, i.e. living room, bedrooms and office. Thecould outdoor air is heated up in the heat exchanger (heat recovery) by the warm extract air.In addition to a (counterflow) heat exchanger, Compact P has an integral heat pump. The heat pumpuses the heat remaining in the extracted air following heat recovery in the heat exchanger to producehot water. In case of high hot water consumption, there is a 1.5 kW electric supplement heater in thehot water tank, which can also be used to heat the water.In the winter, the heat pump can be used to heat the supply air during periods in which not domestic hotwater is being produced. The supply air can be heated up to 34 ºC.As it is a reversible heat pump, it can be used in summer to cool the supply air. Compact P is able to coolthe supply air by up to 10 ºC. However, it will not function as an air conditioning unit, as it operates witha relatively low air change rate. Cooling of the supply air removes humidity from the indoor air,providing good comfort for persons in the dwelling, even if the indoor temperature is high. Compact P isable both to provide cooling and produce domestic hot water, so it could be said that the cooling of thesupply air is "free of charge".6