Nilan reserves the right to alter these instructions without prior notice Page 6 af 25Condensation drain / water sealThe Comfort unit is delivered with a 20mm condensation drain. (PVC, GF-fittings). The drain isplaced under the discharge. The condensation drain should be carried with an even inclination of at least 1cm permetre, frost-proof to the nearest outlet. The overflow from the safety valve should also becarried to the nearest outlet. To avoid frost problems it can be necessary to supply the condensation drain with aheating cable. It is the plumbers’ responsibility to secure the drain. (See Accessories)When the system is running, there can be a vacuum of up to 500Pa (corresponding to 50mm watercolumn) in the outlet. For this reason, the difference in height in the water seal must be minimum50mm.The water seal can dry out and avoid the water from running out of the unit. Therefore the waterseal should be tested regularly and refilled with water if necessary. An elevated height of the waterseal will reduce the need for refilling with water.min. 112,5mmmin. 50mm.min. 50mm.Ø20mm drainComfortCondensation drain / water seal The water seal should be tested as described below. (the unit must be connected to theducting and the front door should be closed):