Special installation

. 10 Special installation For greater lengths, the installation must be made with a project previously approved by our technical service. Modifications to any of the following may be required for such a project: - Tube dimensions. - Refrigerant charge. - Suction traps. - Suction accumulator. - Liquid solenoid valve. In such cases, the maximum lengths which can be recommended are: Compact installation of the units The units are supplied prepared for cooling and electrical connections. To install the heat pumps as a compact unit, the outdoor BCVO and indoor BCVI units must be joined by using the holes in each unit and the screws supplied in a bag in the electrical box in the case of BCVO/I-60 and inside the indoor units of BCVI-20/25, 30/40 & 45. The BCVO and BCVI units are supplied with the refrigerant circuit connections ready for welding, and to be interconnected on the outside of the casing. The BCVO/I-20, 25, 30 and 40 have only one circuit. The BCV-45, 60 and 80 units have two circuits. The refrigerant load should be carried out at the jobsite. Charge procedure 1.- De-pressurise the units. 2.- Drain the refrigerant. 3.- Clean out with dry nitrogen. 4.- Solder the tubes, with a dry nitrogen flow inside the tubes. 5.- Use low melting-point rods with a minimum silver content of 5% for soldering. 6.- Fill with 2 kg R-22 refrigerant to detect leaks. 7.- Empty out the refrigerant. 8.- Clean out with dry nitrogen. 9.- Create a vacuum down to 200 microns. 10.- Put in the refrigerant, using scales or a calibrated cylinder. The charge accuracy should be of 30 grams. The outdoor unit is fitted with pressure and temperature points on the connection outlets, for checking of over-heating and sub-cooling. Check that these values are around