Installation 3.4.2 Handling Once the packaging has been removed, the indoor unit can be handled manually since it is not very heavy. a a Handling operations may potentially cause personal injuries or damages to the appliance or to the surrounding area. Identify the risky area and check that it is free of people or objects during lifting operations. Observe the maximum weight that can be lifted per person. – List the device only from points (1) indicated in the picture to avoid damaging the panelling. 3.4.3 Hanging the indoor unit – Position the template (1) supplied on the wall. – Drill the holes (2) for fastening the metal bracket (3), supplied with the kit, required for hanging the unit to the wall. 2 1 3 1 1 Fig. 39 Fig. 38 – Fasten the bracket (3) using the screws and plugs (4) with the aid of a spirit level. – Lift the unit and attach it to the bracket. 4 3 Fig. 40 – Remove the protective film. 26 / EN

Hydraulic and refrigerant connections 4. Hydraulic and refrigerant connections 4.1 Installing the cooling system i Reduce the length of the piping to a minimum. The length of the refrigerant pipes influences the performances and the unit’s energy efficiency. The rated efficiency is tested on the unit, the pipes of which are 7,5 metres long. Length of the cooling system 4.1.1 Cutting the pipes i The points where joints are made on-site and located in indoor environments must be tested for tightness. The test method must have a sensitivity of at least 5 g/year of refrigerant at a pressure not inferior to 25% of the maximum pressure allowed by the system (refer to the data plate). In addition, no leak must be detected. – Use a pipe cutter to cut the pipe to a length slightly higher than the distance between the units. The cut must be made at a 90° angle. 90° 1 2 3 H H A A 1 Oblique 2 Irregular 3 Undulated i i Fig. 42 Do not damage, tighten or deform the pipe during cutting. This would considerably reduce the unit’s efficiency. Damages to the unit caused by leaks from the connecting pipe joints are not covered by warranty. NIMBUS EXT R32 35 S - 50 S - 80 S - 80 S-T Fig. 41 Description Value UM Minimum length of pipes 5 m Maximum length of pipes with 20 m standard charge (A) Maximum length of pipes with 30 m additional charge Maximum height difference between the indoor unit and the outdoor unit (positive and negative) (H) 10 m 4.1.2 Eliminating burrs – Keeping the pipe (1) inclined downwards and remove all the burrs from the cut section of the pipe using a reamer (2) or other similar tool. 1 2 Fig. 43 NIMBUS EXT R32 120 S - 120 S-T - 150 S - 150 S-T Description Value UM Minimum length of pipes 5 m Maximum length of pipes with 15 m standard charge (A) Maximum length of pipes with 30 m additional charge Maximum height difference between the indoor unit and the outdoor unit (positive and negative) (H) 20 m 27 / EN

Installation 3.4.2 Handling Once the packaging has been removed, the indoor unit can be handled manually since it is not very heavy. a a Handling operations may potentially cause personal injuries or damages to the appliance or to the surrounding area. Identify the risky area and check that it is free of people or objects during lifting operations. Observe the maximum weight that can be lifted per person. – List the device only from points (1) indicated in the picture to avoid damaging the panelling. 3.4.3 Hanging the indoor unit – Position the template (1) supplied on the wall. – Drill the holes (2) for fastening the metal bracket (3), supplied with the kit, required for hanging the unit to the wall. 2 1 3 1 1 Fig. 39 Fig. 38 – Fasten the bracket (3) using the screws and plugs (4) with the aid of a spirit level. – Lift the unit and attach it to the bracket. 4 3 Fig. 40 – Remove the protective film. 26 / EN

Hydraulic and refrigerant connections 4. Hydraulic and refrigerant connections 4.1 Installing the cooling system i Reduce the length of the piping to a minimum. The length of the refrigerant pipes influences the performances and the unit’s energy efficiency. The rated efficiency is tested on the unit, the pipes of which are 7,5 metres long. Length of the cooling system 4.1.1 Cutting the pipes i The points where joints are made on-site and located in indoor environments must be tested for tightness. The test method must have a sensitivity of at least 5 g/year of refrigerant at a pressure not inferior to 25% of the maximum pressure allowed by the system (refer to the data plate). In addition, no leak must be detected. – Use a pipe cutter to cut the pipe to a length slightly higher than the distance between the units. The cut must be made at a 90° angle. 90° 1 2 3 H H A A 1 Oblique 2 Irregular 3 Undulated i i Fig. 42 Do not damage, tighten or deform the pipe during cutting. This would considerably reduce the unit’s efficiency. Damages to the unit caused by leaks from the connecting pipe joints are not covered by warranty. NIMBUS EXT R32 35 S - 50 S - 80 S - 80 S-T Fig. 41 Description Value UM Minimum length of pipes 5 m Maximum length of pipes with 20 m standard charge (A) Maximum length of pipes with 30 m additional charge Maximum height difference between the indoor unit and the outdoor unit (positive and negative) (H) 10 m 4.1.2 Eliminating burrs – Keeping the pipe (1) inclined downwards and remove all the burrs from the cut section of the pipe using a reamer (2) or other similar tool. 1 2 Fig. 43 NIMBUS EXT R32 120 S - 120 S-T - 150 S - 150 S-T Description Value UM Minimum length of pipes 5 m Maximum length of pipes with 15 m standard charge (A) Maximum length of pipes with 30 m additional charge Maximum height difference between the indoor unit and the outdoor unit (positive and negative) (H) 20 m 27 / EN