Cooler Connection; Tests And Inspection - Olimpia splendid UNICO TWIN Instrucciones Para La Instalación, Uso Y Mantenimiento

2.2.7

Cooler connection

Open the casing on the side for access to the connectors (fig. 33).
IMPORTANT: Do not make the connections using normal hydraulic pipes that could contain residues of flashing, dirt or
water and that could damage the parts inside the unit and interfere with proper operation.
Use only special copper pipes for cooling, that are supplied clean and sealed at the ends.
After cutting the proper lengths, seal the ends immediately on the roll and cut piece.
Pipes for refrigeration with preinsulation can also be used.
Only use pipes with the a diameter suitable for the dimensions described in the technical data sheets.
- Plan the route of the pipeline so as to reduce the length and number of bends as much as possible for best performance of
the system. The maximum length of the lines connecting the outside unit to the inside unit is 10 m in both directions.
- maximum height different between two units +/- 5 m.
- Fasten a cable raceway to the wall (possibly with internal partitioning) of suitable size for the pipes and electric wires to pass
through.
- Cut the sections of pipe leaving an extra 3-4 cm on the ends.
IMPORTANT: use a wheel pipe cutter only to cut the pipes (fig. 34) clamping it in short lengths so as not to crush the pipe.
NEVER USE A NORMAL HANDSAW,
scraps could fall inside the pipe and enter the circuitry of the system, damaging the parts severely (fig. 35 A).
- Remove possible burrs with the special tool.
IMPORTANT: immediately after cutting and deburring the pipes, seal the ends with insulating tape.
If you do not use preinsulated pipes, they must be insulated as follows:
- material: polyurethane foam with closed cells
- max. coefficient of transmission : 0,45 W/ (Kxm
- minimum thickness: 6 mm (for liquid pipes)
- minimum thickness: 9 mm (for gas pipes)
Do not place both pipes in the same sheath, as this would jeopardize the proper operation of the system (fig. 35 B).
- Bind any joints in the sheath securely with insulating tape.
- Before flaring the pipe ends, insert the fastening nut (fig. 36 A).
- Flare the pipe ends using the special tool. Take care not to break, crack or split the pipe (fig. 36 B).
- Lubricate the connecting thread with oil for coolant (DO NOT USE ANY OTHER TYPE OF LUBRICANT).
- Screw the pipe nut manually on the connecting thread.
- Tighten using a wrench to hold the threaded part of the connector, so as to avoid twisting the pipe, and a
dynamometric wrench on the nut (fig. 37) calibrated with the following values depending on the size of the pipe:
- 14-18 Nxm (1.4-1.8 kgxm) for pipe diameter ø 6-6.4 mm
- 33-40 Nxm (3.3-4.0 kgxm) for pipe diameter ø 9.5-10 mm
- 50-60 Nxm (5.0-6.0 kgxm) for pipe diameter ø 12-12.7 mm.
ATTENTION:
- Look in the documentation for an adhesive sheet with 2 labels. Detach the bottom label (fig. 38) and stick it near the charge
and/or restore point.
- Clearly note the amount of coolant loaded on the coolant label using indelible ink.
- In the box marked 1, write the quantity of gas established in the technical data (kg).
- Remove the transparent label that is left on the upper part of the adhesive sheet and stick it on top of the label previously
affixed close to the filling point.
- Do not let the fluorinated gas escape.
- Make sure that the fluorinated gas is never released into the atmosphere during installation, maintenance and disposal.
- Should a gas leak occur, it must be identified and rectified as soon as possible.
- Only qualified personnel shout carry out maintenance of this product.
- Any use of fluorinated gas in this product, for example during the movement by hand of the product or the recharging of the
gas, must be in accordance with regulation CE 842/2006 "on determined fluorinated greenhouse gasses and any local laws
in force".
- Additional charging is not required at the installation stage.
- Do not exceed the charge indicated on the rating plate.
2.2.8

Tests and inspection

After making all pipe connections, check the seal of the system:
- Unscrew the closing cap on the service coupling of the gas line (fig. 39 ref. A).
- Connect a tank of anhydrous nitrogen to the coupling with a 5/16" connector and a pressure reducer.
- Open the tap on the tank and pressure reducer and bring the pressure in the circuit to 3 bar; close the tank.
) or 0.39 kcal/(hxCxm )
2 2
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UNICO TWIN