Refrigerating Connection - CombiSteel 7480 Serie Mode D'emploi

N.B. For an optimal use of the Evaporating unit it is advisable to connect it with an condensing unit, asking
the distributor for the exact corresponding model. If a condensing unit of a different brand or model is
installed, the installer has to check if its technical characteristics are in accordance with the dimensioning
foreseen by the manufacturer of the Evaporating unit; that should not be the case, it is possible to execute
the necessary changes only after having consulted the manufacturer.
If the unit is installed in a cold room set indoors, make sure that the room is good aired.
N.B. Make sure that the wall and the ceiling, on which the unit has to be fixed, can bear the weight indicated
in the relative table (tab. 1).
N.B. Remember that any time you have to move the unit, you have to lift it up and never push or drag it.

Lamp holder of the cold room light: Open the lamp holder by loosening the screws (fig. 2-11) , make holes
in the points indicated (fig. 2-12), then with the screws provided or another suitable system fix the bottom
of the lamp holder to the cold room wall (fig. 2-13) and near enough to the unit (maximum distance 1,5 m),
so that it would not be necessary to lengthen the corresponding cable. After having connected the cable
(see paragraph "ELECTRIC CONNECTION"), screw in the lamp and close the lamp holder again.

Remote control panel: Open the board by loosening the screws that are in the corners or on the front side
flanks (fig. 2-14). On some remote control panel models it is necessary to make holes in the little round
hollows which are on the bottom of the box near the corners (fig. 2-15) and whose centre coincides with
the centre of the bearing feet on the back. Fix the panel in a correct way (self-tapping screws, expansive
inserts, etc.) using the present or just made holes (fig. 2-16); on some models caps are provided to close the
fixing hollows (fig. 2-17). Make the eventual electric connections (see paragraph "ELECTRIC CONNECTION")
and close the panel again.

REFRIGERATING CONNECTION

The refrigeration connection has to be executed by skilled workers who have the necessary technical
qualifications established by the Country where the unit is installed.
To execute this connection, which is necessary on the Split and Bi Block models, you have to use the pipes
provided with the units or those suggested in the relative table (tab. 2).
Usually the pipe installation is executed first of all positioning them and then connecting the unions provided
with victualic couplings.
During the positioning of the suction pipe, remember that it has to lean lightly towards the compressor (fig. 3-
1). In case there are rising tracts, it is necessary to make one or more syphons (fig. 3-2) before the vertical tract
in order to make the return of the oil to the compressor easy; it is very important that the syphons have not too
marked curvatures or sinks, especially when the section of the pipe is very large (fig. 3-3). As regards the liquid
delivery pipe you have not to follow particular rules except for the beauty and the functionality; for this reason
this pipe is normally put beside the suction pipe, certainly without making any syphons (fig. 3-3). Both pipes have
to be fixed to the wall near the bends and on the straight tracts every 1,5 - 2 meters (fig. 3-4).
When the pipe positioning has been finished, the unions have to be joined. During this operation make sure that
the connecting pipe is perfectly perpendicular to the surface on which the fixed union is fastened; in any case
before tightening firmly the union, make sure that the screw thread has entered correctly. In case the union is a
flange to be welded, remove the movable part of the union and then weld it with the pipe. Fix the two union
parts again by interposing the gasket. In the Bi Block models, when the pipe connection has been finished, you
have to create the vacuum in them and in the evaporator (the compressor- condenser- liquid receiver group is
already under gas pressure); after having done this, the outlet shut-off valves of the liquid receiver and the
suction shut-off valves of the compressor can be turned on, putting in this way the whole system under pressure.
When the unit has been already set in motion, control if it would be necessary to fill up the system with gas or
oil.
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