Rivacold RDF Serie Mode D'emploi Et D'entretien page 16

4. 1 Thermostatic valve mounting (not supplied)
Connect the outlet of the thermostatic valve to the distributor, which is already fitted with a
coupling to be flanged, as shown in Draw. 3.2 Part. A.
Fit the external equaliser pipe, which must be welded to the thermostatic valve and near to the
end of the evaporator manifold, in the position shown in Draw. 3.2 Part. B. Position the thermostatic
valve bulb on the suction manifold so that it is just before the external equaliser pipe. Fix it into
place on the top section of the suction pipe, using the metal clip (Draw. 3.2 Part. C). Weld a
suitably bent pipe (Draw. 3.2 Part D) to the thermostatic valve inlet. The pipe will then be
connected to the refrigerating system liquid pipes.
Drawing 3.1
4. 2 Positioning on the ceiling
Once the thermostatic valve is connected, fix the unit cooler to the cold room ceiling.
The unit has to be installed in horizontal position, by means of the proper fixing slots. The fixing
distances between centers and the position of the fans relating to the cold room walls is shown in
Drawing 1. Keep around the unit enough space for a good air cycling and for a maintenance
operation in safe conditions.
The minimum distance from the wall is of 700mm (Drawing 1). Keep enough space (previously and
subsequently to the evaporator) for an easy replacement of the thermostatic valve and for fitting or
replacing the electrical defrosting heaters (if it is not possible to have enough space on the heater
side provide an opening through the cold room wall by means of a demounting panel ).
5. REFRIGERATING CONNECTION
A siphon must be inserted on the evaporator outlet (bottom pipe) (Fig. 3.1), and this must be welded
to the suction pipe of the cooling system.
Connect the pipe that was previously soldered to the inlet side of the thermostatic valve to the liquid
piping of the refrigerating system.
In order to guarantee a good hermetic seal and reduce break risks, execute all the joints by means
of a " bell type" welding . If the pipe diameter do not allow that , use proper soldering joints .
During the pipe connection procedure pay attention not to force or modify the position of the header
as this may a cause of breaks.
6. CONDENSATE DRAIN CONNECTION
The piping for condensation water drainage is to be connected to a 20 mm male coupling (for
models with 1 or 2 fans with a diameter of ø250) or to a 33 mm coupling (for all other RDF models)
on the electrical/refrigeration connection side (the minimum slope must be greater than 20%).
Provide on the cold room wall, next to the unit cooler, for a hole through which the pipe will come
out leading to a siphon trap. Seal the hole by means of silicon (the features of which will be suitable
to the cold room use) in order to avoid infiltration of warm air. In case of a low temperature cold
room the draining line must to be heated during defrosting time by means of a silicon heater
(optional) of about 100W placed inside it .
Drawing 3.2
B
A
C
D
RDF Pag. 16
UK
REV.07 03_19