Isotherm 4201 ASU Magnum Instructions D'installation Et D'emploi page 6

INSTALLATION
Tools required:
In addition to the usual basic hand tools such as
screwdrivers, hammer, pliers, assortment of
drills, saw, tape measure etc. the following are required:
Small electrical drilling machine, a 30 mm (1¼")
hole saw, 21 and 24 mm fi xed spanners, crimping
pliers for electrical spade type cable connectors.
A suffi cient length of cables of suitable diameter
for connecting the compressor unit to the
battery and an assortment of screws to attach the various
components are also required.
General
First, decide where the various components are best
situated. Choose a suitable place for the compressor unit at
a pipe-run distance of less than 3 m (9½ ft) from the holding
plate in the refrigeration box. Try to fi nd a position that
requires only gentle, wide radius bends of the pipework. The
space intended for the compressor unit should preferably be
cool and large and able to be reached by the cables from the
battery.
The compressor unit together with its electronics is designed
to withstand a normal marine environment. It can be fi tted
in a splash-free position but should preferably be placed in
as dry surroundings as possible. Mount the compressor unit
in a horizontal position to allow it to achieve its maximum
permitted 30° angle of heel.
The holding plate position in the box should be planned with
consideration being taken to the partition, routing of piping,
etc. The unit may be fi tted in any desired position but must be
as high as possible in the box.
Fitting the holding plate
If the box to be used is already in place, inspect it to
establish the quality of its insulation, as this is an important
thermal effi ciency factor. The best insulation materials are
polyurethane foam; Bonocell or any other cross-linked
expanded polyurethane foam. A good rule-of-thumb is that
the thickness of this material should be 0.5 – 1 mm (1/32" −
3/64") per litre (1/4 gallon) of the box.
The holding plate can be placed in any position. It can be
fi tted vertically, horizontally, upright or hanging. Due to the
fact that cold air always falls downward the holding plate
should be placed as high up in the box as possible.
The 6 mm (¼") tinned copper pipe leading from the holding
plate can be easily bent allowing it to leave the box in any
direction.
The best position for the pipe to exit the box is behind the
holding plate in the space formed by the angle supports of
the holding plate. The pipe should be handled with care and
bent gradually to avoid creasing it. Form it around a suitable
cylindrical object if sharp bends are required.
Be particularly careful with the thin capillary tube and its
connection at the opposite end and don't loosen its two
locking turns around the thicker pipe. The pipes are pre-fi lled
with refrigerant and must not be cut.
Start installation by unrolling the pipe to its full extent.
Installation of the holding plate is easier if someone can
assist. One person can hold the plate and direct the pipe
through the side of the box while the other feeds the pipe
together with the two connections through the box wall,
bulkheads, etc. The holding plate can be screwed either onto
the wall or on the underside of the top if space is available. If
necessary, it may be easier to mount if openings are cut into
the holes in the two supports under the holding plate to suit
the diameter of the screws to be used.
5
These screws may than be fi tted into the box fi rst and the
holding plate "slotted" into place.
Drill the 30 mm (1¼") hole for the pipe and connections as
high as possible. This is where it is warmest should any
leakage of air occur.
Mount the temperature sensor cable together with the
connection pipe through the hole in the box wall. Fill the
hole surrounding the pipe and sensor cable with insulation
material. Any excess piping should be coiled in a suitable
position outside the box and securely fastened to avoid
vibrating.
Partition for adjusting box temperature – Fig. I
Cold air from the holding plate sinks down to the bottom
of the box. The box, therefore, needs a separate space to
enable part of it to be used as a freezer compartment. To
achieve best results this compartment should be no larger
than absolutely necessary. The partition should be a tight fi t
against the box sides and reach a height of approximately 5
cm (2") below the top edge of the holding plate.
It should be able to be adjusted vertically 0 – 2 mm (0
– 3/32") to create a gap at the bottom to allow a suitable
amount of cold air to fl ow from the freezer section into the
refrigeration section to maintain a temperature of + 4° to +
6°C (39 – 43°F). The partition should not be insulated, be
easy to clean and preferably made in transparent plexiglass.
Kylmagasin
Holding plate
Kältespeicher
Plaque réfrégerante
Mellanvägg
Partition
Zwischenwand
Cloison
Fig. I