Isotherm 3701 ASU Bedienungs- Und Einbaueinleitung Seite 16

It should be able to be adjusted vertically from
0-6 mm (0-1/4") 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 +4-6°C (39-43°F).
The dividing partition should not be insulated, be
easy to clean and preferably made of transparent
plexiglass.
Compressor unit
The compressor unit should be fi tted on the
"Click-on"-bracket in a horizontal position in a
suitable place such as a cupboard, wardrobe,
stowage compartment, etc. The unit can also
be mounted onto a suitable bulkhead, under the
side decks or any other place where no valuable
stowage space will be lost. If it is positioned in
a stowage place, a guard may be required for
protection.
The unit will operate continuously at angles of
up to approx. 30° and should therefore be fi tted
horizontally across the beam of sailing boats
so as not to exceed this at full angle of heal.
Screw the bracket carefully to the bedding, either
horizontal or vertical. Open the lockings by pulling
them aside and lift them up slightly. They will
then stay in open position. Lower the compressor
to the bracket. The rubber feet shall enter the
pins. Push the compressor down a little and the
lockings will enter locked position. Check that the
compressor is safely locked.
Installation can often be simplifi ed if the quick-
coupling connections on the piping and the
compressor are screwed up tight before the
compressor unit is fi nally put down in position. Do
not remove the protective caps until immediately
before this is about to be done and save them
for possible future use. The quick-coupling
connections can be turned by hand for the
fi rst few threads before continuing tightening
steadily and quickly with a spanner so that the
connections enters its sealing position and the
valves open. While doing this, it is important
that the male part of the connection stationary
is held with a 21 mm spanner so that it does not
rotate and damage the thin capillary tube (see
Fig. D). Tighten the couplings up hard. Use fi xed
spanners 21 and 24 mm for the pipe fi ttings.
Control panel
The control panel should be positioned where
it can be seen easily and within reach of the 4
meter cable from the electronic control box on the
compressor. The housing can be mounted using
the accompanying long screws. A 12 mm Ø hole
should be drilled for the cable.
The panel can also be let into its surrounding by
removing the plastic housing and attaching it with
the accompanying screws.
Electrical wiring
Run a positive lead from the plus (+) terminal of
the battery or the battery main switch across the
accompanying fuse holder (Fig. F) and a negative
lead from the negative (-) battery terminal.
For a 12 Volt system, the minimum area of the
cable from the battery to compressor must be:
2.5 mm² if the length is less than 2.5 meter;
4 mm² if up to 4 meter; and 6 mm² if up to 6
meter.
USA wire size: 12 gauge for 10 ft and under
and 10 gauge for lengths over 10 ft.
These areas can be halved for a 24-volt system.
Connect these cables to their correct tab-
type terminals on the control unit. A battery
charger must never be connected directly to
the refrigeration system without having a battery
connected in parallel.
A spark occurs when the power leads are
connected. This is because the control unit
(which consumes only 16 mA in its closed circuit
condition) contains a capacitor, which is then
charged.
Connect the two modular plugs in the front of
the control unit with the control panel cable
plug connected to the lower larger one and the
temperature sensor to the upper connector.
(See Fig. G)
Fasten all electrical cables carefully, away from
metal equipment.
Test run
Set the switch to "NORMAL.AUTO". The green
light goes on immediately and the yellow one
shortly after indicating that the compressor is
running. Shortly after, a slight hissing sound can
be heard from the holding plate, which after 15-30
minutes will show signs of moisture or frost.
Start the engine. Within 2-10 minutes (depending
on condition of the batteries and alternator) the
yellow light will go out, the red one lights when the
voltage comes above 13.2 volt.
When the engine is stopped, the voltage in the
electrical system drops. Within a few minutes,
the yellow light comes on, the red goes out. If
the holding plate has reached its full refrigeration
capacity, however, the compressor will stop
instead. There is always a 30 second delay before
the electronic monitoring system takes over.
Finally, check that the electrical wiring and pipe
work are safe and securely fastened.