Operation; Temperature Setting Asu - Isotherm CR 42 Installation Et Mode D'emploi

2. Operation

The refrigerators are available in two versions, stand-
ard with mechanical thermostat and optionally in ASU
version.
CR 42 and CR INOX cannot be equipped with ASU.
Temperature regulation for both systems are described
separately below.
The refrigerators are made for use at ambient temper-
atures between 0°C/32°F and +45°C/113°F.
2.1 Temperature regulation thermostat
The refrigerator is fi tted with a manually operated
thermostat. This is turned clockwise to reduce
temperature and anti-clockwise to both increase
temperature and activate the on-off switch at the end
position, 0-position. A certain spring resistance is
recognized at the off position.
It is advisable to start with the thermostat in a medium
position. It is advisable to keep a temperature of 5-6°C/
41-43°F inside the refrigerator. Higher temperatures
will reduce storage time.
The ambient temperature infl uences the temperature
also inside the fridge. Avoid direct sunshine and other
heat sources close to the refrigerator.
The thermostat control knob is placed inside the
refrigerator, see description below.
3
Thermostat in CR 42,
on rear wall below freezer
compartment.
Thermostat in CR 49, inside on
horizontal wall at the rear.
Thermostat in CR 65,
inside on the rear wall to the
right.
Thermostat in CR 85 & CR
130, inside to the right behind
the light.
Alternative position in the light
housing, for CR 49, 65, 85 &
130.
Thermostat on CR 100, to the
right in the top grill above the
door.

2.2 Temperature setting ASU

The Isotherm refrigerators with ASU can be operated
in two ways. When energy saving is needed, switch to
"NORMAL.AUTO" position.
Optimal refrigeration temperature is than automatically
maintained while consuming the lowest amount of
battery power possible. When there is no need of
energy saving, switch to "MAN.TEMP" position on the
panel. The automatic function is now partially blocked
and refrigeration temperature can be manually adjusted.
In its centre position, the unit is switched off. The panel
should be positioned were it easily could be seen.
Control cable length is 4 m (13 ft.). Behind the panel a
hole of 12 mm (½") must be drilled for the cable.
NORMAL.AUTO position
- The green light indicates that power is being supplied
and the refrigeration programme is activated.
- When the engine is running and the voltage supply
(measured at the electronic unit) is above 13.2 (26.4)
volt, the compressor starts to supply cooling energy to
the holding plate. It starts within the fi rst 30 seconds and
operates fi rst at low speed with the yellow "Economy"
indicator lit.
After less than half a minute, the speed of the
compressor and the fan increase by 75% and the red
«Freeze» indicator light comes on. This operation
condition is maintained until the holding plate is
completely frozen at approximately –14°C (7°F). This
can take 20 to 40 minutes depending on the model,
ambient temperature and refrigerator size. On reaching
this temperature, the compressor stops and the red light
goes out. When the temperature of the holding plate
rises to –10°C (14°F) the compressor restarts to charge
the holding plate and the red light comes on again. This
process is repeated, keeping the holding plate at its
optimum effi ciency level. When the engine is stopped,
the compressor also stops shortly afterwards.
When the engine is stopped and the battery voltage
is below 12.7 (25.4) volt, the surplus of refrigeration
energy stored in the holding plate is used fi rst.
Only when this has been consumed does the
compressor start. The yellow light indicates that it is
now running, in the fi rst hand, at its low "Economy"
speed to "top-up" the holding plate only and maintain
the refrigeration temperature. This condition starts
when the temperature of the holding plate rises to –1°C
(30°F) and stops when it reaches economy level of
–6°C ( 21°F).
MAN.TEMP position
This position can be used either when shore-power or
Thermostat in CR 130 Drink,
inside integrated in the light
housing.