AWG
Max cable length
in ft 12 volt
Max cable length
in ft 24 volt
12
8
16
10
15
30
8
26
52
2.3 Wire gauge selection chart 12 & 24 Volt
2.4 Door panel
The front panels on the doors can be replaced or additional
standard front panels in white, teak, mahogany or cherry can be
mounted on top of the standard panel.
Use a screwdriver or a knife as a lever and pull off the lower door
profi le. Unscrew the three screws holding the door lock.
Mount the extra panel on top of the existing one, fasten the door
lock again and push in the lower door profi le.
See fi g. 5 and 6.
General AC/DC
Both AC an DC power supply can be connected to the electronic
unit at the same time. AC will be preferred power supply source
if that is the case. If the AC power supply is disconnected, a
time delay of 1 minute will be activated before the compressor
continuous on DC power supply. If AC power supply is
established there will be no delay in compressor operation, when
power supply is shifting from DC to AC.The light power supply is
connected to A and C. The output voltage on A and C is always
regulated to 12 VDC. A 12 VDC bulb must be used for both 12
and 24 VDC power supply systems.
See wiring diagram fi g. 9
3 Operation
3.1 Temperature setting
The refrigerator/freezer unit is fi tted with a manually operated
thermostat. The thermostat control knob is placed inside the
refrigerator compartment to the left.
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,
do not set the thermostat in the coldest position.
Remember
that the thermostat settings are effected by variations in ambient
temperature, the quantity of stored food, its position and how
often the doors are opened.
If the ambient temperature is very high the compressor
might work continuously causing the occasional formation
of frost. If this occurs the thermostat knob should be turned
to a lower number = warmer setting, to allow the compressor
to cycle on and off.
If suffi cient temperature can not be reached with thermostat/
compressor still cycling, it is a sign of improper ventilation on the
rear side of the refrigerator/freezer.
The unit has just one thermostat, the freezer will automatically
get the correct freezing temperature corresponding to the
refrigeration temperature selected.
When the refrigerator/freezer is switched on after it has been out
of use, the freezer compartment will be cold rather quick but it will
take several hours until the refrigeration temperature is reached.
To reduce humidity and the consequent increase of frost, never
place liquids in unsealed containers in the refrigerator.
3.2
Defrosting
Defrosting shall be made when the frost layer is more than 1/8”
thick. Set the thermostat in OFF position. Store the foodstuff and
the liquid as cold as possible during the defrosting process. Do
not use sharp metal tools to remove frost or ice. Do not re-start
until the refrigerator/freezer is completely defrosted, cleaned
and dried. Empty and clean also the plastic tray in the lower
part of the compartments. The refrigeration compartment has a
condense water drainage to the rear of the cabinet. Outside is
a container mounted, were the condense water is automatically
evaporated.
4 Maintenance
The Isotherm refrigeration systems have a fully hermetic closed
cooling system and do not require any maintenance or refi lling of
refrigerant.
The compressor is of domestic type and has a very high
effi ciency and an outstanding life-time. The refrigerator/freezer
shall be left in the boat during the winter. (If the temperature
is below freezing point, the compressor may not start). The
maintenance is reduced to periodically, not less than a year,
cleaning of the condenser from dust. Use a soft brush and no
sharp tools. Keep the cabinet inside clean. Use lukewarm water
and a mild detergent for cleaning the inside. Put the doors, during
not in operation periods, in their slightly open ventilation position.
Release the catch on the door for this purpose with a coin or
a small screwdriver (fi g. 1 and 2) (not valid for Stailess steel
version, “INOX”). Take out the bulb from the internal light to avoid
power consumption or switch off a main switch if there is one
installed connected to the refrigerator/freezer power supply. (Fig
3 and 4)
To prevent ice and frost build-up on the freezer door seal, this
is warmed up by means of a internal warming system. It is not
electrical connected.
4.1 Battery voltage sensor
To protect the batteries from becoming completely discharged, a
battery voltage sensor switches off the compressor automatically
at the following levels:
System Voltage
Cut-out
Cut-in
12 V
9.6 V (10.4 V)
10.9 V (11.7 V)
24 V
21.3 V (22.8 V)
22.7 V (24.2 V)
If the bridge between C and P is cut off, the values within
the ( ) are valid.
