Originally Posted by Neptune's Gear
I think there is a bit of confusion here. If you use the Ozefridge AW480 with the water cooling, it will be Water Cooled - the fan will only cool the electronics
, and the water will cool the refrigerant. If you turn off the water cooling, the unit will be air cooled only, and you will feel the warmer air coming out from the fans.
Thanks all for the extra links to Ozefridge discussions and the photos…. Seems like the OzeFridge is well received in Australia
Matt, I’m a bit confused about your above statement?
My understanding is that by installing the AW480 you do have the “option” of water or air cooling and that it is switchable depending on the heat load or if you want to turn off the water pump
at night…. Then if it cycles on the twin fans will kick into high gear
Their explanation is on this page: Why Ozefridge | Ozefridge
Am I missing something??
The A480 uses a triple pass air only condenser while the AW480 model uses the unique Ozefridge engineered air and water cooled condenser and can operate as either air or water cooled.
The condenser fan and water pump
are thermostatically controlled to maintain correct condensing. On both models, the condenser temperature can be read by pressing the lower left controller button. Condenser fan and pump
are thermostatically controlled to cope with all environments.
AW480 with water cooling: Heat laden refrigerant gas flows through the ‘yellow & purple’ coil passes while water is sent separately through the ‘green’ coil passes to extract heat.
This condenser allows the system to be operated as ‘air cooled only’ with heat dissipated via the condensers massive 6550 square cm of fin surface area.
When water cooling is employed, water passes through the water coil cooling the condensers fins and this in turn cools the refrigerant gases.
This simple but practical method of water cooling eliminates electrolysis
problems associated with other methods such as ‘keel coolers’ and ‘shell and tube’.
Unlike other water cooled condensers, the refrigerant is not in direct contact with the water galleries and therefore can’t be lost
or contaminated due to electrolysis
This condenser is best water cooled by re-cycling water from the vessel’s fresh water tank
with the pump
kit supplied. ( Using raw water
is not recommended and will cause harm eventually)
The Ozefridge condenser is conformal coated to resist air borne corrosives.
Water cooling is essential on twin plate freezer systems and highly recommended for all systems specially if used in the tropics or other hot climates.
Water is provided by using the Ozefridge P3 water pump kit supplied with AW480 units. This kit comprises a micro centrifugal pump, 10 Metres of food
grade vinyl tubing and a check valve.
The P3 pump is to be wired to the pump terminals on the AW480 and then operates automatically when the compressor
runs. (Temp. controlled) Passing through food
grade materials, the fresh water is not harmed or consumed.
The ‘Air / Water’ switch allows the choice of condensing. (Switch off at night!)
Water cooling is said to increase power consumption
. This may be true of other systems or methods, but is totaly wrong for the Ozefridge method.
The P3 water pump uses less than 3 watts/hour (1/4 amp!) yet reduces the compressor
consumption by >18 watts/hour and decreases run cycle times by up to 34%. (At 40c)
The Ozefridge water cooling method greatly reduces overall power consumption without fear of electrolysis damage.
The P3 water pump is the centrifugal type and therefore much quieter, easier running and use far less power than the diaphragm