Unical HP OWER ONE 70, User'S And Installer'S Manual

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Clean the finned coil by means of compressed. x
Check out that all the terminals on the electric board as well as on the terminals of the
compressor are properly fixed.
x
Tightening of water connections. x
Check out the tightening and the balancing of the fan blades. x
Correct voltage. x
Correct absorption. x
Check the refrigerant charge. x
Check the working pressures, and superheat and subcooling. x
Check of the efficiency of circulation pump. x
Check the expansion tank. x
If the unit should be out of service for a long period, discharge water from the piping and from
heat exchanger. This operation is necessary if, during seasonal stoppages, ambient
temperature is expected to go down below the freezing point of the employed fluid.
x
9.1
CLEANING OF THE FINNED BATTERY
To perform a proper cleaning, follow the below instructions:
a) Removal of the surface dirts. Deposits like leaves, fibers, etc. must be removed using a vacuum cleaner (use a brush or other
soft tool, carefully avoiding rubbing with metal or abrasive parts). If you decide to use compressed air, it is necessary to pay
attention to keep the air flow always perpendicular to the surface of the heat exchanger for not to bend the aluminum fins. Be
careful not to bend the fins with the nozzle of the compressed air lance.
b) Rinse. Wash with water. It is possible to use chemical substances (specific detergents for finned batteries). Rinse by running the
water inside each single passage of the fins, until they are perfectly cleaned. Be careful to direct the water jet perpendicular to the
surface of the heat exchanger for not to bend the aluminum fins. Avoid hitting the battery with the water hose. It is recommended
to place your thumb on the end of the rubber pipe to obtain the pressure of the desired water jet instead of using special nozzles
that could hit the heat exchanger and damage it.
WARNING: Do not use high-pressure cleaners to clean the heat exchangerin order to prevent excessive pressure from causing
irreparable damage. Damages caused by cleaning using unproper chemicals substances or too high water pressures are not
recommended and will not be recognized.
WARNING: The aluminum fins are thin and sharp. Be very careful to use appropriate PPE to avoid cuts and abrasions. Properly
protect the eyes and face to avoid splashing of water and dirt during sufflage. Wear waterproof shoes or boots and clothing that
covers all parts of the body.
For the units that are installed in an aggressive atmosphere with a high level of fouling, the cleaning of the heat exchanger must
be part of the routine maintenance program. On this type of installation, all the dust and deposited particulates on the heat
exchanger must be removed as soon as possible by periodic cleaning, following the procedures described above.
9.2 EXTRAORDINARY MAINTENANCE
All extraordinary maintenance work must be carried out by an authorized service center.
9.3 ENVIRONMENTAL PROTECTION
According to the norms dealing with the use of depleting stratospheric ozone substances, it is forbidden to release refrigerants
fluids in the atmosphere. They have to be collected and delivered to the seller or to proper gathering points at the end of their
operating life. Refrigerant R410A is mentioned among controlled substances and for this reason it has to be subjected to the
mentioned norms. A particular care is recommended during service operations in order to reduce as much as possible any
refrigerant loss.
10 DISPOSAL
Once the unit is arrived at the end of its life cycle and needs to be removed or replaced, the following operations are
recommended:
• the refrigerant has to be recovered by trained people and sent to proper collecting centre;
• any non-freezing solutions added to the hydraulic circuit must be recovered and disposed of properly;
• compressors’ lubricating oil has to be collected and sent to proper collecting centre;
•
the electronic components such as regulators, driver cards and inverters must be disassembled and sent to collection centers;
• the frame and the various components, if not serviceable any longer, have to be dismantled and divided according to their
nature, particularly copper and aluminium, which are present in conspicuous quantity in the unit. These operations allow easy
material recover and recycling process, thus reducing the environmental impact.