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IOM_WPHBA HE-WPHA HE_091a1201_207815_180701_EN
HORIZONTAL WATER-AIR COMPACT PACKAGED UNITS
WPHA HE / WPHBA HE
OPERATION
BEFORE START UP
Start up has to be performed by a qualified service personnel in air conditioning.
Make sure that panels are firmly secured with screws.
Check that there is no leakage of oil or refrigerant.
Ensure that the unit is evenly levelled.
Check if there is enough space for operation and maintenance.
Before opening the electrical panel and having access to the inside of the machine it is MANDATORY to
disconnect the power supply hose of the machine which MUST BE FREE OF VOLTAGE for this operation.
Check that the drainage is not blocked.
Verify if there are losses of water. Check that the valves work correctly.
Check the water circuit allows its emptying for repairs or stop and its correct air purge.
Always use the electrical diagram of the unit to make the connections.
Make sure that all electrical connections are properly tight.
The power supply of the unit must be as indicated on the serial plate. Damage caused by the start-up of the unit
in an incorrect voltage line is not covered by Hitecsa’s warranty.
The unit must not be supplied with any other voltage than that indicated on the serial plate. The power supply to
the unit must be within 10% of the voltage indicated on the serial plate.
Check the correct rotation direction of the fans.
The installer must place line protection elements in accordance with current legislation.
Wiring of electrical connections must be protected by a tube or other cable conduits.
Make sure if the crankcase heater of each compressor has been operating during 24 hours prior the Start Up.
Check that the air filters are clean and correctly fitted.
Check the condition and placement of grilles, diffusers, air ducts, tarpaulins, etc.
START UP
It is very important to evacuate air from the system and clean dirt particles of the water circuit. The two
operations must be done at the same time.
At first start up the water pump for a few minutes.
Stop the water pump and notice if the automatic purge is working. Repeat this operation 10 times. If it proceeds
in this way, all the existing air will go out from the system and the water circuit will be filled.
The next step is to remove the water mesh filter and clean it. The performance of the system will improve since
the dirty mesh filter has a high pressure drop.
It is necessary to take notes of the air inlet and outlet temperatures to the internal coil, the volts and amps of the
compressor and motor fan, as well as the suction and discharge pressure of each compressor.
It should be remembered that it is necessary to clean the air filters after the first 4 hours of operation.
Observe, at least, 3 cooling cycle operations.
