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IOM_WPHBA HE-WPHA HE_091a1201_207815_180701_EN
HORIZONTAL WATER-AIR COMPACT PACKAGED UNITS
WPHA HE / WPHBA HE
MAINTENANCE
Plate heat exchanger:
it is necessary to clean the plate heat exchanger of the evaporator at least once a year.
The plate exchanger is cleaned by circulating the cleaning liquid inside. A deposit with acid (5% phosphorus acid
should be used, and if it is necessary to clean more frequently, use 5% oxalic acid). Introduce the cleaning liquid
through the heat exchanger. To achieve an effective cleaning, the acid should be circulated at least 1.5 times the
normal flow rate of water, and if possible in the opposite direction. Then the circuit must be
cleaned with a large
amount of water to remove traces of acid. Put new water and start
.
Compressor:
Check regularly the lubricant oil level, the presence of vibrations or noises and the insulation of the
motor.
DO NOT FORGET to stop the crankcase resistance for 24 hours before starting up the compressor.
COMPRESSOR LUBRICATION
-
Compressors with R-410A refrigerant use synthetic polyester lubricant oils. Each compressor manufacturer has a
specific lubricant oil for its product.
-
The compressor or system must not be open to the air for more than 15 minutes.
-
The synthetic polyol-ester lubricant oil has the capacity to absorb humidity 100 times more than the mineral oil used
with the R22 refrigerant.
Legend
1.
Plate heat exchanger
2.
Cleaning liquid (Water + Acid)
3.
Circulating pump
4.
Cleaning circuit stock pops
5.
Water circuit stock pops
