CLIVET WSAN-XES 18.2, Instructions For Installation, Use And Maintenance Manual, Page: 47 / 52

47 WSAN-XES 18.2-35.2 M0SM40N17-04
WATER EXCHANGER
It is very important for the exchanger to be able to
provide the maximum thermal exchange. Therefore, it
is essential for the inner surfaces to be clean of dirt
and incrustations.
Periodically check the difference between the
temperature of the supply water and the condensation
temperature. If the difference is greater than 8 °C – 10
° C it is advisable to clean the exchanger.
The clearing must be effected :

With circulation opposite to the usual one

With a speed at least 1,5 times higher than the
nominal one

With an appropriate product moderately acid (95%
water + 5% phosphoric acid

After the cleaning rince with water to inhibe the
detergent rests.
Water filter
Check that no impurities prevent the correct passage
of water.
Flow switch

check operation

remove incrustations from the blade
Pressure relief valve
The pressure relief valve must be replaced :

if it has intervened

if there is oxidation

based on the date of manufacture, in compliance
with local regulations.
Circulation pumps
Check:

there are no leaks

status of the bearings (anomalies are indicated by
abnormal noises and vibrations)

the terminal protection covers are closed and the
cable glands are properly positioned
Insulations
Check the condition of the insulations: if necessary
apply glue and renew the seals.
AIR COIL
Contact with the exchanger fins can cause cuts: wear
protective gloves to perform the above described
operations.
It is extremely important that the battery gives the
maximum thermal exchange; therefore, its surface
must be cleaned from dust and deposits. Remove all
impurities from the surface
Using an air pressure gun, clean the aluminum surface
of the battery. Be careful to direct the air in the
opposite direction of the fan air
Hold the gun parallel to the fins to avoid damages. As
an alternative, an aspirator can be used to suck
impurities from the air input side.
NO
YES
20°
YES
NO
90°
90°