10 Service and maintenance
39
•
Let cooling water drain off via the extraction site
(-2- Fig. 17) and drain screw on the water filter
housing (-1- Fig. 17).
•
Open filter housing and remove filter elements.
•
Clean the filter head and insert a new housing seal.
•
Insert a new filter element and close filter housing
again.
•
Re-close drain valve and screw.
Changing times for the water filter
The operating conditions (e.g., cooling medium
temperatures), the operating modes and the quality of
the suctioned air (e.g., dust content, content of gaseous
foreign matter such as SO
2,
solvents, etc.) has a strong
influence on the filter service life.
In these operational cases, shorter change intervals are
possible.
10.6
Replace prefilter RO unit
WARNING
Air/water under pressure may cause severe
personal injury.
•
Shut down compressor, relieve system
of all pressure, disconnect, lockout and
tagout power supply to the compressor
package before removing valves, caps,
plugs, fittings, bolts and filters.
•
Make sure that system is leak tight!
Fig. 18
1 RO membrane cartridge
2 Prefilter RO unit
3 Permeate pump
Perform the prefilter change as follows:
•
Turn off compressor, secure it from being switched
on again, and make sure that it is depressurized
and volt-free.
•
Close the main water supply connection and valve
on the storage tank.
•
Screw off the filter housing (-2- Fig. 18) and remove
the filter element.
•
Insert a new filter element and hand tighten the filter
housing. Before the prefilter element can be
installed, the element should be rinsed out with
clean water so that all coaldust has been removed.
•
Re-open the main water supply and the storage tank
valve.
Changing times for prefilter RO unit
You will find the changing intervals listed in the
maintenance schedule (see chapter 10.3).
The quality of the main water supply has a strong
influence on the filter service life.
In the event of unfavorable conditions, shorter changing
intervals are possible.
In order to determine the water quality, a water sample
can be extracted as needed (see- Fig. 17).
Summary of Contents for EnviroAire 15
Page 1: ...Original Operating and Service Manual 15 22 kW USA Id no ZS1093133 00 June 2012...
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Page 52: ...12 Annex 50 Fig 29 all dimensions in Inches...
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