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EN/05.2019 © STULZ GmbH – all rights reserved
CYBERHANDLER 2 INSTALLATION, OPERATION AND MAINTENANCE MANUAL
8 3
Air filters
Filters are equipped with a pressure switch. When the maximum allowed differential pressure
across the filter is exceeded because of clogging an alarm message is showed on Controller’s
display and filters must be replaced.
Procedure for filters replacement
• Open the access door to the filters.
• Open clamping device by pulling it out by means of the loose removal lever provided.
• Remove the filters to be changed pulling them out of the frame individually.
• Clean filter seals, check and replace damaged seals as needed.
• Put new filters.
• Close clamping device
Activity
Action, if required
Maintenance Interval
1
month
3
month
6
month
12
mont
UNIT HOUSING
Check for contamination, damage and
corrosion
Clean and repair
x
Check for water formation (condensa-tion,
leaks)
Clean and determination of cause
x
Check function of drains
Clean
x
Check flexible connections for leaks
x
ELECTRICS
Retighten electrical connection
x
8 4
Plate heat exchanger
Plate heat exchangers have no moving parts, hence mechanical maintenance is unnecessary.
If there are dirt and dust deposits in the heat exchangers, these can be easily removed, using
one of the following methods:
• with compressed air, in the case of dusty surfaces if there is a lot of dirt, but it is not firmly
attached, at the same time taking care not to damage the plates and seals;
• hot water or by using a detergent spray (e.g., Decade, ND-150, Chem Zyme, Primasept, Poly-
Det, Oakite 86M or the like) to remove greasy deposits, if there is a lot of firmly attached dirt.
Strongly alkaline or other substances corrosive to the fins or the seal should obviously be
avoided.
8 5
Plate-fin heat exchangers (Cooling coil, heating coils)
Use protection gloves to avoid injuries caused by sharp edges during maintenance
and cleaning process
Do not use high pressure water to clean coils, risk of damage to the unit
