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Maintenance
11.3 Unit booklet
It’s advisable to create a unit booklet to take notes of the
unit interventions.
In this way it will be easier to adequately note the various
interventions and aid any troubleshooting.
Report on the booklet:
• date
• intervention description
• carried out measures etc.
11.4 Standby mode
In case of a long period of inactivity:
► turn off the power
► avoid the risk of frost (use glycol or empty the system)
11.5 Emptying the system
The units are not fitted with a drain valve, so one must be
provided on a pipe connecting to the system near to the
device and below it.
All operations must be carried out with the unit shut
down and disconnected from the mains power supply.
Before emptying:
• check that the system water filling/refilling valve is closed
To drain the system:
• open the drain valve on the outside of the device
► open all of the system and terminal relief valves
11.6 Cleanliness of the structure
To clean:
► wash at least once or twice a year depending on exposu-
re (pollution, salt deposits, dirt)
► clean with neutral detergent and cold or warm water
(max 30°C).
Do not use solvents or acid, alkaline, abrasive products.
Check the condition of the parts making up the
structure.
Paint so as to eliminate or reduce oxidation at the
points in the unit where this problem may occur
Check the fastening of the external paneling of the
unit. Poor fastening may give rise to malfunctions and
abnormal noise and vibration,
11.7 Air side exchanger
The coil must allow maximum thermal exchange, therefore,
the surface must be clear from dirt and scaling.
Clean at least every three months.
The cleaning frequency must be increased according to
the build-up of dirt/dust and the environment (e.g. coa-
stal areas with chlorides and salts or industrial areas with
aggressive substances).
To clean:
► use a soft brush or aspirator or pressurised air jet or
high-pressure water jet machine
► effettuare la pulizia sul lato di ingresso dell’aria
► keep the direction parallel to the flow of the flaps to avoid
damages
Check that the aluminium ns are not bent or damaged,
in the event of damages contact the authorised service
centre which will “comb” the coil to restore optimal air
ow
Accidental contact with the exchanger flaps can cause
injuries from cut: use protective gloves.
11.8 Water pressure
► check that the water pressure is greater than 1 bar
If necessary:
► add water up to 1.5-1.8 bar
11.9 Water filter
► check and clean the water filter
In case of obstruction:
► clean the filter
11.10 Safety valve
► check the safety valve for leakage
► check that the pressure relief valve pipe is correctly posi-
tioned for draining the water
► check that the safety valve pipe is free from obstruction
11.11 Unit electrical panel
► visually inspect the electrical panel
► check the tightness of the connections
► check the cleanliness of the electrical panel
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