Innova 3in1 5M Installer Manual page 50

MAINTENANCE
Routine maintenance of the unit
Hydraulic circuit
Check:
• water circuit filling
• filter cleanliness
• pressure switch and flowmeter control
• absence of air in the circuit (venting)
• that the water flow rate is always constant at the evapo-
rator
• the status of thermal insulation of the hydraulic piping
• the glycol percentage, if any
Electric circuit
Check:
• electrical supply voltage
• electric draw
• tightness of connections
• that there is no damage or excessive wear on the electrical
cables
• the seals and sealing materials have not deteriorated to
such an extent that they are no longer suitable for pre-
venting the development of flammable atmospheres in-
side
• correct fixing of the cable clamps
• safety devices
Mechanical checks
Check:
• the tightness of the screws, the compressors and the elec-
trical box, the external panelling of the unit
• the conditions of the structure
Poor fastenings cause abnormal noises and vibrations.
Treat any rusty parts with paints suitable to eliminate or
reduce the rust.
Cleaning
• clean cosmetic covering elements
Refrigeration checks
Make sure that:
• the amount of charge complies with the size of the room
in which the parts containing the refrigerant are installed
(Minimum floor area reference table)
• ventilation equipment and vents functioning properly
and not obstructed
• the marking on the equipment must remain visible and
legible. Illegible markings and graphics must be corrected
• the refrigerant pipes and components are installed in a
position in which they are unlikely to be exposed to cor-
rosive substances unless the components are made of
inherently corrosion-resistant materials or adequately pro-
tected against corrosion
• the thermodynamic values are within the nominal param-
eters
Under the provisions of Directive 517/2014/EU, plants
containing more than 5 equivalent tonnes of CO2 (7.41
50
kg of R32 gas or 2.39 kg of R410a gas) must be checked for
leaks once a year, using either direct or indirect methods,
by personnel certified under EU Regulation 2015/2067.
The company responsible for maintenance must keep a log-
book in which the following information is recorded:
• the technician who performed the maintenance or repair,
• the dates and results of the checks,
• the quantity and type of fluorinated gas used,
• any quantities added or recovered during servicing, repair
or final disposal.
If needed, a form is available at in the manual of the com-
bined external unit.
It is forbidden to charge the refrigeration circuit with a re-
frigerant other than the one indicated. The use of a differ-
ent refrigerant gas can