i-32V5
Air/Water heat pumps wih axial fans
30
The anti-freeze system remains in operation if the continuity of electrical supply to the appliances is guaranteed.
If the system is expected to remain idle for a long period, it is recommended to empty the liquid from the system unless there is an adequate
amount of glycol.
To switch off the unit completely after having emptied the system:
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Switch off the unit setting the switch of each appliance at “OFF”.
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Close the water valves
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Set the general residual current device at “OFF” (if installed upstream of the system).
If the temperature drops below zero there is serious danger of frost: provide a mixture of water and glycol in the system,
otherwise drain the water system and the circuits of the heat pump.
CAUTION: even the transient operation, with water temperatures below +5°C is not guaranteed on the basis of the limits es
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tablished.Before you turn the unit back on after a long idle period, make sure that the temperature of the mixture of water
and glycol is higher than or at least equal to +5°C.
9.
MAINTENANCE AND PERIODIC CHECKS
CAUTION: All the operations described in this chapter MUST BE CARRIED OUT BY QUALIFIED PERSONNEL ONLY. Before per
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forming any intervention on the unit or accessing internal parts, make sure you have disconnected power.
CAUTION: Before starting to operate, safety checks must be performed to ensure the combustion hazard is reduced to the
minimum. The work must be undertaken according to a controlled procedure, to reduce to the minimum the risk of flam
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mable gases or vapours while performing the work. The area must be checked with an appropriate refrigerant fluid detector
before and during the work.
Maintenance must only be carried out in weather conditions suitable for the intended operations.
CAUTION: it is possible that a certain quantity of oil from the compressor is deposited in the pipes of the refrigeration circuit,
especially by bends. In case of maintenance operations in which it is necessary to unsolder the pipes, it is strongly recom
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mended to proceed with the cutting of the same and not with the disordering with a torch, as the flame triggers any oil
present.
It is prohibited to fill the refrigerant circuits with a refrigerant other than that indicated on the identification plate. Using a
different refrigerant can cause serious damage to the compressor.
It is prohibited to use oils other than those indicated in this manual. Using a different oil can cause serious damage to the
compressor
The head and discharge pipe of the compressor are usually at quite high temperatures.
Be careful when working near the condensing coils. The aluminium fins are very sharp and can cause serious injuries. Always
use appropriate personal protective equipment.
After the maintenance operations, close the panels by fixing them with screws. Pay particular attention to the correct closing
of the electrical panel box.
After the maintenance operations, pay attention to the correct tightening of the cable gland designed for the passage of the
electric power cable.
It is recommended to have specialised personnel perform periodical inspections and maintenance. The EU regulation
n.517/2014 establishes that users must perform regular inspections on the plants, checking water tightness and eliminating
any leaks as quickly as possible. Verify the mandatory nature and the documentation required in regulation n.517/2014 and
its subsequent amendments or repeals.
The following are the recommended and mandatory activities for correct operation of the unit. The mandatory activities must be carried out
by an authorised customer service which issues a corresponding certificate. Failure to comply with these activities will entail forfeiture of the
