Unical HP OWER 320RK, Руководство пользователя и инсталлятора

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7.1 SWITCHING ON THE UNIT
To supply power to the machine, turn the external handle of the disconnector to ON (“I”).
The unit display only switches on if the phase sequence is correct (inspection to be made when commissioning the unit).
Wait at least 1 minute between switching the unit off and back on again.
7. INSTRUCTIONS FOR THE USER
Write down the unit’s identification data to be able to give it to the assistance centre when requesting an intervention.
The identification plate applied on the machine has all of the technical and performance data of the appliance.
In case of tampering, removal or deterioration, ask the Technical Assistance Service for a copy.
Tampering, removal and deterioration of the identification plate complicates installation, maintenance and request for
spare parts.
We recommend keeping track of the interventions carried out on the unit so as to make any troubleshooting easier.
In case of failure or malfunctioning:
• check the type of alarm triggered to report it to the assistance centre;
• contact an authorised assistance centre;
• if requested by the assistance centre, immediately deactivate the unit without resetting the alarm;
• request that original spare parts be used.
8. SHUTDOWNS FOR LONG PERIODS
The shutdown mode of the plant depends on the site of application and the time the plant is expected to be shut down. If the unit is equipped
with the antifreeze system, even when off (system on unit at “off” position).
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 of time, 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:
• Switch off the unit setting the switch of each appliance at"OFF".
• Close the water valves.
• 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-
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.
In the versions designed for low temperature operation (-8 ° C ÷ + 4 ° C), the concentration of glycol present and the relative
freezing point must always be checked. Below this temperature it is forbidden to start the unit.
9. MAINTENANCE AND PERIODIC CHECKS
CAUTION: All the operations described in this chapter MUST BE CARRIED OUT BY QUALIFIED PERSONNEL ONLY. Before per-
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-
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 operations envisaged.