Unical HP_OWER ONE 70R, User'S And Installer'S Manual

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CAUTION: The unit must be connected to the electric mains and placed in STANDBY (powered on) by closing the
master switch at least 12 hours before start-up. This will allow the heaters to adequately warm up the compressor
crankcase (the heaters are powered automatically when the switch is closed). The heaters are working properly if
after a few minutes the temperature of the compressor crankcase is 10-15°C higher than ambient temperature.
CAUTION: check that the weight of the pipes does not bear upon the machine structure.
CAUTION: Never use the master switch to stop the unit temporarily. This must only be done to disconnect the unit
from the power supply for long downtimes (e.g. seasonal stops etc.). Furthermore power is missing, the crankcase
heaters will not be powered with the risk of breaking the compressors when the unit is switched on.
CAUTION: Do not modify the electrical connections of the unit so as not to immediately terminate the warranty.
CAUTION: Summer/winter operation must be selected at the start of the relative season. Frequent and sudden
changes of this operation must be avoided so as not to damage the compressors.
CAUTION: Upon initial installation and start-up, make sure that the machine works properly both in heating and
cooling mode.
7.1 SWITCHING ON THE UNIT
To supply power to the machine activate the magnetothermic switch and, if present, 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.
The phase protection module (in the 160RT/RTK – 180RT/RTK models) detects the correct sequence of the supply phases L1, L2,
L3. When the module activates due to lack of phase, the power supply to the control board is interrupted.
8 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.
9 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 antifreeze system keeps running if
power supply continuity to the equipment 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 established in Paragraph 15.4. 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.