26
WARNING: When you first install and start-up the unit make sure that the unit is working properly in both cooling
and heating modes.
8.1
POWER-ON OF THE UNIT
For powering on the appliance, rotate the outer handle of the disconnector to the ON position (indicated with "I").
The display on the machine is turned on only if the phase sequence is correct (verification to be done during initial startup).
Between a shutdown and subsequent power on, wait a minimum time of 1 minute.
9
INDICATIONS FOR THE USER
It’s important to take note of the identification data of the unit in order to provide them to the Technical Assistance Service in case
of assistance request.
The identification plate fixed on the unit shows the technical specifications and the performance of the equipment.
In case of manumission, removal or deterioration, please ask a duplicate to the Technical Assistance Service.
The manumission, removal or damaging of the nameplate makes difficult any operation of installation,
maintenance and spare parts request.
It is recommended to keep track of assistance operations done on the unit; this will make easy searching any troubleshooting.
In case breakdown or malfunction situations:
•
check the type of alarm to communicate it to the service center;
•
contact an authorized service center;
•
if required by the service center, turn off the unit immediately without resetting the alarm;
•
Ask the use of original spare parts.
10
SHUTDOWNS FOR LONG PERIODS
• Turn off the unit by placing the switch of each unit to "OFF" position.
• Close the water valves.
• Place the general differential circuit breaker to "OFF" position.
If the temperature drops below 0°C there is a serious risk of frost: add a mixture of water and glycol in the plant,
otherwise drain the hydraulic circuits of the plant and of the heat pump.
WARNING: if the ambient temperature becomes lower than -20°C (value that is permitted only on i-HP LT series), in
case the unit is turned off and powered down also for short periods, it’s compulsory to drain the plant and the
hydraulic circuit of the unit by the mixture of water and glycol. Otherwise, the circulator may be irreversibly
damaged.
WARNING: with water temperatures below than +5°C, although the transient operation is not guaranteed regarding
the limits set out in Paragraph 20.4. Before you turn the unit on after a long off period, make sure that the
temperature of the mixture of water and glycol is higher than or at least equal to +5°C.
11
MAINTENANCE AND PERIODICAL CONTROLS
If the temperature drops below 0°C there is serious danger of frost: add a mixture of water and glycol in the plant,
otherwise drain the hydraulic circuits of the plant and of the heat pump.
WARNING: if the ambient temperature becomes lower than -20°C (value that is permitted only on i-HP LT series), in
case the unit is turned off and powered down also for short periods, it’s compulsory to drain the plant and the
hydraulic circuit of the unit by the mixture of water and glycol. Otherwise, the circulator may be irreversibly
damaged.
WARNING: the operation, although it was transient, with water temperatures below +5°C is not guaranteed on the
basis of the limits set out in Paragraph 20.4. Before you turn the unit on after a long off period, make sure that the
temperature of the mixture of water and glycol is higher than or at least equal to +5°C.
WARNING: All the operations described in this chapter HAVE TO BE CARRIED OUT BY TRAINED STAFF ONLY. Before
any operation or before entering the inner components of the unit, be sure that the power supply is disconnected.
The compressor’s heads and discharge pipes are usually at high temperature levels. Be very careful when operating
in their surroundings. Aluminium coil fins are very sharp and can cause serious wounds. Be very careful when
operating in near them. After maintenance operations, re-install the cover panels, and fix them by means of screws.
The refrigerant circuits must not be filled with different gas other than that indicated on the nameplate. The use of a
different refrigerant can cause severe damage to the compressor.
It’s forbidden to use oils other than those specified in this manual. The use of different oil can cause serious damage
to the compressor.
WARNING: MOVING PARTS, RISK OF DEATH.
Disconnect the power supply and ensure that the fan is stopped before opening the front panel.
The temperatures of heads and exhaust piping of the compressor are usually high.
Pay attention to the surfaces of the driver boards heat sinks (see Chapter
Errore. L'origine riferimento non è stata
trovata.
), which can become very hot.
Be careful when working near condensing coils.
The aluminum fins are very sharp and can cause serious injuries.
