i-SHWAK V4
Inverter air/water chillers and heat pumps with wall-mounted indoor unit and remote condensing outdoor unit
28
x
Check if the anti-vibration couplings exist on hydraulic pipes.
x
Check if the shut-off valves of the hydraulic circuits are opened.
x
Check that the hydraulic circuit has been loaded into required pressure and vented from air.
x
Check that all the hydraulic connections are carried out correctly and that all information on the labels is respected.
x
Ensure that arrangements have been provided to drain condensate.
x
Ensure that power cables and all terminals are well connected.
x
Check that the electrical connections have been made according to applicable regulations including grounding.
x
The voltage must be specified on the nameplate of the unit.
x
Ensure that the voltage is within the tolerance limits of (±10%).
x
Check that the refrigerant connections have been made correctly and that the shut-off valves are open.
x
Check that the heating elements of the compressor are powered properly.
x
Ensure that there are no gas leaks.
x
Before the start up, check that all shutting panels are positioned and fixed with proper screws.
WARNING: The unit must be connected to the electrical network and should be adjusted in STAND-BY mode
(powered) turning on the general switch for a minimum of 12 hours before start up in order to operate the crankcase
heaters of the compressor, for allowing the proper heat to the compressor crankcase (the heaters are automatically
electrified when the switch is closed).The crankcase heaters turns on properly if after some minutes the temperature
of crankcase’s compressor is about 10°C ÷ 15°C higher than ambient temperature.
WARNING: Never switch off the unit (for a temporary stop) by the way of the main switch, this last component
should be used to disconnect the unit from the power supply only for lengthy stoppages (e.g. seasonal stoppages).
Besides, failing the power supply, the crankcase’s resistances are not supplied thus resulting in a possible breakdown
of the compressors once the unit is switched on.
WARNING: Do not modify the internal wiring of the unit otherwise the warranty will terminate immediately.
WARNING: The summer/winter operating mode has to be selected at the beginning of the related season. Frequent
and sudden changes of this operation should be avoided in order to prevent severe damages to compressors.
WARNING: For the first installation and start-up of the unit, make sure that the unit is working correctly in both
cooling and heating modes.
10
INDICATIONS FOR THE USER
Write down the identification data of the unit for to provide them to the service center in the event of a request for assistance.
The identification label of the machine reports the technical data and performance of the equipment.
In case of lost or damage identification label, ask a duplicate to a Technical Service Center.
Tampering with, removal, deterioration of identification label, makes difficult any operation of installation,
maintenance and demand for spare parts.
It is advisable to keep track of the work performed on the unit, so any troubleshooting will be easy to find.
In case of failure or malfunction:
x
check the type of alarm to indicate to the service center;
x
contact an authorized service center;
x
if required by the service center, turn off the unit immediately without resetting the alarm;
x
use only original spare parts.
11
SHUTDOWNS FOR LONG PERIODS
The types of shutdown depends on the weather of the site where the unit is installed and on the period of the stop. The antifreeze
system, if it’s installed, stay
on work also with the on-
board control unit in “OFF” position.
If the time of stop is long and the temperature is low, we recommend you to drain the hydraulic circuits or use a mixture of water
and glycol.
Discharge the hydraulic circuits and shutdown the unit following the below steps:
x
Turn off the units from control panel (displayed
“OFF”
).
x
Close the water tap.
x
Place the general differential QF switch in
“OFF” state
(if it is installed upstream of the system).
If the indoor unit is installed in areas of the building subject to low temperatures (attics, basements, etc.) and the
temperature drops below 0°C there is serious danger of frost: provide please a mixture of water and glycol in the
plant system, otherwise drain the water system and the hydraulic circuits of the heat pump.
If it is necessary to add glycol to the hydraulic circuit of the plant, provide a T-fitting with tap downstream of the
non-return valve on the loading/topping up pipe (see Paragraph 8.5), in order to adapt the glycol concentration.
WARNING: even the transient operation, with water temperatures below +5°C is not guaranteed on the basis of the
limits set out in Paragraph 19.4. 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.
