160
COMMISSIONING
INSTALLATION
5.4
Temporary shutdown
To shut down the unit for periods of brief absences:
− deactivate the unit using the on-board control panel
only
− close the shut-off valves
− open the by-pass valve for anti-freeze protection.
In this manner, the anti-freeze logics and the compressor's
electric heating element will remain enabled.
5.5
Shutdown for extended periods
Not using the device for an extended period of time requires
user to carry out the following operations:
− deactivate the unit using the on-board control panel
− set the system's main switch to its "OFF" position, and
the device's main switch to its "OFF" position
− deactivate the internal terminal units by setting each
device's switch to its "off" position
− close the water system's shut-off valves.
9
The compressor's electric heating element and the an-
ti-freeze logics are deactivated.
9
Empty the whole system or add suitable anti-freeze fluids
if there is a risk of frost.
Ethylene glycol
percentage in weight
0
12
20
28
35
40
%
Freezing
temperature
0
-5
-10
-15 -20 -25
°C
9
If the device is to be connected in parallel to a boiler while
it is in operation, make sure that the temperature of the
water circulating inside the heat pump does not exceed
60°C.
6
MAINTENANCE
6.1
Standard maintenance
To ensure maximum efficiency and unit reliability, it
is recommended to implement a maintenance contract with
your own local service organisation. The contract includes reg-
ular inspections performed by the service's experts, so that any
malfunctions will be promptly detected and corrected, without
any serious consequences.
With a maintenance contract, our experienced technicians will
be able to ensure that the devices will last as long as possible,
and the system will be managed in the most effective manner,
even in terms of costs. The air-conditioning devices must be
serviced by authorised professional technicians, while routine
checks can be carried out locally by specialised technicians.
See the EN 378-4 or ISO 5149 standards.
All refrigerant charging, removal, discharging operations
must be carried out by qualified personnel and with the correct
material for the unit. Any inadequate handling could result in
fluid leaks or uncontrolled pressure values.
9
Prior to performing any interventions upon the machine,
always make sure that the power supply is turned off. If a
cooling circuit is opened, it must be completely drained,
refilled, and tested to check for any leaks. Prior to per-
forming any operations upon a cooling circuit, the entire
refrigerant charge must be drained from the unit using a
refrigerant recovery unit.
Simple preventive maintenance operations can ensure the
unit's excellent performance:
− improved heating and cooling performance
− reduced energy consumption
− prevention of accidental component functions
− prevention of major interventions, thus ensuring sav-
ings in terms of time and costs
− protection of the environment.
The units require five different levels of maintenance.
9
Any deviations or failure to observe these maintenance cri-
teria will nullify the unit's warranty conditions, thus re-
leasing the manufacturer of any responsibility.
6.1.1
Maintenance level 1
Simple procedures can be performed by the user on a weekly
basis:
− visually check for any traces of oil (indication of a refrig-
erant leak);
− clean the air heat exchanger;
− check for any protection devices that may have been re-
moved, and any doors or covers that may not have been
closed properly;
− check the unit alarm report while the unit is not in func-
tion (refer to section "Control Panel");
− visually check for any signs of deterioration;
− check the charge on the level indicator;
− check that the difference in water temperature between
the heat exchanger's inlet and delivery is correct.
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