RHOSS MICROSYSTEM TCCE 14 Instrucciones De Uso página 33

II.8.1 CONFIGURATION
Safety component calibration
settings
High pressure switch
Low pressure switch
Water differential pressure
switch
Configuration parameters
Summer working temperature set point
Winter working temperature set point (THCE)
Working temperature differential
Antifreeze temperature set point
Antifreeze temperature differential
Maximum defrost time
Water differential pressure switch time upon start-up
Water differential pressure switch exclusion time upon start-
up
Pump switch off time delay
Minimum time between two consecutive compressor start-ups
Pre-ventilation time
The units are tested in the factory, where they are also calibrated and
the default parameter settings are put in. These guarantee that the
appliances run correctly in rated working conditions. The machine
configuration is carried out in the factory and should never be altered.
II.8.2 UNIT START-UP
Before starting the unit, perform the following checks:
○ The electricity power supply must comply with the specifications on
the data plate and/or the wiring diagram and it must fall within the
following limits:
• Variation of the power supply frequency: ±2 Hz.
• variation of the power supply voltage: ±10% of the nominal voltage;
• imbalance between the supply phases: <2%.
○ the electrical power supply must supply an adequate current for
supporting the load;
○ access the electric panel and make sure the power supply terminals
and contactors are tight (they may have loosened during transport, with
consequent risk of malfunction);
○ check that the water system inlet and outlet pipes are connected in
accordance with the arrows next to the machine water inlet/outlet;
○ check that the air-side heat exchanger is clean and that the airways
are clear.
Electrical connections must be made in compliance with the local
installation standards in force in the place where the unit is installed,
and with the instructions in the wiring diagram provided with the unit.
The installer is responsible for using power supply cables of appropriate
size.
IMPORTANT!
Before connecting the main power supply cables
L1-L2-L3+N to the terminals of the general isolator
check that they are in the correct sequence.
The machine can be started by pressing the ON/OFF,RESET-DOWN
key on the keyboard built into the machine. Using the MODE-UP key,
select an operating mode (chiller or heat-pump). Any problems the
system encounters will be immediately shown on the display on the
control keyboard. At start-up, the first device to start in the system is the
pump, which has priority over the rest of the system. During this phase,
the minimum water flow differential pressure switch and the low
pressure switch are ignored for a preset time, in order to avoid hunting
caused by air bubbles or turbulence in the hydraulic circuit or by
pressure fluctuations in the refrigerant circuit. Once these time-delays
are over, final enablement is given to the machine, and the fan starts
up, followed after another safety time-lag by the compressor.
All manuals and user guides at all-guides.com
Cut-in Reset
27.5 bar 20 bar - Manual
0.7 bar 2.2 bar - Automatic
80 mbar 105 mbar - Automatic
Standard setting
12°C
II.8.3 PERIODS OUT OF USE
IMPORTANT!
Failure to use the unit during the winter period may
cause the water contained in the system to freeze.
When the machine is out of use for long periods of time, it is necessary
to disconnect it from the mains by opening the mains switch.
All the water contained in the circuit must be drained. During
installation, consider mixing the water in the circuit with the correct
proportion of ethylene glycol to guarantee protection against freezing
40°C
(see SECTION II).
2°C
3°C
II.8.4 STARTING UP AGAIN AFTER LONG PERIODS
2°C
OF INACTIVITY
10'
Before starting up again, make sure that:
120"
• the air-side heat exchanger is in good condition and is clean;
15"
• there is no air in the water system (bleed it if necessary);
• the water in the heat-exchanger circulates at the rate required, (in
15"
the T and H versions the pump use and maintenance manual is
360"
provided).
30"
II.9 NATURE AND FREQUENCY OF SCHEDULED
INSPECTIONS
DANGER!
Maintenance operations, even if for inspection
purposes only, must be carried out by skilled
technicians, qualified for working on air
conditioning and refrigerant products.
DANGER!
Always use the mains switch to isolate the unit
from the mains before carrying out any
maintenance work on the unit, even if it is for
inspection purposes only. Make sure that no one
accidentally supplies power to the machine, lock
the mains switch in the OFF position.
In order to guarantee that the unit runs regularly and efficiently, it is
necessary to schedule an overall inspection at regular intervals to
prevent malfunctions which could damage the main machine
components.
EVERY 6 MONTHS
• Check the gas charge.
• Check that there are no gas leaks.
• Check the power consumption of the unit.
• Check the functioning of the differential water pressure switch.
• Bleed any air from the water system.
• Check the contactors on the electric panel.
END OF SEASON with unit switched off:
• Check the state of cleanliness of the air-side heat exchanger.
• Drain the water system.
• Inspect and, if necessary, tighten the electrical contacts and
terminals
33
SECTION II: INSTALLATION AND MAINTENANCE