Ferroli RXA 11.1, Инструкция по установке и эксплуатации

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START UP
Messa in funzione
The following operations must be carried out only by properly trained personnel. To make the contractual warranty effective, start
up must be carried out by authorized service centres .
Before calling the service centre it is advisable to make sure that all the installation steps have been completed (positioning, elec -
trical connections, hydraulic connections).
Preliminary checks before turning on
1. Verify that :
- the unit has not suffered visible damages due to transport or positioning
- the unit is placed on an horizontal surface able to bear its weight
- the minimum operating area are respected
- the ambient conditions comply with the provided operating limits
- the hydraulic and electrical connections has been carried out correctly
2. Disconnect the unit power suply line at the start and make sure that :
- the unit power supply line complies with the regulations in force
- the screws, fastening the electrical cables to the components inside the electrical panel of the unit, are well tightened (vibra -
tions during transport phases could have caused some loosening)
3. Connect the unit power supply line and verify that :
- the voltage of the power supply line complies with the the nominal one of the unit
- for three phase power supply units, the unbalance between the phases is lower than 2% (a higher value produces an excesive
current input on one or more phases causing possible damages to the electrical components of the unit)
NOTE
. Example of phase unbalance calculation
- Read the value of the three line voltages using a voltmeter :
line voltage between phases L
1
and L
2
: V
1-2
= 390 V
line voltage between phases L
2
and L
3
: V
2-3
= 397 V
line voltage between phases L
3
and L
1
: V
3-1
= 395 V
- Calculate the difference between the maximum and minimum value of the measured line voltages :
Δ V
max
= max ( V
1-2
; V
2-3
; V
3-1
) - min ( V
1-2
; V
2-3
; V
3-1
) = V
2-3
- V
1-2
= 397 - 390 = 7 V
- Calculate the average line voltage value :
Δ
average
= ( V
1-2
+ V
2-3
+ V
3-1
) / 3 = ( 390 + 397 + 395 ) / 3 = 394 V
- Calculate the percentage unbalance value :
Δ V
max
/ V
average
x 100 = 7 / 394 x 100 = 1,78 % < 2 %
Turning on
Turn on the main switch of the unit (ON position).
A wrong sequence of the power supply phases is immediately detected by the phase sequence controller (standard on all the
three phase power supply units) and reported on the display of the unit. To eliminate the error switch each other two phases of
the power supply line.
Start all the plant components necessary to guarantee an adequate water flow rate on the plant hydraulic circuit.
Activate the unit in cooling or in heating mode operating on the user interface and setting a set point suitable to require the unit
to work.
Checks and adjustments after turning on
Make sure that :
- there are no refrigerant leakages (all the caps of the pressure connections must be fitted and screwed down)
- the saturation temperature (dew point) corresponding to the condensing pressure is about 10-15°C higher than the outdoor air
temperature in cooling and about 5°C higher than the water outlet temperature in heating
- the saturation temperature (dew point) corresponding to the evaporating pressure is about 5°C lower than the water outlet
temperature in cooling and about 5-10°C lower than the outdoor air temperature in heating
- the superheating and the subcooling are between 5°C and 10°C
- the compressor outlet temperature is 30-40°C higher than the saturation temperature (dew point) corresponding to the con -
densing pressure
- the difference between the water inlet and outlet temperature from the plate heat exchanger of the unit is inside the limits pro -
vided, as indicated in the section "Technical data and performances"
- the current absorbed by the compresor and the fans is lower than the maximum value admitted (FLA), as indicated in the
section "Technical data and performances"
N .B . The reported values are reference values, to be considered only for units operating with water flow rate and temperatures
similar to the nominal ones.