7.3 Start-up sequence
Unit ON power supply
1.
compressor crankcase heaters operating at least since 8 hours
2.
off-load
v
oltage measure
3.
phase sequence check
4.
pump manual start-up and fl
o
w check
5.
shut-off
v
alve refrigerant circuit open
6.
unit ON
7.
load voltage measure and absorptions
8.
liquid sight glass check (no bubbles)
9.
measure return and supply water temperature
10.
measure super-heating and sub-cooling
11.
check no anomalous vibrations are present
12.
climatic curve personalization
13.
climatic curve personalization
14.
scheduling personalization
15.
complete and available unit documentation
7.4 Refrigeration circuit
1. Check carefully the refrigerating circuit: the presence of oil stains can mean leakage caused by transportation, movements or other).
2. Verify that the refrigerating circuit is in pressure: Using the unit manometers, if present, or service manometers.
3. Make sure that all the service outlets are closed with proper caps; if caps are not present a leak of refrigerant can be possible.
4. Open the valves of the refrigerant circuit, if there are any.
7.5 Water circuit
1. Before realizing the unit connection make sure that the hydraulic system has been cleaned up and the cleaning water has been drained.
2. Check that the water circuit has been filled and p essurized.
3. Check that the shut-off alves in the circuit are in the “OPEN” position.
4. Check that there isn’t air in the circuit, if required, evacuate it using the air bleed valve placed in the system high points.
5. When using antifreeze solutions, make sure the glycol percentage is suitable for the type of use envisaged.
Neglecting the washing will lead to several fil er cleaning interventions and at worst cases can cause damages to the exchangers and the
other parts.
Weight of glycol (%)
10
20
30
40
Freezing temperature (°C)
-3.9
-8.9
-15.6
-23.4
Safety temperature (°C)
+1
-4
-10
-19
7.6 Electric Circuit
Verify that the unit is connected to the ground plant.
Check the conductors are tightened as: the vibrations caused by handling and transport might cause these to come loose.
Connect the unit by closing the sectioning device, but leave it on OFF.
Check the voltage and line frequency values which must be within the limits: 400/3/50 +/- 10%
Check and adjust the phase balance as necessary: it must be lower than 2%
Example
Working outside of these limits can cause irreversible damages and voids the warranty.
26
Содержание MSE-XSC3 100.4
Страница 1: ...MSE XSC3 90 4 160 4 Installation and operating manual...
Страница 3: ...Index of contents 1 4 2 6 3 8 4 10 5 14 6 18 7 26 8 35 9 47 10 52 11 53 12 54 57 3...
Страница 19: ...Connections performed by the Customer 19...
Страница 50: ...9 15 Compressor replacement 50...
Страница 51: ...9 16 Exchanger replacement 51...