Start-Up; First Start - Emerson Liebert CRV User Manual

Start-up

7.0 S
TART-UP
7.1 First start-up (or after long standstill)
TO PREVENT COMPRESSOR DAMAGE THE CRANKCASE(S) MUST BE PREHEATED FOR
AT LEAST 4 HOURS BEFORE CONDITIONER START-UP (FAILURE TO DO SO INVALID-
ATES THE GUARANTEE).
Start the air conditioner as follows:
1. Open all valves in the refrigeration circuit according to the instruction label attached to the
valve.
2. W only: Open all valves in the water circuit according to the instruction label attached to the
valve.
3. Ensure that the refrigerant charge is correct (see Chap. 4).
4. Using a leak detector, verify that there are no refrigerant leaks. If there are any, then repair
the leak and recharge as described in Chap. 4.
5. At least 4 hours before start-up, close the main switch and the miniature circuit breaker for
transformers' protection on the electrical panel.
In the "iCom" control system factory setting the stand alone mode is standard. The stand alone
mode gives the possibility of turning on the unit simply rotating the main switch on the electric
panel. The yellow LED on the iCom case will light after turning on the unit, because of the
presence of electric power.
If the LED does not light up:
S check the electric panel power supply;
S check the protection devices (e.g.: thermal switches);
S check the fuses.
6. Verify the operation of the crankcase heater.
7. With Electronic Expansion Valve option. The battery is normally charged enough by the sup-
plier to pass properly the production test.
In case the unit has been left for a long period without power the level of charge could be re-
duced further.
If after Power ON the iCOM control should generate the "EEV1/2 Battery failure" warning,
please wait approx 24h before changing the battery; this will give necessary time for recharge;
if after this period the warning event is still present, replace the battery with a new one.
8. Check that there are no water leakages.
9. If an external condenser or Dry cooler is installed, start it by supplying power to it.
10.Close all MCBs on the electrical panel.
11.Check the supply voltage on all phases.
12.Check the supply voltage on all phases for the external condenser or Dry cooler, if fitted.
13.ENSURE THAT THE COMPRESSOR HAS BEEN PREHEATED FOR AT LEAST 4 HOURS
BEFORE STARTING THE UNIT.
14.Start the unit by pressing ON OFF.
15.Check the electrical absorption of all components (see Chap. 6).
16.Check the electrical absorption of the external condenser/Dry cooler, if fitted.
17.IMPORTANT - If the compressor makes a loud and unusual noise IT IS NECESSARY
TO INVERT the electrical connections of the phases supplying the corresponding
scroll compressor, which accepts only one direction of rotation.
18.Ensure that the fans rotate in the correct direction (see arrow on fan).
CAUTION: risk of contact with rotating devices.
19.Ensure that all control system settings are correct and that there are no alarms (see Control
manual).
20.W only: Verify the water flow.
21.W only: For closed circuit units ensure that the water pump starts when the compressor
starts.
22.Once the system is operating under load, check the various components, as follows:
S Verify that the fans are operating properly.
S Ensure that the temperature and relative humidity are being controlled, and that the
humidifier (optional) and heating steps (optional) operate when required.
S Ensure that the compressor operates when required.
S Ensure that the fan operation controller on the external condenser/Dry cooler (if fitted)
is calibrated correctly, and that it controls the fan operation.
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Start-up