Start-Up Procedure - Trane CGCN Installation Operation & Maintenance

Start-up procedure

Unit start up (only by an authorized person)
1. With the switch closed, open the electrical panel and exclude compressor (refer to the wiring diagram on the
unit). Close the panel, set switch to "ON" (to give power to the unit)
2. Wait for the start of the microprocessor and control. Make sure that the temperature of the oil is hot enough.
The oil temperature must be at least 5 ° C higher than the saturation temperature of the refrigerant inside the
compressor.
3. Place the unit in the "ON" and wait until the unit is indicated on the display-On
4. Turn the pumps (if with inverter) at max speed.
5. Verify that the loss of load of the evaporator is equal to that of the project and correct if necessary. The loss
must be recorded attacks on the charge placed on the evaporator piping and supplied as standard. Do not
measure the load losses in points where they are interposed any valves and / or filters.
6. Check for air in cleaning Filters, and then draining the system.
7. Return the pump to the factory setting
8. Turn off the power (into standby mode) and make sure the pumps stop after about 2 minutes
9. Verify that the local temperature set point is set to the required value by pressing the Set button
10. Turn the main switch to "OFF". Open the cabinet. Reactivate the compressors. Push in the picture. Turn the
main switch to "ON" (to give power to the unit).
11. Wait for the start of the microprocessor and control. Just put in "ON" circuit # 1
12. When the compressor is started, wait about 1 minute for the system begins to stabilize.
13. Check the pressure of evaporation and condensation of refrigerant.
14. Verify the start of the cooling fans in function of raising the condensing pressure chiller mode, with decreasing
evaporation pressure in Recovery, fans still in recovery chiller mode more.
15. Verify that, after a period of time necessary for the stabilization of the refrigerant circuit, the liquid indicator
placed on the inlet pipe to the expansion valve is completely filled (no bubbles), and that the moisture indicator
signs 'Dry'. The passage of bubbles within the liquid indicator, it may indicate a low amount of refrigerant, or an
excessive pressure drop through the filter drier, or an expansion valve blocked at the maximum opening position.
16. In addition to checking the sight glass, check the operating parameters of the circuit controlling:
a) Overheating compressor suction
b) Overheating compressor discharge
c) Subcooling of the liquid exiting the condenser coils
d) Evaporation pressure
e) Condensing pressure
Measure the values of pressure and temperature instrumentation suitable vehicle with various points indicated
and make comparison by reading the corresponding values directly on the display of the microprocessor on
board.
17. Repeat steps 11 to 16 for the second circuit.
18. To temporarily turn off the unit (turn off daily or weekend) put on standby the unit key, or open the remote
contact (terminals shown in the wiring diagram on board unit) of the terminal X (Installing a remote switch by the
customer ), or set time zones. The microprocessor will activate the shutdown procedure that will take a few
seconds. Two minutes after switching off the compressor will turn off the microprocessor / pump and / e. Do not
remove the main power to not turn off the electrical resistances of the compressor and the evaporator.