English
31SysAqua
14.2. OPERATING CHECK LIST
14.2.1. GENERAL
Cheek for any unusual noises or vibration in the running components.
14.2.2. PHASE ROTATION PROTECTION
If the phase of the power supply are not correct, the phase rotation protection device will prevent the
machine from starting.
14.2.3. ELECTRICAL
14.2.3.1. SET POINTS
1. Compressors circuit breaker settings.
2. Pump Circuit Breaker and Fan Circuit breaker settings.
NOTE : The outdoor fan motor is equiped with an internal safety device with automatic reset.
14.2.3.2. OPERATING VOLTAGE
Recheck voltage at unit supply terminals.
14.2.3.3. CONTROL
1. Verify that on/off switch and pump 1/2 switch works perfectly.
2. Check unit is wired for correct control of unit fan, cooling and heating modes.
3. Verify all sensor values available with the ILTC display.
14.2.4. COMPRESSOR AND REFRIGERATION SYSTEM
1. Running check: Start the compressor. Check for any unusual noise or vibration.
2. Operating Pressures: Operate the unit for at last 20 minutes and ensure that the refrigerant pressures
are stabilised, and cheek that they are within the normal operating ranges.
3. Operating Temperature: Check discharge, suction and liquid temperatures.
4. Discharge temperature on cooling cycle should normally not exceed 115°C.
5. Suction superheat should be 6K ±2K.
14.2.5. HYDRAULIC CIRCUIT
The unit must work with a water ow rate in agreement with recommended values displayed in the table
§ PHYSICAL CHARACTERISTICS, page 9. Running the unit with a low water ow is dangerous, as it could
result in irreversible damage to the components as well as to the plate exchanger. If the unit is run with
insufcient ow, its performance will not be optimum.
1. Check the lter's cleanliness
2. Check the presence and position of the stop valves to isolate the unit during maintenance periods
3. Adjust the water ow to specications. (see graphs appended).
Check pressure at the inlet and outlet of the plate exchanger
Determine the water ow using a owmeter or the load loss of the plate exchanger
4. Check the installation is protected against frost (heat insulation, glycol ethylene percentage of the
unit if its presence is necessary...)
5. Check that the bleeder present in the unit has actually been opened.
To Next Page
Loading...
Need help?
General
