SYSTEMP – Installation Operation Manual (IOM SYSTEMP rev.N)
Table Of Contents
- WARRANTY CONDITIONS
- 1 DESCRIPTION OF UNITS AND OPERATING LIMITS
- 2 TRANSPORTATION, POSITIONING AND INSTALLATION PROCEDURES
- 3 PLENUMS, VENTILATED PLENUMS AND DUCT SECTIONS (ACCESSORY)
- 4 FREE COOLING PLENUM (ACCESSORY)
- 5 ADJUSTABLE AND VENTILATED PLINTHS (ACCESSORY)
- 6 TMC AIR-COOLED CONDENSER PLACEMENT AND INSTALLATION
- 7 CONNECTION OF CONDENSATE DISCHARGE AND HUMIDIFIER
- 8 WATER CIRCUIT CONNECTIONS
- 9 COOLING CONNECTIONS
- 9.1 ROUTING OF THE COOLING CIRCUIT PIPES
- 9.2 COOLING CIRCUIT SIZING
- 9.3 COOLING CIRCUIT INSTALLATION
- 9.4 UNIT COOLING PIPE CONNECTION
- 9.5 AIR-COOLED CONDENSER CONNECTION
- 9.6 COOLING CIRCUIT VACUUM DRYING OPERATIONS
- 9.7 CHARGING THE COOLING CIRCUIT
- 9.8 PRECAUTIONS
- 9.9 LUBRICATING OIL FILLING IN THE CIRCUIT
- 9.10 TMC CONDENSER PRESSURE REGULATOR (ACCESSORY)
- 9.11 CHECKING THE REFRIGERANT LOAD AND COOLING CIRCUIT OPERATION
- 9.12 PRECAUTIONS AGAINST REFRIGERANT LEAKS
- 9.13 CHECKING THE MAXIMUM CONCENTRATION OF REFRIGERANT
- 10 EXAMPLES OF WATER AND COOLING CIRCUITS
- 10.1 EXAMPLE OF CHILLED WATER CIRCUIT
- 10.2 TMC AIR-COOLED CONDENSER COOLING CIRCUIT
- 10.3 COOLING CIRCUIT WITH SINGLE COMPRESSOR AND REMOTE CONDENSER
- 10.4 COOLING CIRCUIT WITH SINGLE COMPRESSOR AND WATER-COOLED CONDENSER
- 10.5 COOLING CIRCUIT WITH DOUBLE COMPRESSOR AND REMOTE CONDENSER
- 10.6 COOLING CIRCUIT WITH DOUBLE COMPRESSOR AND WATER-COOLED CONDENSER
- 10.7 TWO SOURCES WATER CIRCUIT WITH CHILLED WATER CIRCUITS
- 10.8 TWO SOURCES COOLING CIRCUIT WITH SINGLE COMPRESSOR AND REMOTE CONDENSER
- 10.9 TWO SOURCES COOLING CIRCUIT WITH SINGLE COMPRESSOR AND WATER-COOLED CONDENSER
- 10.10 TWO SOURCES COOLING CIRCUIT WITH DOUBLE COMPRESSOR AND REMOTE CONDENSER
- 10.11 TWO SOURCES COOLING CIRCUIT WITH DOUBLE COMPRESSOR AND WATER-COOLED CONDENSER
- 10.12 COOLING CIRCUIT WITH FREE COOLING AND SINGLE COMPRESSOR
- 10.13 COOLING CIRCUIT WITH FREE COOLING AND DOUBLE COMPRESSOR
- 11 ELECTRICAL CONNECTIONS
- 11.1 RS485 SERIAL COMMUNICATION BOARD CONNECTION (Modbus RTU - BACnet MS/TP)
- 11.2 ETHERNET RJ45 PORT CONNECTION (Modbus TCP - BACnet IP - Web Server)
- 11.3 CANbus LAN CONNECTION (ACCESSORY)
- 11.4 REMOTE CONTROL TERMINAL CONNECTION (ACCESSORY)
- 11.5 WALL-MOUNTED TEMPERATURE AND HUMIDITY PROBE CONNECTION (ACCESSORY)
- 11.6 DUCTED TEMPERATURE AND HUMIDITY PROBE CONNECTION (ACCESSORY)
- 11.7 CONNECTION OF THE SMOKE AND FLAME DETECTORS SUPPLIED (ACCESSORY)
- 11.8 WATER DETECTION PROBE CONNECTION (ACCESSORY)
- 11.9 CONNECTION OF FREE COOLING PLENUM MOTORISED DAMPER ACTUATORS (ACCESSORY)
- 11.10 AIR-COOLED CONDENSER POWER SUPPLY AND REGULATION CONNECTION (ACCESSORY)
- 12 ROUTINE AND SPECIAL MAINTENANCE
- 13 DEACTIVATION, DISMANTLING AND DISPOSAL
- 14 APPENDIX 1: RECOMMENDED EQUIPMENT
- 15 APPENDIX 2: PRELIMINARY CHECKS AND FIRST START-UP
- 16 APPENDIX 3: FAULT DIAGNOSIS
- 17 NOTES
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9.5.3 PRECAUTIONS FOR BRAZING
RISK OF BURNS!
Burn hazard during cooling circuit brazing procedures!
WARNING!
Check the nitrogen ow during brazing. If brazing is performed without using nitrogen, a strong layer
of rust will develop inside the pipes, which may damage the valves and compressor and hinder the unit
from operating correctly.
When performing brazing while feeding nitrogen into the pipe, the nitrogen must be regulated with a
pressure reduction valve at 0.2 Bar (20 kPa) (just sucient to be felt on the skin).
Use a suitable nitrogen pressurisation brazing kit and proceed as follows:
1) Connect the kit to the circuit as shown in the picture below.
2) Open the nitrogen feed cocks.
3) Ensure the nitrogen feeding pressure does not exceed 0.2 Bar (20 kPa).
4) If necessary protect the components with a damp cloth to prevent overheating.
5) Proceed with heating the pipe section with an oxyacetylene welding torch.
6) Add welding material until weld is completed by capillarity.
A Cooling lines
B Spot requiring brazing
C Insulating tape
D Manual valve
E Pressure reduction valve
F Nitrogen
G Nitrogen cylinder
9.5.4 SEAL TEST OF THE COOLING CIRCUIT WITH NITROGEN PRESSURISATION
Once the cooling circuit is completed, a verication of soldered joints and union ttings by way of nitrogen pressurisation
is recommended.
Use a suitable nitrogen pressurisation circuit test kit and proceed as follows:
1) Connect the kit to the circuit.
2) Open any cocks and/or solenoid valves on the circuit.
3) Ensure no circuit sections can remain isolated.
4) Open the nitrogen delivery valve.
5) Reach test pressure for R410a systems, shown on the suitable kit pressure gauge. The recommended pressure is between
40 and 42 Bar (4 - 4.2 MPa):
• If the pressure does not reach this value, this means that there is a leak in the circuit.
• If it reaches the recommended pressure, maintain it for at least one hour. The test is considered a success if, in such a
period of time, there is no decrease in pressure. Otherwise, it means there is a leak in the circuit.
6) Should a leak be found, proceed with the repair and repeat the previous operations, otherwise proceed with vacuum drying
operations of the cooling line (see the next chapter).
Kit for nitrogen pressurisation test
B C
A
D E
G
F