{
"@context": "https://schema.org",
"@type": "HowTo",
"name": "Installation Procedure for Blue Cold Condensing Unit - Startup Precautions",
"description": "Comprehensive engineering field manual outlining the physical placement, refrigeration piping connections, and wiring sequence for Condensing Unit - Startup Precautions.",
"totalTime": "PT4H",
"estimatedCost": {
"@type": "MonetaryAmount",
"currency": "USD",
"value": "0"
},
"step": [
{
"@type": "HowToStep",
"url": "https://www.bluecoldref.com/installation-procedure/startup-precautions#step1",
"name": "Unpacking and Structural Mounting",
"text": "Inspect the unit chassis for shipping damage. Verify mounting point dimensions and lift the unit into place using structural hangers or support channels capable of handling the operating weight."
},
{
"@type": "HowToStep",
"url": "https://www.bluecoldref.com/installation-procedure/startup-precautions#step2",
"name": "Refrigeration Piping & Brazing",
"text": "Route copper suction and liquid lines ensuring a continuous slope toward the compressor. Flow dry nitrogen through the lines while brazing joints to prevent internal oxide scaling."
},
{
"@type": "HowToStep",
"url": "https://www.bluecoldref.com/installation-procedure/startup-precautions#step3",
"name": "Pressure Leak Testing and Evacuation",
"text": "Pressurize the system with dry nitrogen to the target design pressure and hold for 24 hours. Once leak-free, evacuate the system using a dedicated vacuum pump down to a deep vacuum below 500 microns."
},
{
"@type": "HowToStep",
"url": "https://www.bluecoldref.com/installation-procedure/startup-precautions#step4",
"name": "Electrical Connection and Pre-Commissioning",
"text": "Connect the main three-phase power lines and link control sensors to the digital thermostat board. Verify fan rotation direction before introducing refrigerant."
}
]
}
Never start the Unit when no refrigerant is charged.
All service valves must be in the open position.
Check compliance between Unit and power supply.
Check that the crankcase heater is working.
Check that the fan can rotate freely.
Balance the HP/LP pressure.
Energize the Unit, it must start promptly. If the compressor does not start, check wiring conformity, voltage on terminals and sequence phase.
Eventual reverse rotation of a 3-phase compressor can be detected by the following phenomena: Unit doesn’t start, the compressor doesn’t build up pressure, it has abnormally high sound level and abnormally low power consumption. In such case, shut down the Unit immediately and connect the phases to their proper terminals.
If the rotation direction is correct, the low-pressure gauge shall show a declining pressure and the high-pressure gauge shall show an increasing pressure.
