{
"@context": "https://schema.org",
"@type": "HowTo",
"name": "Installation Procedure for Blue Cold Condensing Unit - Refrigerant Charging Method",
"description": "Comprehensive engineering field manual outlining the physical placement, refrigeration piping connections, and wiring sequence for Condensing Unit - Refrigerant Charging Method.",
"totalTime": "PT4H",
"estimatedCost": {
"@type": "MonetaryAmount",
"currency": "USD",
"value": "0"
},
"step": [
{
"@type": "HowToStep",
"url": "https://www.bluecoldref.com/installation-procedure/refrigerant-charging-method#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/refrigerant-charging-method#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/refrigerant-charging-method#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/refrigerant-charging-method#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."
}
]
}
The compressor is supplied with oil. Check the “OIL Line” mark.
Create the vacuum from both the high and low-pressure side. (If it is possible to create the vacuum from one side only, take sufficient time at the high-pressure side and check that the prescribed vacuum gas has been created). This will ensure that air and above all, humidity contents are below the permitted values. In any case, the target value is a pressure not higher than 5 Pa.
Important: In order to avoid irreparable damage to the compressor, never start it in vacuum conditions and the gas charge.
Always charge the refrigerant from the high-pressure side (condenser) of the unit. Do not use the refrigerant charger which has been used for HCFC or CFC.
To charge the refrigerant correctly, we recommend that, after setting the vacuum, you pump part of the refrigerant into the compressor to “break the vacuum”. Then start the compressor so that it sucks up the residual part of the refrigerant.
For the correct calculation of the gas charge, connect gauges to the pressure inlets (already fitted). Pressure value must be compatible with the operating conditions of the machines.
Important: Mixtures of refrigerating gas must be charged into the system in their liquid state only.
