Lithium Bromide Central Air Conditioning Cleaning, Maintenance & Service

Unit Maintenance Scope

• Vacuum level testing and maintenance: Detect non-condensable gas content and perform vacuum evacuation treatment;
• Lithium bromide solution adjustment: Test concentration, pH value, and corrosion inhibitor content; replenish and adjust as needed;
• Unit internal cleaning: Remove corrosion products and deposits from cavity inner walls;
• Heat exchange tube cleaning: Restore heat exchange efficiency;
• Component inspection: Check and maintain vacuum pumps, canned motor pumps, valves, etc.

Solution Treatment Technology

Mastery of core lithium bromide solution adjustment and regeneration technology. Through filtration, conditioning, and corrosion inhibitor addition, solution performance is restored and unit service life is extended. This can save 50-70% in costs compared to replacing with new solution.

Common Faults and Troubleshooting

• Reduced cooling capacity: Check vacuum level, solution concentration, and heat exchange tube scaling;
• Solution crystallization: Adjust cooling water temperature, check concentration;
• Corrosion issues: Check corrosion inhibitor content and pH value;
• Vacuum degradation: Check seals and vacuum pump performance.

Lithium Bromide Chiller Maintenance FAQ

Q1: How often does a lithium bromide chiller need solution servicing?

At least once a year is our minimum for a unit running through a full cooling season. The check covers vacuum tightness and non-condensable gas, solution pH and inhibitor content, corrosion products on the cavity walls, and the condition of the heat-exchange tubes. Conditioning the existing solution instead of replacing it restores performance and typically saves 50% to 70% of the cost of a full charge change. Machines showing crystallisation, falling cooling capacity or rising vacuum loss need attention sooner than the annual interval. A test report with the adjusted parameters is issued after every service by Danyang Lanxing Anticorrosion Cleaning Co., Ltd.

Q2: What causes loss of cooling capacity in a lithium bromide absorption chiller?

Three causes dominate and they are distinguishable on site. Vacuum degradation comes first: air or non-condensable gas in the shell raises the evaporating pressure and cuts the chilling effect, usually traced to seals or the vacuum pump. Solution problems follow, with strength drift, pH out of range or spent inhibitor, which also accelerates corrosion of the shell and tubes. Fouling on the heat-exchange tubes is third, showing up as a widening approach temperature. We measure vacuum level, solution parameters and tube condition before proposing anything, because cleaning tubes on a machine with a vacuum leak fixes nothing. The responsible cause is reported in writing by Danyang Lanxing Anticorrosion Cleaning Co., Ltd.

Q3: Can the solution and tubes be cleaned on site without removing the unit?

Yes. Solution conditioning, cavity cleaning and heat-exchange tube cleaning are all done in place, with the machine staying in the plant room and no major rigging required. After isolation we test the solution, filter and adjust it, restore inhibitor content, clean the cavity walls, pass the tubes, then re-establish vacuum and verify performance against commissioning data. Because the solution is recovered rather than dumped, the work also avoids the cost and waste handling of a full charge replacement. Scope is confirmed after a vacuum and solution survey by Danyang Lanxing Anticorrosion Cleaning Co., Ltd.