Chilled water pipe and condenser pipe leakage and condensation

Chiller frequently unloading (stop-start); Compressor not starting

Corroded parts of condenser – Face plate, tubes

Leaking of motor valve

Probable causes for the defect

  • Damaged mechanical seal of valve from wear and tear.
  • Not fitted properly after servicing, usually if access is difficult.
  • Poor workmanship at the socket joint during installation.

Design

Conform to the pump system’s design’s calculation and required outputs as per ISO 13612-1. (SS 652: F.1.2.1) 

Specify the provision of flow meters for chilled/condenser water loops. (SS 652: F1.2.3) 

Specify the use of unplasticised PVC pipes for cold water services/industrial use as per SS 141 (see also ISO 1452-1).

Construction

Ensure proper workmanship during pipe installation and testing, especially at joints. (SS 652: F.6.1.3.1)

Perform proper insulation of chilled water pipes to avoid condensation. (SS 652: F.6.1.3.2)

Install primary-only variable flow chilled water pumping systems in accordance with SS 564-1 or equivalent (SS 652: F.6.1.3.3).

Maintenance

Conduct quarterly check for pitting noise in pumps. Avoid harsh cleaning methods that may damage pipes or cause the thinning of pipes. (SS 652: F.11.1.3.1)

Prepare maintenance checklist for flow meters (ultrasonic and full-bore magnetic in-line types) in accordance with SS 591, ISO 12242 or equivalent. (SS 652: F.11.1.3.2).

Check the integrity of the insulation to prevent condensation