RACA Journal June 2016 - Page 83

When quality matters Continued from page 79 4 To make matters even worse, the wall thickness of Armoflex insulation must not be minimised to avoid condensation. Below are some photos explaining what can happen if the wall thickness of Armoflex has been minimised. 1 2 5 3 Cable ties, however, are NOT designed to secure insulated refrigerant piping by supporting or keeping the suction and discharge line cabled together. What can be used? 1 & 2: Cable ties cause extreme damage to Armoflex insulation and therefore must not be used to secure refrigerant piping. 3 & 4: Condensation evident on cable ties, and Armoflex insulation saturated 5. Damage to the galvanised threaded rod that damaged the armoflex and galvanic corrosion caused between the hanger rod and the copper piping. www.hvacronline.co.za Through various projects, Velcro straps have been tried and successfully used to neatly and correctly secure refrigerant piping. This experiment was started and done by a well-known HVAC contractor Alex Anderson, owner of Delta-T Air Conditioning. Over a period of two years, samples were obtained from various HVAC contractors where Velcro straps were used successfully. Continued on page 83 RACA Journal I June 2016 81