Q-FLEX TECHNICAL DATA
WATER SYSTEM DESIGN: POINTS TO CONSIDER
WATER HEATER CONNECTION
All installations must be in accordance with the AS/NZS 3500. As per the standard, it is mandatory that a metallic pipe (copper) be installed for one meter from any hot water unit. This is to allow any steam or excessive hot water to be dissipated from the system. It is recommended by Veltanium Plus that isolation valves be installed together with no-n-re turn valves to protect the hot water service from any backflow and make installation of a replacement hot water service simpler when required. Veltanium Plus PN20 pipes may be used for re-circulating hot water systems provided the installation guidelines are adhered to. Veltanium Plus PN16/12.5 pipes may not be used for re-circulating hot water systems but may be used for non-re-circulating systems. Veltanium Plus recommends that only appliances with temperature control devices which can, at all times, restrict the outlet water temperature to within the Veltanium Plus piping system’s capabilities be installed in conjunction with Veltanium Plus piping systems. Heat trace wire may be used to a maximum temperature of 50°C. If the piping system needs to be shut down and drained, please ensure that the heat trace wire is turned
and void the Veltanium Plus warranty.
SOLAR WATER HEATERS & OTHER WATER HEATERS WITH UNCONTROLLED ENERGY SOURCES
Solar collectors and other uncontrolled heat sources generally have operating conditions which exceed the specification of the Veltanium Plus piping systems. ■ Never use Veltanium Plus pipes in the flow and return piping to any solar collectors/panels. ■ Do not install Veltanium Plus pipes in the flow and return of any uncontrolled heat source (e.g. wood fire heaters, etc.). As per AS/NZS 3500 requirement, polymer pipe systems must never be used on the flow and return piping to any solar panel.
SUITABILITY OF PIPE FOR HOT WATER DELIVERY
Heat Trace Maximum Temp 50 ° c
Non Re-Circulated
Solar/ Uncontrolled
Re-Circulating
✓
✓
✓
X
PN20 – Pex-A – 16mm
✓
✓
✓
X
PN20 – Pex-A – 20mm
✓
✓
✓
X
PN20 – Pex A – 25mm
✓
✓
✓
X
PN20- Pex-A – 32mm
11
Technical Guide
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