Installation Introduction
I. Site Preparation
When a suitable installation location is identified, you will need to determine if the system will be mounted
horizontally as recommended, or vertically if necessary (if mounting vertically, the outlet will need to be at
the top and a TRV is required). Allow adequate space for the ongoing maintenance and pre-plan the
plumbing so that the ports will be facing up.
II. Mounting
When mounting the system on a wall, mark out the approx. location of each wall bracket. Fix a bracket to
the wall and using a level and ruler, mark out the appropriate location for the second bracket. Brackets
should ideally have the pivot/hinge at the bottom and screw to close the bracket at the top. Hold the
Chamber in firmly to the brackets and they do up one of the clamps to secure the system. A second set of
hands can assist to make this easier.
III. Installing Connections
The UV systems are manufactured with male BSP threads either in 1” (GT7-8K/9K/16K) or ½” (GT7-4K).
The smaller GT7-2K unit is ¼” Female. Use appropriate plumbing fittings to install onto the chamber for
adapting to your plumbing.
IV. Thermal Relief Valve
A Thermal Relief Valve is a valve with a build in sensor that will open and drain water once the temperature
in the chamber reaches 56°C.
A Thermal Relief Valve is also recommended on installations where there can be prolonged periods of time
without water flow. Generally lower wattage systems (<40W) do not reach extreme temperatures under
normal conditions; however, it is best to install a TRV to limit the temperature.
When installing a TRV, note the below requirements:
•
The TRV must be installed on the Outlet of the UV System (which should be the open end).
•
The TRV tube must be allowed to drain freely without head pressure (don’t run the tubing vertically).
•
The TRV operates from temperature so always have the ports facing up (heat rises).
•
When vertical system installation is required, make sure the valve itself is also facing up.
The valve will open at 56°C and Close at ~ 54 – 55°C, if you have a pump without a bladder and a very
sensitive high/low pressure switch, you may notice the pump cycling as the valve activates/deactivates
during prolonged periods without flow.
V. Filter Protection
As per Australian Plumbing Codes, a pressure limiting valve should be installed to limit the pressure to 500
kPa when the feed pressure exceeds 500 kPa. If Water Hammer is present, install a suitable Water
Hammer Arresting device.
Commissioning & Start-up
I. Quartz Thimble Installation
Due to the fragile nature of the quartz, care must be taken when handling and installing the thimble and
lamp. The below steps are for horizontal installations.
1. Remove the knurled nut from the end of the SS chamber.
2. Wearing clean gloves or handling with a micro-fibre cloth, remove the thimble from the packaging
and check for any marks or blemishes. Insert the glass thimble into the
chamber at the open end. The thimble will need to go into the chamber
by the domed end first. At the rounded end of the UV SS chamber, you
will find a locating port to accommodate the dome end of the quartz tube
(On the GT7-8K/9K System, this will be a spring). Carefully push the
quartz thimble into this port so the lamp is securely seated.