Installation Instructions
Poly-fusion welding
Welding is carried out heating simultaneously the male and female parts to be joined together.
Once the welding temperature is reached, coupling is carried out to obtain a tight joint .
The process is indicated overleaf in diagram form.

Preliminary operations
The surfaces of the pipes and fittings must be clean and without blemish. Ends must be clean cut at right angles. Before carrying out welding, check that the poly-fusion device operates correctly and that it reaches the required welding temperature.

Pipe and fitting are inserted to the edge of the matrix and held steady without rotating Once the heating has been completed the parts are extracted from the heating element and rapidly jointed axially. So as not to create an excessive seam, it is important to follow the correct coupling depth without going beyond the ledge on the fitting.

Welding by means of electric coupling
The electric coupling is used mainly for repairs in existing plants.
The welding procedure is simple and safe, only a few basic rules have to be respected.
The parts to be joined must be clean, free of grease and perfectly aligned . after inserting the parts to be welded in the coupling , the coupling has to be electrically connected to the welding machine . Select the diameter to be welded and start the machine.
The entire welding process will be performed automatically.
Warning Notes
Threaded joints
To ensure tightness, Teflon or similar products can be used though not in excessive quantities.
Conical threads are not suitable.
Exposure to UV- rays
The product should not be stored or installed in places where it is directly exposed to ultraviolet rays.
Transport and handling
The product should always be handled with care avoiding any impact , deformation or nick .
Law temperature
At temperature below 0 C following precautions have to be taken:
- pay attention when cutting the pipe,
- Avoid impacts and excessive strains as well as too many bends.

In case of air streams the welding has to be carried out in sheltered areas so as to prevent stresses in the weld joint.
Large bends can be obtained by cold forming. if the bend radius is shorter than 8 times the diameter of the pipe it is recommended to heat up the part concerned by means of a hot air blower the use of a flame is strictly forbidden .
Cutting should be carried out using tools which ensure a clean out without burrs and perpendicular to the axis.
Testing of the planet
Checks to be carried out on the finished plant
Make sure that the plant is sound, free from stresses or casual breaks. The testing relates to piping lengths up to100 mt. each. Therefore, in case of longer piping, the plant has to be divided into sections.

Filling of plant
The pipeline shall be filled with clean water at ambient temperature. Any air lock has to be eliminated. The pump will be installed in the lowest point of the plant.

Preliminary test
Pressure : 25 Bar
Time      : 1 hour

Main test
Immediately after the preliminary test, the main test has to be carried out . The pressure in the plant is set to 15 bar and kept for 24 hours. There must be no leaks of any kind whatsoever, not even in the form of moisture.
The plant must be perfectly tight. On completion of the test, it is recommended to drain the plant, especially when ambient temperature is below 0 c.Important remark:
An increase in ambient temperature during the test will cause a pressure drop in the plant. As a guideline, an increase of 10c will originate a pressure drop of about 0.5- 1 bar.

Installation methods and advice
Basically, the installation of the Masters system does not differ from the installation of a metallic piping .

Masters can be installed without problem in any existing plant made of different material ,e.g. in case of repair or renovation works .

The customary calculation methods laid down by the standards are used for the design   of the plant .

All components normally available on the market , such as valves , taps ,fasteners, insulating materials , can be fitted as usual.

To prevent the forming of condensate ,the hot water lines shall be installated above the cold water lines.

Air locks in the piping are to be avoided.

The piping should be assembled starting from the lowest part of the plant and moving   towards the tapping point .

In the riser arrange for compensating devices on the top and drainage devices at the   bottom.

Large plants have to be divided into sections by means of insolating valves .

The rapid flushes have to be connected directly to the riser .