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5-1 COMMISSIONING CHECKS
It is the responsibility of the installer to ensure that the OSO Dualstream System is properly commissioned.
5-1.1 Commissioning Procedure
1.
Check Accumulator pressure is between 1 and 1.5 bar below the pressure reducing valve setting
(Minimum 0.5 bar 7 PSI).
2.
Check that the Tundish is correctly installed to conform to the Building Regulations.
3.
Check that all pipe connections are tight and that no joints have been left unsoldered.
4.
Check that ALL drain cocks are closed.
5.
Check that ALL wiring connections have been made.
6.
Check that the required earth continuity conductors have been fitted.
7.
Check that the Immersion Heater has its cover fitted.
8.
Check that a Scale Protection device or Water Softener has been fitted according to manufacturers instructions.
9.
Open all shut off valves.
10. Turn on Mains Stop Cock and allow the system to fill.
11. Open all domestic taps in turn to purge air.
12. Check the system for leaks including around the Immersion Heater.
13. Check that no water is passing through the Expansion Relief Valve or the Pressure and Temperature Relief
Valve, this will be evident at the Tundish.
14. Test the operation of the Pressure and Temperature Relief Valve by turning the Cap to the left and ensure that
the water flows freely and safely to waste.
15. Test the operation of the Expansion Relief Valve by turning the Blue Cap to the left and ensure that the water
flows freely and safely to waste.
16. Set Cylinder Thermostat at required temperature between 50°C and 70°C.
The Boiler and heating system should be checked before continuing.
17. Set Motorised Valve to manual, open and allow the heat coil to fill.
18. Set the Motorised Valve to Auto.
19. Switch on the heating system.
20. Wait for the system to heat up.
21. Check temperature of tap water.
22. Check operation of Cylinder Thermostat. When turned down below tank temperature the Motorised Valve
should close. When turned up above tank temperature the Motorised Valve should open.
23. Check for leaks again when the system is up to temperature.
5-2 HANDING OVER
Having filled in the Guarantee Form, this should be sent to OSO Hotwater (UK) Ltd. The Installer should next
recheck the system and ensure it is completely satisfactory before demonstrating to the householder. The
householder should be aware of the following:
1.
How to set the temperature of the tap hot water.
2.
The function of the Pressure and Temperature Relief Valve and Expansion Relief Valve and that overpressure
may cause steam and scalding water to be emitted from the discharge pipe.
3. The Tundish is supplied as a visual identification for overpressure or temperature relief.
4. The procedure to follow in the event of overpressure. Refer to 2-4.
This manual and supplements must be left with the householder.
COMMISSIONING 5
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