Rinnai E50CRN Manuel D'installation page 18

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NOTICE
Water filter figure 8
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11. If the installation is a zone system be sure to purge out each zone individually
12. Close the auto feed on the system (F1)
13. Close the return side purge station (BD2) and disconnect the hose (H3).
14. Open the main valve on the system return (V3)
15. Close the bypass valve below the boiler (V4).
16. Open shutoff valves on both the supply and return connections below the boiler
(V1 and V2).
17. Clean out the dirt trap
18. Test the pH of the water that will be used for filling the system
19. Test the water hardness of the water that will be used for filling the system
20. Use the proper water treatment to ensure the pH and water hardness are within
the Rinnai boiler water quality guidelines
21. The boiler and system may now be filled.
The following is a list of approved system cleaners, inhibitors, and antifreeze.
Approved antifreeze:
• Rhomar RhoGard Mutli-Metal (AL safe)
• Noble Noburst AL
Approved system cleaner:
• Noble Noburst Hydronic System Cleaner
• Rhomar Hydro-Solv 9100
The system cleaners from NoBurst, Rhomar, and Fernox are NOT to be used in
the boiler. The boiler must be closed off (valved off) from the rest of the system
or not connected while the cleaners are in the system. The system should then
be drained and then thoroughly flushed with clean water to remove all the
system cleaner.
Approved inhibitors:
• Rhomar Pro-tek 922
• Noble Noburst AL inhibitor
- Connect the expansion tank to the system. See chapter 6.2.
- Connect the pipes so that they are free from strain.
The boiler has a self-adjusting and self-protecting control system for the load and the
pump capacity. By this means, the temperature difference between the supply and return
water is checked and controlled.
If the installation resistance is over the stated value; the load will be adjusted until
an acceptable temperature difference between supply and return water has been
obtained. If, after this, the temperature difference is still not acceptable then the boiler
will switch off and wait until an acceptable temperature has arisen.
If an unacceptable temperature is detected, the control will repeatedly try to achieve
water flow over the boiler. If not the boiler will switch off.
As standard the boiler is provided with a water filter in the return pipe of the boiler,
so that debris from the central heating water is prevented from affecting the boiler.
• Sentinel X500
• Fernox Alphi 11
• Fernox F3 Cleaner
• Sentinel X400
• Sentinel X100