Rinnai Q130SN - Manuel (Page 48)

Installation & Servicing Instructions Rinnai Q-Series
48
Freeze protection
Freeze protection for new or existing systems must use glycol that is specially formulated
for this purpose. This includes inhibitors, which prevent the glycol from attacking the metallic
components. This should be for multi-metallic components.
Make certain to check that the system fluid is correct for the glycol concentration and
inhibitor level. The system should be tested at least once a year and as recommended by
the producer of the glycol solution.
Use only Rinnai approved inhibitors. See the Rinnai Boiler Applications Manual for
an approved list of inhibitors.
Use only inhibited propylene glycol solutions, which are specially formulated for
central heating systems. Ethylene glycol is toxic and can attack gaskets and seals
used in the boiler and system. Approved glycols are listed in the Rinnai Boiler
Applicatons Manual.
Additives in the installation water are not permitted.
10.2 Filling the heating system
For filling or topping up the installation you use the filling loop according to the following
procedure:
1 Switch on the power supply;
2 The display will show FILL;
3 All functions off (heating , DHW and pump );
4 Push briefly the 'STEP'-button: P XX (XX = water pressure in PSI);
5 Open the filling loop (Indication on display increases);
6 Fill up slowly to 22 to 25 PSI (1.5 and 1.7 bar);
7 STOP appears on the display;
8 Close the filling loop;
9 De-aerate the complete installation, start at the lowest point;
10 Check the water pressure and if necessary top it off;
11 Close the filling loop;
12 Activate the functions in use (heating , DHW and/or pump );
13 If A XX appears on the display, wait for 17 minutes;
14 Check the water pressure and if necessary top it up to 22 to 25 PSI (1.5 and 1.7 bar)
15 Close the filling loop;
16 Press the ‘STEP’-button;
17 Be sure that the filling loop is closed.
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After the automatic de-aeration program (A XX) is finished the boiler will return to
the Good state or Technical read out.
Check the water pressure regularly and top off the installation when necessary.
The typical working pressure of the installation should be between 22 and 25 PSI (1.5
and 1.7 bar) when the system is cold.
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