12 replenishing the central heating system – Rinnai Q175SN User Manual

Page 12

Operating instructions Rinnai Q-Series

Replenishing the central heating system

The central heating installation needs to be filled with potable (drinking)

water. For topping up the installation you use the filling loop according to the

following procedure:

Contact your installer if your installation is not

provided with a filling loop.

1 Switch all functions off (heating, DHW and pump);

2 Briefly push the 'STEP'-button: P x.x = water pressure in PSI;

3 Slowly open the filling loop (Indication on display increases);

4 Fill up slowly to between 16 and 18 PSI;

5 STOP appears on the display;

6 Close the filling loop;

7 De-aerate the complete installation , start at the lowest point;

8 Check the water pressure and if necessary top it up;

9 Close the filling loop;

10 Activate functions required (heating

, DHW and/or pump );

11 If A xx appears on the display, wait for 17 minutes;

12 Check the waterpressure and if necessary top it up to 16 to 18 PSI

13 Close the filling loop;

14 Press the ‘STEP’-button;

15 Be sure that the filling loop is closed.

After the automatic de-aeration programm (A xx) is finished the boiler will

return to the

Good reading or Technical reading.

NOTICE