Rinnai E75CN User Manual

Page 43

Installation & Servicing Instructions Rinnai E-Series

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
attack 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 ae listed in the

Rinnai Boiler Applications Manual.
Additives in the installation water are not permitted.

9.2 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;

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 up;

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

15 Close the filling loop;

16 Press the ‘STEP’-button;

17 Be sure that the filling loop is closed.

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 working pressure of the installation should be between 22 and 25 PSI when the
system is cold.

NOTICE

WARNING

This manual is related to the following products:

E75CP