Rinnai COMBI i060C, Installation And Operation Manual, Page: 70 / 136

70 Rinnai I-Series Condensing Boiler Combi Manual
IMPORTANT

On initial startup of the system, it is necessary to put the boiler into a deaeration process to
remove all air from the system piping and boiler. Failure to properly deaerate the boiler
and system may result in damage to the boiler, which is not covered by the boiler
warranty.

It can take up to a week before all the air has disappeared from a newly-filled and
pressurized installation. During the first week of operation, noises can be heard which
indicate the presence of air. The automatic air vent in the boiler and air separator in the
heating system will remove the air, which means the water pressure will reduce some
during this period; therefore, additional water is necessary to maintain proper pressure in
the heating system. Water pressure needed for operation:

The boiler is in normal operation between 17 - 26 PSI (1.2-1.8 bar).

Below 7 PSI
(
0.5bar
)
, the boiler will have an error code (E430 diagnostic code will be
present on the controller display) and will not operate. Increasing the heating system
water pressure is necessary for operation.

Between 7 - 13 PSI (0.5-0.9bar), operation will be limited (E430 diagnostic code will be
present on the controller display).

The maximum pressure permitted inside the heat exchanger is 45 PSI (3.0bar).

The pressure relief valve supplied with the boiler is rated to 30 PSI (2.1bar).
Topics in this section

Start-Up Information

Control Panel

Basic Operation Settings

Parameter Settings

Outdoor Reset Control

DHW Recirculation Function

Simultaneous CH and DHW Operation

Diagnostic Codes

Forced Hi/Low Fire Modes
12