Rinnai COMBI i060C, Installation And Operation Manual, Page: 83 / 136

Rinnai I-Series Condensing Boiler Combi Manual 83
Thermostat Usage (Default Setting)
This is the default setting for the boiler. This setting enables the boiler to operate in CH from a call
for heat from the room thermostat or zone controller.
In this setting, the Central Heating button is not functional except as an Error Reset or other setting.
Central Heating Button
This setting enables the boiler to operate via the Central Heating
button being active (illuminated).
While the Central Heating button is ON, the boiler operates
continuously or until the return sensor on the boiler gives the signal to
cycle off. The burner fires up only when supply or return water
temperature reduces. This setting should be disabled when CH is no
longer seasonally needed.
To select Thermostat Usage or the Central Heating button, follow the steps below:
1. Remove the boiler’s front panel by removing the four screws that secure the panel.
2. Locate the PC Board (lower left side of unit). Locate the DIP switches on the PC Board (see
below).
3. Adjust DIP switch 2 to one of the following positions

ON - Central Heating button used. Boiler fires based on return water temperature

OFF (Default) - Thermostat Used
4. Press the CH button on the controller display. The boiler is now in CH mode.
Central Heating
button
ON
OFF
DIP Switches PC Board
Pump Linkage with CH Mode On
When CH Mode is active, Parameter 41 becomes available. Parameter 41 enables a system pump to
be linked with the boiler pump. When Parameter 41 is selected as “b,” the two pumps will run at the
same time.
Parameter
Number
Setting Description
Selection
A b
Linked Operation Between Main Boiler Pump and CH Pump 1
No
Yes (Linked
Together)
This parameter is only in use when DIP switch 2 is in the ON
position. This enables the linked operation between the main
boiler pump and CH pump 1. For example, when the main
pump is on, pump 1 is also on. When DIP switch 2 is in the
OFF position, the pumps are automatically linked.