Recirculation Mode; To Enable Recirculation - Rinnai I Series Installation And Operation Manual

To enable recirculation:

1. Remove the boiler's front panel by removing the four screws that secure the panel.
2. Adjust DIP switch 3 to the ON position.
3. Select the appropriate parameter settings from Parameters 12-15 for the system.
See Parameter Setting instructions for instructions on adjusting parameters.
PC Board
Parameter
Number
DHW Recirculation piping setup
This parameter is available when Dip SW 3 is in the ON position.
12
This sets the DHW recirculation piping mode, which controls the circula-
tion logic. Ensure this corresponds to the DHW recirculation piping.
DHW Recirculation with timer relay input
This parameter is available when Dip SW 3 is in the ON position.
13
This enables an external timer to also control the timing for DWH recir-
culation to more directly correspond to the customers needs.
CH temperature limitation during Simultaneous Operation
This parameter is available when Dip SW 3 or 4 are in the ON position.
This enables the CH temperature setting to be limited during simultane-
14
ous DHW and CH operation. This can prevent unintentionally supplying
high temperature DHW to low temperature CH applications.
During simultaneous operation, supply temperature may be up to 180°F.
When selecting "NO" limitation, ensure that the CH system and heating
application is designed for this temperature.
3 Way Valve Position During Simultaneous Operation
This parameter is available when DIP switch 3 or 4 is in the ON position.
This adjusts the 3 Way Valve position to open the CH side more for when
15
the flow of the CH side is reduced due to DHW demand. This may restrict
the DHW capacity.
Rinnai I-Series Condensing Boiler Combi Manual
Function/Description
DIP Switches
Push the PCB
Button Switch
4 (Red button)
to move to
Setting Mode.
ON
Selection
A
b
(Default)
Crossover Dedicated
Valve Return
Yes No
Yes No
Normal Additional CH
95