Outdoor Reset Connection; Outdoor Reset Curve Temperature Guidelines - Rinnai I Series Installation And Operation Manual

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).
3. Connect the outdoor sensor to the terminals shown below using minimum 18 AWG wiring to the two
terminals provided in the enclosure.
4. Locate the DIP switches on the PC Board (see below). Ensure that DIP switch 1 is in the OFF (Default)
position (this ensures the boiler will operate based on the outdoor temperature).
5. Set parameters 01 - 03 as appropriate for your application (see Parameter Settings Table for more
information).
PC Board
IMPORTANT
If DIP switch 1 is set to the OFF (default) position, and the wire harness to the
outdoor sensor is disconnected, then error code E393 will display. While the E393
error is displayed, the boiler will operate under the setting temperature control.
Below are some typical target temperatures for various heat emitters. These are basic guidelines; thus,
the emitter manufacturer or consult your heating design engineer.
Note: If temperatures lower than 104°F are necessary, a mixing valve may be needed in the system.
Type of Heat Emitter
Hydronic Air Handler
Unit Heater
Base Board Convectors
Cast Iron/Panel Radiator
Undermount Radiant
90
OFF
Typical Minimum Supply Temperature
120 - 140°F
130 - 140°F
100 - 140°F
90 - 120°F
100 -120°F
Rinnai I-Series Condensing Boiler Combi Manual
DIP switch 1 in OFF (Default) position
Typical Maximum Supply Temperature
Outdoor
Temperature Sensor
check with
140 - 180°F
160 - 180°F
140 - 180°F
140 - 180°F
120 - 150°F