90 Rinnai I-Series Condensing Boiler Combi Manual
Type of Heat Emier Typical Minimum Supply Temperature Typical Maximum Supply Temperature
Hydronic Air Handler 120 - 140°F 140 - 180°F
Unit Heater 130 - 140°F 160 - 180°F
Base Board Convectors 100 - 140°F 140 - 180°F
Cast Iron/Panel Radiator 90 - 120°F 140 - 180°F
Undermount Radiant 100 -120°F 120 - 150°F
Below are some typical target temperatures for various heat emiers. These are basic guidelines; thus, check with
the emier manufacturer or consult your heang design engineer.
Note: If temperatures lower than 104°F are necessary, a mixing valve may be needed in the system.
1. Remove the boiler’s front panel by removing the four screws that secure the panel.
2. Locate the PC Board (lower le 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)
posion (this ensures the boiler will operate based on the outdoor temperature).
5. Set parameters 01 - 03 as appropriate for your applicaon (see Parameter Sengs Table for more
informaon).
Outdoor
Temperature Sensor
OFF
DIP switch 1 in OFF (Default) posion
IMPORTANT
If DIP switch 1 is set to the OFF (default) posion, 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 seng temperature control.
PC Board