Rinnai Circ-Logic RU80e, Service Manual

Page: 27 / 60

Condensing Water Heater Service Manual 27
KB Series Component Replacement Instructions
1.Turn off 120v power supply.
2.Turn off gas supply.
3.Turn off water supply.
4.Remove the four screws securing the front panel.
Remove front panel.
Altitude
Dip
Switch #2
Dip
Switch #3
0
-
2000 ft (0
-
610 m) OFF OFF
2001
-
5200 ft (610
-
1585 m) OFF ON
5201
-
7700 ft (1585
-
2277 m) ON OFF
7701
-
10200 ft (2277
-
3109 m) ON ON
SW1
Tan Switches
1
ON for short vent length*
OFF for long vent length and outdoor models*
2
See altitude table
3
4 OFF* (Air Handler)
5 OFF* (Fixed Temperature without controller
-
120°F/140°F)
6 OFF* (Max temperature
-
120°F/140°F)
7 OFF* (Units in standby with EZConnect™)
8 OFF
SW2
White Switches
1
OFF for Propane Gas
ON for Natural Gas
2 OFF* (Optional Temperature table)
3 OFF* (Optional Temperature table)
4 OFF* (Recirculation
-
pump)
5 OFF
6 ON for RU80
OFF for RU98
7 OFF
8 OFF* (Recirculation
-
insulation)
* These are specific for the water
heater installation. Copy the
settings on the old PC Board or refer
to the manual for details on these
switch settings. Default is OFF.
RU80i/e, RU98i/e
5.Remove two screws connecting the PC board to the
cabinet of the water heater.
6.Pull out PC board and remove the connectors.
7.Adjust the dip switches on the new PC board (see
below).
8.Install PC board attaching all connections. Secure with
two screws.
9.Calibrate the low and high fire pressure settings.
(Reference the section KB Series Gas Pressure
Setting Procedure and KB Series Manifold Gas
Pressure Settings ).
PC Board