Condensing Water Heater Service Manual 56
KB Series Dip Switch Settings
KB Series Condensing
RU80i, RU80e, RU98e, RU98i
0-2000 ft
(0-610 m)
2001-5200 ft
(610-1585 m)
5201-7700 ft
(1585-2347 m)
7701-10200 ft
(2347-3109 m)
#2: OFF #2: OFF #2: ON #2: ON
#3: OFF #3: ON #3: OFF #3: ON
SW1 Bank
SW2 Bank (present on replacement PC boards only)
1
OFF - Propane Gas
ON - 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)
1
OFF - “Long Flue”
ON - “Short Flue” and Outdoor Models
2
Settings dependent on altitude
3
4 OFF (Air Handler)
5
OFF - 120ºF fixed temperature without a controller
ON - 140ºF fixed temperature without a controller
6
7 OFF (Units in standby with EZConnect™)
8 OFF
“Long flue” is defined as:
0 elbows and length is greater than 21 ft
1 elbow and length is greater than 15 ft
2 elbows and length is greater than 9 ft
* RU80i, RU80e, RU98e, RU98i models
have a default maximum temperature of
120º F (49º C) and an option to increase
the maximum temperature to 140 ºF (60
ºC). Temperature settings from 125-140
ºF (52-60 ºC) are available by setting dip
switch 6 to ON in the SW1 bank of 8 dip
switches.
OFF - 120ºF maximum temperature
without an MCC-91-2 controller
ON - 140ºF maximum temperature
without an MCC-91-2 controller
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