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Unit clearances
to front
to floor/ground
Indoor
to Combustibl s
model
inches (mm)
RUR98i
Top of Heater
6 * (152)
Back of Heater
Front of Heater
Sides of Heater
Ground/Bo om
Vent
* 0 inches from vent components and condensate drain
line.
The clearance for servicing is 24 inches in front of the
water heater.
For closet installatio , clearance is 6 inches (152 mm from
the front.
Outdoor
to Combustibl s
model
inches (mm)
RUR98e
Top of Heater
Back of Heater
Front (panel)
Front (exhaust)
Sides of Heater
Ground/Bo om
The clearance for servicing is 24 inches in front of the
water heater.
10
to top
to side
to Non-
Combustibl s
inches (mm)
2 *(51)
0 (zero)
0 (zero)
6 (152)
6 (152)
2 (51)
1/2 (13)
12 (305)
12 (305)
0 (zero)
0 (zero)
to Non-
Combustibl s
inches (mm)
12 (305)
2 (51)
0 (zero)
0 (zero)
24 (610)
0 (zero)
24 (610)
24 (610)
6 (152)
1/8 (3.2)
12 (305)
2 (51)
Freeze Protectio
Make sure that in case of freezing weather the water
heater and its water lines are protected to prevent
freezing. Damage due to freezing is not covered by
the warranty.
Loss of freeze protec on may result in water damage
from a burst heat exchanger or water lines.
With electrical power supplied, the water heater will
not freeze when the outside air temperature is as cold
as –22°F (-30°C) for indoor models or is as cold as –4°F
(-20°C) for outdoor models, when protected from
direct wind exposure. Because of the "wind-chill"
e ect, any wind or circula on of the air on the unit
will reduce its ability to freeze protect.
The unit may be drained manually. However, it is
highly recommended that:
drain down solenoid valves be purchased and
installed that will automa cally drain the unit if
power is lost. These are available in a kit,
104000059. (The condensate trap drain plug,
water drain plug, and pump drain plug are not
aff cted by the auto drain down solenoid valves
and will have to be manually opened.)
a surge protector with terminals be purchased
and installed which allows the solenoid valves to
operate if the unit is disabled due to a diagnostic
code. This is available as 104000057.
In addi on, the solenoid valves should be connected
electrically to a surge protector with terminals. This
allows the solenoid valves to operate if the water
heater is disabled due to a diagnostic code.
The freeze protecti n features will not prevent the
external piping from freezing. It is recommended that
hot and cold water pipes be insulated. Pipe cover
enclosures may be packed with insula on for added
freeze protecti n.
It is recommended that the condensate trap drain line
be insulated. A frozen condensate trap drain line
results in diagnostic code 25.
In the event of a power failure at temperatures below
freezing, the water heater should be drained of all
water to prevent freezing damage. In addi on, drain
the condensate trap, drain line, and pump drain.
KBP Series Manual
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