Rheem RKKB SERIES Owner's Manual page 4

UNIT FEATURES & BENEFITS—RKKB/RKMB/RKNB- SERIES
Inside the control box ( ), each electri-
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cal component is clearly identified with
a label that matches the component to
the wire diagram for ease of trouble
shooting. All wiring is numbered on
each end of the termination and color-
coded to match the wiring diagram. The
integrated furnace control, used to con-
trol furnace operation, incorporates a
flashing LED troubleshooting device.
Flash codes are clearly outlined on the
unit wiring diagram. The control trans-
former has a low voltage circuit breaker
that trips if a low voltage electrical short
occurs. There is a blower contactor
and compressor contactor for each
compressor.
For added convenience in the field, a
factory-installed convenience outlet and
disconnect ( ) are available. Low and
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High voltage can enter either from the
side or through the base. Low-voltage
connections are made through the low-
voltage terminal strip. For ease of
access, the U.L.-required low voltage
barrier can be temporarily removed for
low-voltage termination and then rein-
stalled. The high-voltage connection is
terminated at the high-voltage terminal
block. The suggested mounting for the
field-installed disconnect is on the exte-
rior side of the electrical control box.
To the right of the electrical and filter
compartment are the externally
mounted gauge ports, which are perma-
nently identified by embossed wording
that clearly identifies the compressor
circuit, high pressure connection and
low pressure connection (
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gauge ports mounted externally, an
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). With the
accurate diagnostic of system operation can be performed
quickly and easily.
The blower compartment is to the right of the gauge ports and
can be accessed by removing 5/16" washer-head screws. This
panel is not hinged to assure a water-tight fit with the unit. To
allow easy maintenance of the blower assembly, the entire
assembly easily slides out by removing two 3/8" screws from the
blower retention bracket. The adjustable motor pulley (
easily be adjusted by loosening the bolts on either side of the
motor mount. Removing the bolts allows for easy removal of the
blower pulley by pushing the blower assembly up to loosen the
belt. Once the belt is removed, the motor sheave can be adjusted
to the desired number of turns, ranging from 0 to 6 turns open.
Where the demands for the job require high static, Rheem has
high-static drives available that deliver nominal airflow up to 2" of
static. By referring to the airflow performance tables listed in the
installation instructions, proper static pressure and CFM require-
ments can be dialed in. The scroll housing (
provide quiet and
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efficient airflow.
The blower
sheave is secured
by an "H" bushing
which firmly
secures the pulley
to the blower shaft
for years of trou-
ble-free operation.
The "H" bushing
allows for easy
removal of the
blower pulley from
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the shaft, as
opposed to the
use of a set screw, which can score the shaft, creating burrs that
make blower-pulley removal difficult.
4
) can
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) and blower scroll
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