6
MAINTENANCE - Brushes
Your 850/850-XL dryer has 2 brush-type motors. The brushes should be checked for wear after approximately 600 hours of
use. If the carbon brush is worn shorter than ¼”, the brushes should be replaced. Brushes may be ordered from
Double K
Industries
or an Authorized Service Center. Please be sure to specify whether your dryer is an 850 or 850-XL as the brushes
are slightly different.
To Check and/or Replace Brushes:
(a)
Unplug electrical cord from wall outlet.
(b)
Detach your front plate by loosening the
fastening screws.
(Fig. 1)
.
(c)
Remove front plate and set aside (motors and brushes are now visible and accessible).
(Fig. 2)
.
(d)
Find the flag connector on the top of the brush assembly. There is a wire leading to this connector.
(e)
Place a
flathead screwdriver with a fine tip between the flag connector and the plastic brush housing.
(f)
Rock the screwdriver back
and forth and gently wedge the flag connector out of the brush assembly.
(g)
Loosen the two brush assembly retainer
bracket screws.
(h)
Remove the brush assembly.
(i)
Replace the brush assembly with the new one, making sure that the
small tab on the bottom is fitted onto the corresponding slot on the motor frame.
(j)
Replace the brush assembly retainer
bracket and tighten the screws which hold it in place.
(k)
Attach the flag connector to the new brush in the same position
as the previous brush.
(l)
Repeat these steps for the brush on the other side of the motor.
16-GA GREEN 8”
MOTOR WIRE WHITE
MOTOR WIRE BLACK
MOTOR WIRE WHITE
MOTOR WIRE BLACK
CORD WIRE WHITE
16-GA GREEN 8”
14-GA WHITE 16”
14-GA BLACK 6”
12-GA BLACK 15”
14-GA WHITE 15”
5539
5537
5537
9015
8000
8000
851A
5531
852
876
876
9015
9015
9015
9015
5539
SWITCH
CORD
WIRE
GREEN
CORD
WIRE
BLACK
881
CORD
819-XL OR 866 REG
MOTOR
819-XL OR 866 REG
MOTOR
654
654
1
2
P.C.
BOARD
CORD
INDICATOR
LIGHT
MOTOR
MOTOR
SWITCH
TRIAC
POT
CONTROL
VARIABLE
SPEED
OFF
STANDARD
SPEED
818
854
852
852
9005
5537
5539
9015
9015
8000
8000
5539
5539
BLACK
BLACK
BLACK
GREEN
GREEN
GREEN
BLACK
BLACK
BLACK
BLACK
WHITE
WHITE
WHITE
WHITE
WHITE
BLUE
BLUE
BLUE
BLUE
BLACK
GREEN
YELLOW
GREY
RED
GREEN
FIG. 1
FIG. 2
Detail A
Place Screw Driver Tip Between Clip and
Plastic Brush Body. Rotate to Separate Tab
from Brush.
Flag Connector
Brush Assembly
Brush Assembly
Retainer Bracket
Brush Retainer
Bracket Screw
Filter Cleaning
The filters of the
850/850-XL Challengair Forced Air Dryer
should be kept clean. If the filters become heavily
coated with hair and/or dirt, the air output of your dryer could be reduced and motor damage could occur.
Never operate the dryer without filters in place.
To clean the internal filters
:
(a)
Unplug dryer.
(b)
Remove the fastening screws from the dryer back plate.
(see fig. 3)
(c)
Remove the dryer back plate and set aside.
(d)
Remove individual motor filter discs on the back
of each motor by turning and pulling filter off motor. (See fig.4)
(e)
Clean motor filter discs by vacuuming off
hair and dirt or wash filters gently in cool water and allow to air dry completely.
(f)
Replace filter discs on
motor by pushing in place and turning to secure.
(g)
Replace dryer back plate and fastening screws securely.
Any maintenance or service not explained in this manual should be performed by
Double K Industries
or
an authorized service center. Call
Double K Industries
for the name of the service center nearest you. All
warranty service must be performed by an Authorized Service Center to protect your warranty status.
3
OPERATION - SWITCHES AND CONTROLS:
1.
Standard Speed
- The standard two-speed unit has two toggle switches. Each switch operates one of the
two motors in your dryer. You may use just one motor for low air or turn on both switches for high air
volume. “ON” is in the up position and “OFF” is down.
2.
Variable Speed
- This unit has a dial speed control and a three-position toggle swich. Center position of the
toggle switch is “OFF”. The down position of the switch is full power, the up position of the toggle switch
activates the variable speed control knob which allows the dryer to run at lower air volumes by turning the
knob counter-clockwise and higher by turning clockwise. The indicator light will glow when the dryer is in
variable speed mode.
To Control Lower Air Outlet
: Turn the black control knob counter-clockwise to close the lower outlet and
clockwise to open the outlet.
*NOTE: The upper outlet is open
at all times.
**NOTE: Stand Dryers Only... If
you wish to do only hose drying
with the highest possible air
flow, the arm extension on the
upper air outlet may be removed
by loosening the black thumb
nuts at the base of the arm. A
hose may then be used in the
upper air outlet with the bottom
outlet turned off.
Standard Speed
Variable Speed
ON/OFF toggles
for both motors
Air Outlet
Control Knob
Upper Air Outlet
Lower Air Outlet
LED Indicator light
HIGH/OFF/VARIABLE
Variable Speed
Control
FIG. 4
WIRING DIAGRAM - VARIABLE SPEED
WIRING DIAGRAM - STANDARD SPEED
Internal Motor Filters
(part # 868)
External Motor Filter
(part # 817)
(Attached with Velcro
disc - part # 5538)
FIG. 3
