CLEAN BURN CB-1400, Руководство оператора

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Operator's Manual: Model CB-1400
A-10
Fan Limit Control
Understanding the Operation of the Fan Limit Control
The fan limit control senses air temperature within the furnace cabinet. This control contains two switches: the
limit switch and the fan switch.
Fan Switch: The fan switch is normally open and provides power to the fan. When the fan limit
control senses "Fan On" temperature, the fan switch closes and starts the fan. When the wall thermostat is
satisfied and the burner shuts off, the fan continues to run until the fan limit control senses the "Fan Off" tempera-
ture. At this temperature, the fan switch opens and shuts off the fan.
NOTE: The fan limit control has a white fan switch button. Make sure the white button is pulled OUT for
automatic (normal) operation. When the button is pushed in (manual setting), the fan will run
continuously.
Limit Switch: The limit switch is normally closed
and provides power to the oil primary control on
the burner. If the fan limit control senses 200
degrees F, the limit switch opens
and shuts off power to the oil primary control and
the burner stops running. The fan continues to run.
Once the fan limit control senses 170 degrees F, the
limit switch automatically resets and restarts the
burner.
NOTE: It is very important to avoid cycling
the burner on hi limit as described above. If
the hi limit activates, immediately check and
re-adjust burner settings.
ATTENTION: DO NOT change the fan limit
settings from the specified settings, or severe
damage to the furnace cabinet may occur.
To Set Pointers on the Fan Limit Dial
1. Turn OFF main power to the furnace.
2. Remove the fan limit control cover.
3. While holding the dial securely in place
with your thumb, move the pointer to
the desired setting.
ATTENTION: DO NOT rotate the dial when
setting the pointers. This severely damages the
control.
Fan Limit Control Settings: CB-1400
Fan Off: 100
Fan On: 120
Limit: 200
FIGURE A5 - Fan Limit Control Components
50
100
150
200
250
CAUTION
DO NOT ROTATE
HOLD DIAL WHEN SETTING
POINTERS
FAN OFF
(LEFT POINTER)
FAN ON
(MIDDLE POINTER)
LIMIT
(RIGHT POINTER)
I88840
CAUTION
DO NOT ROTATE
HOLD DIAL WHEN SETTING
POINTERS
250 50
150
100 200
FAN
LOAD
LINE
LINE
LIMIT
LOAD
ORA
N
G
E
W
IR
E
(CONNE
CT
T
O F
A
N
)
RE
D
W
IR
E
(
C
O
NNE
C
T
T
O LI
M
IT
)
TO RELEASE
WIRE, PUSH
SCREWDRIVER
IN AND PULL
WIRE OUT
BLACK WIRE
BRASS
JUMPER