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OPERATION
Wiring
All wiring must conform to local and national electrical codes and ordinances.
Connect in accordance with the wiring diagrams provided by the equipment manufacturer. If none are
provided, the following represents a typical installation.
Limit
Switch
Fan
Switch
Fan
Motor
Optional Remote
Manual Switch
For Summer Fan
Jumper
Factory Installed
On Some Models
To Oil Burner
Control Or
Transformer Primary
Diagram Using Limit In Line Voltage Circuit
L1
Line
L2
Note:Make L1 “HOT” on
120V installation
Limit
Switch
Fan
Switch
Fan
Motor
Optional Remote
Manual Switch
For Summer Fan
To Low Voltage
Or Millivolt
Burner Circuit
Diagram Using Limit In Low Voltage
or Millivolt Circuit
L1
Line
L2
Note:Make L1 “HOT” on
120V installation
CAUTION: Line voltage jumper is factory installed on
some models. This jumper must be removed
when limit switch is used in low voltage or
millivolt circuit.
SUMMER FAN OPERATION
The cover does not have to be removed to access the
lever. To turn the fan on, slide the lever to the left “MAN”
position. To turn the fan off, slide the lever to the right
“AUTO” position.
For automatic operation of the fan during the heating or
cooling season, the lever must be in the “AUTO” position.
SETTING THE DIAL
To set pointers, hold dial securely with one hand and
move the pointers with the other hand. Do not force the
pointers past any stops on the dial even though the dial
may be graduated beyond the stops.
Limit
Move the right hand pointer so that its straight edge
indicates the temperature at which the contacts should
open. The limit pointer should never be set any higher
than the setting recommended by the furnace manufac-
turer.
Fan
Move the “Fan On” pointer so that its straight edge
indicates the temperature at which the fan contacts should
close to start the blower. Move the “Fan Off” pointer so that
its straight edge indicates the temperature at which the
fan contacts should open to stop the blower.
5
0
1
0
0
1
5
0
2
0
0
2
5
0
3
0
0
FAN LIMIT
HOLD DIAL WHEN
CHANGING INDICATORS
DO NOT ADJUST
SAFETY STOP
Left Hand
Pointer
(Fan Off)
Center
Pointer
(Fan On)
Right Hand
Pointer
(Limit Opens)
Limit Stop
MAN
AUTO