220736A,B INTERNAL AUXILIARY SWITCHES
5 63-2228—03
WIRING
Disconnect all power supplies to de-energize
auxiliary switch before servicing.
All wiring must comply with local codes and
ordinances. Do not exceed switch ratings of auxiliary
switches.
Fig. 2. Auxiliary switch wiring diagram.
SETTING AND ADJUSTMENTS
Auxiliary Switches
The auxiliary switches are spdt switches that are actuated by
adjustable cams. The cams are factory mounted on the motor
shaft at the power end of the motor. The settings of the cams
determine the point in motor shaft rotation at which the
auxiliary equipment will be switched on or off. These cams
can be set to actuate the switches at any angle within the
stroke of the motor. All TRADELINE motors include auxiliary
switch cams which permit installation of this auxiliary switch kit
(220736A, 220736B).
NOTE: When the slow-rise portion of the cam is used, the
switching differential is approximately 10° of rotation.
When the fast-rise portion of the cam is used, the
switch differential is approximately 1° of rotation. Do
not use the fast rise portion of the cam if fast cycling
of auxiliary equipment is undesirable.
Auxiliary Switch Adjustment
Procedure
Fire or explosion hazard. Can cause severe injury
or death.
When auxiliary switches control combustion
equipment, incorrect wiring of the switches can allow
the burner to come on at high fire. Check auxiliary
switch wiring and cam adjustment before turning on
the system. Watch the controlled equipment through
one complete cycle. Shut the system down
immediately if switches do not correctly sequence the
equipment.
1. Live circuits are exposed during auxiliary switch
adjustment procedure. Always turn off power before
adjusting switch cams.
2. Do not turn motor shaft by hand or with wrench as
damage to the motor can result.
NOTE: The following instructions are for normally closed
motors (motor shaft rotates clockwise, as viewed
from the power end of the motor, on an increase in
signal).
Additional instructions may also be found in the Auxiliary
Switch Adjustment section in the specification sheet included
with the Modutrol IV Motor.
Review Table 4 and Fig. 3 before adjusting cams. Table 4
applies to both the left and right switches.
To turn the cams, insert a small screwdriver (1/8" or
3 mm blade) through wiring box into slot on cam and move the
screwdriver at the top. Refer to Fig. 3. Each division on the
cam represents 15° of motor rotation.
Table 4. Auxiliary switch position with motor shaft rotated to either side of auxiliary switch operating point,
as viewed from power end.
LEFT SWITCH
(OUTER CAM)
RIGHT SWITCH
(INNER CAM)
PURPLE
RED
ORANGE
PURPLE/BLACK
RED/BLACK
ORANGE/BLACK
1
1
WIRING SHOULD BE NEC CLASS 1 UNLESS POWER SUPPLY MEETS
CLASS 2 REQUIREMENTS. TAPE UNUSED LEADS. MAKE CERTAIN
THE CURRENT DRAW OF THE EXTERNAL CIRCUIT IS LESS THAN
CONTACT RATING OF SWITCH.
SWITCH LEADS ON 220736A SINGLE-SWITCH KIT SAME AS LEFT
SWITCH ABOVE.
COLORS ARE TRACERS ON BLACK BACKGROUND.
M418C
2
3
1
2
3
Motor type
Cam
arrangement
Switch
differential
Auxiliary switch contact positions
N.O. contact (red and purple
leads)
N.C. contact
(red and orange
leads)
Shaft rotated
CCW of switch
operating point
Shaft rotated
CW of switch
operating point
Shaft rotated
CCW of switch
operating
point
Shaft rotated
CW of switch
operating
point
All other TRADELINE
motors
Blue inner cam,
red outer cam
1° Open Closed Closed Open
10° Closed Open Open Closed
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