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Honeywell Pressuretrol L404 Series Manual page 7

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Fig. 6—L404 with a low voltage relay.
LOW VOLTAGE RELAY
1
24 VOLT
THERMOSTAT
2
THERM
1
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
Fig. 7—L404F, L604A (jumper installed) used
as a high limit, with an alarm circuit.
SPDT
CONTROLLER
(LOW LIMIT)
2
W
B
R
L1
(HOT)
POWER
1
SUPPLY
L2
ALARM
1
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
BREAKS R TO W AND MAKES R TO B WHEN PRESSURE
2
FALLS TO SETPOINT MINUS DIFFERENTIAL.
L404
L1
(HOT)
POWER
1
SUPPLY
L2
LOAD
M8940
FLAME
SAFEGUARD
CONTROL,
MOTOR, OR
OTHER LOAD
L2
M8937
Fig. 8—L404F, L604A (with jumper installed) or
L604M, used as a low limit, with an alarm
circuit.
SPDT
CONTROLLER
(HIGH LIMIT)
2
W
B
R
L1
(HOT)
POWER
1
SUPPLY
L2
ALARM
1
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
BREAKS R TO B AND MAKES R TO W WHEN PRESSURE
2
RISES TO SETPOINT.
Fig. 9—L404F, or L604 with jumper installed,
controlling an M644B motor.
SPDT
CONTROLLER
WHITE
W
RED
2
R
BLUE
B
L1
BLACK
(HOT)
POWER
1
SUPPLY
BLACK
L2
1
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
BREAKS R TO B AND MAKES R TO W WHEN PRESSURE
2
RISES TO SETPOINT.
7
L404A-D,F; L604A,L,M
INSTALLATION
FLAME
SAFEGUARD
CONTROL,
MOTOR, OR
OTHER LOAD
L2
M8938
LINE VOLTAGE
TWO-POSITION MOTOR
CLOSED
W1
(LOW FIRE)
R1
OPEN
B1
(HIGH FIRE)
L1
L2
M644B
M8939
60-2150—10

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