Honeywell Pressuretrol L404 Series - Page 7

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