Submittal Sheet

L4081A,B AND L6081A,C MULTIPLE AQUASTAT® CONTROLLERS
7 60-2105—6
Fig. 9. L6081A used with oil burner.
OPERATION
High Limit
The high limit opens and turns off the burner when the water
temperature reaches the setpoint. The high limit automatically
resets after the water temperature drops past the setpoint and
through the 10°F (6°C) differential.
Low Limit and Circulator
On a temperature rise, with the adjustable differential at the
minimum setting of 10°F (6°C) (also applies to fixed 10°F
[6°C] differential models), the burner circuit (R-B) breaks and
the circulator circuit (R-W) makes at the control setpoint. On a
temperature drop of 10°F (6°C) below the setpoint, the R-B
circuit makes and the R-W circuit breaks.
At any differential setting greater than 10°F (6°C), the R-B
make temperature and R-W break temperature remain the
same control setting minus 10°F (6°C). The R-B break and
R-W make temperatures are the setpoint temperature plus the
difference between the differential setting and 10°F (6°C).
Examples:
L4081A: Setpoint of 140°F (60°C); differential set at 25°F
(14°C). On a temperature rise, the switch breaks at 155°F
(69°C). On a temperature fall, the switch makes at 130°F
(55°C).
L4081B: Setpoint of 140°F (60°C); differential set at 25°F
(14°C). On a temperature rise, the switch makes at 155°F
(69°C). On a temperature fall, the switch breaks at 130°F
(55°C).
L6081A,B: Setpoint of 140°F (60°C); differential set at 25°F
(14°C). On a temperature rise, R-B breaks and R-W makes
at 155°F (69°C). On a temperature fall, R-B makes and
R-W breaks at 130°F (55°C).
M8855
L1
(HOT)
L2
1
2
1
2
POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
B TERMINALS ARE TAB TERMINALS.
SOLID
STATE
SWITCH
SAFETY
SWITCH
HEATER
B
2
4 3 1
B
RR
W
BURNER MOTOR
OIL VALVE
IGNITION
SS
1K
1K2
1K1
F
F
T
T
R4184D PROTECTORELAY™ CONTROL
JUNCTION BOX
BLACK
ORANGE
WHITE
CIRCULATOR
L6081A
JUMPER
ADDED
24V
THERMOSTAT
1R
1R1
RA89A SWITCHING RELAY
CAD
CELL