Install Instructions

L6081A AQUASTAT® CONTROLLER
3 95-6701—5
Fig. 3 shows a typical L6081A hookup.
NOTE: If the 128975 Field Addable Jumper (included)
is used (Fig. 2 and 3), make sure that the two
prongs of the jumper face the center of the
controller.
OPERATION AND SETTING
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.
Fig. 2. Internal wiring of L6081A.
Fig. 3. Typical L6081A hookup.
WARNING
Explosion Hazard.
Can cause severe injury, death or property
damage.
Use this product only in systems with a pressure
relief valve.
Low Limit and Circulator Controls
On a temperature rise, with the adjustable differential at
the minimum setting of 10°F (6°C), the burner circuit
R-B breaks and the circulator control 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 temperature are the setpoint
temperature plus the difference between the differential
setting and 10°F (6°C).
M8874A
1
2
3
3
3
1
2
MAKES R-B, BREAKS R-W ON TEMPERATURE FALL.
BREAKS ON TEMPERATURE RISE.
B TERMINALS ARE TAB TERMINALS.
B
R
W
B
R
JUMPER
HIGH LIMIT
LOW LIMIT/CIRCULATOR
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