Install Instructions

95-6701—5 G.R. Rev. 12-01 www.honeywell.com
L6081A AQUASTAT® CONTROLLER
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Fig. 4. Internal view of L6081A.
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).
Example: 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).
Setting Stop
The 126580 Setting Stop may be installed on the
adjusting knob to prevent turning the knob beyond a
predetermined point. Fig. 6 shows the stop installed on
the knob of a high limit switch at a setpoint of 180°F
(82°C). To install the setting stop, proceed as follows:
1. Turn the knob to the setting that is to be estab-
lished as the limit.
2. Place the setting stop over the knob in position so
the arm of the setting stop (after stop is pressed
into place) strikes projection A and prevents
turning the knob beyond the desired limit setting.
IMPORTANT:
Be extremely careful when installing the setting
stop. It cannot be reset once it is in place. If the
stop must be removed, snip it off with cutters;
do not twist off.
3. Press setting stop tightly onto the knob so its inner
teeth engage the knob securely.
4. Turn the knob back and forth several times to
make sure the stop functions properly.
5. When all settings are made, replace the cover.
Fig. 5. Relationship of setpoints and differential
adjustments.
Fig. 6. Setting stop installed to prevent turning high
limit setting beyond 180°F (82°C).
CHECKOUT
Put system into operation. Carefully observe the
operation of all components for at least one complete
cycle.
M8848
WELL CLAMP
SCREW
STRIP
GAUGE
LOW LIMIT/
CIRCULATOR
DIFFERENTIAL
ADJUSTMENT
LOW LIMIT
SETPOINT
ADJUSTMENT
JUMPER
SLOT
HIGH LIMIT
SETPOINT
ADJUSTMENT
LOW LIMIT
AND
CIRCULATOR
SETTING
HIGH LIMIT
SETTING
SWITCH BREAKS ON
RISE. BURNER TURNS OFF.
CIRCULATOR OPERATES
ON A CALL FOR HEAT.
SWITCH MAKES ON
FALL. BURNER
OPERATES ON A
CALL FOR HEAT.
SWITCH MAKES R-W
AND BREAKS R-B ON
RISE. 10
°F (6°C)
DIFFERENTIAL.
SWITCH MAKES R-B AND
BREAKS R-W ON
FALL. BURNER IS ON;
CIRCULATOR IS OFF.
110°F (43°C)
240°F (116°C)
M8875
SWITCH MAKES R-W
AND BREAKS R-B ON
RISE. 25°F (14°C)
DIFFERENTIAL.
10°F (6°C)
DIFFERENTIAL
25°F (14°C)
DIFFERENTIAL
10°F (6°C)
DIFFERENTIAL
L6081A,C
220
200
160
140
180
SETTING STOP
SETTING
STOP ARM
PROJECTION "A"
KNOB SET AT 180°F (82°C)
M2844
1
1
SCALE MARKINGS IN FAHRENHEIT ONLY.