L6006A AQUASTAT® CONTROLLER
3
69-02355
Fig. 3. Typical wiring hookup using
L6006 for low limit and circulator
control in oil-fired hydronic system.
Fig. 4. Typical wiring hookup using L6006
with L8148A Aquastat Relay.
OPERATION
Select control settings according to the heating system
manufacturer recommendations.
High-limit Controllershuts off burner when water
temperature exceeds high-limit setting. R-B contacts
make, and burner restarts when temperature drops to
high-limit setting minus the temperature differential.
Low-limit Controllermaintains minimum water
temperature for domestic hot water; e.g., tankless coil in
heating boiler. Makes R-B contacts at temperature
setting minus differential.
Circulator Controllerprevents circulation of water that is
not hot enough. Breaks R-W contacts for circulator circuit
at temperature setting minus differential; remakes the
R-W contacts for circuit when the temperature setting
is reached.
Switching action operates as follows:
When there is a drop in water temperature (to dial
setting, less differential), the R to B contacts make
and the R to W contacts break, preventing circulator
operation. When there is a rise in water temperature
(to dial setting), R to B contacts break and R to W
circulator contacts make.
ADJUSTMENT
Set the differential according to the system manufacturer
recommendations. Rotate the wheel on the back of the
snap switch until the desired reading is aligned with the
V notch in the frame. The wheel provides an adjustment
from 5°F to 30°F (3°C to 17°C). Replace the cover on the
Aquastat Controller.
Adjust the control point according to the system
manufacturer recommendations. To adjust, insert a
screwdriver in the slotted screw type head located
beneath the window in the cover. Turn the scale to the
desired control point. Move the factory-set stop if
desired, as shown in Fig. 5.
Fig. 5. Moving factory-set stop on L6006A.
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