Flush-Mounted Aquastat Replacement; Well-Mounted Aquastat Replacement - resideo Aquastat L7224U Manual Del Usuario

Fig. 2. Removing horizontal or vertical mounting
IMPORTANT
Best thermal response is obtained with a well
that snugly fits the sensor. Insert the sensor
until it rests against the bottom of the well. Use
a well of correct length and bend the wiring, if
necessary, to hold the bulb against the bottom
of the well.
If the well is not a snug fit on the sensor, use the
heat-conductive compound as follows: Fold the
plastic bag of compound lengthwise and twist it
gently. Then snip off end of bag and work the
open end of the bag all the way into the well.
Slowly pull out the bag while squeezing it firmly
to distribute compound evenly in the well. Bend
the wiring, if necessary, to hold the sensor
against the bottom of the well and to hold outer
end of the sensor in firm contact with the side of
the well. See Fig. 3. Wipe excess compound
from the outer end of the well.
SENSOR WIRES
CONTROLLER CASE
IMMERSION
WELL CLAMP
IMMERSION WELL
CLAMP SCREW
Fig. 3. Position of sensor in immersion well.
L7224U OIL AND ELECTRIC BOILER ELECTRONIC AQUASTAT
KNOCKOUT FOR
HORIZONTAL
MOUNT
SCREWDRIVER
KNOCKOUT FOR
VERTICAL MOUNT
M22118
knockout.
BOILER
IMMERSION
SENSOR
WELL
HEAT-CONDUCTIVE COMPOUND
(OPTIONAL)
Flush-Mounted Aquastat
Replacement
Turn off all power and remove the old controller. Refer to
the cover insert of the old controller to identify and tag
each external lead as it is disconnected. If the old well is
unsuitable for the new installation, remove it and replace
it with a suitable new well. If the old well is suitable, use
it. See Fig. 1 and 4 for mounting tab location.
ZR
L1
L2
C2
B2
C1
B1
ZC
FLUSH MOUNTING TAB (2)
Fig. 4. Location of L7224U flush-mounting tabs and
Well-Mounted Aquastat
Replacement
Turn off all power and remove the old controller. Refer to
the cover insert of the old controller to identify and tag
each external lead as it is disconnected. If the old well is
unsuitable for the new installation, remove it and proceed
with instructions for new installation. If the old well is
suitable, use it.
1. Loosen, but do not remove, the well clamp screw
on the side of the controller case.
2. Position immersion well clamp snugly over the
flange of the adapter and tighten the clamp screw.
3. Insert the sensor into the well as shown in Fig. 5.
(If desired, distribute the heat-conductive com-
pound in the tube prior to sensor insertion, as
described in New Installation.)
4. Make sure sensor is fully seated to bottom of well
(Fig. 5). Use a small pencil to measure depth of
sensor in well, if necessary.
M16120
3
THERMOSTAT ENVIRACOM
TERMINALS TERMINALS
T
T 3
2
1
TX
TT
B1 ZC C1
LEDs.
®
CONTROLLER
TM
DISPLAY
LED's
SENSOR
CONNECTOR
SENSOR HOLES
FUSE
M32197
69-1720EFS—13