Flush-Mounted Aquastat Replacement; Well-Mounted Aquastat Replacement - Honeywell L7224U Manual Del Usaurio

Fig. 2. Removing horizontal or vertical mounting
knockout.
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 wir-
ing, 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 (furnished
with TRADELINE
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
®
models) as follows: Fold the
BOILER
IMMERSION
SENSOR
WELL
HEAT-CONDUCTIVE COMPOUND
(OPTIONAL)
M16120
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.
THERMOSTAT
TERMINALS
TX
TT
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.
3
®
CONTROLLER
ENVIRACOM TM
TERMINALS
T
T 3
2
DISPLAY
1
B1 ZC C1
LED's
SENSOR
CONNECTOR
SENSOR HOLES
FUSE
LEDs.
69-1720EFS—11
M32197