MADISON M4190 Instalación Y Mantenimiento

Installation and Maintenance
M4190 & M4065
Liquid Level Switches
English • Espanol
Madison Company
27 Business Park Drive
Branford, CT 06405
(203) 488-4477 • Fax (203) 481-5036
E-mail: info@madisonco.com
www.madisonco.com
Madison Europe
Windmolen 22
7609 NN Almelo • The Netherlands
+ 31 (0) 548 659 034 • Fax: + 31 (0) 548 659 010
E-mail: europe@madisonco.eu
ECN #11537 • Effective Date 12/6/2019 • MF-023, Rev. C
NOTE: These switches should be installed in environments
that are free of excessive shock loads and highly
contaminated fluid.
Model M4190 Series:
1. Apply a suitable thread sealing compound to the 1" NPT
thread on the switch.
2. Carefully insert the float through the 1" NPT tank fitting
and continue until the threads on the switch reach the
tank fitting.
3. Thread the switch into the tank fitting and tighten it so
that the arrows on the switch are pointing UP (VERTICAL)
+/- 15 degrees.
4. Connect the switch leads to the control circuit in
accordance with all applicable codes and requirements.
Model M4190-HP:
This model can only be installed where there is access to the
inside of the tank unless a bushing or adapter is used to
adapt the switch to fit a larger opening, 2" NPT, minimum.
1. Carefully unscrew the float from the switch.
2. Apply a suitable thread sealing compound to the 1" NPT
thread on the switch.
3. Carefully insert the stem through the 1" NPT tank fitting
and continue until the threads on the switch reach the
tank fitting.
4. Thread the switch into the tank fitting and tighten it so
that the arrows on the switch are pointing UP (VERTICAL)
+/- 15 degrees.
5. Thread the float back onto the switch. We recommend
the use of LocTite or similar thread locking compound
on these threads.
6. Connect the switch leads to the control circuit in
accordance with all applicable codes and requirements.
NOTE:
If the tank fitting is larger than 1" NPT, a suitable bushing or
adapter may be used to adapt the Model M4190 to the
larger tank fitting. Verify that the bushing
or adapter does not interfere with the moving parts of
the M4190 before installation.
Model M4190-SM:
NOTE:
1. To install model M4190-SM, you must have a "clearance
zone" inside the tank of at least 2.25" deep and 8.25"
diameter, centered on the port that the switch will be
mounted in.
2. We recommend that model M4190-SM not be mounted
using a bushing or adapter since these tend to decrease
the space between the float and the inside wall of the tank.
M4190 & M4065 Specifications:
These units are intended to be
mounted into the side of a tank
for sensing high, low or interme-
diate levels. The model M4190-SM
is intended for mounting through
the top of a tank in situations
where there is limited tank depth
or it is desirable to keep the switch
mechanism out of the liquid. They
are constructed of corrosion resis-
tant materials throughout. They
feature an SPDT switch to simplify
wiring of control circuits. The
M4190 series switch incorporates a 1/2" NPT stub for the
connection of junction boxes or conduit.
Wiring Diagram
M4190 Series:
Orange
Black
Com
Red
NC
Installation Instructions:
Model M4065:
1. Remove the switch cover by removing the (6) nuts that
secure it and lifting the cover and its gasket off.
2. Unthread the brass locknut that secures the switch and
plate to the fitting assembly while moving the base plate
along with the nut as you unscrew it. Continue until the
nut is past the end of the fitting and you can pull the
base plate off the fitting. Be sure to save the gasket that
is found on the fitting.
3. Apply a suitable thread sealant to the 1-1/2" NPT thread
on the float side of the fitting.
4. Feed the float through the tank port until the fitting
engages the port threads. Thread the fitting into the port
and tighten so that the flat on the outside threaded end
of the fitting is facing down +/- 15º. This can be checked
by holding a small level against the flat.
5. Re-install the switch and base plate and locknut to the
outside end of the fitting, in the same manner as
described in step 2. Be sure to reinstall the gasket over
the threaded end of the fitting first! Be careful to guide
the switch arm so that the magnet holder on the end
goes against the flat on the fitting. Snug the locknut to
the fitting using a punch or screw driver (in one of the
notches) and a hammer.
6. Connect a continuity tester across either switch contact.
Move the float upwards. Verify that the switch operates
before the float reaches the end of its travel. Repeat this
test several times.
7. If the switch does not operate correctly, it can be
adjusted by slightly loosening the (2) screws that attach
it to the bracket and moving it up or down to get proper
operation. Be sure to keep the switch arm parallel to the
flat on the fitting. Re-test to be sure that the switch is
operating correctly. Re-tighten the screws.
8. The cover gasket should be placed over the threaded
studs in the base plate.
9. Connect your wiring to the switch terminals. All electrical
wiring must be done in accordance with all applicable
local codes and requirements. The cover must be drilled
as your installation requires for connecting conduit(s).
We suggest the use of flexible conduit between the
switch and fixed conduit, if possible.
10. Place the cover over the studs and secure it with the
supplied nuts. Tighten nuts evenly so you do not damage
the gasket!
NOTE:
If the switch is mounted into a port that is larger than 1",
using a bushing or other adapter, verify that the float will not
be obstructed from moving through its full travel before
installing it into the tank.
Model M4065 ELECTRICAL RATINGS:
20A @ 125, 250, or 480 VAC
10A @ 125 VAC INDUCTIVE
1 HP @ 125 VAC, 2 HP @ 250 VAC
1/2A @ 125 VDC, 1/4A @ 250 VDC
Float Material
Stem & Fitting Material
Other Wetted Materials
Max. Operating Temp.
Max. Operating Pressure
Switch Type, Rating
Float S.G.
Lead Wires
M4190 Series:
Spring
Magnet
Pivot
NO
Pin
Shuttle
Float & Cam
Assembly
M4190 M4190-BU M4190-HP
304 SS Buna-N 304 SS
304 SS 304 SS 304 SS
Teflon, Ceramic, SS
150º C 105º C 150º C
150 PSI 100 PSI 900 PSI
SPDT, 100VA / 120VAC Max.
0.6 0.45 0.5
22 AWG Teflon Insulated, 24" long
* Model M4065 Electrical Ratings listed below in middle column
Level Switch Maintenance:
MAINTENANCE - M4190 Family
In applications where there is a large amount of
contamination in the fluid, it may be necessary to clean
the switch mechanism periodically. This is done by
carefully driving the pivot pin part way out (approx. 3/8")
and then removing the float and cam assembly, followed
by the shuttle and magnet and the spring. Use a 1/8" pin
punch and a small hammer to remove the pin. Clean the
parts and the inside of the switch body with a suitable
cleaning solution and re-assemble them. Make sure that
the mechanism moves freely after re-assembly.
MAINTENANCE - M4065
1. Switch Adjustment – The switch is set at the factory for
correct operation. Over time it may be necessary to
adjust it due to wear or other factors. There are two
different switch adjustments and they are done as
follows:
1.1 Lateral Adjustment
1.1.1 Loosen the 2 nuts that secure the switch
mounting bracket to the plate.
1.1.2 Move the bracket left or right to center the
magnet holder (on the end of the switch arm)
on the flat on the bottom of the fitting.
1.1.3 Tighten the nuts.
1.2 Vertical Adjustment
1.2.1 Loosen the 2 screws that secure the switch to
the bracket.
1.2.2 Move the switch up or down so that the switch
arm is parallel with the flat on the fitting and
the magnet holder is against the flat. You
should feel resistance from the internal spring
in the switch, but it must not be pushed down
so far that the switch has operated.
1.2.3 Check for correct operation of the switch, then
tighten the screws.
2. Float Removal & Replacement – If it becomes
necessary to replace the float, the float can be un-
screwed from its shaft. To remove the float:
2.1 Heat the end of the float shaft with a heat gun, or
equivalent, to break the adhesive bond.
2.2 Put a 7/32" open-end wrench on the flats at the
float end of the shaft and grasp the float with a
strap wrench (or similar tool) and un-screw the
float, turning one tool against the other.
2.3 When reinstalling the float, apply LocTite 242 or a
suitable thread locking compound to the threads
before assembly.
3. Disassembly & Cleaning – In applications where there
is a large amount of contamination in the fluid, it may
be necessary to clean the switch mechanism
periodically. This is done by:
3.1 Removing the retaining ring from the float side of
the fitting.
3.2 Then, work the Float and Pivot assembly out of the
fitting, being sure to catch the locating pin
(1/8 dia. X 1/4" long).
3.3 If necessary, the pivot shaft and bushing are
disassembled by removing the pivot pin and
separating the 2 parts (Be sure to note the
orientation of the notch in the pivot bushing to the
flat side of the inner end of the shaft).
3.4 Clean the parts and the inside of the switch body
with a suitable cleaning solution.
3.5 Re-assemble all of the float and pivot components.
Make sure that the mechanism moves freely after
re-assembly. Be sure that the notch in the pivot
bushing is toward the float and the notch is on the
same side as the flat on the inner end of the shaft.
3.6 Insert the pivot assembly into the fitting, being
sure to align the notch in the pivot bushing with
the mating notch in the fitting.
3.7 Insert the locating pin into the notch and reinstall
the retaining ring.
3.8 Test operation as described in Installation step 6.
M4190-SM M4065
304 SS 304 SS
304 SS 304 SS
150ºC 125ºC
150 PSI 100 PSIG
*
0.6 0.6