Dwyer L10 - Manual

INSTALLATION
1. Unpack switch and remove any packing material found inside lower housing or
float chamber (tee).
2. WARNING Mechanical shock and vibration can cause damage to the reed
switch. Care should be taken to avoid dropping the switch on hard surfaces or
impacting the switch assembly.
3. Switch must be installed with body in a horizontal plane with arrow on side of
body pointing down.
4. If switch has an external float chamber (tee), connect it to vertical sections of 1˝
NPT pipe installed outside vessel walls at appropriate levels. If unit has no external
float chamber, it must be mounted in a 1˝ NPT half coupling welded to the vessel
wall. The coupling must extend through the wall. Use Teflon
® thread tape or pipe
joint compound to assure a good seal.
5. Connect the wiring in accordance with local electrical codes.
6. Inductive, capacitive and lamp loads can all create conditions harmful to the reed
switch.
Series L10 Flotect ™ Mini-Size Level Switch
Bulletin E-37
Specifications – Installation and Operating Instructions
W.E. ANDERSON DIV., DWYER INSTRUMENTS, INC.
P.O. BOX 358 • MICHIGAN CITY, INDIANA 46361 U.S.A.
Phone: 219/879-8000 www.dwyer-inst.com
Fax: 219/872-9057 e-mail: [email protected]
1/4 [6.35]
TRAVEL TO
NORMALLY
CLOSED
POSITION
2-7/8
[73.07]
5-7/16 [138.13]
4 [101.6]
18 AWG
LEAD WIRE
1 NPT
3
[76.20]
1
[25.40]
19
[482.6]
CABLE
1/4 [6.35] TRAVEL
TO NORMALLY
CLOSED POSITION
2-7/8
[73.07] 19
[482.6]
CABLE
1 NPT
4 [101.6]
18 AWG
LEAD WIRE
NORMALLY CLOSED NORMALLY OPEN
Ø1 [25.40] X
2 [50.80] LONG
2-7/8
[73.03]
3-1/2
[88.90]
1
[25.40]
2-3/8
[60.33]
1
[25.40]
1-1/16
[26.99]
2-7/8
[73.07] 1
[25.40]
1/4 [6.35] TRAVEL
TO NORMALLY
CLOSED POSITION 1-3/4
[44.45]
Ø1
[25.40]
1 NPT
4 [101.6]
18 AWG
LEAD WIRE
3-1/4
[82.55]
19
[482.6]
CABLE
3/4
[19.05]
A) Inductive loads can be caused by electromagnetic relays, electromagnetic
solenoids and electromagnetic counters, all with inductive compenents as the
circuit load.
B) Capacitive loads can be caused by capacitors connected in series with or
parallel to the reed switch. IN a closed circuit, the calbe length (150 ft or more) to
the switch can introduce a capacitance.
C) Lamp loads can be caused by switching lamp filaments which have low cold
resistance.
In addition to these causes, exceeding any of the maximum electrical ratings can
lead to premature or immediate failure. This includes inrush and surge currents
greater than the maximum switching current. To accomodate these conditions,
see diagrams on the reverse for possible solutions.
7. After installation, set the switch action to NO (normally open) or NC (normally
closed). Normally open contacts close and normally closed contacts open when
liquid level in the vessel lifts the float past the actuation point. To change, loosen,
but do not remove, the two screws on the switch cap. Slide the reed switch
assembly to expose the switch action needed. Tighten screws when adjustment
is complete.
Model
Number
L10-B-3-O
L10-B-3-A
L10-B-3-C
L10-B-3-B
L10-B-3-H
L10-S-3-O
L10-S-3-A
L10-S-3-C
L10-S-3-S
L10-S-3-L Body
Material
Brass
Brass
Brass
Brass
Brass
St. Steel
St. Steel
St. Steel
St. Steel
St. Steel Installation/
Mounting
Side Wall
Side Wall
Side Wall
Ext. Tee
Ext. Tee
Side Wall
Side Wall
Side Wall
Ext. Tee
Ext. Tee Float
Material
Solid Polypropylene
Cylindrical St. Steel
Round St. Steel
Solid Polypropylene
Round St. Steel
Solid Polypropylene
Cylindrical St. Steel
Round St. Steel
Solid Polypropylene
Round St. Steel Max. Press.
psig (bar)
1000 (68.9)
200 (13.8)
350 (24.1)
250 (17.2)
250 (17.2)
2000 (137.8)
200 (13.8)
350 (24.1)
2000 (137.8)
350 (24.1) Min.
S.G.
0.9
0.5
0.7
0.9
0.7
0.9
0.5
0.7
0.9
0.7
SPECIFICATIONS
Service: Compatible liquids.
Wetted Materials:
Float: Solid polypropylene or 304 SS;
Body: Brass or 303 SS;
Magnet: Ceramic;
External float chamber (tee): None,
brass, or 304 SS; Other: Lever arm,
pin, spring, etc.: 301 SS, 302 SS,
316 SS.
Temperature Limit: 200°F (93°C).
Pressure Limit: See model chart.
Enclosure Rating: Weatherproof,
meets NEMA 4X (IP66).
Switch Type: SPST hermetically
sealed reed switch. Field adjustable
for normally open or normally closed.
Electrical Rating: 1.5 A @ 24 VDC
res., 0.001 A @ 200 VDC res., 0.5A @
125 VAC.
Electrical Connections: 18 AWG, 19˝
(483 mm) long, PVC jacket. Rated
221°F (105°C).
Process Connection: 1˝ male NPT
standard on models without external
float chamber. Change 3 in model
number to 4 for 1-1/4˝, to 5 for 1-1/2˝, or
6 for 2˝. 1˝ female NPT on models with
external float chamber.
Mounting Orientation: Horizontal with
index arrow pointing down.
Weight: Approximately 10 oz (0.283 kg)
without external float chamber, 2.32 lb
(1.05 kg) with external float chamber.
Specific Gravity: See model chart.
Agency Approvals: UL and CSA.
Switch Enclosure: Nylon.