44-608 Model TK1 Side Mounted Liquid Level Switch

Model TK1
Installation and Operating Manual
Side Mounted
Liquid Level
Float Switch
Read this Manual Before Installing
This manual provides information on the Model TK1 Float
Level Switch. It is important that all instructions are read
carefully and followed in sequence. Detailed installation
and wiring instructions are included in this manual.
Conventions Used in this Manual
Certain conventions are used in this manual to convey
specific types of information. General technical material,
support data, and safety information are presented in
narrative form. The following styles are used for notes,
cautions, and warnings.
NOTES
Notes contain information that augments or clarifies an
operating step. Notes do not normally contain actions.
They follow the procedural steps to which they refer.
Cautions
Cautions alert the technician to special conditions that
could injure personnel, damage equipment, or reduce
a component’s mechanical integrity. Cautions are also
used to alert the technician to unsafe practices or the
need for special protective equipment or specific
materials. In this manual, a caution box indicates a
potentially hazardous situation which, if not avoided,
may result in minor or moderate injury.
WARNINGS
Warnings identify potentially dangerous situations or
serious hazards. In this manual, a warning indicates an
imminently hazardous situation which, if not avoided,
could result in serious injury or death.
Safety Messages
Follow all standard industry procedures for servicing electrical equipment when working with or around high
voltage. Always shut off the power supply before touching
any components.
WARNING! Explosion hazard. Do not connect or disconnect equipment unless power has been switched off or the
area is known to be non-hazardous.
Notice of Trademark, Copyright, and Limitations
Magnetrol® & Magnetrol® logotype are registered trademarks
of Magnetrol® International, Incorporated.
Copyright © 2012 Magnetrol® International, Incorporated.
All rights reserved.
Performance specifications are effective with date of issue
and are subject to change without notice. Magnetrol®
reserves the right to make changes to the product described
in this manual at any time without notice. MAGNETROL
makes no warranty with respect to the accuracy of the
information in this manual.
Warranty
All MAGNETROL mechanical level and flow controls are
warranted free of defects in materials or workmanship for
five full years from the date of original factory shipment.
If returned within the warranty period; and, upon factory
inspection of the control, the cause of the claim is
determined to be covered under the warranty; then,
MAGNETROL will repair or replace the control at no cost
to the purchaser (or owner) other than transportation.
MAGNETROL shall not be liable for misapplication,
labor claims, direct or consequential damage or expense
arising from the installation or use of equipment. There are
no other warranties expressed or implied, except special
written warranties covering some MAGNETROL products.
Quality Assurance
The quality assurance system in place at MAGNETROL
guarantees the highest level of quality throughout the
company. MAGNETROL is committed to providing full
customer satisfaction both in quality products and quality
service.
The MAGNETROL quality assurance
system is registered to ISO 9001 affirming
its commitment to known international
quality standards providing the strongest
assurance of product/service quality
available.
Low Voltage Directive
For use in Installation Category II, Pollution Degree 2.
If equipment is used in a manner not specified by the manufacturer, protection provided by the equipment may be
impaired.
2
44-608 TK1 Liquid Level Switch
1.0
Installation
This section provides detailed procedures for properly
installing the Model TK1 Liquid Level Switch.
Caution: If equipment is used in a manner not specified by
manufacturer, protection provided by equipment may be
impaired.
1.1
Unpacking
Unpack the instrument carefully. Inspect all units for damage. Report any concealed damage to the carrier within 24
hours. Ensure that all components have been removed from
the packing material. Check all contents against the packing
list and report any discrepancies to the factory. Check the
nameplate model number to ensure that it corresponds with
the packing slip and purchase order. Record the serial and
model numbers for future reference when ordering parts.
Model Number
Serial Number
1.2
Before You Begin
Caution: During the installation of Model TK1, the float and pivot area
must be kept free of metallic particles that might be
attracted to the magnet.
Caution: This instrument is intended for use in Installation Category II,
Pollution Degree 2.
1.2.1 Site Preparation
1. Ensure that the length and the inside diameter of the
mounting nozzle are sized correctly for the Model TK1.
See dimensional information on page 10 for requirements.
2. Ensure that the mounting nozzle, coupling or flange is
within 3° of horizontal. If mounting the TK1 in an external
cage, ensure that the top/bottom piping is within 3° of vertical in all directions.
1.2.2 Equipment and Tools
No special equipment or tools are required to install the
Model TK1 Liquid Level Switch. The following items are
recommended:
• Wrenches, gaskets and/or bolting as appropriate for the
process connection.
• Pipe wrench
• Level
44-608 TK1 Liquid Level Switch
3
to switch
to switch
1.3
Mounting
The Model TK1 Liquid Level Switch is available with a
11⁄2" or 2" threaded mounting bushing as well as several
flange mountings.
1.3.1 Threaded Mounting
Apply either Teflon® tape or appropriate lubricant to
mounting threads to prevent galling. Engage thread by hand
to avoid damage. Using a pipe wrench, rotate the unit
clockwise until threads are tight in mounting. Ensure that
the N.O. marking on body is upward for normally opened
operation on models with SPST switches. For normally
closed operation, ensure that the N.C. marking is upward.
Models with SPDT or DPDT switches should be mounted
with the N.O. marking upward.
Figure 1
SPST wiring diagram
terminal housing
Red
1.3.2 Flanged Mounting
Red
Green
Have proper flange bolting and gasket(s) on hand. Carefully
align the bolt holes of the TK1 flange with those of the
vessel mounting flange. Ensure that the N.O. marking on
body is upward for normally opened operation on models
with SPST switches. For normally closed operation, ensure
that the N.C. marking is upward. Models with SPDT or
DPDT switches should be mounted with the N.O. marking
upward. Ensure that the flange gasket is seated properly.
Install flange bolting.
Figure 2
SPST wiring N.O. position flying leads
Caution: Operation of all buoyancy type level devices should be done
in such a way as to minimize the action of dynamic forces on
the float or displacer sensing element. Good practice for
reducing the likelihood of damage to the control is to equalize pressure across the device very slowly.
Green
Red
Red
Figure 3
SPST wiring for N.C. position flying leads
NO
to switch
not used
NC
C
Figure 4
SPDT wiring diagram
terminal housing
4
1.4
Wiring
NOTE: A switch or circuit breaker shall be installed in close proximity to
equipment and within easy reach of operator. It shall be marked
as the disconnecting device for the equipment.
NOTE: For supply connections in installations with ambient temperature up to +70° C, use wire with a minimum rating of 75° C as
required by the process conditions. Installations with ambient
temperatures up to +80° C require wire with a minimum rating
of 85° C as required by the process conditions. Use a minimum
of 14 AWG wire for power and ground field wires.
1. SPST reed switch: Switch action is determined by the orientation of the TK1. For actuation on rising level, ensure that
the TK1 is positioned so that the N.O. marking is on top.
For actuation on falling level, ensure that the TK1 is positioned with the N.C. marking on top.
Connect wiring to terminals per the wiring diagram in
Figure 1.
Connect wiring to the flying leads per wiring diagram
in Figure 2 when mounted in N.O. position, and as in
Figure 3 when mounted in N.C. position.
44-608 TK1 Liquid Level Switch
Red
NC
Black
C
2. SPDT reed switch: Connect wiring to terminals per wiring
diagram in Figure 4. Connect wiring to flying leads per
wiring diagram in Figure 5.
3. DPDT relay: Connect wiring to proper switch leads and
run power supply according to the wiring diagram. See
figure 3. This relay must be powered to function. 5A @
24 VDC relay requires 24 VDC power supply while the
5A @ 120 VAC relay requires 120 VAC power supply.
Orange NO
Green
Figure 5
SPDT wiring for flying leads
NOTE: Observe all applicable electrical codes and proper wiring
procedures.
2.0
Preventive Maintenance
Periodic inspections are a necessary means to keep your level
control in good working order. This control is a safety device
that protects the valuable equipment it serves. A systematic
program of preventive maintenance should be implemented
when the control is placed into service. If the following
instructions are observed, your control will provide reliable
protection of your equipment for many years.
2.1
What to Do
2.1.1 Keep Control Clean
BROWN
N.O.
BLUE
N.O.
GRAY
COM.
If applicable, be sure the switch housing cover is always in
place. This cover protects against damaging moisture and
acts as a safety feature by keeping bare wires and terminals
from being exposed. Should the housing cover become
damaged or misplaced, obtain a replacement immediately.
WHITE
COM.
YELLOW
N.C.
ORANGE
N.C.
2.1.2 Inspect Connections Monthly
RED
LEVEL SWITCH
N.O.
TK1 level switches may sometimes be exposed to excessive
heat or moisture. Under such conditions insulation on electrical wires may become brittle, eventually breaking or peeling
away. The resulting bare wires can cause short circuits. Check
wiring carefully and replace at first sign of brittle insulation.
120 VAC or
24 VDC
RED
Check all electrical connections to ensure that they are tight.
Check wiring carefully and repair or replace if necessary.
Figure 6
DPDT wiring diagram
2.1.3 Inspect Entire Model TK1 Unit Periodically
A periodic cleaning of the float, pivot and magnet assembly
will ensure continued free movement of the mechanism.
2.2
What to Avoid
1. NEVER leave the switch housing cover off of the control
longer than is necessary to make routine inspections.
2. NEVER place a jumper wire across terminals to “cut-out”
the control. If a jumper is necessary for test purposes, ensure
that it is removed before placing the control into service.
3. NEVER use in systems containing iron particles. The magnet in
the float assembly can attract the particles and become jammed.
4. NEVER put insulation over the switch housing.
44-608 TK1 Liquid Level Switch
5
3.0
Reference Information
This section presents an overview of the operation of the
Model TK1 Liquid Level Switches, including information
on troubleshooting common problems, maintenance procedures, listings of agency approvals, and detailed physical,
functional, and performance specifications.
3.1
Description
The Model TK1 Liquid Level Switches are float actuated
devices designed for horizontal mounting in a tank or
process vessel through threaded or flanged connections. This
low cost switch is ideal for OEM applications where a single
point high or low level alarm is desired.
3.2
Theory of Operation
Switching action is achieved through the use of a magnet
attached to the float assembly and its interaction with a
switch mechanism. Separating the float magnet and the
switch is a non-magnetic pressure barrier.
As the liquid level changes, the float along with the float
magnet moves. The magnetic field of the float magnet
causes a change of state of the switch, making or breaking
an electrical circuit.
Figure 7
Cross section
3.3
Troubleshooting
The Model TK1 Liquid Level Switch is designed and engineered for trouble-free operation. Common problems are
discussed in terms of their symptoms and corrective actions
as recommended.
3.3.1 External Causes
•
•
•
•
•
6
Usually the first indication of improper operation is failure
of the controlled equipment to function (e.g., pump will
not start (or stop), signal lamps fail to light, etc). When
these symptoms occur, whether at the time of installation or
during routine service thereafter, check for the following
potential external causes first:
Blown fuses
Tripped reset button(s)
Open power switch
Faulty equipment controlled by level switch
Defective wiring to level switch
44-608 TK1 Liquid Level Switch
3.3.2 Model TK1 Causes
1.
2.
3.
4.
5.
6.
7.
If a thorough inspection of these possible conditions fails to
locate the cause of the problem, proceed to a check of the
Model TK1’s switch mechanism.
Disconnect power to the level switch.
Use an electrical continuity checker to determine if the
switch is electrically functional. If the switch does not operate properly when electrically activated, the entire level
switch must be replaced.
If the unit is equipped with a DPDT relay, ensure that it is
properly powered (24 VDC or 120 VAC depending upon
model). Relay will not function unless it is powered.
If the switch functions properly electrically but does not
activate when the float changes position, remove level
switch from service. Check the float assembly for obstructions or accumulation of particles which may cause binding.
If binding is present in the float assembly and cannot be
cleared by normal cleaning procedures, the entire control
must be replaced.
If the complete Model TK1 level switch operates properly
when removed from service, check to ensure that liquid is
entering the tank or vessel. A closed valve or clogged
pipeline may prevent movement of the liquid in the vessel.
Check the float to make sure it is buoyant in the liquid
(tank or vessel must have adequate level).
If the float is determined to be filled with liquid or is collapsed, the entire level switch must be replaced. Do not
attempt to repair the float.
If all of the components of the level switch are in operating
condition, the trouble is likely located external to the level
switch. Repeat inspection of external conditions as described
in Section 3.3.1.
NOTE: When in doubt about the condition or performance of a
Model TK1 control, consult the factory for further instructions.
44-608 TK1 Liquid Level Switch
7
3.4 Agency Approvals
AGENCY
APPROVED MODEL
PROTECTION METHOD
AREA CLASSIFICATION
FM
TK1-X0XX-BXJ
Explosion Proof
Class I, Div 1; Groups C, D
Class II, Div 1; Groups E, F, G
TK1-X0XX-BXA
Class III, Type 4X IP66
CSA
TK1-X0XX-BXK
Explosion Proof
Class I, Div 1; Groups C, D
Class II, Div 1; Groups E, F, G
TK1-X0XX-BXC
Class II, Div 1; Groups E, F, G
Type 4X
CE
TK1-X0XX-XXX
Low Voltage Directives
Installation Category II
2006/95/EC
Pollution Degree 2
Per Horizontal Standard:
EN 61010-1/1993 & Amendment No. 1
8
44-608 TK1 Liquid Level Switch
3.5
Specifications
3.5.1 Physical Specifications
Measured Variable
Liquid level
Deadband
Narrow differential, 0.50"
Minimum Specific Gravity
0.40
Float Material
316/316L stainless steel
Mounting Connection Material
316/316L stainless steel
Trim Material
316/316L with 18-8 stainless steel pivot pin
Process Connections
11⁄2" or 2" NPT or BSP threads
2" 150# or 300# ANSI flanges
Process Temperature Range
-40° to +300° F (-40° to +149° C)
Ambient Temperature Range
-40° to +160° F (-40° to +71° C)
Maximum Process Pressure
1500 psi (103 bar)
3.5.2 Electrical Specifications
Signal Output
Switch closure
Type of Contacts
SPST, SPDT or DPDT
Type of Switches
Hermetically sealed reed switch
Four-wire dry contact relay
Switch Ratings
Reed Switches, 100 VA, 240 VAC/VDC maximum,
1.0 A maximum switching current or
Reed Switches, 30 VA, 240 VAC/VDC maximum,
0.5 A maximum switching current
42 VA, 5 amp @ 24 VDC hermetically sealed relay, 0.9W, 650 Ω resistance
42 VA, 5 amp @ 120 VAC hermetically sealed relay, 1.2 VA
Enclosure Rating
NEMA 4X/7/9
Class I, Div. 1, Groups C & D
Enclosure Material
316/316L stainless steel or cast iron/aluminum
Electrical Connection
1
Contact Material
Silver cad-oxide
44-608 TK1 Liquid Level Switch
⁄2" NPT or condulet box(es) with 3⁄4" NPT
9
3.5.3 Dimensional Specifications – inches (mm)
➀
.20 (5)
ef.
)R
3
8 (7
.20 (5) ➀
ef.
2.8
R
73)
8(
2.8
0.85
(22)
1
/2" NPT
2 (51)Ø
1
/2" NPT
2 (51)Ø
1.15
(29)
1.5" Ø
➁
1
(25)
1
1 /2" or 2" NPT
1
3.5 (89)
(25)
6.5 (165) ➀
TK1 with threaded connection and
SPST or SPDT switch with flying leads
3.5 (89)
6.5 (165) ➀
TK1 with flanged connection and
SPST or SPDT switch with flying leads
Add 0.75" for models with extended stems.
Travel below center line is 1.44" (37 mm) for models with extended stems.
1
/2" NPT
4 (102) Ref.
3.38 (86)
9)
(7
4.5 (114) Ref.
12
3.
3.25 (83)
3
/4" NPT
3
/4" NPT
Junction box supplied
with DPDT relay
Junction box available with
SPST or SPDT reed switch
Nozzle Limits – Inches (mm)
Standard Stem
Extended Stem
Maximum Allowable
Nozzle Lengths
11⁄2" NPT 2" NPT
0.71 (18) 1.94 (49)
1.25 (32)
n/a
Minimum Nozzle
ID Required
for Longer Length
2.30 (58)
2.88 (73)
Based upon nozzle ID equaling 1.70 (43).
Based upon nozzle ID equaling 2.17 (55).
10
44-608 TK1 Liquid Level Switch
3.6
Model Numbers
TECHNOLOGY TYPE
TK
Side-mounted float level switch
FLOAT
1
Narrow differential, minimum s.g. 0.40, 316/316L stainless steel; maximum process pressure 1500 psi
FLOAT STEM
0
1
Standard length Extended length Use for 11⁄2" nozzles to 0.71" (18 mm) long and 2" nozzles to 1.94" (49 mm) long
Use for 11⁄2" nozzles between 0.72" (18 mm) and 1.25" (32 mm) long
PROCESS CONNECTION SIZE
1
2
1.5" (process connection type code N & T only)
2" or 2" ANSI
PROCESS CONNECTION TYPE AND RATING
N
T
A
B
NPT
BSP thread
150# ANSI RF flange (process connection size code 2 only)
300# ANSI RF flange (process connection size code 2 only)
CONNECTION MATERIAL
B
316/316L stainless steel
SWITCH TYPE
R
SPST reed switch
S
SPDT reed switch
D
E
100 VA, 240V, 1 A or 30 VA, 240V, 0.5 A
Four-wire DPDT powered relay in junction box 42 VA, 5 A @ 120 VAC (housing codes A & C only)
Four-wire DPDT powered relay in junction box 42 VA, 5 A @ 24 VDC (housing codes A & C only)
This relay requires a power source to function.
HOUSING AND APPROVAL
J
A
K
C
T
K
1
44-608 TK1 Liquid Level Switch
0
316 SS, FM XP (switch types R & S only)
316 SS with cast iron/aluminum junction box, FM XP
316 SS, CSA XP (switch types R & S only)
316 SS with cast iron/aluminum junction box, CSA XP
B
11
ASSURED QUALITY & SERVICE COST LESS
Service Policy
Return Material Procedure
Owners of MAGNETROL controls may request the return
of a control or any part of a control for complete rebuilding
or replacement. They will be rebuilt or replaced promptly.
Controls returned under our service policy must be returned
by Prepaid transportation. MAGNETROL will repair or
replace the control at no cost to the purchaser (or owner)
other than transportation if:
So that we may efficiently process any materials that are
returned, it is essential that a “Return Material
Authorization” (RMA) number be obtained from the factory,
prior to the material's return. This is available through a
MAGNETROL local representative or by contacting the
factory. Please supply the following information:
1. Returned within the warranty period; and
2. The factory inspection finds the cause of the claim to be
covered under the warranty.
If the trouble is the result of conditions beyond our control;
or, is NOT covered by the warranty, there will be charges
for labor and the parts required to rebuild or replace the
equipment.
In some cases it may be expedient to ship replacement parts;
or, in extreme cases a complete new control, to replace the
original equipment before it is returned. If this is desired,
notify the factory of both the model and serial numbers of
the control to be replaced. In such cases, credit for the materials returned will be determined on the basis of the applicability of our warranty.
1.
2.
3.
4.
5.
Company Name
Description of Material
Serial Number
Reason for Return
Application
Any unit that was used in a process must be properly
cleaned in accordance with OSHA standards, before it is
returned to the factory.
A Material Safety Data Sheet (MSDS) must accompany
material that was used in any media.
All shipments returned to the factory must be by prepaid
transportation.
All replacements will be shipped F.O.B. factory.
No claims for misapplication, labor, direct or consequential
damage will be allowed.
5300 Belmont Road • Downers Grove, Illinois 60515-4499 • 630-969-4000 • Fax 630-969-9489 • www.magnetrol.com
145 Jardin Drive, Units 1 & 2 • Concord, Ontario Canada L4K 1X7 • 905-738-9600 • Fax 905-738-1306
Heikensstraat 6 • B 9240 Zele, Belgium • 052 45.11.11 • Fax 052 45.09.93
Regent Business Ctr., Jubilee Rd. • Burgess Hill, Sussex RH15 9TL U.K. • 01444-871313 • Fax 01444-871317
Copyright © 2012 Magnetrol International, Incorporated. All rights reserved. Printed in the USA.
Performance specifications are effective with date of issue and are subject to change without notice.
Magnetrol & Magnetrol logotype are registered trademarks of Magnetrol International, Incorporated.
BULLETIN: 44-608.9
EFFECTIVE: March 2012
SUPERSEDES: May 2010