United Electric Controls 12 Series User manual

IMP12-16
www.ueonline.com
1
PRIOR TO INSTALLATION, CHECK THE WETTED PARTS MATERIAL FOR
COMPATIBILITY TO THE PROCESS MEDIA.
THE DUAL SEAL DEVICE METHOD OF PRIMARY SEAL FAILURE
ANNUNCIATION IS VISIBLE LEAKAGE FROM THE ENCLOSURE.
DEPENDING UPON MEDIA SENSED, ADDITIONAL METHODS OF LEAK
DETECTION MAY BE REQUIRED.
PROOF PRESSURE* LIMITS STATED WITHIN THE LITERATURE
AND PRINTED ONTO THE PRODUCT HOUSING MUST NEVER
BE EXCEEDED, EVEN BY SURGES IN THE SYSTEM. OCCASIONAL
OPERATION OF THE PRODUCT UP TO PROOF PRESSURE IS
ACCEPTABLE (E.G., START-UP, TESTING). CONTINUOUS OPERATION SHOULD
NOT EXCEED THE DESIGNATED OVER RANGE PRESSURE** OR WORKING
PRESSURE RANGE***.
*Proof Pressure - the maximum pressure to which a pressure sensor may be
occasionally subjected, which causes no permanent damage (e.g., start-up
testing). The product may require set-point adjustment after reaching proof
pressure.
**Over Range Pressure - the pressure value to which a pressure sensor may be
continuously subjected without causing damage and while maintaining set
point repeatability.
***Working Pressure Range - the pressure range within which two opposing
sensors can be safely operated while maintaining set point repeatability.
THE EPOXY RESIN SHALL NOT BE SUBJECTED TO A TEMPERATURE
GREATER THAN 125°C.
THIS PRODUCT DOES NOT HAVE ANY FIELD REPLACEABLE
PARTS. ANY SUBSTITUTION OF COMPONENTS WILL INVALIDATE
THIRDPARTY ISSUED APPROVALS AND CERTIFICATIONS, AND
MAY IMPAIR SUITABILITY FOR CLASS I, DIVISION 1 LOCATION.
The 12 Series switch utilizes a diaphragm or a piston sensor to
detect a pressure change. The response, at a predetermined set
point, actuates a SPDT or DPDT snap-acting switch, converting a
pressure signal into an electrical signal. Control set point may be
varied by turning the internal slotted adjustment screw according to
procedures outlined in Part II-Adjustments.
12 Series
Explosion-Proof, Pressure,
Vacuum, and Differential
Pressure Switches UNITED ELECTRIC
CONTROLS
Installation and Maintenance
Instructions
IMP12-16
Please read all instructional literature carefully and thoroughly before starting. Refer to the final page for the listing of Recommended
Practices, Liabilities and Warranties.
GENERAL
MISUSE OF THIS PRODUCT MAY CAUSE EXPLOSION AND PERSONAL
INJURY. THESE INSTRUCTIONS MUST BE THOROUGHLY READ AND
UNDERSTOOD BEFORE PRODUCT IS INSTALLED.
12 SERIES PRESSUREOPERATED SWITCH FOR USE IN CLASS I, GROUPS
A, B, C AND D; CLASS II, GROUPS E, F AND G; CLASS III HAZARDOUS
LOCATIONS. ENCLOSURE TYPE 4X, IP66. AMBIENT TEMPERATURE
RANGE: 50°C 58°F TO 71°C 160°F.
THIS PRODUCT IS ATEX AND IECEX CERTIFIED WITH MARKINGS LISTED
BELOW:
0539 DEMKO 08 ATEX 0717128x
II 2 G Ex db IIC T6 Gb
II 2 D Ex tb IIIC T85°C Db
IP66
-50°C < Tamb. < +80°C
IECEx UL 14.0072X
Ex db IIC T6 Gb
Ex tb IIIC T85°C Db
IP66
-50°C < Tamb. < +80°C
UE declarations and third-party issued Agency certifications are available
for download at www.ueonline.com. EACH CERTIFICATE INCLUDES LIST OF
STANDARDS THAT MUST BE FOLLOWED.
ATEX CERTIFICATE SPECIFIC CONDITIONS OF USE:
THE WIRING TO THE TEMPERATURE OR PRESSURE SWITCH MUST ONLY
BE CONNECTED IN A SAFE AREA OR BY AN APPROVED TERMINAL BOX
CERTIFIED TO EN 600790:2018, EN 600791:2014, AND EN 6007931:2014 FOR
HAZARDOUS LOCATIONS. THE EPOXY RESIN SHALL NOT BE SUBJECTED TO A
TEMPERATURE GREATER THAN 125°C. BY THE INSTALLATION THE WIRES SHALL
BE PROTECTED AGAINST MECHANICAL DAMAGE E.G. BY USE OF CONDUIT.
OPTION M515 WITH DIN CONNECTOR IS NOT COVERED BY THIS CERTIFICATE.
AN EXTERNAL EARTH SCREW IS TO BE USED M460 OPTION IF METAL CONDUIT
IS NOT USED. ELECTRICAL CONDUIT FITTING THREADED CONNECTION: M20 X
1.5, 7 THREADS MINIMUM ENGAGEMENT.
IEC CERTIFICATE SPECIFIC CONDITIONS OF USE:
THE WIRING TO THE TEMPERATURE OR PRESSURE SWITCH MUST ONLY
BE CONNECTED IN A SAFE AREA OR BY AN APPROVED TERMINAL
BOX CERTIFIED TO IEC 600790, SEVENTH EDITION, IEC 600791,
SEVENTH EDITION, AND IEC 6007931, SECOND EDITION FOR HAZARDOUS
LOCATIONS. THE EPOXY RESIN SHALL NOT BE SUBJECTED TO A TEMPERATURE
GREATER THAN 125°C. BY THE INSTALLATION THE WIRES SHALL BE PROTECTED
AGAINST MECHANICAL DAMAGE E.G. BY USE OF CONDUIT. OPTION M515
WITH DIN CONNECTOR IS NOT COVERED BY THIS CERTIFICATE. AN EXTERNAL
EARTH SCREW IS TO BE USED M460 OPTION IF METAL CONDUIT IS NOT
USED. ELECTRICAL CONDUIT FITTING THREADED CONNECTION: M20 X 1.5, 7
THREADS MINIMUM ENGAGEMENT.
DUAL SEAL
CERTIFIED
DO NOT TURN
switch housing
MOUNT VIA
pressure
connection
Figure 1
SIL2
Certified

IMP12-16
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2
Please refer to product bulletin for product specifications. Product bulletin
may be found at www.ueonline.com.
Date code format on nameplate is “YYWW” for year and week.
Part I - Installation
Tools Needed
1-1/6" Open end wrench
MOUNTING
ALWAYS LOCATE THE PRODUCT WHERE SHOCK, VIBRATION AND
AMBIENT TEMPERATURE FLUCTUATIONS ARE MINIMAL. DO NOT
MOUNT IN AMBIENT TEMPERATURE AREAS EXCEEDING 176°F 80 °C.
IF SEVERE PRESSURE SURGES ARE EXPECTED, CONSIDER THE USE OF
A PRESSURE SNUBBER.
FOR PRESSURE MODELS, MOUNT USING PRESSURE CONNECTION:
ALWAYS USE A WRENCH ON PRESSURE CONNECTION WRENCH FLAT.
(SEE FIGURE 1)
FOR DIFFERENTIAL PRESSURE MODELS, MOUNT AGAINST A
RIGID SUPPORT USING THE MOUNTING BRACKET ATTACHED TO
THE SENSOR ASSEMBLY. THEN CONNECT THE HIGH AND LOW
PRESSURE CONNECTIONS HIGH PRESSURE PORT IS ON THE LEFT,
WHEN FACING THE UNIT.
FOR ASSEMBLIES WITH JUNCTION BOXES, IT IS RECOMMENDED
THAT THE PRODUCT BE MOUNTED VERTICALLY WITH THE PRES
SURE CONNECTION DOWN.
THE PRODUCT MAY BE MOUNTED IN ANY POSITION. HOWEVER,
IF INSTALLATION LOCATION RESULTS IN FREQUENT EXPOSURE TO
LIQUID IT IS RECOMMENDED THAT THE PRODUCT BE MOUNTED VERTICALLY
WITH THE PRESSURE CONNECTION DOWN. IF PRODUCT IS TO BE SET AFTER
MOUNTING, VERIFY THAT ADJUSTMENT OPENING IS ACCESSIBLE, “FRONT”
MARKING ON NAMEPLATE MUST FACE THE OPERATOR.
NOTE: Due to product sensitivity on sensor Type W, it is recommended
that these models be mounted vertically with pressure connection facing
down. Other types of mounting may cause slight set-point shifts, which
may require readjustment.
Panel Mounting via 1/2” NPTM or M20 Electrical Connection
When panel mounting, mount through 7/8” clearance hole in panel. Use
1/2”or M20 conduit nut to secure in place. Always support the product by
holding a wrench on the hex.
TO ATTACH CONDUIT CONNECTION, HOLD ELECTRICAL CONNECTION
STEADYWITH WRENCH ON HEX, THEN THREAD ON CONDUIT.
Surface Mounting Bracket Kit (P/N 62169-13) (see Fig. 6)
Open the adjustment cover and orient the unit so that adjustment
opening will be accessible when the switch is mounted. Close the
adjustment cover ensuring that the bracket does not interfere with the
cover as this serves as the Dual Seal device method of primary seal failure
annunciation and venting. Failure to install the unit correctly with the
mounting bracket may result in improper venting of the adjustment
cover.
WIRING
DISCONNECT ALL SUPPLY CIRCUITS BEFORE WIRING PRODUCT. WIRE IN
ACCORDANCE WITH LOCAL AND NATIONAL ELECTRICAL CODES. THE WIRES
SHOULD BE PROTECTED AGAINST MECHANICAL DAMAGE BY USE OF A
CONDUIT OR OTHER SUITABLE MEANS.
ELECTRICAL RATINGS STATED IN THE LITERATURE AND PRINTED ONTO THE
PRODUCT HOUSING MUST NOT BE EXCEEDED. OVERLOAD ON A
SWITCH CAN CAUSE FAILURE ON THE FIRST CYCLE.
DIN CONNECTOR OPTION M515, FIGURE 4 IS NOT APPROVED FOR
CLASS I, DIV. 1 HAZARDOUS LOCATIONS/FLAMEPROOF ATMO
SPHERES.
1/2" NPT (male) or M20 (male) conduit connection is provided
on top of the product with 72” long, 18 AWG leadwires. The
product is available with SPDT or DPDT operation. External
grounding screw and clamp is provided with option M460
for ATEX installation with non-metallic conduit systems (See
Figure 2).
Factory Sealed Leadwires are color coded:
TERMINALS SPDT DPDT
Circuit 1 Circuit 2
Common Brown Brown Yellow
Normally Closed Red Red Black
Normally Open Blue Blue Violet
Ground Green Green
DIN Connector with 4 Male Terminals (see Figure 4)
Connector conforms to DIN 43650. Use a female mating DIN
connector (not UE supplied).
Coding: TERMINALS
Terminal #1 Common
Terminal #2 Normally Closed
Terminal #3 Normally Open
Ground
Part II - Adjustments
Tools Needed
Flathead screwdriver with 3/16”or 1/4” wide blade
1. Connect control to pressure source.
2. With power disconnected, slide cover toward electrical termina-
tions while twisting it to overcome friction.
Figure 2
Option M460 External
Grounding Screw

IMP12-16
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3
3. Connect power to terminals or leads.
4. Insert screwdriver into adjustment slot and turn clockwise to
increase setting or counter clockwise to decrease setting. (See Figure 3)
For setting on RISE, apply desired pressure and turn adjustment
clockwise until switch actuates (circuit across N.O. and COM terminals
closes).
For setting on FALL, apply pressure equal to normal system operating
pressure. Reduce source pressure to setpoint value. Turn adjustment
counter clockwise until switch actuates (circuit across N.C. and COM
terminals closes
Dimensions
Dimensional drawings for all models may be found at www.ueonline.
com
Standard Configuration
PRESSURE SWITCH / CONNECTION CHART
Dimension “A” Dimension “B” Dimension “C”
Type Description Inches mm Inches mm Inches mm
2 1/2” NPT (female) 4.4 111.1 0.7 16.5 1-1/16 27.0
3, 5 1/2” NPT (female) 4.4 111.1 0.6 15.2 1-1/16 27.0
4, 6, 8 1/4” NPT (female) 4.4 111.1 0.6 15.2 1-1/16 27.0
7, 9 1/2” NPT (female) 4.0 100.3 1.6 40.6 1-1/8 28.6
P0-P9 1/4”NPT (female) 4.4 111.1 1.0 25.4 1-1/16 27.0
W1-W2 1/2”NPT (female) 4.0 100.3 2.2 55.9 1-1/16 27.0
W3-W4 1/2”NPT (female) 4.0 100.3 1.7 42.9 1-1/16 27.0
K1-K3 1/8”NPT (female) 4.4 111.1 1.7 42.9 N/A N/A
K4-K6 1/8”NPT (female) 4.4 111.1 1.8 44.5 N/A N/A
Option Description
M511 1/4” NPT (male) 1.1 27.9 1-1/16 27.0
XP112 1/2” NPT (female) 0.6 15.2 1-1/16 27.0
XP113 1/2” NPT (female) 0.6 15.2 1-1/16 27.0
Type 2, 3, 5 Type 4, 6, 8, P0-P9 Type 7, 9
Type K4-K6
Type K1-K3
Types K1-K3 and K4-K6 shown with mounting bracket attached
A
B
DIA.
1-1/4 [31.7mm]
FACTORY SEALED
LEADWIRES 72" LG.
E/C: ST/ST
1/2 NPT OR
M20 (METRIC)
ADJUSTMENT
ACCESS COVER
WRENCH DIM “C”
SLOTTED ADJUSTMENT SCREW,
(TURN SCREW CLOCKWISE TO INCREASE SET POINT)
DIA.
1 1/4 [31.7mm]
ADJUSTMENT
ACCESS COVER
SLOTTED ADJUSTMENT SCREW,
(TURN SCREW CLOCKWISE TO INCREASE SET POINT)
FOUR TERMINAL DIN CONNECTOR
(CONFORMS TO DIN 43650, FORM A)
2-3/4 [69.7mm]
1-1/2
[38.1mm] DIA.
TERMINALS
#1 COMMON
#2 NORMALLY CLOSED
#3 NORMALLY OPEN
GROUND
Note: DoesnotmeetDiv.1or2,
or ATEX requirements.
Figure 3
Option M511
(1/4” NPT male)
Options XP112, XP113
(1/2” NPT female)
Zone Hazardous Locations Flameproof
Gap and Joint Details
Electrical conduit fitting threaded connection: M20 x 1.5, 7 threads
minimum engagement Differential Pressure Connections
Option M515 DIN Connection
Figure 4
Pressure Connections
Type W

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4
Option M421, M423 & M513 Junction Boxes
Option M430 Adjustment Cover Lock
Surface Mounting Bracket (Kit P/N 62169-13)
UNITED ELECTRIC
CONTROLS
180 Dexter Avenue, P.O. Box 9143
Watertown, MA 02471-9143 USA
Telephone: [phone] Fax: [phone]
http://www.ueonline.com
RECOMMENDED PRACTICES AND WARNINGS
United Electric Controls Company recommends careful consideration of the
following factors when specifying and installing UE pressure and temperature
units. Before installing a unit, the Installation and Maintenance instructions
provided with unit must be read and understood.
• To avoid damaging unit, proof pressure and maximum temperature limits
stated in literature and on nameplates must never be exceeded, even by
surges in the system. Operation of the unit up to maximum temperature
is acceptable on a limited basis (i.e., start-up, testing) but continuous
operation must be restricted to the designated adjustable range. Excessive
cycling at maximum temperature limits could reduce sensor life.
• A back-up unit is necessary for applications where damage to a primary
unit could endanger life, limb or property. A high or low limit switch is
necessary f or applications where a dangerous runaway condition could
result.
• The adjustable range must be selected so that incorrect, inadvertent or
malicious setting at any range point cannot result in an unsafe system
condition.
• Install unit where shock, vibration and ambient temperature fluctuations will
not damage unit or affect operation. Orient unit so that moisture does not
enter the enclosure via the electrical connection. When appropriate, this
entry point should be sealed to prevent moisture entry.
• Unit must not be altered or modified after shipment. Consult UE if
modification is necessary.
• Monitor operation to observe warning signs of possible damage to unit,
such as drift in set point or a faulty display. Check unit immediately.
• Preventative maintenance and periodic testing is necessary for critical
applications where damage could endanger property or personnel.
• For all applications, a factory set unit should be tested before use.
• Electrical ratings stated in literature and on nameplate must not be
exceeded. Overload on a switch can cause damage, even on the first cycle.
Wire unit according to local and national electrical codes, using wire size
recommended in installation sheet.
• Do not mount unit in ambient temp. exceeding published limits.
LIMITED WARRANTY
Seller warrants that the product hereby purchased is, upon delivery, free
from defects in material and workmanship and that any such product which
is found to be defective in such workmanship or material will be repaired or
replaced by Seller (Ex-works, Factory, Watertown, Massachusetts. INCOTERMS);
provided, however, that this warranty applies only to equipment found to
be so defective within a period of 36 months from the date of manufacture
by the Seller. Seller shall not be obligated under this warranty for alleged
defects which examination discloses are due to tampering, misuse, neglect,
improper storage, and in any case where products are disassembled by
anyone other than authorized Seller’s representatives. EXCEPT FOR THE
LIMITED WARRANTY OF REPAIR AND REPLACEMENT STATED ABOVE, SELLER
DISCLAIMS ALL WARRANTIES WHATSOEVER WITH RESPECT TO THE PRODUCT,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR
ANY PARTICULAR PURPOSE.
LIMITATION OF SELLER’S LIABILITY
Seller’s liability to Buyer for any loss or claim, including liability incurred in
connection with (i) breach of any warranty whatsoever, expressed or implied,
(ii) a breach of contract, (iii) a negligent act or acts (or negligent failure to act)
committed by Seller, or (iv) an act for which strict liability will be inputted to
seller, is limited to the “limited warranty” of repair and/or replacement as so
stated in our warranty of product. In no event shall the Seller be liable for
any special, indirect, consequential or other damages of a like general nature,
including, without limitation, loss of profits or production, or loss or expenses
of any nature incurred by the buyer or any third party.
UE specifications subject to change without notice.
CP04135000
M421 - EAC only
M423 - ATEX or IEC only
(Not cULus approved)
Cover not shown
M513 - cULus only; does not
meet Enclosure Type 4X
Cover not shown
1/32"
MIN. SPACE
Option M430:
Cover Lock
Adjustment
Cover
Note: A 1/32” min. space must
be maintained between the
bottom of the cover lock and
the top of the adjustment
cover to ensure proper dual
seal annunciation
and venting .
Figure 5
Mounting Bracket
Adjustment
Cover
Figure 6
Shown with Optional Cover
Lock (M430)
1/2” NPT (Female)
Ports, 2 PLCS
External
Ground
Screw
Internal Ground Screw
No Access
Sealed Port
1/2” NPT (Male)
Conduit Plug 10mm
HEX Drive
4” [102mm]
4”
[102mm]