UE 12 Series User manual

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1
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.
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 TEM-
PERATURE FLUCTUATIONS ARE MINIMAL. DO NOT MOUNT IN AMBIENT TEMPERA-
TURE 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)
12 Series
Explosion-Proof, Pressure,
Vacuum, and Differential
Pressure Switches UNITED ELECTRIC
CONTROLS
Installation and Maintenance
Instructions
IMP12-14
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.
THIS PRODUCT IS SUITABLE FOR USE IN CLASS I, DIVISIONS 1 & 2, GROUPS
A, B, C AND D; CLASS II, DIVISIONS 1 & 2, GROUPS E, F AND G; CLASS III; OR
NON-HAZARDOUS LOCATIONS ONLY. -50 °C (-58 °F) ≤ Tamb. ≤ 80 °C (176
°F), ENCLOSURE TYPE 4X.
THIS PRODUCT IS ATEX AND IECExCERTIFIED FOR EQUIPMENT CATEGORY
2. SUITABLE FOR APPROPRIATE USE IN GAS ZONE 1 AND DUST ZONE 21
APPLICATIONS.
EN 60079-0:2012, EN 60079-
1:2007, EN 60079-31:2009
IEC 60079-0:Ed.6, IEC 60079-
1:Ed.6, IEC 60079-31:Ed.2
0539 DEMKO 08 ATEX 0717128x
II 2 G Ex d IIC T6 Gb
II 2 D Ex tb IIIC T80°C Db
IP66
-50°C < Tamb. < +80°C
IECEx UL 14.0072X
Ex d IIC T6 Gb
Ex tb IIIC T80°C Db
IP66
-50°C < Tamb. < +80°C
UE declarations and third-party issued Agency certifications are available for
download at www.ueonline.com.
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.
DUALSEAL
CERTIFIED
DO NOT TURN
switch housing
MOUNT VIA
pressure
connection
Figure 1

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2
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 PRESSURE 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 STEADY WITH
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 ATMOSPHERES.
FOR ATEX INSTALLATION, AN EXTERNAL GROUNDING SCREW (OPTION M460)
IS REQUIRED FOR NON-METALLIC CONDUIT SYSTEMS. (SEE FIGURE 2)
FOR ATEX INSTALLATION IN HAZARDOUS LOCATIONS, THE WIRING TO THE
PRESSURE SWITCH MUST ONLY BE CONNECTED IN THE SAFE AREA OR BY AN
APPROVED TERMINAL BOX CERTIFIED TO EN STANDARDS 60079-0:2012,
60079-1:2007, 60079-31:2009, 60079-7:2007, IEC 60079-0:ED.6, IEC
60079-1:ED.6, IEC 60079-31:ED.1, IEC 60079-7:ED.4
1/2" NPT (male) or M20 (male) conduit connection is provided on top of the prod-
uct 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 sup-
plied).
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 terminations while twisting
it to overcome friction.
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).
Zone Hazardous Locations Flameproof
Gap and Joint Details
Electrical conduit fitting threaded connection: M20 x 1.5, 7 threads minimum engage-
ment
Figure 2
Option M460 External
Grounding Screw

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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
M521 LF4 Autoclave 1/4” (female) 1.2 29.7 1-1/16 27.0
M522 LM4 Autoclave 1/4” (male) 1.4 34.8 1-1/16 27.0
M523 LF6 Autoclave 3/8” (female) 1.4 36.1 1-1/16 27.0
M524 LM6 Autoclave 3/8” (male) 1.5 38.4 1-1/16 27.0
M525 HF4 Autoclave 1/4” (female) 1.2 29.7 1-1/16 27.0
M526 HM4 autoclave 1/4” (male) 1.3 32.8 1-1/16 27.0
M527 HF6 Autoclave 3/8” (female) 1.4 36.1 1-1/16 27.0
M528 HM6 Autoclave 3/8” (male) 1.5 37.6 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
XP114 1/4” NPT (female) 0.6 15.2 1-1/16 27.0
XP115 1/4” 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
Options M522,
M524, M526,
M528
MALE AUTOCLAVE FEMALE AUTOCLAVE
Note: Does not meet Div. 1 or 2,
or ATEX requirements.
Figure 3
Option M511
(1/4” NPT male)
Options XP112, XP113
(1/2” NPT female)
Options XP114, XP115
(1/4” NPT female)
Differential Pressure Connections
Option M515 DIN Connection
Figure 4
Pressure Connections
Options M521,
M523, M525,
M527
Type W

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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 for
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 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 an-
nunciation and venting.
Figure 5
Mounting Bracket
Adjustment
Cover
Figure 6
Shown with Optional Cover
Lock (M430)
3/4-NPT (Male) Con-
duit Plug, 1/2”
Square Socket
3/4-14 NPT
(Female) Port,
2 PLCS
Internal Ground
Screw
5 9/6” [141mm]
Ø21/64
[8.33 mm]
6 5/16”
[160mm]
3 3/32”
[79mm]
Typ.
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]