United Electric Controls J21K Series Installation And Operation Instruction

Installation and Operation Instructions
Please read all instructional literature carefully and thoroughly before starting.
GENERAL
MISUSE OF THIS PRODUCT MAY CAUSE DAMAGE TO
EQUIPMENT OR PERSONAL INJURY. THESE INSTRUCTIONS
MUST BE THOROUGHLY READ AND UNDERSTOOD BEFORE
DEVICE IS INSTALLED.
Cert number
E42272-19910117
Applicable Area
North America
Markings
UL Listed
Applicable Standards
UL 508; CSA C22.2 No. 14
Cert number
DEMKO 11 ATEX 1105261X (M405 option only)
Applicable Area
Europe (EU)
II 1 G Ex ia IIC T6 Ga
Markings
-50 °C ≤ Ta ≤ +60 °C
Applicable Standards
EN IEC 60079-0; EN 60079-11
Cert number
IECEx UL 14.0075X (M405 option only)
Applicable Area
International
Ex ia IIC T6 Ga
Markings
-50 °C ≤ Ta ≤ +60 °C
Applicable Standards
IEC 60079-0; IEC 60079-11
ATEX AND IEC SPECIFIC CONDITIONS OF USE: ENCLOSURE
CONTAINS ALUMINUM. CARE MUST BE TAKEN TO AVOID
IGNITION HAZARD DUE TO IMPACT OR FRICTION.
THIS PRODUCT DOES NOT HAVE ANY FIELD REPLACEABLE
PARTS. ANY SUBSTITUTION OF COMPONENTS SHALL
INVALIDATE AGENCY CERTIFICATION(S).
PRIOR TO INSTALLATION, CHECK THE WETTED PARTS
MATERIAL FOR COMPATIBILITY TO THE PROCESS MEDIA.
The J21K Diff erential Pressure Switch utilizes opposing
metal bellows to detect pressure diff erences between
two pressure sources. When the pressure at the
high port exceeds the pressure at the low port by a
pre-determined amount (set point), the mechanism
operates a single snap-action electrical switch. Control
set point may be adjusted by turning the internal
adjustment hex screw (See Adjustments – Part II).
J21K Series
Diff erential Pressure Switch
DUAL SEAL
CERTIFIED
Refer to the final page for the Warranty.
DIFFERENTIAL PROOF PRESSURE * LIMITS LISTED ON
NAMEPLATE MUST NEVER BE EXCEEDED, EVEN BY SURGES
IN THE SYSTEM. OCCASIONAL OPERATION OF UNIT UP
TO DIFFERENTIAL PROOF PRESSURE IS ACCEPTABLE,
E.G., START-UP AND TESTING. CONTINUOUS OPERATION
SHOULD NOT EXCEED THE DESIGNATED MAXIMUM
WORKING PRESSURE ** RANGE.
* Diff erential Proof Pressure - the maximum diff erential pressure
to which pressure sensors may be occasionally subjected, which
causes no permanent damage (e.g., start-up, testing). The unit may
require re-gapping (consult factory for re-gapping procedure).
** Working Pressure Range - the pressure range in which two op-
posing sensors can be safely operated and still maintain set point
provided the diff erence in pressure between the low and high sides
does not exceed the designated adjustable range.
DEVICE MUST NOT BE ALTERED OR MODIFIED AFTER
SHIPMENT. CONSULT UE IF MODIFICATION IS NECESSARY.
Please refer to product datasheet at www.ueonline.com
for product specifi cations. Date code format on nameplate
is YYWW for year and week.
Part I - Installation
Mounting
• Screwdriver
• Wrench
INSTALL DEVICE WHERE SHOCK, VIBRATION AND
TEMPERATURE FLUCTUATIONS ARE MINIMAL. DO NOT
INSTALL DEVICE IN AMBIENT TEMPERATURES THAT EXCEED
PUBLISHED LIMITS ON THE NAMEPLATE.
MOUNT USING A WRENCH ON LOW AND HIGH SIDE PRESSURE
CONNECTION HEX OR MOUNT AGAINST A RIGID SUPPORT
THEN CONNECT LOW AND HIGH PRESSURE PORTS.
DEVICE SHOULD BE MOUNTED TO PREVENT MOISTURE FROM
ENTERING THE ENCLOSURE.
Surface mount in any position via two mounting ears.
Never turn this unit by grasping enclosure. Always
hold a wrench on the bellows housing (or fi tting) when
connecting pressure joints.
1 IMJ21K 09