United Electric Controls 100 Series User manual

sure connection. Low pressure and differential pressure units, models
520-535, 540-543, 544-548, are also available with an optional
surface mounting bracket. Should the control be installed where con-
densation is expected, vertical mounting is recommended as a means of
keeping water away from switch terminals.
Never use the enclosure for leverage to hand tighten the pressure con-
nection. Always use a wrench to tighten the pressure connection to the
pipe.To prevent damaging the pressure sensor, use a back-up wrench
to hold the hex nut in place when surface mounting.
On models supplied with an external manual reset button, be sure to
leave sufficient finger space over the reset button for the operator to
reset the control. See Mounting Diagram.
WIRING
DISCONNECT ALL SUPPLY CIRCUITS BEFORE WIRING.
ELECTRICAL RATINGS STATED IN LITERATURE AND ON
NAMEPLATES SHOULD NEVER BE EXCEEDED. OVERLOAD
ON A SWITCH CAN CAUSE FAILURE ON THE FIRST CYCLE.
WIRE UNITS ACCORDING TO NATIONAL AND LOCAL ELECTRICAL
CODES. MAXIMUM RECOMMENDED WIRE SIZE IS 14 AWG.
Remove the two screws retaining the cover and cover gasket. A 1/2” NPT
conduit connection is provided on the left hand side of the enclosure.
Two cast-in knockouts for the 1/2” conduit are located on the side and
back of the enclosure. These can easily be knocked out by placing
the blade of a screwdriver in the groove and tapping sharply with a
hammer. The three switch ter minals are clear ly labeled
“common”, “nor mally open” and “nor mally closed”. For
optional switches supplied with leadwires, the following color
coding applies:
Manual DPDT
Reset
(Option 1530) (Option 1010)
SPDT SWT1 SWT2
Common Violet Violet Yellow
Normally Open Blue Blue Orange
Normally Closed Black Black Red
GENERAL
BEFORE INSTALLING, CHECK THE SENSOR MODEL SELECTED
FOR COMPATIBILITY TO THE PROCESS MEDIA IN CONTACT WITH
THE SENSOR AND WETTED PARTS.
The H100 and H100K differential pressure switches are activated when
a bellows, diaphragm or piston sensor responds to a pressure change.
This response, at a pre-determined set point, actuates a single snap-
acting switch, converting the pressure signal into an electrical signal.
Control set point may be varied by turning the internal adjustment hex.
(See Adjustment -PART II).
PROOF PRESSURE* LIMITS STATED IN THE LITERATURE AND ON
NAMEPLATES MUST NEVER BE EXCEEDED, EVEN BY SURGES
IN THE SYSTEM. OCCASIONAL OPERATION OF UNIT UP TO
PROOF PRESSURE IS ACCEPTABLE (E.G., START-UP, TESTING).
CONTINUOUS OPERATION SHOULD NOT EXCEED THE DESIGNATED OVER
RANGE PRESSURE.
*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 unit may require re-gapping.
Tools Needed
Adjustable Wrench
Screwdriver
Hammer (for alternate wire knockouts)
MOUNTING
INSTALL UNIT WHERE SHOCK, VIBRATION AND TEMPERATURE
FLUCTUATIONS ARE MINIMAL. ORIENT UNIT SO THAT MOIS-
TURE IS PREVENTED FROM ENTERING THE ENCLOSURE. IF
UNIT IS BEING INSTALLED WHERE HEAVY CONDENSATION IS EXPECTED,
VERTICAL MOUNTING (PRESSURE CONNECTION DOWN) IS REQUIRED. DO
NOT MOUNT IN AMBIENT TEMPERATURES EXCEEDING PUBLISHED LIMITS.
Controls may be mounted and operated in any
position. They may be surface mounted via the two mounting ears on
either side of the enclosure, or directly to a rigid pipe by using the pres-
100 Series
Type H100
(Pressure Switch)
Type H100K
(Differential Pressure)
IMP100-07
Please read all instructional literature carefully and thoroughly before starting. Refer to the final page for the listing of Recommended
Practices, Liabilities and Warranties.
Part I - Installation
UNITED ELECTRIC
CONTROLS
Installation and Maintenance
Instructions

IMP100-07
Models Flats Approx. Gap
171-174 2-2 1/2 .0085 to .0105”
183-194 1-1 1/2 .004 to .006”
483-494 1-1 1/2 .004 to .006”
358-376 5-6 .020 to .025”
700-706 3 1/2 - 4 .014 to .017”
521-525 2-2 1/2 .0085 to .0105”
15737 5-6 .020 to .025
531-535 2-2 1/2 .0085 to .0105”
540-548 2-2 1/2 .0085 to .0105”
560-567 1-1 1/2 .004 to .006”
15623 5-6 .020 to .025”
15731-15736 5-6 .020 to .025
A grounding screw and clamp (cast in symbol) is provided which meets
a 35 lb. pull test. Keep the wire as short as possible to prevent inter-
face with the plunger and the optional adjustable differential switch
wheel, if applicable.
Tools Needed
5/8” Open End Wrench
1/4” Wrench
3/16” Wrench
SOME MODELS HAVE A TWO-PIECE, ADJUSTABLE PLUNGER. THIS
FEATURE IS CHARACTERIZED BY A 3/16” HEX HEAD SCREW
INSTALLED IN THE 1/4” HEX PLUNGER. THE LENGTH OF THIS
ASSEMBLY IS ADJUSTED AT OUR FACTORY AND IS CRITICAL TO THE
FUNCTION OF THE CONTROL.
H100 and H100K
Remove pressure switch cover. Loosen Phillips screw adjustment lock.
Adjust set point by turning 5/8” hex adjustment screw clockwise (left) to
raise set point, or counter clockwise (right) to lower set point. Tension
on adjustment screw can be increased by tightening adjustment lock
onto it. (See diagram 1). Controls include uncalibrated reference scales
for high, low or mid range settings.
Adjustable Differential Models
Model 15623, 15731-15737, and control types with option code 1519
incorporate a snap switch with internal adjustment wheel. Turning this
wheel raises or lowers the pressure rise set point. The fall set point
remains constant. Consult factory for additional information.
Manual Reset Button
Control types with option code 1530 incorporate a snap switch which
when actuated, remains actuated until the pressure drops sufficiently
to allow the reset button (located on top of the control) to be manually
depressed to reset the switch.
Gapping
1) Loosen adjustment lock.
2) Turn 5/8” hex adjustment screw clockwise (left), to approximately
mid range. This puts a load on the sensor and exposes the plunger
flats. Using a 1/4” wrench on the plunger and a 3/16” wrench on the
plunger hex screw, turn hex screw counter-clockwise (right) from plung-
er until switch actuates. If switch is already actuated, turn plunger hex
screw clockwise (left), until switch deactuates. Turn hex screw clock-
wise (left) from this point. (See chart 1 for Flats and approximate Gap.)
3) Check set point per above.
4) Connect wires and replace cover securely.
Part II - Adjustments
Diagram 1
Chart 1
- DO NOT
ADJUST
Set-point

IMP100-07
Models 171-174,
471-474
Models 183-186,
483-486
Models 188-194.
488-494
Dimensions
Models 218-376,
610-706, 15623, 15731-15736
Models 520-525 Models 530-535, 15737
Dimension A
Model Inches mm NPT
171-174 7.50 190,5 1/2”
183-186 7.56 192,0 1/2”
188,189 6.62 168,1 1/2”
190-194 6.63 168,4 1/2”
218-274 6.56 166,6 1/4”
358-376 7.03 178,6 1/4”
483-486 7.56 192,0 1/2”
488,489 6.62 168,1 1/2”
490-494 6.63 168,4 1/2”
520-525 8.44 214,4 1/2”
530-535 8.00 203,2 1/2”
540-548 8.34 211,8 1/8”
560-564 6.62 168,1 2” Sanitary fitting
565-567 6.62 168,1 1 1/2” Sanitary fitting
610-616 7.00 177,8 1/4”
680 6.97 177,0 1/4”
701-706 6.57 166,9 1/4”
15623 6.57 166,9 1/4”
15731-15736 6.57 166.9 1/4”
15737 8.00 203.2 1/2”

IMP100-07
SP110710000
Model 540-543
Models 544-548
Models 560-564
Models 565-567
Dimensions
UNITED ELECTRIC
CONTROLS
180 Dexter Ave. P.O. Box 9143, Watertown, MA 02472-9143 USA
617 926-1000 Fax [phone]
www.ueonline.com
RECOMMENDED PRACTICES AND WARNINGS
United Electric Controls Company recommends careful consideration of the fol-
lowing 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 pressure or temperature is accept-
able on a limited basis (e.g., start-up, testing) but continuous operation must be
restricted to the designated adjustable range. Excessive cycling at maximum pres-
sure or 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 mali-
cious 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. When applicable, orient unit so that mois-
ture does not enter the enclosure via the electrical connection. When appropri-
ate, this entry point should be sealed to prevent moisture entry.
• Unit must not be altered or modified after shipment. Consult UE if modifica-
tion is necessary.
• Monitor operation to observe warning signs of possible damage to unit, such
as drift in set point or faulty display. Check unit immediately.
• Preventative maintenance and periodic testing is necessary for critical applica-
tions where damage could endanger property or personnel.
• 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 24 months from the date of manufacture by the Seller. Seller shall not be obli-
gated 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.