RECOMMENDED PRACTICES
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 max
temperature limits stated in literature and on nameplates
must never be exceeded, even by surges in the system.
Operation of the unit up to proof pressure or max 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 proof pressure or 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
dangerous runaway condition could result.
• The adjustable range must be selected so that incorrect,
inadvertent or malicious setting at any range point can not
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.
• 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. Check unit immediately.
• Preventative maintenance/periodic testing is necessary for critical
applications where damage could endanger property/ 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, possible on the
first cycle. Wire unit according to local and national electrical codes,
using wire size recommended in installation sheet.
• Use only factory authorized replacement parts and procedures.
• Do not mount unit in ambient temp. exceeding published limits.
• For remote mounted temperature units, capillary lengths
beyond 10 feet can increase chance of error, and may
require re-calibration of set point and indication.
LIMIT WARRANTY
UE warrants that the product thereby 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 mater-
ial will be repaired or replaced by UE (F.O.B. UE); provided, however,
that this warranty applies only to equipment found to be so defective
within a period of 12 months after installation by buyer but not to
exceed 18 months after delivery by the seller. Except for the limited
warranty of repair and replacement stated above, UE disclaims
all warranties whatsoever with respect to the product, including
all implied warranties of merchantability or fitness for any
particular purpose.
LIABILITY LIMITATION
The sole and exclusive remedy of buyer for any liability or seller
for any claim, including 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 imputed to seller,
is limited to the limited warranty or repair and replacement stated
herein. In no event shall the seller be liable for any special, indirect,
consequential or other damages or 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.
UNITED ELECTRIC CONTROLS
P.O. Box 9143, Watertown, MA 02272-9143 USA
617 926-1000 Fax 617 926-2568
MAP5M1296
Gapping
Turn 7/8” DIA. slotted adjustment screw in approxi-
mately to mid range. (Approximately 1/4” of hex
plunger should be exposed.) This puts a load on the
sensor. Using a 3/16” wrench on the plunger hex
screw and a 1/4” wrench on the plunger hex, turn hex
screw out until switch actuates. (If switch is already
actuated, proceed to next step.) Turn hex screw in
until switch just transfers. Continued to turn hex screw
in per instructions below, depending on model.
Models 701-708, 377, 521-525,
531-535, 171- 174, and 471-474
Turn hex (IN) an additional 2 flats from this point
(approximately 1/3 turn). This will provide a 9-11
mil gap.
Models 358-376
Turn hex (IN) 3 flats from this point (approximately 1/2
turn). This will provide for a 14-16 mil gap.
Models 183-189, 190-194, 483-489, 490-494
Turn hex (IN) 1 flat from this point. This will provide a
4-7 mil gap.
Models 520, 530
Vacuum range. Switch should be in actuated position
with no gap.
6. Re-calibrate per PART II.
Thermal Assembly Replacement
1. Turn controls upside down and remove 4
slotted thermal assembly mounting screws.
2. Remove thermal assembly and mounting
plate being sure to leave plunger in place.
3. Position new thermal assembly and
mounting plate to bottom of control and hold
while affixing 4 mounting screws.
4. Re-calibrate per PART II.
