UE H400 User manual

GENERAL
Pressure variations are sensed by a bellows, diaphragm or piston sensor
which either actuates or de-actuates one, two or three snap-acting switches
at a pre-determined set point(s). Set point(s) is adjusted by turning an
internal knob and pointer (H types) or internal screw (J types).
Tools Needed
Screwdriver
Hammer
Adjustable wrench
MOUNTING
INSTALL UNIT WHERE SHOCK, VIBRATION AND TEMPERA-
TURE FLUCTUATIONS ARE MINIMAL. ORIENT UNIT SO THAT
MOISTURE IS PREVENTED FROM ENTERING THE ENCLO-
SURE. IF UNIT IS BEING INSTALLED WHERE HEAVY CONDENSATION
IS EXPECTED, VERTICAL MOUNTING (PRESSURE CONNECTION
DOWN) IS REQUIRED. DO NOT MOUNT UNIT IN AMBIENT TEMPERA-
TURES EXCEEDING PUBLISHED LIMITS.
400 Series pressure controls can be mounted in any position, provided the
electrical conduit is not facing up. The preferred mounting position is ver-
tical (pressure connection down).
The cast-in knockouts for 3/4” electrical conduit are located on the side
and rear of the enclosure. These can easily be knocked out by placing the
blade of a screwdriver in the groove and rapping sharply with a hammer.
Mount the unit via the (2) 1/4” screw clearance holes on the enclosure.
See Dimensions. Units may also be mounted via the NPT pressure con-
nection.
ALWAYS HOLD A WRENCH ON THE PRESSURE HOUSING HEX
WHEN MOUNTING UNIT. DO NOT TIGHTEN BY TURNING
ENCLOSURE. THIS WILL DAMAGE SENSOR AND WEAKEN
SOLDER OR WELDED JOINTS.
UNITED ELECTRIC
CONTROLS
Installation and Maintenance
Instructions
IMP400-07
Please read all instructional literature carefully and thoroughly before starting. Refer to the final page for the listing of Recommended Practices,
Liabilities and Warrantees.
400 Series
Pressure Controls
Types: H400, H402, H403,
H400K, H402K, J400, J402,
J403, J400K, J402K
Part I - Installation
WIRING
DISCONNECT ALL SUPPLY CIRCUITS BEFORE WIRING.
ELECTRICAL RATINGS STATED IN LITERATURE AND ON NAME-
PLATE SHOULD NEVER BE EXCEEDED. OVER-LOAD ON A
SWITCH CAN CAUSE FAILURE ON THE FIRST CYCLE.
WIRE UNITS ACCORDING TO LOCAL AND NATIONAL ELECTRI-
CAL CODES. MAXIMUM RECOMMENDED WIRE SIZE IS 14 AWG.
Connect conduit to the case and wire directly to the switch terminals accord-
ing to local and national electrical codes. Bring the wires up to terminals
from the rear of the case. (See fig. 1.) If manual reset switch or DPDT options
are used, lead wires are supplied, color coded as follows:
ALLOW ENOUGH SLACK SO AS NOT TO AFFECT SWITCH MOVE-
MENT WHEN MAKING SETTING ADJUSTMENTS AND ENSURE
THAT THE WIRES ARE NOT TOUCHING THE COVER WHEN
INSTALLED.
NOTE: For larger wire gauges, a one time shift may be experienced or
expected due to space limitations within the enclosure. Verify setpoint after
installation.
NOTE: The middle switch assembly is omitted for dual switch controllers.
The outer switch assemblies are omitted for single switch controllers. Type
“J” controls have internal screw adjustments and type “H” have cam assem-
blies for internal calibrated adjustments.
Switch 1 Switch 2
Common Violet Yellow
Normally Open Blue Orange
Normally Closed Black Red
Figure 1

Special Instructions For Vacuum Ranges
On vacuum ranges, the C-NO circuit is closed at sea level condi-
tions. Therefore, increasing vacuum will cause the C-NC circuit to
close while decreasing vacuum will cause the C-NO circuit
to close. Please make a note of this and wire/adjust the unit
accordingly.
Tools Needed
Screwdriver
NOTE: For set point adjustments and re-calibration, connect
control to a calibrated pressure gauge.
Type J400 & J400K
Remove cover. Switch has screw adjustments inside enclosure.
Increase gauge pressure until switch transfers. To RAISE the
pressure setting turn the screw IN To LOWER the pressure setting
turn the screw OUT. One full turn corresponds to approximately
10% of range on diaphragm and piston models, and approximately
20% of range on bellows models. When making adjustments, do
not exceed the proof* pressure rating on nameplate.
Types J402, J403 & J402K
Remove cover, follow same procedure as paragraph above.
Switches may be set together or apart, up to 100% of range
(maximum separation on models 520-535 is defined in Table 1).
On dual switch, either switch may be set high. On triple switch
models, the third (middle) switch has no over-travel mechanism
and must always be set to the highest pressure when switches are
set apart. Altering the setting of one switch will usually have little
effect on the other(s), however re-calibration may be desired at a
critical pressure setting and after changing switch(es).
Table 1
Special Instructions for Models 520-535
When calibrating the Models 520-535, Switch 2 (the right switch
as viewed from the front of the control) must be set to the higher
pressure value. Use a screwdriver to turn the adjustment screw and
obtain the desired actuation pressure for Switch 2. Switch 1 can
then be set following the procedure outlined for the Type J400 and
J400K. Maximum separation between Switch 1 and 2 is
defined in Table 1.
Types H400, H402, H403, H400K & H402K
Remove cover, switch has knob and pointer adjustment inside
enclosure. Controls are factory calibrated for maximum accuracy at
the dial midpoint. Switches may be set together or apart up to
100% of the range scale. On dual switch models either switch may
be set high. On triple switch models, the third (middle) switch has
no over-travel mechanism and must always be set to the highest
pressure when the switches are set apart. Altering the setting of one
switch will usually have little effect on the other(s), however
re-calibration may be desired at a critical setting or after
changing switch(es).
To re-calibrate, turn pointer to desired set point and add gauge
pressure until switch transfers. If gauge pressure and set point
pressure do not agree, turn zero adjust screw clockwise to raise and
counter clockwise to lower pressure setting (See Figure 2).
Types with Manual Reset (Option 1530)
These optional models incorporate a snap switch that, when actuat-
ed, remains tripped until pressure decreases and the reset button is
manually depressed to the reset position.
Types J400K & J402K with Option M210
(indicator models 147, 157, S147B, S157B only)
To adjust for maximum accuracy at any desired set point, follow
steps 1 - 4 below:
SPAN ADJUSTMENT
1) Remove front window and gasket (four screws)
to gain access to span adjustment.
2) Connect control to calibrated pressure source and set to
required differential pressure.
3) Using a screwdriver, carefully turn span adjustment
(See Figure 3) to obtain required indication.
4) Re-mount front gasket and window.
Tools Needed
Screwdriver
USE ONLY FACTORY AUTHORIZED REPLACEMENT PARTS
AND PROCEDURES. DISCONNECT ALL LIVE CIRCUITS
BEFORE PROCEEDING. COMPONENTS AVAILABLE FOR
REPLACEMENT ARE THE SWITCHES. OTHER COMPONENTS
FACTORY REPLACEABLE ONLY.
Part III - Replacements
Part II - Adjustments
Switch Separation
Model & Range (% of Range Span)
520, 530 (-300 to 0 VAC) 25%
521, 531 (-10 to +10 "wc) 35%
522, 532 (-50 to +50 "wc) 35%
523, 533 (0.5 to 5 "wc) 50%
524, 534 (2.5 to 50 "wc) 50%
525, 535 (10 to 250 "wc) 20%
*Subjecting the switch to proof pressure may cause a shift in set point
REPLACEMENT OF SWITCH(ES)
1) Disconnect leadwires.
2) Remove the two mounting screws. On multi-switch
controls, first remove switch bias springs (See Figure 1.)
3) Insert replacement switch and replace screws
and bias springs.
4) Check switch set point and re-calibrate per
PART II if necessary.

Dimension A
Models Inches mm NPT Models Inches mm NPT
Pressure Pressure
126-164 5.81 146,84 1/4 551, 553-555 4.56 115,88 1/4
S126B-S164B 6.19 157,16 1/2 550, 552 5.03 127,79 1/4
270-376 5.50 139,70 1/4 570-572 4.56 115,89 1/4
440-443, 449, 610-614 6.44 163,58 1/4
451, 453, 454 4.28 108,74 1/4 Differential Pressure
448, 450, 452 5.03 127,79 1/4 147-157 6.13 155,57 1/4
520-525 8.62 218,90 1/2 S147B-S157B 6.13 155,57 1/2
530-535 8.12 206,20 1/2 455-559 7.00 178,05 1/4
540-543 7.90 200,7 1/8
544-547 8.06 204.7 1/8
Option M210 - Differential Pressure Indication
Surface Mounting Hardware
Part Number 6361-704º
Dimensions
Figure 3 Span Adjust Screw
Figure 2
Zero Adjust Screw
Re-Calibration Adjustment - H Types

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.
LIMITED 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 defec-
tive in such workmanship or material 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 war-
ranties 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.
180 Dexter Avenue, P.O. Box 9143
Watertown, MA 02472-9143 USA
Phone: [phone]
Fax: [phone]
http://www.ueonline.com
UNITED ELECTRIC
CONTROLS
INTERNATIONAL OFFICES
AUSTRALIA
United Electric Controls, (Aust) PTY Ltd.
ACN 004 949 982, Unit 2
615 Warrigal Rd. (Locked Bag 600)
Ashburton, Victoria 3147, Australia
Phone: [phone]
FAX: [phone]
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G. Van Gervenstraat 19A
B-9120 Beveren-Waas, Belgium
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United Electric Controls, Canada Ltd.
5320 Bradco Blvd. Mississauga,
Ontario L4W 1G7, Canada
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GERMANY
United Electric Controls, Europe
An Der Zentlinde 21
D-64711 Erbach, Germany
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INDIA
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Amar Hill, Saki, Vihar Road
Powai, Mumbai 400 072, India
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No. 1-2-2, 2nd Floor
Jalan 4/101C
Cheras Business Centre
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Unidad Nacional 89410
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