Dwyer Instruments SA1100 Operating Manual

ulletin IN-1100

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Series SA1100 Pressure Switches Weatherproof, Explosion-Proof

Specifications - Installation and Operating Instructions

eries SA1100 Pressure Switches actuate one or two single pole, double throw

S

SPDT) snap switches in response to increasing or decreasing pressure of

(

ompatible gases or liquids. Three field adjustable operating ranges are available

c
allowing setpoints up to 500 psig (35 kg/cm
suitable for hazardous locations as detailed in the chart at lower right. Read and
understand these instructions completely before proceeding with installation or
operation.

2

). All models are weather-proof and

SPECIFICATIONS
Temperature Limits: -30 to 180°F (-35° to 82°C) standard.

ATEX and IECEx compliant at Ambient Temperature -4 to 146°F (-20 to 63.6°C).

rocess Temperature: -4 to 146°F (-20 to 63.6°C).

P

aximum Operating Pressure: 1200 psig (82.6 bar).

M
Maximum Pressure Without Bursting: 3000 psig (210 kg/cm

rocess Connection: 1/4˝ or 1/2˝ female NPT.

P

lectrical Ratings: SPDT or DPDT contacts rated 15A @ 125/250/480 VAC (V~),

E

/8 HP @ 125 VAC (V~), 1/4 HP @ 250 VAC (V~), 1/2A @ 125 VDC (V ) resistive,

1
1/4A @ 250 VDC (V ) resistive.

Wiring Connections: 3 screw type.
Conduit Connections: 3/4˝ female NPT.
Setpoint Adjustment: 7/16˝ hex nut, field adjustable.
Housing Material: Die cast aluminum.
Finish: Textured gray polyurethane.
Connection Material: Aluminum, brass or 316SS.
Diaphragm: Buna-N or fluorocarbon.
Weight: 3-1/2 lbs. (1.59 kg).
Enclosure Ratings: Weatherproof and Explosion-proof. Listed with UL and CSA for

Class I, Groups B, C and D; Class II Groups E, F and G. UL-NEMA 4X, CSA-NEMA

4. ATEX Compliant 0518 II 2 G Ex d IIC T6 Gb -20 ≤ Tamb ≤63.6°C. Process
Temperature ≤63.6°C. Type Certificate No.:KEMA 04ATEX2186 X. IP56 without
drain and IP 54 with drain. ATEX Standards: EN 60079-0: 2009; EN60079-1: 2007.
IECEx Certified: For Ex d IIC T6 Gb -20 ≤ Tamb ≤63.6°C Process Temperature
≤63.6°C. IECEx Certificate of Conformity: IECEx DEK 11.0095 X; IECEx Standards:
IEC 60079-0: 2007; IEC 60079-1: 2007.

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).

MODEL CHART - SERIES SA1100

Example

Construction

Adjustable

Pressure

Ranges

Circuit
(Switch)
Options

Pressure

Chamber

Material

Diaphragm

Material

Circuit

(Switch) Type

Process

Connection

Options

*Options that do not have ATEX and IECEx.

Attention: Units without the “AT” suffix are not Directive 2014/34/EU (ATEX) compliant. These units are not intended for use in potentially hazardous atmospheres in the EU.
These units may be CE marked for other Directives of the EU.

SA11

SA11

E

13

11
12
13

A

E

HS
HG

A
B
S

1

4

K

4
5

K
L

SA1113E-A4-K1 Pressure Control; weatherproof, NEMA 4X, explosion-proof NEMA 7 & 9; aluminum pressure chamber,
Buna-N diaphragm and O-ring; 1/4˝ female NPT process connection; adjustable deadband, automatic reset; SPDT snap
acting switch; adjustable range 30-500 psig.
Series Designator, weatherproof NEMA 4X, explosion-proof NEMA 7, 9
10 - 150 psig (0.7 - 10 bar)
20 - 250 psig (1.4 - 17.2 bar)
30 - 500 psig (2.0 - 34.0 bar)
Snap action switch rated 15A @ 125/250/480 VAC, 1/8 HP @ 125 VAC,
1/4 HP @ 250 VAC, 1/2 A @ 125 VDC resistive, 1/4 A @ 250 VDC resistive.
Hermetically sealed snap action switch rated 5 A@ 125/250 VAC, 5 A resistive @ 30 VDC*
Hermetically sealed snap action switch with gold contacts rated 1 A @ 125 VAC, 1 A resistive @ 30 VDC*
Aluminum
Brass
316SS
Buna-N diaphragm and O-ring
Fluorocarbon diaphragm and O-ring
SPDT
DPDT (not available with HS or HG switch options)

1

1/4˝ female NPT

2

1/2˝ female NPT
ATEX certified construction.

AT

IEC IECEx certified construction

IEC

Housing with drain - allows condensate to be drained from inside enclosure (meets NEMA 3R instead of 4X)

DR

MERCOID DIVISION

MERCOID DIVISION

DWYER INSTRUMENTS, INC. Fax: [phone] e-mail: [e-mail]

DWYER INSTRUMENTS, INC. Fax: [phone] e-mail: [e-mail]
P.O. BOX 258 • MICHIGAN CITY, INDIANA 46360, U.S.A.

P.O. BOX 258 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Phone: [phone] www.dwyer-inst.com

Phone: [phone] www.dwyer-inst.com

INSTALLATION

1. Location: Select a location where the temperature limits of -30 to 180°F (-35 to

82°C). For standard units and -4 to 146°F (-20 to 63.6°C) for ATEX and IECEx units

ill not be exceeded. Locate the switch as close as possible to the pressure source

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or best response. Long lengths of piping will not affect the accuracy of the

f

ctuation point but will increase response time.

a

2. Mounting: Avoid mounting surfaces with excess vibration which could cause
false actuation when pressure is near setpoint. Attach switch with two 3/16” screws
or bolts (not included) through mounting bracket. The switch must be mounted

ithin 20° of vertical for proper operation.

w

. Pressure Connection: The pressure connection is standard 1/4˝ or 1/2˝ female

3

PT. Pipe joint sealing material should be used to insure a pressure tight joint.

N

CAUTION

isconnection, delay 2 minutes before opening. Keep assemblies tightly closed

d

hen in use.

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To prevent ignition of hazardous atmospheres, disconnect the

evice from the supply circuit before opening. After

d

4. Electrical Connections: One or two SPDT snap switches are provided, each
with normally open contacts closing and normally closed contacts opening when

ressure increases beyond the high setpoint. The contacts reverse, returning to

p

heir “normal” condition when pressure decreases below the low setpoint. Wire in

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ccordance with local electrical codes.

a

For convenience, two ground screws are provided. One is located inside the
housing and the other on the exterior, adjacent to the 3/4˝ NPT conduit connection.
Internal grounding terminal must be used for equipment grounding and the external

erminal is for a supplementary bonding connection where local codes or

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uthorities permit or requires such connection. Replace cover after wiring

a

onnections are complete.

c

ATEX and IECEx INSTALLATION INSTRUCTIONS
Cable Connection

The cable entry device shall be an Ex d certified cable gland suitable for conditions

f use and correctly installed. For Tamb 63.6°C, cable gland rated ≥ 80°C shall be

o

sed. Use cable rated 30°C higher than maximum Tamb.

u

Conduit Connection

An Ex d certified seal device such as a conduit seal with setting compound suitable
for conditions of use and correctly installed shall be provided immediately to the
entrance of the electrical housing. For Tamb 63.6°C, conduit seal and setting
compound rated ≥ 80°C shall be used. Use cable rated 30°C higher than maximum
Tamb.

All wiring, conduit and enclosures must meet applicable codes for hazardous
areas. Conduits and enclosures must be properly sealed. For outdoor or other
locations where temperatures vary widely, precautions should be taken to prevent
condensation inside switch or enclosure. Electrical components must be kept dry
at all times.

For units supplied with both internal ground and external bonding terminals, the
ground screw inside the housing must be used to ground the control. The external
bonding screw is for supplementary bonding
when allowed or allowed by local code. When external bonding conductor is
required, conductor must be wrapped a minimum of 180° about the external
bonding screw.

Range Spring

Adjustment Nut

DJUSTMENT

A

1. Determine the low and high setpoint pressures.

2. Connect tubing or piping from the pressure port on bottom to one leg of tee.
Connect the second leg to a pressure gage of known accuracy and in an

ppropriate range. The

a

hird leg should be connected to a controllable source of pressure.

t

3. Connect a volt/ohm meter or other circuit tester to the snap switch terminals to
indicate when switching occurs.

4. Slowly apply pressure to the system and note the pressure at which switch
ctuates. If adjustment is necessary, remove the clear plastic cover over the lower

a

alf of the switch. It is held in place by four machine screws.

h

5. Adjust the low setpoint first by using a 7/16˝ open end wrench on the left, range

spring adjustment nut. As viewed from above, turn nut clockwise to increase,
counter-clockwise to decrease the low setpoint (deactuation point).

6. Adjust the high setpoint by turning the deadband spring adjustment nut, on right,

clockwise to increase, counter-clockwise to decrease, the high setpoint (actuation
point).

7. Operate the switch through several pressure cycles to confirm proper setpoint

adjustment. Replace plastic cover.

MAINTENANCE

WARNING

The flame path dimensions differ from EN 60079-1 requirements. Repairs to be by
Dwyer Instruments, Inc.

The moving parts of these switches need no maintenance or lubrication. The
setpoint is the only user adjustment. On models with optional drain fitting,
periodically rotate the small captive screw from side to side several times to keep
drain path clear. Units in need of repair should be returned to the factory prepaid.

When cleaning exterior surfaces use a damp cloth to avoid
electrostatic charge.

Deadband Spring

Adjustment Nut

Refer to Certificate No. IECEx 11.0095 X for conditions of safe use for IECEx
compliant units.

Limited Warranty: The Seller warrants all Dwyer Instruments and equipment to be free from defects in workmanship or material under normal use and service for a period of one year from date of shipment. Liability under this warranty is limited
to repair or replacement F.O.B. factory of any parts which prove to be defective within that time or repayment of the purchase price at the Seller’s option provided the instruments have been returned, transp ortation prepaid, within one year from
the date of purchase. All technical advice, recommendations and services are based on technical data and information which the Seller believes to be reliable and are intended for use by persons having skill and knowledge of the business, at
their own discretion. In no case is Seller liable beyond replacement of equipment F.O.B. factory or the full purchase price. This warranty does not apply if the maximum ratings label is removed or if the instrument or equipment is abused, altered,
used at ratings above the maximum specified, or otherwise misused in any way.

THIS EXPRESS LIMITED WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER REPRESENTATIONS MADE BY ADVERTISEMENTS OR BY AGENTS AND ALL OTHER WARRANTIES, BOTH EXPRESS AND IMPLIED. THERE ARE NO
IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE FOR GOODS COVERED HEREUNDER.

Buyers Remedies: THE BUYER’S EXCLUSIVE AND SOLE REMEDY ON ACCOUNT OF OR IN RESPECT TO THE FURNISHING OF NONCONFORMING OR DEFECTIVE MATERIAL SHALL BE TO SECURE REPLACEMENT THEREOF
AS AFORESAID, THE SELLER SHALL NOT IN ANY EVENT BE LIABLE FOR THE COST OF ANY LABOR EXPENDED ON ANY SUCH MATERIAL OR FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES TO ANYONE
BY REASON OF THE FACT THAT IT SHALL HAVE BEEN NON-CONFORMING OR DEFECTIVE.

©Copyright 2016 Dwyer Instruments, Inc. Printed in U.S.A. 4/16 FR# 89-442112-00 Rev. 7

MERCOID DIVISION

Phone: [phone] www.dwyer-inst.com

DWYER INSTRUMENTS, INC. Fax: [phone] e-mail: [e-mail]
P.O. BOX 258 • MICHIGAN CITY, INDIANA 46360, U.S.A.