Dungs GGAO-A4-4 User manual

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MC • Karl Dungs, Inc. • GGAO...A4 • Edition 2016.02 • P/N 271843
 CSACertied:
CSA C22.2 No.14
CSA C22.2 No.0
UL 508
File # 2620681
GGAO-A4-4
Differential Gas Pressure
Switch
Installation Instructions
Table of Contents
USA CDN
Table of Contents ........................Page 1
Approvals ...............................Page 1
Attention ................................Page 1
Specication ............................Page 2
ModelDescription&PartNumber ..........Page 2
Operation ...............................Page 2
PressureConn.&MountingGGAO-A4.......Page 3
Installation Position ......................Page 3
Operation&Adjustment...................Page 4
Wiring ..................................Page 4
Maintenance&Testing ....................Page 5
Accessories&Replacement ...............Page 5
Approvals
1, 2, 3 ... = Action
• =Instruction
Explanation of symbols
Attention
On completion of work on the
pressureswitch,performaleak-
ageandfunctiontest.
Pleasereadtheinstruction be-
fore installing or operating. Keep
t h e i n s t r u c t i o ni na s a fe p l a c e .Yo u 
ndtheinstructionalsoatwww.
dungs.com.Iftheseinstructions
are not heeded, the result may
bepersonalinjuryordamageto
property.
Anyadjustmentandapplication-
specicadjustmentvaluesmust
be made in accordance with
the equipment manufacturers
instructions.
[V][A]
[Hz][VA]
Checktheratingsinthespecica-
tionstoverifythattheyaresuit-
ableforyourapplication.
IFGC
CSA
ULANSI
NFPA
This product is intended for
installationscoveredby,butnot
limitedto,thefollowingfuelgas
codesand standards:NFPA54
orIFGC (InternationalFuelGas
Code)orthefollowingequipment
codesandstandards: NFPA37,
NFPA 85, NFPA 86, ANSI Z83.4/
CSA 3.7, ANSI Z83.18/CSA 4.9,
ANSIZ21.13,CSD-1andUL795.
Theinstallationandmaintenance
of this product must be done
underthesupervisionofanex-
periencedandtrainedspecialist.
Neverperformworkifgaspres-
sure or power is applied, or in
thepresenceofanopename.
Safety
first
O.K.

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MC • Karl Dungs, Inc. • GGAO...A4 • Edition 2016.02 • P/N 271843
Specication
Max.OperatingPressure
MOP = 7 PSI (500 mbar)
Ambient/MediumTemperature
-40 °F ... +153 °F
(-40 °C … +67 °C)
Gases(both+and-connection)
Suitable for natural gas, propane,
butane, air & non aggressive gases.
Materials in contact with Gas
(+connection)
Housing: Aluminum
Diaphragm: NBR-based rubber
MaterialsincontactwithGas/Air
(-connection)
Housing: Aluminum & Steel
Diaphragm: NBR-based rubber
Switching contact: Gold (Au)
°F
0
-40
+153
Gas
GGAO-A4... SPDT gas/gas dierential pressure switch in pressure ranges. The dierential pressure acts via the dia-
phragm against the force of the setting spring on the microswitch. The pressure switch operates without
any auxiliary power.
ContactRating
10 A resistive @ 120 VAC
5 A resistive @ 240 V
1 A max. @ 12 - 48 VDC
DDC-Application
min. 5 mA @ 5 VDC
max. 20 mA @ 24 VDC
Electrical Connection
Screw terminals via 1/2”NPT conduit
connection
Enclosure
NEMA Type 4
Ag
[A]
Switch
SPDT
Switchaction
Pressure, vacuum of differential
pressure switch
[V][A]
[Hz][VA]
[PSI]
ModelDescription&PartNumber
Type Version Description OrderNo. Setting range
in. W.C.
Switching
hysteresis
in. W.C.
Factory
Calibration
Gasdierential
pressureswitch
GGAO-A4-4-2
GGAO-A4-4-3
GGAO-A4-4-5
GGAO-A4-4-6
Threaded connection
Threaded connection
Threaded connection
Threaded connection
271329
271330
271331
271332
0.16 - 1.20
0.40 - 4.00
2.00 - 20.00
12.00 - 60.00
≤ 0.12
≤ 0.20
≤ 0.40
≤ 1.2
Operation
Setpoint tolerance
Upper switching
pressure
Falling
Rising
Adjustment as pressure rises
Pressure
at meter
Switching hysteresis Δp
Lower switching
pressure
Denitionofswitching
hysteresis∆p
The pressure dierence between the
upperandlowerswitchingpressures.
NEMA
SPDT

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MC • Karl Dungs, Inc. • GGAO...A4 • Edition 2016.02 • P/N 271843
...ThreadedConnection
1 Pressure connection (+) 1/4” NPT, Gas or Air
2 Pressure connection (–) 1/8” NPT, Gas or Air. May also be
used as an atmospheric vent connection.
3 Test nipple p (+) Ø 0.35” (9 mm), integrated
GGAO-A4...MountingProcedure
• Apply good quality pipe sealant to the male threads only.
• Use 13/16” Wrench to secure the switch to the pipe.
 DONOTExceed177lb-inofTorqueon1/8”Connections
 DONOTExceed177lb-inofTorqueon1/4”Connections
• After installation is complete, perform a leak test.
PressureConn.&MountingGGAO-A4
Standard installation position is vertical upright diaphragm.
When installed horizontally, the pressure switch switches at a pressure higher by approx.
0.2 in. W.C.
When installed upsidedown, the pressure switch switches at a pressure lower by approx.
0.2 in. W.C.
When installed in otherpositions, the pressure switch switches at pressure deviating from
the set reference value by max. ± 0.2 in. W.C.
α
α
α
α
Made in Germany
0.4
4
in. W.C.
GGAO-A4-4
Adjustment
The scale indicates the setpoint when switch is mounted in
the vertical position and increasing pressure.
Installation Position
G 1/4
3
2
1

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MC • Karl Dungs, Inc. • GGAO...A4 • Edition 2016.02 • P/N 271843
1. Remove the clear cover from the switch.
2. Use 14 or 16 AWG wire rated for at least 75 °C.
3. Route the wires through the conduit connector.
4. Connect the wiring to the appropriate screw terminals.
5. Replace the clear cover from the switch.
Switchingfunction
Aspressurerisesabove
setpoint:
1 NC opens, 2 NO closes
Aspressurefallsbelow
setpoint:
2 NO opens, 1 NC closes
Wiring
Operation&Adjustment
AdjustingtheSetPoint
1. Remove the clear cover from the switch.
2. Adjust the switch to the desired set point by turning the
dial. The black arrow on the dial indicates the set point .
3. After adjusting the set point, verify that the pressure switch
operates as intended by using an accurate pressure gauge
connected upstram of the switch.
4. Replace the clear cover.
AutomaticResetandOperation
The NC contact of the GGAO-A4... breaks when pressure
rises above the set point. It makes automatically when pres-
sure falls below set point.
All wiring must comply with local electrical
codes,ordinancesandregulations.
Donotexceedtheswitchratingsgiveninthe
specicationsandontheswitch.
Medium Pressure



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MC • Karl Dungs, Inc. • GGAO...A4 • Edition 2016.02 • P/N 271843
Annuallychecktheswitchforproperoperation
Set Point Calibration
• Connect a meter capable of reading +/- 0.1 ohms to the NC
and COM contacts.
• Measure the resistance across the NC and COM contacts.
If the resistance is more than 1.0 ohm, the switch switch
should be replaced, since this indicates that the switch
contacts are starting to either corrode or carbonizing.
Maintenance&Testing
• Apply appressure to the + air pressure connection, and
conrm that the NC contact breaks when pressure rises
above the set point and that the NO contact makes. the NC
contact will make automatically when pressure falls below
the set point pressure.
• Connect a meter capable or reading +/- 0.1 ohms to the NO
and COM contacts.
• Measure the resistance across the NO and COM contacts.
If the resistance is more than 1.0 ohm, the switch switch
should be replaced, since this indicates that the switch
contacts are starting to either corrode or carbonizing.
Accessories&Replacement
Accessoryforpressureswitch OrderNo.
Replacementcover(cover,O-ring,2screws) 262248
Mountingbracket(metal)(1pcs) 230288
120VAClightmountingset(yellow) 231772
24VDC/VAClightmountingset(yellow) 231774
ReplacementconduitadapterM20to1/2”NPT 240671
DINconnector(femaleplug) 210318
MaleplugforDINconnector 219659
KarlDungsGmbH&Co.KG
P.O.Box1229
D-73602Schorndorf,Germany
Phone+49(0)7181-804-0
Fax +49(0)7181-804-166
e-mail[e-mail]
Internethttp://www.dungs.com
KarlDungs,Inc.
3890PheasantRidgeDriveNE
Suite150
Blaine,MN55449,U.S.A.
Phone763582-1700
Fax 763582-1799
e-mail[e-mail]
Internethttp://www.dungs.com/usa/
We reserve the right to make modications in the course of technical development.