Dungs AA-A1-0 Series User manual

1 … 5
MC • Karl Dungs, Inc. • AA...A1 • Edition 2016.03 • P/N 261392
UL Recognized: UL 353
File # MH16628
CSACertied:CSAC22.2No.14
File # 201527
FM Approved: Class 3510, 3530
File#J.I.1T7A8.AF
Commonwealth of Massachusetts Approved Product Approval code G3-0106-191
AA...A1
Differential Air Pressure
Switch
Installation Instructions
TableofContents
USA CDN
TableofContents........................Page 1
Approvals ...............................Page 1
Attention ................................Page 1
Specications...........................Page 2
Models Designations & Ranges............Page 2
Operation...............................Page 3
Pressure Connection.....................Page 3
Application & Connection Examples........Page 3
InstallationPosition......................Page 4
Wiring..................................Page 4
Operation & Adjustment...................Page 5
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 f e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.
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.
Any adjustment and application-
specicadjustmentvaluesmust
be made in accordance with
the equipment manufacturers
instructions.
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 codes
and standards: NFPA 86, ANSI
Z83.4/CSA3.7,ANSIZ83.18/CSA
4.9,ANSIZ21.13,CSD-1,UL795,
CSAB149.1orCSAB149.3
[V] [A]
[Hz][VA]
Safety
first
O.K.

2 … 5
MC • Karl Dungs, Inc. • AA...A1 • Edition 2016.03 • P/N 261392
Specications
Max.OperatingPressure
MOP = 1.5 PSI (103 mbar)
Ambient/MediumTemperature
-40 °F ... +140 °F
(-40 °C … +60 °C)
Gases
Air and non-aggressive gases.
Not suitable for natural gas, propane,
butane and other combustable
gases.
Materials in contact with Gas
Housing: Polycarbonate
Switch: Polycarbonate
Diaphragm: NBR-based rubber
Switching contact: Silver (Ag)
°F
0
-40
+140
Gas
AA...A1 SPDT dierential pressure switch in pressure and vacuum ranges. The dierential pressure acts via the
diaphragm against the force of the setting spring on the micro-switch. The pressure switch operates
without any auxiliary power.
Contact Rating
5 A resistive,
3 A inductive @ 120 VAC
1 A @ 12 - 48 VDC
Electrical Connection
1/4 x 1/32” (6.3 x 0.8 mm)
at male terminals
Enclosure
NEMA Type 1 / NEMA Type 12 with
appropriate cover
Models Designations & Ranges
Type Version Description OrderNo. Factory setting
range
in.W.C.
Switching
hysteresis
in.W.C.
AA-A1-0-... AA-A1-0-2
AA-A1-0-3
AA-A1-0-4
No cover
No cover
No cover
266906
266904
266908
0.16 - 1.20
0.40 - 4.00
1.00 - 20.00
≤0.14
≤0.20
≤0.40
AA-A1-3-... AA-A1-3-2
AA-A1-3-3
AA-A1-3-4
Includes NEMA Type 12 cover
and 1/2 NPT conduit connection
Includes NEMA Type 12 cover
and 1/2 NPT conduit connection
Includes NEMA Type 12 cover
and 1/2 NPT conduit connection
266907
266905
266909
0.16 - 1.20
0.40 - 4.00
1.00 - 20.00
≤0.14
≤0.20
≤0.40
Ag
[A]
NEMA
[V][A]
[Hz][VA]
[PSI]

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MC • Karl Dungs, Inc. • AA...A1 • Edition 2016.03 • P/N 261392
Operation
Setpoint tolerance
Upper switching
pressure
Falling
Rising
Adjustment as pressure rises
Pressure
at meter
Switching hysteresis Δp
Lower switching
pressure
AA...A1MountingProcedure
• Use suitable hoses for the medium.
• Use a maximum 5/32” ID hose
• Secure the hoses with a cable tie or
a cable clip.
Pressure Connection
Denitionofswitching
hysteresis∆p
The pressure dierence between the
upper and lower switching pressures.
Connectionp2(–) =lowerpressure
Connectionp1(+) =higherpressure
Application & Connection Examples
System vacuum monitor
AA...A1 is connected to the air duct with
the p2 (-) connection. p1 (+) is not con-
nected with the air duct.
Do not seal the p1 (+) connection; it must
be open to the atmosphere.
Filter monitoring
To monitor a lter, the AA...A1 can be
connected as shown above.
Blower monitoring
For blower monitoring, connect con-
nection p1 (+) to the air duct on the
downstream side of the blower and con-
nection p2 (-) to the air duct upstream
of the blower.
Connection p1
must remain open
Connection p2 Connection p1 Connection p2 Connection p2 Connection p1
Prevent dirt from entering
into the device through con-
nection p1(+)

4…5
MC • Karl Dungs, Inc. • AA...A1 • Edition 2016.03 • P/N 261392
Wiring
• If applicable, remove the clear cover
from the switch.
• Use 14 or 16 AWG wire rated for at
least 75 °C.
• Connect the wiring to the appropriate
1/4 x 1/32” (6.3 x 0.8 mm) at male
terminals.
3
COM
IP 00
–
2
NO
1
NC
–
+
COM NO2
p
3 (P)
3
COM
IP 00
–
P
COM
3 (P)
NO
2
2
NO
1
NC
–
+
3
COM
IP 00
–
P
COM
3 (P)
NO
2
2
NO
1
NC
–
+
NC1
AA...A1
AA...A1
AA...A1
COM
3 (P)
NC
1
Flat-type connector
A 6,3 x 0,8 mm
DIN 46 244
NO
2
Medium Pressure
AA-A1… switching function
As pressure rises:
1 NC opens, 2 NO closes
As pressure falls:
1 NC closes, 2 NO opens
All wiring must comply with
local electrical codes, ordi-
nancesandregulations.
Do not exceed the switch
ratingsgiveninthespeci-
cationsandontheswitch.
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.
RefertoLabel!
3
COM
IP 00
Made in Germany
–
P
COM
3 (P)
NO
2
2
NO
1
NC
–
+
α
α
AA-A1-...
in W.C. ↓
air only 1.5 psi max.
AA-… A1
horizontally upside
down
vertical
InstallationPosition
Ensure that the
pressure switch is
i n s t a l l e d f r e e o f v i b r a t i o n!

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MC • Karl Dungs, Inc. • AA...A1 • Edition 2016.03 • P/N 261392
Adjusting the Set Point
• Do NOT attempt to adjust the factory setting of the switch.
Breaking the seal aects the switches ability to act as a
dierential switch.
Automatic Reset
• The NC contact of the AA...A1 breaks when pressure rises
above the set point. It makes automatically when pressure
falls below set point.
Annually check the switch for proper operation
SetPointCalibration
1.Connect a meter capable of reading +/- 0.1 ohms to the NC
and COM contacts.
2.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.
Operation & Adjustment
Maintenance&Testing
3.Apply pressure 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.
4.Connect a meter capable or reading +/- 0.1 ohms to the NO
and COM contacts.
5.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.
Mountingplate(atplastic) 230301
NEMAType1Cover(1pcs) 230216
NEMAType1Cover(77pcs) 231432
NEMAType2Cover(1pcs) 230280
NEMAType2Cover(200pcs) 250107
NEMAType12coverwith1/2NPTconduitconnection 225816
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 [phone]
Fax [phone]
e-mail[e-mail]
Internethttp://www.dungs.com/usa/
We reserve the right to make modications in the course of technical development.