Air Monitor OAM II User manual
Precision Airflow Measurement
An ON
I
CON Brand
OAM II
Outdoor Airow Measurement
Installation and Operation Manual
For use with products shipped 6-2019 and Later
OAM II
Air Monitor 1-800-AIRFLOW Page 2 airmonitor.com
SAFETY
INFORMATION
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SAFETY PRECAUTIONS:
WARNING
Messages identied as “Warning” contain information regarding the per-
sonal safety of individuals involved in the installation, operation or service
of this product.
CAUTION
Messages identied as “Caution” contain information regarding potential
damage to the product or other ancillary products.
IMPORTANT NOTE
Messages identied as “Important Note” contain information critical to the
proper operation of the product.
OAM II
Air Monitor 1-800-AIRFLOW Page 3 airmonitor.com
1.0 GENERAL INFORMATION.................................................................................................... 5
1.1 PURPOSE OF THIS GUIDE ......................................................................................................................................................5
1.2 TYPICAL AIRFLOW MEASUREMENT SYSTEM INSTALLATIONS .........................................................................5
1.3 STANDARD FEATURES AND SPECIFICATIONS............................................................................................................7
1.4 MODEL NUMBERING CODIFICATION..............................................................................................................................9
1.5 CHECKING THAT YOU RECEIVED EVERYTHING ......................................................................................................11
1.6 WORKING ENVIRONMENT................................................................................................................................................11
1.7 SERIAL NUMBER .....................................................................................................................................................................11
2.0 INSTALLATION ................................................................................................................... 12
2.1 TRANSMITTER..........................................................................................................................................................................12
2.1.1 Site Selection.................................................................................................................................................................12
2.1.2 Transmitter Dimensions ..........................................................................................................................................13
2.1.3 Transmitter Installation ...........................................................................................................................................13
2.1.4 OAM II Transmitter Wiring Connections ........................................................................................................14
2.2 AIRFLOW SENSOR..................................................................................................................................................................16
2.2.1 Uni-Sensor......................................................................................................................................................................16
2.2.2 Dimensional Specications....................................................................................................................................16
2.2.3 Airow Sensor Installation ....................................................................................................................................17
2.3 AIRFLOW STATION.................................................................................................................................................................22
2.3.1 Airow Station Installation....................................................................................................................................22
2.4 TEMPERATURE SENSORS....................................................................................................................................................23
2.4.1 Temperature Sensors Installation.......................................................................................................................24
2.4.2 Temperature Sensor (RTD) Input Connections............................................................................................24
3.0 OPERATION ........................................................................................................................ 25
3.1 START-UP....................................................................................................................................................................................25
3.2 CONFIGURATION....................................................................................................................................................................26
3.3 STATUS BAR...............................................................................................................................................................................26
3.4 ENTERING THE PROGRAMMING MENUS..............................................................................................................27
4.0 MAIN MENU....................................................................................................................... 28
4.1 FLOW SETTINGS......................................................................................................................................................................28
4.2 DISPLAY SETTINGS ................................................................................................................................................................28
4.3 NETWORK CONFIGURATION............................................................................................................................................29
4.4 SET PASSWORD .......................................................................................................................................................................29
4.5 RESTORE FACTORY SETTINGS..........................................................................................................................................29
TABLE OF CONTENTS
OAM II
Air Monitor 1-800-AIRFLOW Page 4 airmonitor.com
4.6 PRODUCT INFORMATION ..................................................................................................................................................30
4.7 SENSOR STATUS ......................................................................................................................................................................30
4.8 BOARD DATA ............................................................................................................................................................................30
4.9 ANALOG OUTPUT TEST.......................................................................................................................................................30
5.0 SYSTEM SET-UP MENU ..................................................................................................... 31
5.1 FLOW CONFIGURATION......................................................................................................................................................31
5.2 DISPLAY CONFIGURATION ................................................................................................................................................33
5.3 ANALOG OUTPUT CONFIGURATION............................................................................................................................34
5.4 FILTERS AND LOCKDOWN .................................................................................................................................................35
5.5 FIELD CHARACTERIZATION...............................................................................................................................................36
5.6 CUSTOM ID CONFIGURATION .........................................................................................................................................37
6.0 COMMUNICATIONS..................................................................................................................... 38
6.1 BACnet MS/TP..........................................................................................................................................................................38
6.1.1 BACnet Object Types.................................................................................................................................................38
6.1.2 Protocol Implementation Statement................................................................................................................38
6.1.3 Standard Objects Supported.................................................................................................................................39
6.2 MODBUS .....................................................................................................................................................................................40
6.2.1 OAM II Modbus Registers.......................................................................................................................................41
7.0 MAINTENANCE .................................................................................................................. 43
8.0 TROUBLESHOOTING.......................................................................................................... 43
TABLE OF CONTENTS CONTINUED
OAM II
Air Monitor 1-800-AIRFLOW Page 5 airmonitor.com
SECTION 1.0
GENERAL
INFORMATION
conditioning.
1.1 PURPOSE OF THIS MANUAL
1.2 TYPICAL AIRFLOW
MEASUREMENT SYSTEM
INSTALLATIONS
OAM II
Air Monitor 1-800-AIRFLOW Page 6 airmonitor.com
OAM II
Air Monitor 1-800-AIRFLOW Page 7 airmonitor.com
1.3 STANDARD FEATURES AND SPECIFICATIONS*
*
OAM II TRANSMITTER
±0.1% at 32°F
-40°F to 120°F
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BTL
OAM II
Air Monitor 1-800-AIRFLOW Page 8 airmonitor.com
1.3 STANDARD FEATURES AND SPECIFICATIONS CONTINUED*
AIRFLOW STATION
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-40°F to 120°F
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*
OAM II FLOW ELEMENT
-40°F to 120°F
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•
OAM II
Air Monitor 1-800-AIRFLOW Page 9 airmonitor.com
1.4 MODEL NUMBERING CODIFICATION
OAM II Transmitter Model Number Coding = OAM II-ABCD-(EEFFG) (-HHIIJ)
A = Model Congurations
B = Enclosure
C = Feature Set (Based on model conguration)
D = Process Connection
EE = Channel One Flow Range
FF = Channel One Number of Uni-Sensors
G = Channel One Uni-Sensor Design
M =
(EEFFG) Channel One Flow Range and Uni-Sensor Conguration
(HHIIJ) Channel Two Flow Range and Uni-Sensor Conguration (required only for Two Channel conguration)
HH = Channel Two Flow Range
2B =
II = Channel Two Number of Uni-Sensors
J = Channel Two Uni-Sensor Design
M =
Notes
1.
2.
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3.
4.
*C = 3 when A = 8
OAM II
Air Monitor 1-800-AIRFLOW Page 10 airmonitor.com
OAM II AFS = Outdoor Airow Measuring Station
Airow Station Model Number Coding = OAM II-AFS-LSW-EFG-HHI
L = Casing Long Dimension or Diameter (in)
W = Casing Width (in)
E = Casing Material of Construction
F = Expanded Metal Material of Construction
G = Process Connections
I = Uni-Sensor Design
HH = Number of Uni-Sensors
S = Casing Short Dimension (in)
A = 8” to 12”
B = 13” to 24”
F = 61” to 72”
A = 8” to 12”
B = 13” to 24”
F = 61” to 72”
I = 97” to 108”
J = 109” to 120”
K = 121” to 132”
L = 133” to 144”
I = 97” to 108”
J = 109” to 120”
K = 121” to 132”
L = 133” to 144”
Notes
1.
2.
Please refer to the Ordering Guide and Order Form for additional information regarding ow element/station
selection and system operation ranges.
OAM II
Air Monitor 1-800-AIRFLOW Page 11 airmonitor.com
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1.5 CHECKING THAT YOU
RECEIVED EVERYTHING
1.6 WORKING ENVIRONMENT
1.7 SERIAL NUMBER
OAM II
Air Monitor 1-800-AIRFLOW Page 12 airmonitor.com
SECTION 2.0
INSTALLATION
2.1.1 Site Selection
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2.1 TRANSMITTER
30 15
200 100
500 250
1000 500
OAM II
Air Monitor 1-800-AIRFLOW Page 13 airmonitor.com
2.1.2 Transmitter Dimensions
NEMA 1 Enclosure NEMA 4X Enclosure
VOLU-flo/OAM II
Outside Air Monitor
DNENT
ESC UP
ON/OFF
Air Monitor
Precision Airflow Measurement
An ONICON Brand
10.3"
8.3"
3.1"
NEMA 1 ENCLOSURE
11.2"
9.3"
5.3"
NEMA 4X ENCLOSURE
VOLU-flo/OAM II
Outside Air Monitor
DNENT
ESC UP
6.6"
11.4"
7.0"
9.1"
2.1.3 Transmitter Installation
For NEMA 1 Enclosure:
For NEMA 4X Enclosure:
OAM II
Air Monitor 1-800-AIRFLOW Page 14 airmonitor.com
2.1.4 OAM II Transmitter Wiring Connections
RTD 1 RTD 2 AO1 / AO2 BACnet 24 V INPUT PWR
Rb2 Rb1 Ra Rb2 Rb1 Ra + com / + com D+ D- G SH L N G
AO3 / AO4
+ com / + com
ON
TERM
BIAS
TERM
BIAS
RTD 1 RTD 2 AO1 / AO2 BACnet 24 V INPUT PWR
Rb2 Rb1 Ra Rb2 Rb1 Ra + com / + com D+ D- G SH L N G
AO3 / AO4
+ com / + com
TERM
BIAS
J9
RESET
DNENT
ESC UP
J9
5
KEYED NOTES
1
8" FNPT CONNECTION, TWO (2) FITTINGS PER CHANNEL.
TWO (2), 1
2" CONDUIT CONNECTION KNOCKOUTS.
GRAPHICAL LCD FOR USER SET UP, COMMISSIONING AND
REAL TIME DATA DISPLAY.
USER PROGRAMMING AND DISPLAY KEYS.
I/O, RTD AND POWER INPUT TERMINAL BLOCK LOCATION,
REFER TO SECTION XX FOR ADDITIONAL INFORMATION.
TERMINATION RESISTOR / BIAS SWITCH LOCATION. REFER
TO SECTION XX FOR ADDITIONAL INFORMATION.
MICRO USB CONNECTION LOCATION. REFER TO SECTION XX
FOR ADDITIONAL INFORMATION
1
1
4
3
7
6
2
2
3
4
5
6
7
1
2
NOTES
1.
2.
3.
4.
5.
6.
7.
CAUTION
The electrical supply should be relatively clean, free of high frequency noise,
large voltage transients, and protected from power surges and brown outs.
Avoid installation locations that are in close proximity to strong sources of
electrical interference.
OAM II
Air Monitor 1-800-AIRFLOW Page 15 airmonitor.com
A. OAM II Power/Signal Connections
B. OAM II Analog Output & Serial Communication
GROUND
(-) COMMON (N)
(+) 24 V AC/DC (L)
INPUT POWER
TB - J8
INPUT POWER
RTD 1 RTD 2 AO1 / AO2 BACnet 24 V INPUT PWR
Rb2 Rb1 Ra Rb2 Rb1 Ra + com / + com D+ D- G SH L N G
AO3 / AO4
+ com / + com
TERM
BIAS
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•
AO2 (-) COMMON
AO2 (+)
AO1 (-) COMMON
AO1 (+)
AO4 (-) COMMON
AO4 (+)
AO3 (-) COMMON
AO3 (+)
SHIELD (SH)
RS485 GND
RS 485 (-)
RS485 (+)
ANALOG OUTPUT AND SERIAL COMMUNICATIONS
TB - J3
AO OUT 1 & 2
TB - J6
AO OUT 3 & 4
TB - J7
AO OUT 3 & 4
RTD 1 RTD 2 AO1 / AO2 BACnet 24 V INPUT PWR
Rb2 Rb1 Ra Rb2 Rb1 Ra + com / + com D+ D- G SH L N G
AO3 / AO4
+ com / + com
TERM
BIAS
OAM II
Air Monitor 1-800-AIRFLOW Page 16 airmonitor.com
2.2 AIRFLOW SENSOR
2.2.1 Uni-Sensor
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2.2.2 Dimensional Specications
L
VOLU-flo/OAM ll
OUTSIDE AIR MONITOR
12X
Ø.218
Ø4.00 LENGTH
LOW PRESSURE PORT,
1/4" COMPRESSION
HIGH PRESSURE PORT,
1/4" COMPRESSION
1.50
Ø.25
0
500
1000
1500
2000
2500
3000
0.000 0.500 1.000 1.500 2.000 2.500 3.000
Velocity SFPM
Total Pressure Drop In wc
Required Fixed Inlet Total Pressure Drop Graph
Inlet Pressure Drop:
OAM II
Air Monitor 1-800-AIRFLOW Page 17 airmonitor.com
Louvered Inlets:
SEPARATE MIN & TOTAL OA
SPLIT LOUVER INLET
MIN AND/OR TOTAL OA
SINGLE LOUVER INLET DUAL LOUVER INLET
MIN AND/OR TOTAL OA
2.2.3 Airow Sensor Installation
X
X/2
INLET C
L
UNI-SENSOR
SIDE VIEW FRONT VIEW
OAM II
Air Monitor 1-800-AIRFLOW Page 18 airmonitor.com
1.00(25.40)
.90(22.86)
.80(20.32)
.70(17.78)
.60(15.24)
.50(12.70)
.10(2.54)
.09(2.29)
.08(2.03)
.07(1.78)
.06(1.52)
.40(10.16)
.30(7.62)
.20(5.08)
.05(1.27)
.04(1.02)
.03(.76)
.02(.51)
.01(.25)
100 (30)
200 (61)
300 (91)
400 (122)
500 (152)
600 (183)
700 (213)
800 (244)
900 (274)
1000 (305)
2000 (610)
3000 (914)
4000 (1219)
5000 (1524)
6000 (1829)
7000 (2134)
8000 (2438)
9000 (2743)
10,000 (3048)
INTAKE
EXHAUST
PRESSURE DROP
Air Velocity in feet and (meters) per minute through Free Area
Ratings do not include the effect of a bird screen
Static Pressure Drop in inches w.g. and (mm)
AIR
FLOW
INLET LOUVER
UNI-SENSOR
OUTSIDE AIR
CONTROL DAMPER
BIRD SCREEN
2" MINIMUM
OAM II
Air Monitor 1-800-AIRFLOW Page 19 airmonitor.com
Rain Hood Inlets:
WITH OAM
STATION
WITH EXPANDED
METAL
STATION
WITH OAM
METAL
WITH EXPANDED
SINGLE RAINHOOD INLET
MIN. AND/OR TOTAL OA
DUAL RAINHOOD INLET
SEPARATE MIN. & TOTAL OA
SPLIT RAINHOOD INLET
SEPARATE MIN. & TOTAL OA
WITH OAM WITH EXPANDED
STATION METAL
IMPORTANT NOTE
Whenever possible, built-up systems should use attened galvanized or
stainless steel expanded metal with the dimensions that follow: 63% open
area, 0.05” thickness, 0.50” SWD x 1.25” LWD x 0.096” strand width.
OAM II
Air Monitor 1-800-AIRFLOW Page 20 airmonitor.com
Ducted Inlets:
METAL
EXPANDED
DUCTED
Multiple Inlets:
UNI-SENSOR
MOUNTED ON
EACH INLET
SIGNALS
MANIFOLDED
TOGETHER
W
Duct Size
H
EXPANDED METAL*
H
*Expanded Metal = Ducted Inlet Size + 1"
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