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Johnson Controls AD-1252, Installation Instructions Manual

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Johnson Controls AD-1252 Installation Instructions Manual Download Page 18

AD-1252 Thermal Dispersion Probe Airflow Measuring System Installation Instructions

18

Adjust mA Output Filter Value

This option submenu allows the user to adjust the mA 
filter value used to speed up or slow down the mA 
output rate. Use the default value of 0.35 for the 
majority of applications. Use an mA filter value of 0.5 
when an instantaneous output signal is required for 
applications such as fan tracking. Decrease the value if 
the data is erratic.

The mA output filter responds to the air flow calculation 
and is applied to the 4 to 20 mA output signal only. As 
the value decreases, filtering increases. See Figure 28.

Auto Reset

This option submenu allows the user to enable or 
disable the automatic reset function. See Figure 29.

Auto Reset is a software timer that triggers a system 
reset only if the main program encounters a fault 
condition or the software code execution encounters an 
endless loop. Auto Reset brings the system back from 
an unresponsive state into normal operation and 
eliminates the need for constant user monitoring of the 
software. 

The default setting is ON. Set Auto Reset to OFF for 
troubleshooting. If normal operation is interrupted when 
Auto Reset is OFF, manually cycle power to the control 
to restore normal operation. 

 Temp Display

This option submenu allows the user to disable the 
temperature display. The default setting is ON. When 
the temperature display is OFF, the display only shows 
the air movement measurement. See Figure 30. 

Troubleshooting

During normal operation, two LEDs illuminate at the 
RJ45 connector on the DMPR-RA002 Electronic 
Controller. The left (green) LED indicates that the 
electronic controller has properly identified the probe. 
The right (amber) LED illuminates each time the 
electronic controller communicates with the connected 
thermal dispersion probe. See Figure 12.

If the right (amber) LED does not blink, reset the 
electronic controller by cycling the power switch OFF 
and then ON. See Figure 12.

Figure 28: Adjust mA Output Filter Value 

Submenu

UP

SW3

DOWN

SW4

UP

SW3

ENTER

SW5

ADJUST mA OUTPUT

FILTER VALUE

FILTER VALUE
:0.35

AUTO RESET

F

IG

:s

b

m

n

_mA

_ou

pt_fl

tr

_

v

a

l

Figure 29: Auto Reset Submenu

UP

SW3

DOWN

SW4

ENTER

SW5

ENTER

SW5

ENTER

SW5

AUTO RESET

AUTO RESET
:ON

AUTO RESET
:OFF

TEMP DISPLAY

TEMP DISPLAY

F

IG

:s

b

m

n_auto_r

s

t

Figure 30: Temp Display Submenu

UP

SW3

DOWN

SW4

ENTER

SW5

ENTER

SW5

ENTER

SW5

TEMP DISPLAY

TEMP DISPLAY
:ON

TEMP DISPLAY
:OFF

RESET SETTINGS

RESET SETTINGS

F

IG

:s

b

mn

_temp_

ds

p

ly

Summary of Contents for AD-1252

Page 1: ...les These limits are designed to provide reasonable protection against harmful interference when this equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is...

Page 2: ... technician should install this system To avoid unsatisfactory operation or damage to the product strictly follow the instructions provided and do not substitute parts Damage to the product resulting from not following the instructions or using unauthorized parts may be excluded from the manufacturer s warranty coverage ...

Page 3: ... 2 2 3 2 3 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 36 914 2 2 3 2 3 2 3 2 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 42 1 067 3 2 3 2 3 2 3 3 4 2 3 4 3 4 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 48 1 219 3 2 3 2 4 2 4 2 4 3 4 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 54 1 372 3 2 3 2 4 2 4 2 4 3 4 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 60 1 524 3 2 3 2 4 3 4 3 4 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 66 1 6...

Page 4: ... Configurations 90 45 60 60 FIG AD1252_3or4rd Table 2 Number of Probes Sensors per Probe for Round Duct Applications 1 Duct Diameter in No of Probes No of Sensors per Probe 12 2 2 18 2 2 24 2 2 36 2 4 42 2 4 48 3 4 60 4 4 72 4 4 96 3 4 120 4 4 1 The minimum diameter size is 12 inches for round duct applications Round duct applications smaller than 12 inches 304 mm use the same number of probes and...

Page 5: ...tions Duct Height in A Duct Width in B 12 18 24 36 42 48 60 72 96 120 12 2 2 2 2 1 3 1 3 3 2 3 2 4 2 4 2 4 2 4 2 18 2 2 1 3 1 3 3 2 3 2 4 2 2 4 2 4 2 4 24 2 2 2 3 3 2 3 2 4 2 2 4 2 4 2 4 36 2 4 3 3 3 3 4 3 2 4 2 4 2 4 42 2 4 3 3 4 4 4 4 4 4 4 4 48 3 4 4 4 4 4 4 4 4 4 60 4 4 4 4 4 4 4 4 72 4 4 4 4 4 4 96 4 4 4 4 120 4 4 Figure 5 Oval Duct Mounting Sensor Density Details ...

Page 6: ... The thermal dispersion probes may be installed in the vertical or horizontal plane of the duct Use vertical installation for fan discharge applications In vertical mount applications where moisture is possible mount the multiplexer on the top In horizontal mount applications mount the probes so that the plastic sensor shrouds are on the bottom of the probe to minimize moisture accumulation Accumu...

Page 7: ... mounting stud extends through the 2 in 50 mm holes in the opposite side of the duct 7 With the probes in place go to the other side of the duct plenum and install the mounting plates onto the studs With the stud centered in the 2 in 50 mm hole place the mounting bracket over the stud followed by the nut and washer Tighten the nut and washer against the mounting plate Do not over tighten Note Do n...

Page 8: ...b_dim Multiplexer End with RJ45 Connectors Mounting Stud End Figure 8 Probe with NEMA Type 4 Weathershield Note Box provided may appear different than the example above Figure 9 Probe with Standard Insertion Mounting Hardware Hoods Shown on Top for Illustrative Purposes Figure 10 Probe with Damper Stand off Mounting Bracket Figure 11 Probe with Internal Mounting Bracket ...

Page 9: ... a common transformer can result in lower than expected voltage at the device and higher than expected current draw when devices are connected a great distance from the power source Transformers for the DMPR RA002 Electronic Controller are not required to be isolated from other devices Isolation is only required to prevent electrical fluctuations due to intermittent high loads from causing problem...

Page 10: ...ielded cable end is connected to the controller 2 Move the electronic controller s power switch Figure 12 to the ON position 3 Use the LCD Contrast Adjustment screw Figure 12 to adjust the LCD contrast as desired Turn the screw clockwise to increase contrast Turn the screw counterclockwise to decrease contrast 4 Use the Options menu to configure the electronic controller for your application See F...

Page 11: ...controller Figure 12 RESET SETTINGS LCD ON OFF ERROR INDICATION TEST SIGNAL UNITS GAIN OFFSET ZERO CUTOFF DISPLAY VELOCITY OUTPUT FORMULA SCALE VELOCITY mA OUTPUT SIGNAL ADJUST mA OUTPUT FILTER VALUE AUTO RESET TEMP DISPLAY IMPORTANT To accept changes to any menu item press the ENTER button before pressing the ESC button to exit If you are using firmware version 8 4 or higher you return to the fac...

Page 12: ...u activates the error indication on the LCD screen When an error occurs the temperature appears as a lowercase letter f degrees Fahrenheit See Figure 17 Figure 15 Reset Settings Submenu RESET SETTINGS ARE YOU SURE YES FACTORY SETTINGS ARE YOU SURE NO LCD ON OFF LCD ON OFF UP SW3 DOWN SW4 ENTER SW5 ENTER SW5 ENTER SW5 fig sbmn_rst_sttngs RESET SETTINGS DISPLAY OFF LCD ON OFF DISPLAY ON UP SW3 DOWN ...

Page 13: ... 20 mA Press ENTER to accept the test output signal and turn the test signal ON See Figure 18 Note Connect the BAS wiring and verify the test signal at the BAS and automation scaling have been correctly configured If the test signal at the BAS does not produce expected results disconnect the BAS wiring and verify the test signal at the controller with a multimeter If the test signal at the control...

Page 14: ...d DOWN to scroll through the available units Press ENTER to select the desired unit If CFM or L S is selected the area is requested on the LCD screen Use UP and DOWN to adjust the area calculation Press ENTER to accept the area value See Figure 19 Figure 19 Units Submenu ENTER UNIT SYSTEM S I UNIT SYSTEM I U VELOCITY UNIT M S AREA VALUE 1 00 sq M AREA VALUE 1 00 sq ft VELOCITY UNIT FPM VELOCITY UN...

Page 15: ...SET sets Gain 1 Offset 0 and velocity units to FPM If the units displayed are for volume CFM and L S make sure that the area calculation is correct for each respective area where measurements are being taken 2 Record the flow rate displayed on the controller during the time that reference measurements are taken 3 Record reference measurements of the flow rate Make sure that the units FPM CFM M S a...

Page 16: ...hat the area calculated is correct for each area where measurements are being taken 8 Calculate the new gain for the controller 9 Calculate the offset for the controller 10 Enter the gain and the offset for the controller Note If the offset is greater than the zero cutoff adjust the zero cutoff to a value greater than the offset value to display zero during no flow conditions The Controller displa...

Page 17: ...Cutoff Submenu Versions 8 5 and later UP SW3 DOWN SW4 ENTER SW5 ENTER SW5 DISPLAY VELOCITY OUTPUT FORMULA ZERO CUTOFF FIG sbmn_zr_ctff_nwr CUTOFF VALUE 40 FPM Figure 25 Zero Cutoff Submenu Versions Prior to 8 5 UP SW3 DOWN SW4 ENTER SW5 ARE YOU SURE NO DISPLAY VELOCITY OUTPUT FORMULA ARE YOU SURE YES ZERO CUTOFF TEST SIGNAL ENTER SW5 ENTER SW5 FIG sbmn_zr_ctff Figure 26 Display Velocity Output For...

Page 18: ...ting If normal operation is interrupted when Auto Reset is OFF manually cycle power to the control to restore normal operation Temp Display This option submenu allows the user to disable the temperature display The default setting is ON When the temperature display is OFF the display only shows the air movement measurement See Figure 30 Troubleshooting During normal operation two LEDs illuminate a...

Page 19: ...r is closed Ensure that power and data cables are a sufficient distance from high voltage power sources and motors to prevent interference Conduit may be required Ensure that there are no kinks cuts or crimps in the shielded CAT5e cables Ensure there is no visible damage to the electronic controller Ensure that the thermistors are clean dry and free from debris The output of individual sensors is ...

Page 20: ... of the transmitter If more than one amber LED flashes at the same time the multiplexer circuit is not properly programmed If this problem occurs contact the factory The mA output has locked on a single value The mA OUTPUT CALIBRATION function did not exit properly 4 mA and 20 mA are set to 0 4 mA and 20 mA have less than a 500 FPM difference ESCAPE enters a zero value 1 Press ESC and ENTER at the...

Page 21: ...w increases VA decreases The output data varies and is not consistent The dampers are not sequenced properly Correct the sequence of operation The transmitter locks up and resetting the transmitter starts the operation RF interference from local high output transmitters ambulance police is at fault Shorten the CAT5e communications cable and if it is not shielded use shielded cable or place in a co...

Page 22: ...ve the mounting screws from the mounting plates on both sides of the thermal dispersion probe On the side with the RJ45 connector remove the four Phillips screws securing the mounting plate 4 Remove the lock nut and the washer from the mounting stud 5 Slide the thermal dispersion probe out of the duct from the side with the RJ45 connector 6 Wipe down the thermal dispersion probe with a damp cloth ...

Page 23: ...wer Consumption 4 probes with 4 sensors 65 VA 3 probes with 4 sensors 48 VA 2 probes with 4 sensors 35 VA 1 probe with 4 sensors 17 VA Transmitter Chassis 0 080 Aluminum Output Signals 4 to 20 mA standard 2 to 10 VDC requires 499 ohm resistor across output terminals Output Signal Adjustments Field adjustable offset gain Display 16x2 character LCD airflow temperature and diagnostics Velocity Requir...

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