FORM 098.202 REV 1405
DDC INTEROPERABLE PRESSURE INDEPENDENCE MODULE
E-PIM
DAMPER POSITION INDICATOR OPTION
-DPI Option for E-PIM
SERVICE
PIN
NETWORK
CONTENTS
NETWORK
INSTALLATION AND CONFIGURATION ........................... 1
POSITION INDICATOR CALIBRATION .............................. 1
CONFIGURATION VARIABLES ............................................ 2
INPUT NETWORK VARIABLES ............................................ 2
OUTPUT NETWORK VARIABLES ........................................ 2
DAMPER POSITION OUTPUT ............................................. 2
TROUBLESHOOTING ............................................................ 2
NETWORK
2
6
CW
W
CCW
10
CCW W CW
Damper Position Indicator option for E-PIM
DDC Interoperable Pressure Independence
Module.
9
45
60
Connect 24 VAC
Power to 9 and 10
100
Models:
8
These instructions are for the Damper Position
Indicator option only and are supplemental to the
E-PIM Installation, Operation and Maintenance
manual. See Acutherm Form 35.2 for the complete
E-PIM instructions.
9 & 10
24 VAC Supply
7
9
6
10
5
11
4
12
3
13
2
14
1
INSTALLATION AND CONFIGURATION
Follow the instructions as detailed in the E-PIM
Installation, Operation and Maintenance manual.
_Fig. 1 – E-PIM-DPI_
POSITION INDICATOR CALIBRATION
The position indicator requires calibration for proper operation. Calibration requires that the E-PIM be
installed on the damper and network communication is established.
1.
Identify if the damper is a clockwise to open or counter clockwise to open.
2.
Enter the damper opening direction into the configuration variable nciValveRotCW. A value of ‘1’ indicates
the damper is clockwise to open and a value of ‘0’ indicates the damper is counterclockwise to open.
3.
Using the input network variable nviManOverride close the damper.
(nviManOverride = HVO_MINIMUM,0,0) Note: the actuator has a magnetic clutch that will release when
the damper bumps up against a stop.
4.
Take note of the value returned in the output network variable nvoValveCalib.
5.
Enter the nvoValveCalib value when the damper is closed into the configuration variable nciValveMin.
6.
Using the input network variable nviManOverride open the damper.
(nviManOverride = HVO_MAXIMUM,0,0)
Note the value returned in the output network variable nvoValveCalib.
7.
Enter the nvoValveCalib value when the damper is open into the configuration variable nciValveMax.
8.
.
Page 1 of 2
FORM 098.202 REV 1101
E-PIM
DAMPER POSITION INDICATOR OPTION
9.
(Supersedes Nothing)
Return the unit from override using the input network variable nviManOverride.
(nviManOverride = HVO_OFF,0,0))
10. The damper position is now available on variable nvoValvePosition as 0-100 percentage where 0 is closed
and 100 is open.
CONFIGURATION VARIABLES
These configuration variables are in addition to the E-PIM configuration variables.
Function
Damper
Maximum
Damper
Minimum
Damper
Rotation
Description
Sets the maximum damper
position for the damper
position indicator
Sets the minimum damper
position for the damper
position indicator
Sets the damper rotation to
either clockwise or
counterclockwise
Symbol On Screen
(SCPTs, SNVTs)
Default value
Range Available
nciValveMax
0
0 – 255
nciValveMin
0
0 – 255
nciValveRotCW
1
1 = clockwise
0 = counterclockwise
OUTPUT NETWORK VARIABLES
These output network variables are in addition to the E-PIM output network variables.
Function
Description
Damper
Calibration
Damper
Position
Used to set nciValveMax
and nciValveMin
Displays the damper
position as percent open
Symbol On Screen
(SCPTs, SNVTs)
Default value
Range Available
nvoValveCalib
<varies>
0 – 255
nvoValvePosition
0.00
0 - 100
See Acutherm Form 35.2 for the complete list of variables.
DAMPER POSITION OUTPUT
Once calibrated the damper position will be available on output network variable nvoValvePosition as a
percentage of full open.
TROUBLESHOOTING
In addition to the Troubleshooting section of Acutherm Form 35.2 E-PIM Installation, Operations and
Maintenance manual:
1.
Confirm the wiring from the pc board to the position sensor is secure (see CCW, W and CW on Fig. 1).
2.
Confirm the position sensor is securely fastened to the actuator hub (see Fig. 1).
3.
Confirm the voltage between CCW and CW (see Fig. 1) is 2.5VDC.
4.
Confirm the voltage between CCW and W is progressing (or regressing) between 0VDC and 2.5VDC
smoothly as the damper turns.
ACUTHERM HEADQUARTERS 1766 Sabre Street Hayward, CA 94545 USA Tel +1 510 785 0510 Fax +1 510 785 2517 www.acutherm.com