A0020659 May 2014 Rev. 3 Direct Digital Controls (DDC) Installation, Operation, and Maintenance Manual Save these instructions. This
10 AV: 12: Heating Valve Output. This is the output, in percentage, of the PID loop which feeds the heating valve. A value of 0% is low fire, an
11 AV: 16: Modulating Damper Output. This is the output, in volts (V), which is being sent to the modulating damper from the controller. This AV
12AV: 20: Space (Room) Air Temperature Sensor. This variable provides the room air temperature sensor reading from the field installed sensor. Pro
13LIST OF BINARY VARIABLES (BV): BV: 1: BV Unit Enable (BAS). This is the Unoccupied/Occupied switch used for BAS control of unit run condition.
14 BV: 6: Outside Air Damper Command. This is the command to control the on/off state of the outside air damper. Used to confirm if the unit is
15 BV: 11: 2nd Stage Cooling Command. This is the command used to activate the stage 2 cooling output from the controller. Properties - F
16BV: 16: Room Override Status. This is the status of the room override space heating function. . Room Override will be On if the unit is operati
17- Activates if AV: 9, the Discharge Air Temperature, is greater than AV: 7, the cooling setpoint, plus 5.0 degrees, for 5 minutes. Cooling must b
18- Network Reference: oad_rntm - Modbus Register: 10023 - N2 Register: 23 - Lonworks ID: nvoOadRntmAlm - Activates if BV: 7 has been in the On
19LOGIC MODIFICATION NOTES AV:1 AV:2 AV:3 AV:4 AV:5 AV:6 AV:7 AV:8 AV:9 AV:10 AV:11 AV:12 AV:13 AV:14 AV:15 AV:16 AV:17 AV:18 AV:19 AV:20 AV:21 AV:2
2 TABLE OF CONTENTS WARRANTY ...
20Start-Up and Maintenance Documentation Job Information Job Name Service Company Address Address City City State State Z
3WARRANTY This equipment is warranted to be free from defects in materials and workmanship, under normal use and service, for a period of 12 months f
4INSTALLATION It is imperative that this unit is installed and operated with the designed airflow and electrical supply in accordance with this ma
5DDC PROTOCOL SELECTION 1. The appropriate DDC controls protocol is factory set using dip switches on the DDC controller. The four possible protoco
62. Using the rotary switches, set the controllers address. The factory default is 03. The number used is arbitrary, so long as it doesn’t conflic
7SOFTWARE SETUP & NETWORK VARIABLES The DDC controller provides a fixed set of analog and binary variables for adjustment in the field. These v
8 AV: 4: Effective Heating Setpoint. This is the effective heating setpoint, after the inclusion of internal logic to prevent rapid ramp-up/down
9 AV: 8: Cooling Stage 2 Offset. This is the offset value from AV:6, which will activate the second stage cooling. If the Intake Air Temperature
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