Control Point

Warning!

Before using the Control Point VAV panel with the VAV14-IP controller, make sure to upgrade its firmware to version V2.5.

Instructions how to upgrade firmware: iSMA Configurator.

Balancing Steps

To perform the balancing process and regulate the efficiency point of the ventilation system, follow the below steps. These activities are to performed in the presented order. If required, perform the balancing process with zeroing, however, according to the specific user and accuracy requirements, it is possible to omit the pressure sensor zeroing and/or minimum airflow calibration.

Balancing with zeroing

Pressure sensor zeroing.
Set the factory K-factor.
Measure the airflow and enter the value in the designated field.
Perform the maximum airflow calibration.
Measure the airflow and enter the value in the designated field.
Perform the minimum airflow calibration.

Balancing based on the maximum and minimum airflow calibration

Set the factory K-factor.
Measure the airflow and enter the value in the designated field.
Perform the maximum airflow calibration.
Measure the airflow and enter the value in the designated field.
Perform the minimum airflow calibration.

Balancing based on the maximum airflow calibration

Set the factory K-factor.
Measure the airflow and enter the value in the designated field.
Perform the maximum airflow calibration.

Therefore, in the Control Point VAV submenu, it is possible to skip the ZERO action under PRES and/or MINF action under FCAL.

KFAC

KFAC: sets the K-factor value to the airflow calculations;

K-Factor:
- Modbus register: 40289;
- BACnet object: AV61, property: Present Value;

FCAL

FCAL: executes a calibration action according to a new maximum and/or minimum airflow value(s);

ActualAirflow:
- Modbus register: 30012;
- BACnet object: AI11, property: Present Value;

Note

If performing the balancing process based on the maximum airflow calibration, it is possible to skip the MINF action here.

Actions
MAXF	Performs a calibration action according to a new maximum airflow value
MINF (optional)	Performs a calibration action according to a new minimum airflow value

02 CP balancing.png — Panel access to FCAL submenu

PRES

PRES: allows to set a differential pressure (initially displayed value measured by the VAV);

DifferentialPressure:
- Modbus register: 30016;
- BACnet object: AI15, property: Present Value;

Note

If performing the balancing process based on the maximum and/or minimum airflow calibration, it is possible to skip the ZERO action here.

Action

ZERO:

PressureZeroing:
- Modbus register: 00114;
- BACnet object: BV13, property: Present Value;

Performs the pressure sensor zeroing action

02a CP balancing - PRES.png — Panel access to PRES submenu

MODE

DAMP: allows to force an operating mode to a damper;

DamperCommand:
- Modbus register: 40268;
- BACnet object: MSV7, property: Present Value;

Damper mode	Action
AUTO	Set auto mode (VAV application logic takes control)
MAXF	Go to a maximum airflow
MINF	Go to a minimum airflow
USRF	Go to a user-set airflow
USRP	Go to a user-set position (% of damper opening)
OPEN	Damper fully open
CLOS	Damper fully closed
CLBR	Performs a damper calibration (the damper goes to 100%, then to 0%, and goes back to the control loop output)

UserSetPosition: user-set opening level (after selecting the USRF opting in the VAV_DAMPER_COMMAND variable);
- Modbus register: 40292;
- BACnet object: AV64, property: Present Value;
UserSetAirflow: user-set airflow setpoint (after selecting the USRP opting in the VAV_DAMPER_COMMAND variable);
- Modbus register: 40293;
- BACnet object: AV65, property: Present Value;
AirflowCalibration: allows to enter the airflow value measured by the hood for calibration;
- Modbus register: 40294;
- BACnet object: AV66, property: Present Value;

02b CP balancing - MODE.png — Panel access to MODE submenu

FAN: allows to force an operating mode to a fan;

FanCommand:
- Modbus register: 40269;
- BACnet object: MSV8, property: Present Value;

Fan mode	Action
AUTO	Set an auto mode (VAV application logic takes control)
MAXS	Set a maximum fan speed
MINS	Set a minimum fan speed
STOP	Stop fan

REH: allows to force an operating mode to a reheater;

ReheaterCommand:
- Modbus register: 40270;
- BACnet object: MSV9, property: Present Value;

Reheater mode	Action
AUTO	Set an auto mode (VAV application logic takes control)
OPEN	Fully open
CLOS	Fully closed

PER: allows to force an operating mode to a perimeter;

PerimeterCommand:
- Modbus register: 40271;
- BACnet object: MSV10, property: Present Value.

Perimeter mode	Action
AUTO	Set an auto mode (VAV application logic takes control)
OPEN	Fully open
CLOS	Fully closed