VAV CAV conversion kit manual(A002)

6
| CAV control
Table 3 Symbol description
Symbol Description
Supply air
Extract air
CB
Connection board on the unit
RAHU
SAVE residential air handling unit
K
Iris damper or a similar device with known K-
factor
1
Push-button
2 Status LEDs
5.2 Configuration
Input signal configuration
1. Go to Service menu
2. Enter password (default 1111)
3. Configure supply air transmitter input. Go to Input menu. Select UNIVERSAL tab. Select the analog input to which
supply air VAV/CAV transmitter is connected. Example if it is connected to UI2 on the connection board, then select
UNIVERSAL INPUT 2. Select signal type as Analog input and select Supply Air Fan Control (SAFC) from the
input type list.
4. Configure extract air transmitter input. Go to Input menu. Select UNIVERSAL tab. Select the analog input to which
extract air VAV/CAV transmitter is connected. Example if it is connected to UI3 on the connection board, then select
UNIVERSAL INPUT 3. Select signal type as Analog input and select Extract Air Fan Control (EAFC) from
the input type list.
Fan control configuration
• Go to Service menu , enter Control Regulation menu and then Fan Control. In this menu, set Airflow
Type as Flow.
Important
Changing the airflow type does not change P-band value automatically. P-band value have to be changed
manually after changing the airflow type.
Transmitter configuration
Set adjusted working range for the added CAV pressure transmitter.
1. Go to Service menu then enter Control Regulation and select Fan Control. In this menu enter Pressure
sensors.
2. Configure pressure at 0 V, pressure at 10 V and alarm pressure for both SUPPLY AIR FAN CONTROL and EXTRACT
AIR FAN CONTROL settings.
For example, if pressure transmitter measuring range is 0-500 Pa, then set: 0 V = 0 Pa; 10 V = 500 Pa. Measuring
range can be changed with DIP-swtiches on the transmitter.
Set K-Factor values
Enter correct K-factor values for each Iris damper in menu.
1. Go to Service menu then enter Control Regulation and select Fan Control.
2. In this menu select SAF K-Faktor setting and enter K factor value found on the label of supply air duct Iris damper.
3. Then select EAF K-Faktor setting and enter K factor value found on the label of extract air duct Iris damper.
Note:
K-Factor can be found on Iris damper label.
211528 | A002