SystemAir SAVE VTR 250/B Betriebs- Und Wartungsanleitung Seite 52

52 | Accessories
• RVAZ4 24A Actuator 0-10V (S) — 9862
• ZTV 15-0,4 2-way valve — 9829
• ZTV 15-0,6 2-way valve — 6571
• ZTR 15-0,4 valve 3-way — 9670
• ZTR 15-0,6 valve 3-way — 6573
• Duct sensor -30-70C (SAT) — 211524
Installation and connection
1. Install a duct water cooler in the duct. Connect pipes, 2/3–way valve and actuator.
Important
Do NOT use 24V DC power output from the connection board for valve actuator.
2. Connect actuator (S) to any free analog output.
3. An internal supply air temperature sensor (SAT, default connection AI2 on the main circuit board) must be replaced
by a duct temperature sensor which can be acquired as an accessory. A duct temperature sensor must be installed in
the duct after water cooler. Connect the duct temperature sensor to analog input 2 (AI2) replacing the internal supply
air temperature sensor.
Note:
A duct temperature sensor can be connected to analog inputs 6–7 on the connection board for better
access and then configured as a supply air temperature sensor. However the internal supply air
temperature sensor must be disabled in the control panel first.
Configuration
1. Go to Service menu
2. Enter password (default 1111)
3. Activate the actuator. Go to Components menu, select Cooler menu and select type as Water. Choose actuator
voltage type. Do advanced settings if necessary.
4. Configure control signal to the actuator. Go to Service menu. Select Output menu. In next menu select ANALOG
tab. Select the analog output to which the control wire of the actuator is connected. Example if it is connected to AO3
on the connection board, then select ANALOG OUTPUT 3 and select Y3 Cooling from the output type list.
5. Since a duct temperature sensor replaces internal supply air temperature sensor, it doesn't need to be re-configured.
Note:
A duct temperature sensor can be connected to analog inputs 6–7 on the connection board for better
access and then configured as a supply air temperature sensor. However the internal supply air
temperature sensor must be disabled in the control panel first.
6. Duct cooler and its components are now configured.
12.3.5 Change-over coil for heating/cooling function
Change-over coil can be used for both heating and cooling based on the demand.
Important
The change-over (heating/cooling) system can be implemented in many different ways and may vary in
each household. This description explains the most common solution for connecting and controlling heating
and cooling with a water coil and a heat pump. Please always check with your local "Systemair" consultant if
your different solution for change-over function is supported by SAVE units.
Fig. 17 Duct cooler connections
GB
211473 | B003