SAVE VTR 250B SERVICE AND ACCESSORIES INSTALLATIONV1

Accessories
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37
• WC — water cooling battery
• SAT — supply air temperature sensor
• S — valve actuator
• 1 — Outdoor air
• 2 — Supply air
• 3 — Extract air
• 4 — Exhaust air
Component/product — Article number:
• CWK 125-3-2,5 Duct cooler,circ — 30021
• 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
• Transformer 24V — 202692
Fig. 12 Duct cooler connections
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.
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