SAVE VTR 300B SERVICE AND ACCESSORIES INSTALLATIONV1 20210616 121938589

Accessories
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Configuration
1. Go to Service menu
2. Enter password (default 1111)
3. Configure control signal to the relay. Go to Output menu. Select DIGITAL tab. Select the digital output to which the
relay is connected. Example if it is connected to DO3 on the connection board, then select DIGITAL OUTPUT 3 and
select signal type as Outdoor-/Exhaust Air Damper from the output type list.
5.5.2 Cooker hoods for SAVE /B series
SAVE /B series have a dedicated 5th duct for air extraction through a cooker hood. This duct bypasses the heat ex-
changer and air from the kitchen gets removed directly to the outside.
Recommended cooker hoods can be found at Systemair
website in the product description of your ventilation unit.
Configuration
1. Go to Service menu
2. Enter password (default 1111)
3. Go to Input menu. Select UNIVERSAL tab.
4. Select the universal input to which the cooker hood is
connected. Example if it is connected to UI2 on the con-
nection board, then select UNIVERSAL INPUT 2. Set
signal type as Digital input and select an option
Cooker Hood Function from the input type list.
5.5.3 Pressure Guard
A differential pressure switch is used to detect air pressure difference in a duct. The contact in the switch changes (on/
off) when air pressure exceeds the setpoint value.
One of the possibilities is to use this device with a cooker hood which has an internal fan. Turned on cooker hood causes
air pressure to increase in the exhaust air duct. After exceeding a set air pressure value in the pressure switch, wires
from the ventilation unit get connected by contact and signal is sent to the ventilation unit to activate the Pressure
Guard function.
1. A differential pressure switch
2. Metal tube
3. Exhaust air direction
4. Exhaust air duct
1. Mount a differential pressure switch in a suitable place,
for example on or near the outlet duct from the kitchen
fan.
Set the pressure switch to the lowest possible pressure,
for example 20 Pa.
2. There are two possible installation cases. A pressure
switch tube is installed in the duct:
a. after the fan – connect plastic tube to P1 positive
pressure connection on the relay, P2 negative pres-
sure connection shall be left open.
b. before the fan – connect plastic tube to P2 negative
pressure connection on the relay, P1 positive pres-
sure connection shall be left open.
Install a rubber bush in the duct. Insert the S-shaped copper pipe into the rubber bushing so that it points towards the
air flow (i.e. towards the outlet opening for the fan).
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